For all the haters out there who call this fake, I did some math and calculated the approximate speed using the doppler effect. Feel free to repeat and confirm the calculations and measurements yourself. And please correct me if I did something wrong. It's currently 5:20 am but I can't sleep, so some errors aren't unlikely. So first I downloaded the audio of this video into Audacity, and set it to spectrogram view. You can then see the frequency change from high to low as the drone passes the microphone on the ground. No, I just measured the frequency of the lowest peak form before and after the drone passed the camera: f1 = 1588 Hz f2 = 961 Hz I assumed the speed of sound as c = 340 m/s. It probably was a bit slower as it looks to be quite cold outside in the video. But its effect isn't that big. Now plug that in into the formula for the doppler effect with the moving source: (1) f1 = fs/(1 - v/c) -> Quad moving towards camera (2) f2 = fs/(1 + v/c) -> Quad moving away form camera I just solved that for fs and v and got fs = 1197 Hz and v = 83.6 m/s = 301 km/h Now you might notice that my result is about 75 km/h lower than in the video. The problem is that the frequency change in the audio took about 1.4 seconds. In this time the quad increased its velocity from around 350 to 375 km/h. The rpm of the motors likely also increased a bit during this time, increasing fs. So it's really hard to accurately measure the velocity this way. However, my calculation still shows that this quad was fast as fuck :D
This is the most beautiful comment I've ever seen. I wouldn't have thought to measure the doppler effect on this. Nice work! This quad is impressive but the flying on this channel is even more so.
@@adamhale6672 Thank you for the kind words! I just hate it when people make claims without providing evidence or at least an explanation of how they came to that conclusion. And I have to agree, quadmovr has some spectacular piloting skills, especially on LOS. And some ridiculous and awesome builds.
Great job :), but there's one more thing: I don't know where the pilot is standing in respect to the quad, but obviously not exactly in the flying path during the approach. I assume the pilot was standing right side to the quad, maybe 30 m? Because of this, the frequency change has this 1.4 second duration and you would also consider this transverse angle, which then will increase your virtual speed. In Addition: If we would know the flying level (height) and the engine rpms, we could be pretty precise with the calculations you started.
@@MoDNcA I think the wires are short enough and the 150A will warm them, but it wasn't a really long time and the air flow was pretty strong. Plus 150A/4 motors is ~35A/motor.
@@MoDNcA the term horsepower is misleading, a human has 5 horsepower, and a horse can have much more, so the drone probably had the power of a person walking forward
6S 170A 3.5-4kW at this point the most important part is probably a battery that can withstand this and still doesnt weight too much... is it the r line v3? GPS speed is not all that reliable, its usually quite a bit higher. Id say this might have peaked at 390kph.
Do you have any recommendations for batteries for speed builds? Manufacturers c rating and amp draw seem so inaccurate now, I know you probably can't say what you've used but any suggestion of good brands is great
what i think? i dont like that they dont give any credit to the one who advised them and on whose work it is based. ddg told me they will do in their tech video about their drone. we will see. although it is not the same. its not the only one, first or fastest.
@@quadmovr hi can you tellme how to safely storage fpv battery, im new in fpv drone, and already have 4dead battery😢, do li-ion have more durabilty than li-po?
@stephanuswidjaja105 li-po batteries have FAR greater discharge current than li-ion. li-ion is great for long distance flights, but they just don't have the ability to keep up when you're really giving it the beans
It for sure is fast as heck! Awesome power, and from the video it seems at least 250kph, but to believe it's over 375 I'd need a speed gun. The moment you reduce throttle and go into the turn, it just seems so slow. Yes, you are pretty high up and the higher you get the slower any drone feels in the air. But that still feels a lot slower than 80-120kph in the turn. Nethertheless awesome build, thanks for sharing and I really want to see more!
I see a lot of people don’t trust the gps. You could measure two points in the video that can clearly be seen in google maps and then measure them in google and see how long it took to travel that distance. Should give you a pretty good way to prove the speed.
i dont care if people believe it or not. havnt posted it to claim anything. validated it for myself right after the flight the way you mentioned. the brown field starting at the dirt road is ~142m long, it takes 35 frames to reach the end, which are 1.408s (dvr fps 24.85), which results in an average speed of ~363kph for the length of the field, where the quad is still accelerating.
i can imagine that people dont believe it. among other things because they dont know the most important parameters such as height, cam angle, fov etc. but foremost because the most have never seen this speed from that kind of perspective. and perspective is what is most deceptive. the less knowledge the louder the fake screamers.
GPS velcoity is typically accurate to within 0.5 m/s or less. It is very very accurate. The method of flying between two locations and timing it is actually very inaccurate, especially when timing is done using the FPV feed. A tiny change in altitude or pitch angle throws the measurement off completely.
@@quadmovr I think that it is amazing, despite of the fact that it is normal to have some doubts because it is very impressive, I am interested in some effects like the blades may reach transonic speed in this type of aircraft. What is the angle of the quadcopter at the top speed? And how long is the blades?
Woaooo. Nice performance 🤩 i can't really read but approx 3" to start from 100 to 350 kmh? Could you give us a more precise idea by counting frame on your original dvr ? Or have you a log with it? I understand the acceleration is not your target, but it's already so quick... 👌
Im curios what prop you are using? I have a build with the F80 2200kv and every time I punch the throttle like this I flatten the props out and they crack or explode.
@@briangustin1085 Ill look into these again. I just want to see what this bird is capable of. Freestyles and cruises just fine, just cant full throttle it..lol
That’s absolutely insane! What props are you using? Also I have the same Tmotor F80 pro’s, but when I fly them on 5 and 6S they get incredibly hot, I really can’t even fly on 6S because they don’t work right from the high temperature. How did you fix that issue?
@ I expect him to not charge 150/hour for a drone? 💀 plus how expensive can a board be? Vtx + camera = 250, AIO lets say 150, motors 100, and whatever else I forgot (antenna, props, etc) adds up to like 800 max. I also doubt he’s charging that much
@@uviolin593 Well the parts for mine cost min $1200 if you want quality. Plus the time and effort to build it, test, tune it. Of course you'll be looking at big bucks. Why would you expect him to not charge $150/h? Yeah it's for a drone? it's not for a paper plane lol
There's one on sale right now at Race Day Quads, for 139.99, bind n fly, just need rx. Diatone GT R349, the Guys from UAVquad channel, in austraila clocked it with a radar gun doing 118mph. That's stock parts right out of the box, no tuning either.
all the details are in the title or description like on every video i post. always. it has a reason when something is missing. sometimes there are details i cant or im not allowed to tell.
Not at all mate if it was producing that wattage and not using it then yes , there's a little thing called efficiency . Half if that goes towards heat ! :-)
@@JonnySonder Sorry, but I don't get your anwer. I'm just saying that metric system have some rules of using it. If somebody will make a typo in your name you kindly correct him, right? Being rude was not my intention. If it was rude by pointing this "kph" thing then I'm trully sorry
@@LeesEBR Hmm, but why? Basically by writing kmph it looks like kilo miles per hour :) There is very good logical reason why / character was chosen. It because it avoids confusion and scales up for any unit as you have clear separation between them. In let say meters per second you would need to write mps (m/s is correct way to write it), for centimeters per seconds it would be cmps or cps (cm/s is correct way to write it). One of the goals of metric system was to have units the same on entire world regardless of language or region. More than 90% of world population already use metric system. Also think of km/h as two divided symbols. You don't want to put another "symbol" which is not a symbol in between as all will blend and produce mixture of symbols and words. There are many SI units and if we would like to be consistent we would have to use "per" in every context. For example one Watt is one Joule per second. To follow that "p" for "per" rule we would need to write it as W = Jps. This makes symbols unreadable as they merge together with p. W = J/s is much more readable. One Pascal or pressure (following p approach) should be written as Npm^2 instead of N/m^2. In addition it could be interpreted as Newton times pico meter squared! :) That doesn't make any sense. That's why it's better to agree that every unit symbol division is written with "/". That's exactly what is done in SI (International System of Units - simply metric system). Also symbol for kilo is "k". Prefixes are case sensitive. "M" is mega (power plans power is in mega watts or MW), "m" is mili (medicine drug could be mili gram or mg). "k" is kilo, so the only correct way is to write velocity is: km/h (not Km/h, not KM/h, not km/hr).
Hammerhart! Weiß man die ungefähre Drehzahl der Rotoren und ob man dabei mit den Flügelspitzen an die Schallgeschwindigkeit rankommt? Edit: 😁 Nee, hab mal grob nachgerechnet... Bei 120mm Flügeldurchmesser müssten das dann knapp 55000 U/min sein.. 😳😲 Soooo viel ist es dann sicherlich doch nicht, ist ja schließlich keine Turbine... 😁
es sind 37-40k rpm. der bereich in dem sich der widerstand schlagartig enorm erhöht fängt schon bei mach 0.8 an. also sollten die propspitzen diesen schon nicht erreichen um nicht enorm inefficient zu werden.
Video description says it's this quad, just with other motors and maybe ESC: instagram.com/p/CJTi_8er4jW/. Did you do any aero canopy / fuselage mods or did you reach these top speeds with the air resistance inherent with this (standard'ish) frame design?
@@quadmovr Now everything makes sense again :-) F80s on the way on my side, even 6052 props did not 'propel' the quad into the sweet speed range for better grip. Maybe it's the Karearea motors (2208/2150kV), maybe the ESC is not up to the task (4x45A) yet on 6S... air drag should be under control, though :-)
I'm curious what props you use, or think are the highest speed? I've been doing the calculation for pitch and can't find many props that are geared for max speed.
@@quadmovr I've been trying to figure out why biblade, since 3 blade usually has more thrust...I guess at high speed maybe cause the motor can spin it faster? But you had that one that used cine props with like 6 or 7 blades right?
I would guess not really because for the radio signal you would have to plug in lightspeed in atmosphere which would make the denominator stay closer to 1 as lightspeed is significantly higher than the quad velocity.
@@quadmovr Thank you. Determined main sound (scream, actually :-)) harmonics of props in your video to be around 1570Hz (trying to figure out Doppler effect center). If this is accurate, 2-blade rpm would be around 1570/2*60=47,100rpm. @7 pole pairs this equals 330kerpm which is well within the feasible range for ESCs. Talking 6S and 2500kV, expected max rpm (assuming load factor of 0.75, thus voltage @ v_max = 25.2V*0.75=18.9V) is 18.9V*2500rpm/V = 54,000rpm. Prop slip introduces another factor of e.g. 0 .8, so rpm @ v_max is around 47,250 - same ball park... :-) Speedwise, this translates into a backwards calculated prop pitch of around 375/3.6m/s/(1570Hz/2)=0.1327m=5.2". Prop slip factor taken into account, pitch needs to be somewhat higher, maybe north of 5.2"/0.8 = 6.5" at least... 5" prop size assumed, prop tip speed would be 2*PI*1570Hz/2*5"/2=313.2m/s which is very close to but still BELOW speed of sound. No hitting the sound barrier :-) Any thoughts on these assumptions - way off or maybe baby? ;-)
Got some 5x7.5 APCs and tried to force them into their sweet spot of grip but failed (Toa Lite 2208 2150kV, 45A F3 Tekko32 ESC with some tweaked settings for timing and demag, 1300mAh 6S tattu). Felt like power limited around 130kph... :-( still working out why, e.g. it was pretty darn cold that day...
@@reinhardplietsch9707 maybe baby - your calcs are close 👍 regarding apc props, the air 'input' speed must be pretty high to get grip and to not stay in a constant stall.
@@quadmovr Great! That's what it feels like, stalled in a short circuit of airflow. Any hints what I can do to get them props passing the threshold into the sweet spot?
it will kill most cars no problem and in the 1/4 mile theres an argument for it racing full blown drag cars and slapping it out the box basically if it was nothing to full throttle and there was a good enough fc and esc combination for that these things would be nearing slapping top fuel cars id say assuming this quad goes from no throttle to full your looking at about 4-4.1s 1/4 mile times
@@billyshears9714 the demon is electronically limited to 168 but can do 200 with some basic changes the hellcat will do 203 in its top spec so yeah both of those cars lose in top speed too.. till you change them then yeah i dont know of any hellcats that do 4s 1/4 miles (fastest quad 1/4 mile from memory) but im sure it would be a good race
For all the haters out there who call this fake, I did some math and calculated the approximate speed using the doppler effect.
Feel free to repeat and confirm the calculations and measurements yourself. And please correct me if I did something wrong. It's currently 5:20 am but I can't sleep, so some errors aren't unlikely.
So first I downloaded the audio of this video into Audacity, and set it to spectrogram view. You can then see the frequency change from high to low as the drone passes the microphone on the ground.
No, I just measured the frequency of the lowest peak form before and after the drone passed the camera:
f1 = 1588 Hz
f2 = 961 Hz
I assumed the speed of sound as c = 340 m/s. It probably was a bit slower as it looks to be quite cold outside in the video. But its effect isn't that big.
Now plug that in into the formula for the doppler effect with the moving source:
(1) f1 = fs/(1 - v/c) -> Quad moving towards camera
(2) f2 = fs/(1 + v/c) -> Quad moving away form camera
I just solved that for fs and v and got fs = 1197 Hz and v = 83.6 m/s = 301 km/h
Now you might notice that my result is about 75 km/h lower than in the video. The problem is that the frequency change in the audio took about 1.4 seconds. In this time the quad increased its velocity from around 350 to 375 km/h. The rpm of the motors likely also increased a bit during this time, increasing fs. So it's really hard to accurately measure the velocity this way. However, my calculation still shows that this quad was fast as fuck :D
This is the most beautiful comment I've ever seen. I wouldn't have thought to measure the doppler effect on this. Nice work! This quad is impressive but the flying on this channel is even more so.
@@adamhale6672 Thank you for the kind words! I just hate it when people make claims without providing evidence or at least an explanation of how they came to that conclusion.
And I have to agree, quadmovr has some spectacular piloting skills, especially on LOS. And some ridiculous and awesome builds.
Time well spent, I want this drone even more now after that proof.
full respect!!
Great job :), but there's one more thing:
I don't know where the pilot is standing in respect to the quad, but obviously not exactly in the flying path during the approach. I assume the pilot was standing right side to the quad, maybe 30 m? Because of this, the frequency change has this 1.4 second duration and you would also consider this transverse angle, which then will increase your virtual speed.
In Addition: If we would know the flying level (height) and the engine rpms, we could be pretty precise with the calculations you started.
150A x 20V ~ 3,000 Watts
3,000 Watts/746 ~ 4 horse power 🐎🐎🐎🐎
Thats 1hp per motor
How’s that possible? At this power density the wires in the motors should melt after a few seconds 😳
@@MoDNcA I think the wires are short enough and the 150A will warm them, but it wasn't a really long time and the air flow was pretty strong. Plus 150A/4 motors is ~35A/motor.
@@MoDNcA the term horsepower is misleading, a human has 5 horsepower, and a horse can have much more, so the drone probably had the power of a person walking forward
At this speed, if your drone were struck by lightning, it would never be seen in "the near future".
160 amps omfg
MAXUM POWER
is that even possible??! i mean the cables should’ve been 🔥 🔥
@@irc1414 they had air cooling
@@drabberfrog dangg
This thing just Made over 4hp..
If that drone weight 0,5KG thats 8hp/KG.
Formular 1 has 0,5hp/KG
quadmovr is a serious understatement, thats quadgonr
FAA has entered the chat: 😐😐😐😐😐😲😲😲😡
FAA can go check Boeing once again
@@fluoxethine DAYUMMM but not wrong 🤣
You can clearly hear the Doppler effect at 0:06.
Thank you for this comment, it gave me the idea to calculate the approximate velocity of the quad using the doppler effect.
160 amps, i feel bad for those batteries
I saw a 170amp peak
I love the mild chuckling in the background shortly after you top out at 375kpm . . . tough crowd.
I met this guy in South-Germany. He came out of nowhere and stole us the show. ✌️
Near munic?
THAT is how you do motion blur!
Insane, above 160A, I saw a peak of 170A this can easily follow any F1
That battery ought to be toast now
376 km/h and 3300 W... incredible...
Watching the voltage drop from 22.4v to 19v, you can just about hear the battery going "Somebody put me out of my misery....."
150 Amps ... did you use copper pipes between the battery and the motor? :-)
indeed im using solid copper wire between esc and motors.
@@quadmovr Lol I saw a spike to 170 and was thinking, isn't that like 3500-4000 WATTS!??!
@@onenerdarmy yes thats what it is 😅
170 amps is unseen on anything... Didn't realize a drone could pull 3kw+ but jeez
Wow! Amazing!
Can you share the whole setup?
And what prop are you using?
its in the description. custom 2 blade props, cant tell you more atm.
can u show us the quad please !
170.4 amps 😮 ..that is an INSANE amount of power
6S 170A 3.5-4kW
at this point the most important part is probably a battery that can withstand this and still doesnt weight too much... is it the r line v3?
GPS speed is not all that reliable, its usually quite a bit higher. Id say this might have peaked at 390kph.
its an old prototype of a 6s1350 from last year, never went on sale. im sure i would reach higher speeds with fresh batteries but i dont have any.
@@quadmovr thats crazy, I thought you were using overcharged brand new packs for these runs.
What does the drone look like? Pics??
3 kW electrical power, wow! Much respect for Fettec and whoever built the battery used.
well it's within it's limits.. 45A 4in1 =180A, and current was
Would be great to see more details & how this beast handles the 160+Amps! Thanks for sharing :)
Peak amps around 170a and voltage drop down to 3.23v per cell !!
Huge hit on that battery! WOW!
Watching that mAh meter zoom is just incredible!
true
Do you have any recommendations for batteries for speed builds? Manufacturers c rating and amp draw seem so inaccurate now, I know you probably can't say what you've used but any suggestion of good brands is great
What do you think about redbull using this now? And calling it the only one in the world?
what i think? i dont like that they dont give any credit to the one who advised them and on whose work it is based. ddg told me they will do in their tech video about their drone. we will see. although it is not the same. its not the only one, first or fastest.
@@quadmovrdas sollte öffentlich gemacht werden
But to be fair, this isn't a camera drone. Redbull, and the team who actually made that drone, said it's the fastest CAMERA drone.
@@xxBlackpspxx its not about that expression at all.
Looking forward to seeing the build!
166 amps peak? What kind of battery have you used for this?
dont remember the exact one. must have been an gensace tattu 6s1350. they survived one, max two flights until they were chemically dead.
@@quadmovr hi can you tellme how to safely storage fpv battery, im new in fpv drone, and already have 4dead battery😢, do li-ion have more durabilty than li-po?
@stephanuswidjaja105 you can safely dispose of them by throwing them into the ocean.
@stephanuswidjaja105 li-po batteries have FAR greater discharge current than li-ion. li-ion is great for long distance flights, but they just don't have the ability to keep up when you're really giving it the beans
@@adhdaf thanks! i will replace all my lipo to li-ion battery, i prefer longrange than acrobatic
When your quad starts pulling 3kW, you know you're doing something right. That's twice as much as a fairly decent vacuum cleaner!
What prop is this? Can you achieve the same speeds with a larger one or is 4in the sweet spot for 2500kv 6s?
Back when FPV drone was a normal civilian drone
Bruh is training for WW3
why didnt his cables melt instantly pulling 170 Amps?
I gues thick cable and it was only for like 3 seconds
Awg 1 cables😂
@@finn_h06 Plus there's a LOT of cooling going on at almost 400km/h lol
150 amps??
165amps at max
It for sure is fast as heck! Awesome power, and from the video it seems at least 250kph, but to believe it's over 375 I'd need a speed gun. The moment you reduce throttle and go into the turn, it just seems so slow. Yes, you are pretty high up and the higher you get the slower any drone feels in the air. But that still feels a lot slower than 80-120kph in the turn.
Nethertheless awesome build, thanks for sharing and I really want to see more!
Incredible! Which props? Pretty steep 2-blades I guess?
custom 2 blade props, cant tell you more atm.
What battery are you using? That is a very impressive battery
Setup?
that lil battery crankin out 3000 watts.. damn
Thats 3x my ebike at full throttle!
Wait... isn’t the fastest quad like 170???
Yes. This guy now has the world record by over 60mph
WTH?!! Wow, not only are you the best LOS pilot on the planet....you are now the Fastest!!
Congratulations, Movr!
I honestly love the sound this drone makes.
It hit 376 at 0:08 though 😮 even if for a split second
I see a lot of people don’t trust the gps. You could measure two points in the video that can clearly be seen in google maps and then measure them in google and see how long it took to travel that distance. Should give you a pretty good way to prove the speed.
i dont care if people believe it or not. havnt posted it to claim anything. validated it for myself right after the flight the way you mentioned. the brown field starting at the dirt road is ~142m long, it takes 35 frames to reach the end, which are 1.408s (dvr fps 24.85), which results in an average speed of ~363kph for the length of the field, where the quad is still accelerating.
i can imagine that people dont believe it. among other things because they dont know the most important parameters such as height, cam angle, fov etc. but foremost because the most have never seen this speed from that kind of perspective. and perspective is what is most deceptive. the less knowledge the louder the fake screamers.
GPS velcoity is typically accurate to within 0.5 m/s or less. It is very very accurate.
The method of flying between two locations and timing it is actually very inaccurate, especially when timing is done using the FPV feed. A tiny change in altitude or pitch angle throws the measurement off completely.
@@quadmovr I think that it is amazing, despite of the fact that it is normal to have some doubts because it is very impressive, I am interested in some effects like the blades may reach transonic speed in this type of aircraft. What is the angle of the quadcopter at the top speed? And how long is the blades?
Hail to the king "quadmovr" 🤴
Where can I contact you, I want to build one of these, could I 3d printed the fuselage out of carbon fibre nylon?
Damn man!!! You’ve beaten my record!!! That’s it!!!!
The gloves are off!!!
🥊 👊 🧤
Woaooo. Nice performance 🤩 i can't really read but approx 3" to start from 100 to 350 kmh? Could you give us a more precise idea by counting frame on your original dvr ? Or have you a log with it? I understand the acceleration is not your target, but it's already so quick... 👌
Idk about 200mph + but its still insane 👏 I love that sound
WHAT IN THE HELL !!!!!! That’s insane !!!!!!!! Love your content brotha keep on keeping on!!!!
yep that's faster than a supra
anything is faster than that soyboy mobile
20V/160A ... I would almost expect it to melt with each tiny engine consuming 800W.
Ok hold up, pulling 160 amps how is that even possible? What esc are you running? Im ao confused and impressed all at the same time 😂
a 4in1 45a prototype esc was used back then.
what camera angle you need to go +200mph???
im using 45°. the toothless cam has a very wide fov so i can see the horizon no matter if im hovering or goin full speed.
If you look closely it was 376km/h if the Speed-Value on the bottom left can be trusted, for a frame or two it showed 376kmh ! ❤️👍🏽👍🏽👍🏽👍🏽👍🏽
What happened at 0:08? looked like the quad lost rx for a second.
esc overheat protection kicks in on one of the escs.
2500 KV IN 6S it is insane , your motors are dead no??
motors are fine. only warm.
@@quadmovr "warm at 180c" jokes what pwm frequency are you flying here tho?
what props?
FAA probably freaking out
lmao this isn't even murica
Holy shit, it's so impressive that such a small thing can have such power
Ok...you've got my attention... full specs please...🤔
no specs for you xd
@@fluoxethine Uhh. right ok
I've ran 6s on 2700kv and there's no way it was close to 200mph but that quad is a lot lighter
Im curios what prop you are using? I have a build with the F80 2200kv and every time I punch the throttle like this I flatten the props out and they crack or explode.
With my f80 1900kv on 6s I had good luck master airscrew and apc props.
use Polycarbonate props instead of glass reinforced nylon (pc is elastic and almost impossible to break) for example HQprop V1S
@@konradhryniewicki7956 All my props from 5"-7" are all HQ.
@@briangustin1085 Ill look into these again. I just want to see what this bird is capable of. Freestyles and cruises just fine, just cant full throttle it..lol
try some gemfan hurricane
It does actually hit 376 for a split second...
That’s absolutely insane! What props are you using?
Also I have the same Tmotor F80 pro’s, but when I fly them on 5 and 6S they get incredibly hot, I really can’t even fly on 6S because they don’t work right from the high temperature. How did you fix that issue?
D gain is too high
How much would you charge to build me one
i dont build for others but it would be in ballpark of 5k.
@@quadmovr 5k for an fpv drone?! my most expensive 5 inch is like 800$
@@uviolin593what do you expect?
This is a custom design and a build
Takes a few days to get it right
24 hours? $150 an hour + parts?
@ I expect him to not charge 150/hour for a drone? 💀 plus how expensive can a board be? Vtx + camera = 250, AIO lets say 150, motors 100, and whatever else I forgot (antenna, props, etc) adds up to like 800 max. I also doubt he’s charging that much
@@uviolin593 Well the parts for mine cost min $1200 if you want quality.
Plus the time and effort to build it, test, tune it.
Of course you'll be looking at big bucks. Why would you expect him to not charge $150/h? Yeah it's for a drone? it's not for a paper plane lol
Could I get this drone build ❤ ?
What is that thing????
no one:
star fighters in the middle of ohio:
Wow impressive flying with the drone. Thank you for sharing
How to build this sucker?
waaw ! witch prop you use ?
Is 160 amps per motor or total?
total.
@@quadmovr Ahh I see, what battery did you use?
lol per motor 😂😂😂😂😂😂
Per motor 4x40 ampers = 160 ampers
3.2 kilowatts on that thing? Damn
I didn't realise these speeds were possible with a quad
There's one on sale right now at Race Day Quads, for 139.99, bind n fly, just need rx. Diatone GT R349, the Guys from UAVquad channel, in austraila clocked it with a radar gun doing 118mph. That's stock parts right out of the box, no tuning either.
What prop tho???
You're lucky that he tells us it's a quad!
Not big on sharing details for some reason.
@@stevenkelby2169 Right
@@stevenkelby2169 bullshit in nearly every video he has specs in description !
all the details are in the title or description like on every video i post. always. it has a reason when something is missing. sometimes there are details i cant or im not allowed to tell.
@@quadmovr Top secret prop then?
2500kv on 6s?!? How does this thing not just fall out of the air?
lets forget my 2750kv 6s LOL
160A x 20V = 3.2kW (5 bhp)
Not at all mate if it was producing that wattage and not using it then yes , there's a little thing called efficiency . Half if that goes towards heat ! :-)
@@88Nikoli I didnt say it was producing it 😉. It's using it. But at any rate, it's a lot, considering the size of the thing.
He probably flew it los too and just had video to show the speed lol! Crazy fast 😳
i stopped flying it los when i went above 290kph.
@@quadmovr Haha! Crazy flight regardless! 👍
thanks :)
Amazing speed!! One small remark - in metric system we write "km/h" instead of "kph" (usma.org/correct-si-metric-usage)
Why are you this way, Robert
@@JonnySonder Sorry, but I don't get your anwer. I'm just saying that metric system have some rules of using it. If somebody will make a typo in your name you kindly correct him, right? Being rude was not my intention. If it was rude by pointing this "kph" thing then I'm trully sorry
I'm going to start writing it kmph.
@@LeesEBR Hmm, but why? Basically by writing kmph it looks like kilo miles per hour :)
There is very good logical reason why / character was chosen. It because it avoids confusion and scales up for any unit as you have clear separation between them. In let say meters per second you would need to write mps (m/s is correct way to write it), for centimeters per seconds it would be cmps or cps (cm/s is correct way to write it).
One of the goals of metric system was to have units the same on entire world regardless of language or region. More than 90% of world population already use metric system. Also think of km/h as two divided symbols. You don't want to put another "symbol" which is not a symbol in between as all will blend and produce mixture of symbols and words. There are many SI units and if we would like to be consistent we would have to use "per" in every context. For example one Watt is one Joule per second. To follow that "p" for "per" rule we would need to write it as W = Jps. This makes symbols unreadable as they merge together with p. W = J/s is much more readable. One Pascal or pressure (following p approach) should be written as Npm^2 instead of N/m^2. In addition it could be interpreted as Newton times pico meter squared! :) That doesn't make any sense.
That's why it's better to agree that every unit symbol division is written with "/". That's exactly what is done in SI (International System of Units - simply metric system). Also symbol for kilo is "k". Prefixes are case sensitive. "M" is mega (power plans power is in mega watts or MW), "m" is mili (medicine drug could be mili gram or mg). "k" is kilo, so the only correct way is to write velocity is: km/h (not Km/h, not KM/h, not km/hr).
@@rfly-fpv That's neat. I bet you spent a lot of time on that. I might read it while sitting on the toilet.
Hammerhart!
Weiß man die ungefähre Drehzahl der Rotoren und ob man dabei mit den Flügelspitzen an die Schallgeschwindigkeit rankommt?
Edit:
😁
Nee, hab mal grob nachgerechnet...
Bei 120mm Flügeldurchmesser müssten das dann knapp 55000 U/min sein.. 😳😲
Soooo viel ist es dann sicherlich doch nicht, ist ja schließlich keine Turbine... 😁
es sind 37-40k rpm. der bereich in dem sich der widerstand schlagartig enorm erhöht fängt schon bei mach 0.8 an. also sollten die propspitzen diesen schon nicht erreichen um nicht enorm inefficient zu werden.
Video description says it's this quad, just with other motors and maybe ESC: instagram.com/p/CJTi_8er4jW/. Did you do any aero canopy / fuselage mods or did you reach these top speeds with the air resistance inherent with this (standard'ish) frame design?
its a different quad in every part. it has a full aerodynamic shell.
@@quadmovr Now everything makes sense again :-) F80s on the way on my side, even 6052 props did not 'propel' the quad into the sweet speed range for better grip. Maybe it's the Karearea motors (2208/2150kV), maybe the ESC is not up to the task (4x45A) yet on 6S... air drag should be under control, though :-)
The f80 motors landed warm or it was cold because 2500kv with 6s ?
just warm.
@@quadmovr thx i ll try the same with cobras😉
Formula 1 pilots left the chat.
Look at that battery current :))) R.I.P the battery
Do you think you will hit the 250mph ?
“i can’t wait to go home to see my fami-“
random drone with a hand grenade attached:
I'm curious what props you use, or think are the highest speed? I've been doing the calculation for pitch and can't find many props that are geared for max speed.
two blade, high pitch. there are not many ots props for fast drones.
@@quadmovr are there any above 5 inch pitch you would recommend? I think I found a gemfan 6 inch...that was like the only one.
@@quadmovr I've been trying to figure out why biblade, since 3 blade usually has more thrust...I guess at high speed maybe cause the motor can spin it faster? But you had that one that used cine props with like 6 or 7 blades right?
@@maddercat 3 blades can never be faster than Biblade.thrust is good for acceleration not speed. 3 blades has more drag.
Dies it matter if you have dshot 600 or dshot 2400 for speedruns?
not really.
what is the all up weight of this? Can we see the design?
656,67gr. not yet, sorry. its work in progress.
150amps is crazy i can pull 50 -80 max
Does the doppler effect noticeably affect the frequency the rc control link?
I would guess not really because for the radio signal you would have to plug in lightspeed in atmosphere which would make the denominator stay closer to 1 as lightspeed is significantly higher than the quad velocity.
What parts did you use to build?
Dang, that thing's a Rocket 🤙🏻
Prop sound frequency seems to indicate it's 3-blades?
2 blade.
@@quadmovr Thank you. Determined main sound (scream, actually :-)) harmonics of props in your video to be around 1570Hz (trying to figure out Doppler effect center). If this is accurate, 2-blade rpm would be around 1570/2*60=47,100rpm. @7 pole pairs this equals 330kerpm which is well within the feasible range for ESCs.
Talking 6S and 2500kV, expected max rpm (assuming load factor of 0.75, thus voltage @ v_max = 25.2V*0.75=18.9V) is 18.9V*2500rpm/V = 54,000rpm. Prop slip introduces another factor of e.g. 0
.8, so rpm @ v_max is around 47,250 - same ball park... :-)
Speedwise, this translates into a backwards calculated prop pitch of around 375/3.6m/s/(1570Hz/2)=0.1327m=5.2". Prop slip factor taken into account, pitch needs to be somewhat higher, maybe north of 5.2"/0.8 = 6.5" at least...
5" prop size assumed, prop tip speed would be 2*PI*1570Hz/2*5"/2=313.2m/s which is very close to but still BELOW speed of sound. No hitting the sound barrier :-)
Any thoughts on these assumptions - way off or maybe baby? ;-)
Got some 5x7.5 APCs and tried to force them into their sweet spot of grip but failed (Toa Lite 2208 2150kV, 45A F3 Tekko32 ESC with some tweaked settings for timing and demag, 1300mAh 6S tattu). Felt like power limited around 130kph... :-( still working out why, e.g. it was pretty darn cold that day...
@@reinhardplietsch9707 maybe baby - your calcs are close 👍 regarding apc props, the air 'input' speed must be pretty high to get grip and to not stay in a constant stall.
@@quadmovr Great! That's what it feels like, stalled in a short circuit of airflow. Any hints what I can do to get them props passing the threshold into the sweet spot?
If it really goes 233MPH, that can kill a Dodge Demon/Hellcat...
These drones beat all the supercars in acceleration because they literally take 1 second to hit 100km/h or 60mph. Top speed matters more
@@billyshears9714 we are pretty damn close to being faster than the fastest hypercars (not including rocket cars.
it will kill most cars no problem and in the 1/4 mile theres an argument for it racing full blown drag cars and slapping it out the box basically if it was nothing to full throttle and there was a good enough fc and esc combination for that these things would be nearing slapping top fuel cars id say assuming this quad goes from no throttle to full your looking at about 4-4.1s 1/4 mile times
@@billyshears9714 the demon is electronically limited to 168 but can do 200 with some basic changes the hellcat will do 203 in its top spec so yeah both of those cars lose in top speed too.. till you change them then yeah i dont know of any hellcats that do 4s 1/4 miles (fastest quad 1/4 mile from memory) but im sure it would be a good race
Go for an 50a esc i think your maxing out your esc Maybe the motors will barly handle 50a
im not close to 180a so a 50a esc wouldnt make any difference.
you are a brother, one of the ideals in this area !!!