From my old model rocketry experience, while you want the CG ahead of the CP, you don't want it *too* far ahead or else the rocket will tip into cross-air currents (e.g., wind) excessively. The rule of thumb was CG ahead of CP by the diameter of the rocket, Anyway, love your channel and content. Keep it up!!
@@alpha_pixel_ still applies though, think about how both are simply moving through a fluid. you just want to avoid feedback loops once the rocket is tipped off axis
@@alpha_pixel_ Mmm, that's a personal opinion, but I kind of thing it is much more complex than this. That's what could be called an 'interface vehicle'. Meaning that traveling at the same time in interaction with several (two) types of elements (here fluids, liquid and air). Which one has the upper hand? As in F1, aerodynamics impact parts which are also in contact with the ground. But the opposite is also true. That would be the same for a sailing boat, that could be seen a a blend between a wing and a boat, the with the added complexity which is to deal with other interactions, as when the wind blows, the waves tend to be higher, meaning that the scenario changes as the 'envelope' does, and the design should accomodate for these changes. Not an easy task! Best regards!
Angle the outer edges of the sponsons, this will help prevent the rolling over. I used to race gas rc hydroplanes. This was a trick to get them to turn fast without rolling over.
What a beautiful place the UK can be. If it were a pond or lake similar to this in Texas you may find all types of trash and fishing worm containers laying around.
Fun idea. With the reaction time requirements of these things (they sure don't wait about), maybe you'd be better off with some sort of IMU based active stabilization/control than a strict RC?
You could try making the planing surfaces tapered so that they become thinner as the boat lifts out of the water so that it is less jumpy because it appears your getting an oscillation that increases until it torpedos
Fantastique! Il y a de quoi étudier dans ce domaine! Les propulseurs ont juste la puissance qu'il faut pour le gabari de l'engin. La stabilité a haute vitesse n'est pas facile a obtenir et c'est très intéressant a étudier !
been waiting for this one! Awesome project I feel like some sort of thrust vectoring system on a larger scale model could help with stability and be really fun to design and make. Just an idea.
Your larger motor test at 04:25 performed well, even managing to go the full 'Donald Campbell' on you. You hit a ripple; he caught his wake on his return run. The effect was the same. Great video - and yes, bigger is always better.
Was really hoping one would disappear under the water only to rocket up in the air like a submarine launched missile. Orange gaining sentience was equally entertaining though lol
I love the inventive nature of your videos, shows you how simple it can be to create some great toys with a little knowledge and a creative mind. Great video - keep them coming!
that orange one decided it was too cold in the water and came back home...lol 7:48 I think is amazing that those rocket engines develop thrust under water
Yes definitely at least a 3 moter r/c just need steering maybe some way to adjust plain might help don’t think 🤔 it needs to be much bigger though great vid nice to see you all having fun with primative power I had so much fun putting those rockets or cars literally so many years ago
When we were kids about 40 years ago. We started out with model battle ships placed a rocket motor in the back . Of course it didn't work Then we went to my father's cabinet shop and built boats out of wood. It actually worked!! Really enjoyed watching your video
I love the simple design. You should use the hulls as sponsons for a larger boat. Multiple rocket engines would be interesting, but probably impossible to balance the thrust.
I love how the orange one wanted back out of water. It knew enough to know that the water is dangerous. Lakes are fine but, as I always say, never go to sea, especially not in a boat, because ship happens.
Small ripples behaved like massive waves at that scale. Increased scale will for sure be better. Also a T tail with trim tabs to adjust level / angle of attack at high speed would help.
Bigger boat and even bigger rocketengine! Maybe you should include there little bit electronics and make a gyro stabilization system in all 3 axis. A Goal would be to get straight line and more speed. I also recommend to make front ”skis” bottom v-shaped to make them less responsive to little waves.
I say a multi stage version would be sweet. And yes, radio controlled. And maybe a couple of discarding/ejecting side boosters. Eh, basically a Saturn V & Space Shuttle hybrid but with a rudder.
Speaking of Rapier, I'm glad to see that a new company has started making similar motors. Rapier could no longer export (as of 2010) as a result of the Czech authorities inappropriately touching the rules and reclassifying them as "fireworks".
@@noahluppe oh I didn't know about that . But can you explain in detail that which kind of motors are prohibited (electrical, chemical) and if someone or some companies wants to experiment for good how can they achieve .
@@rishabhguptarg Without license the production of any explosive is prohibited, wich applies for solid rocket motors. For liquid or hybrid motors other laws might apply, like restrictions for compressed gas oxidizers, without owning the proper licenses.
@@rishabhguptarg If I know something from germany "applying for a license" is not just sending in a form or sth. Here you have to attend licensed courses to be able to get the qualification for similar things. And it does cost some money.
so you honestly ASK us if you should make a much bigger version of a rocket motor powered and radiocontrolled boat? like what do you think people say? "oh please no save us from another boring video!" ??? lol. of course you will make a bigger version of that. 🤣
For this hydroplane design, you may be able to get more reliable onset of planing behavior by putting two thin cheek pieces on the wedges so any trapped air can't escape out the sides. The cheeks or side-walls would basically force any air in front of the sponson wedge to go under it; the only water drag you would incur would be the two thin side walls slicing through the water. Same with the wedge under the boat itself; sidewalls may help force any air in front of the wedge to go under the body, causing the onset of planing to happen more reliably. Could you try that and see if putting sidewalls on the wedges improves the onset of planing? I'm curious to see if that works.
Our racing riggers use two CF tubes, fore and aft. This prevents them from twisting, which is what appeared to happen in the first run when it avoided the retrieve boat. That would also keep it running in irregular circles as it did. Also, cg is important. It should balance slightly behind the rear edge of the front sponsons. On a 24 inch boat about 1 inch back. And a fixed rudder at the rear will help with tracking also. Keep at it!
0.9 N = 0.0917 kg, just short of 100 g. I think you misspoke at 0:45 when you said "about a kilogram of thrust." TSP L-4 motors have an average thrust of 0.9N. I wish we could have these sweet low-thrust, long-burn motors in the US. Envy.
Absolutely make a bigger one with either bigger motors... or just multiple small motors. What would be cool would be to have some sort of sequencing on the ignition of the motors in order to build up the thrust over a few seconds; it might reduce the chances of submarining! Either way, just do it - this 60 year old kid wants to see what happens!!!
You can also account for the bounce by increasing the length a bit, increasing the sponson spacing slightly more outward and tapering the sponsons a bit more.
That is so cool, hydro rockets, but my opinion is " why the motor(rocket) is under the water , i know that they are waterproof but that causes unnecessary underwater combustion that affects rockets performance ,just try one's again with rockets exhaust out ofthewater" maybe the results may different 😉
So happy to see your channel taking off, man! I've been watching off and on for a couple years, and your content quality has just gone through the roof! Keep it up, man! Hello from Oklahoma, USA
Try this simple expedient: make the bottom of your rear planing surface a trifle wider and a slightly inverted V bottom. This forces the water-which always wants to escape from the bottom of the boat sideways (the shortest route) without planing the boat, to keep moving aft and to continue lifting the boat. If it does go sideways, it has to travel downward thus lifting that way as well. This is based on the old Hickman Sea Sled principle which has yet to be improved on.
Absolutely love your version of a sub-surface Polaris missile launch! I expect that I'll be viewing/re-viewing... this like any 2 year-old would. lol This is even better than shiny objects!
Explore boats on underwater wings. There was quite lot of those used in river navigation of USSR. It also has 3 points of contact with water but under water. It gives better stability because there is no surface that causes transients while boat touching and detouching it.
Makes you think about those old speed boat world record attempts that often resulted in loss of life. Water is definitely fighting against you here, and even with perfect aim for some point, the waves will alter the course. You'd need to have steering but how in the world can steer from the beach something that fast and that sensitive to small waves?
Your stability problems are the result of launching the boat with the current of the water perpendicular to the boats center line. Those tiny ripples are large to that tiny boat. So it causes a rolling motion until one sponson is completely out of the water. The opposite sponson is levered down into the water, increasing drag on one side. Thus slowing that side and inducing yawing motion. The solution for the tiny boats would be to launch the boat parallel to the current. So, yourself on a boat anchored out in the middle, I would suggest launching into the current so the tiny boats would float back toward you.
you really need to try to launch these boats again but parallel to the coastline of the river. If the current and the waves are hitting the boats from the side it affects the boats stability way more .
Poor James can't manufacture Rockets, luckily in Portugal nobody cares
😭😭😭
Aqui no Brasil até tem legislação, mas não fiscalização, então... 😂
lol, meanwhile here in india, you can buy oxidiser from street vendors
who cares
@@brain8484 sakma does
From my old model rocketry experience, while you want the CG ahead of the CP, you don't want it *too* far ahead or else the rocket will tip into cross-air currents (e.g., wind) excessively. The rule of thumb was CG ahead of CP by the diameter of the rocket, Anyway, love your channel and content. Keep it up!!
This is a boat. Not rocket. Also not going up.
@@alpha_pixel_ still applies though, think about how both are simply moving through a fluid. you just want to avoid feedback loops once the rocket is tipped off axis
@@alpha_pixel_ fluid dynamics pretty much covers going up, going down and going through, liquids and gases.
@@alpha_pixel_ Mmm, that's a personal opinion, but I kind of thing it is much more complex than this. That's what could be called an 'interface vehicle'. Meaning that traveling at the same time in interaction with several (two) types of elements (here fluids, liquid and air). Which one has the upper hand? As in F1, aerodynamics impact parts which are also in contact with the ground. But the opposite is also true. That would be the same for a sailing boat, that could be seen a a blend between a wing and a boat, the with the added complexity which is to deal with other interactions, as when the wind blows, the waves tend to be higher, meaning that the scenario changes as the 'envelope' does, and the design should accomodate for these changes. Not an easy task! Best regards!
@@alexandregrynagier1762 physics are a personal opinion? Interesting 🤔☺️
Nice to see you continuing with your submarine project here. I'd never thought of rocket submarines, though.
You should definitely light a bunch of those at a pool party... If you are accepting the fact they are probably never gonna invite you again.
@@qofiagya4891 bruh
pool parties in england (now)?
no pool parties in England, you prat
@@qofiagya4891 this sexbot is never gonna get invited to any party
@@nou5440 I just invited it to the reported comments party
Angle the outer edges of the sponsons, this will help prevent the rolling over. I used to race gas rc hydroplanes. This was a trick to get them to turn fast without rolling over.
Two things I would like to to see you trying: how slow can you fly a plane, and a project like the Nemeth Parasol. That was a very curious concept.
You should check out rctestflight cause he did a multi-winged design that could go fairly slow (he also crashed it lol)
@@hotmailcompany52 thanks for the hint
@@MrLuisMartins666 Its called "Best STOL Wing Desing Ever?!?" and is here ruclips.net/video/Rc7PcmAl7Ag/видео.html
What a beautiful place the UK can be. If it were a pond or lake similar to this in Texas you may find all types of trash and fishing worm containers laying around.
yo this is heaps cool
Fun idea. With the reaction time requirements of these things (they sure don't wait about), maybe you'd be better off with some sort of IMU based active stabilization/control than a strict RC?
You could try making the planing surfaces tapered so that they become thinner as the boat lifts out of the water so that it is less jumpy
because it appears your getting an oscillation that increases until it torpedos
Fantastique! Il y a de quoi étudier dans ce domaine! Les propulseurs ont juste la puissance qu'il faut pour le gabari de l'engin. La stabilité a haute vitesse n'est pas facile a obtenir et c'est très intéressant a étudier !
been waiting for this one! Awesome project
I feel like some sort of thrust vectoring system on a larger scale model could help with stability and be really fun to design and make. Just an idea.
I have an unopened packet of Rapier L-4 motors from the good old days of making free flight planes, I think I've just been inspired!
Thumbs up.
Love your vids, but this was the most fun I’ve had watching and it looks like the most fun you’ve had making a video. Well done!
Your larger motor test at 04:25 performed well, even managing to go the full 'Donald Campbell' on you. You hit a ripple; he caught his wake on his return run. The effect was the same.
Great video - and yes, bigger is always better.
When do you start building rockets for SpaceX?
There’s a huge gap between solid and liquid rocket engines 😅
He could build the frames
Was really hoping one would disappear under the water only to rocket up in the air like a submarine launched missile. Orange gaining sentience was equally entertaining though lol
How do you only have 190k subs?? You’re content is awesome keep it up man 👍
Could be the hair? Maybe the makeup????
@@BIGWIGGLE223 tf wrong with you?
I love the inventive nature of your videos, shows you how simple it can be to create some great toys with a little knowledge and a creative mind. Great video - keep them coming!
The orange one was the best because its orange 😂.
Very fun project mate 🔥
Not sure if something like an insta360 go is on the budget, but i think one of them attatched to the boats would make great footage :)
I trusted on your reply thatyou will make this,and iam not dissapointed at allat the finished product , you always amaze me
Good to see Donald Campbell, Leo Villa and the Norris brothers got the design right 👌
that orange one decided it was too cold in the water and came back home...lol 7:48
I think is amazing that those rocket engines develop thrust under water
Oh these boats were soo entertaining!! 🤣🤣
Yes definitely at least a 3 moter r/c just need steering maybe some way to adjust plain might help don’t think 🤔 it needs to be much bigger though great vid nice to see you all having fun with primative power I had so much fun putting those rockets or cars literally so many years ago
When we were kids about 40 years ago.
We started out with model battle ships placed a rocket motor in the back .
Of course it didn't work
Then we went to my father's cabinet shop and built boats out of wood.
It actually worked!!
Really enjoyed watching your video
Wow, that’s amazing. I liked the white one though, it went straightforward.
Make a HUGE orange one that is rc controlled
Those things are cool lol that orange one was awesome
Are you mad...just print it out for my desk top!! 😅😆👍
I'm buying some rocket motors 😁
And yes buddy rc rocket 🚢
I love the simple design. You should use the hulls as sponsons for a larger boat. Multiple rocket engines would be interesting, but probably impossible to balance the thrust.
I love how the orange one wanted back out of water. It knew enough to know that the water is dangerous. Lakes are fine but, as I always say, never go to sea, especially not in a boat, because ship happens.
the orange boat going rogue got me rolling!
Small ripples behaved like massive waves at that scale. Increased scale will for sure be better. Also a T tail with trim tabs to adjust level / angle of attack at high speed would help.
Nice work!
Props for the safety cutaway 👍
Bigger boat and even bigger rocketengine! Maybe you should include there little bit electronics and make a gyro stabilization system in all 3 axis. A Goal would be to get straight line and more speed. I also recommend to make front ”skis” bottom v-shaped to make them less responsive to little waves.
Bigger and RC all the way!
Absolutely loved the bit at 7:38.
That was epic, do a bigger one.
I am old enough to know better but I am a big kid at heart 😂 rocket sub be funky
I say a multi stage version would be sweet.
And yes, radio controlled.
And maybe a couple of discarding/ejecting side boosters.
Eh, basically a Saturn V & Space Shuttle hybrid but with a rudder.
Definitely wanna see a part two with maybe a much bigger/ wider dual rocket boat. This was a ton of fun to watch though!
Very fun and exciting video!
I can't wait for the jet engine powered hydro plane sounds safe :)
maybe using a gyroscope or a compas with one servo on the helm to keep it in a straight direction could work
LOVE FROM INDIA BROTHER ❤️❤️
Great vid I'd love to see a RC version.
Thanks for sharing the files! It'll be a fun little print for our pond?
Speaking of Rapier, I'm glad to see that a new company has started making similar motors.
Rapier could no longer export (as of 2010) as a result of the Czech authorities inappropriately touching the rules and reclassifying them as "fireworks".
I love ur rocket powered things! Pls continue!
Totally uncontrolled - loved it.
Keep making videos like this we can’t wait please
This is so entertaining man just seeing a boat turning into a torpedo so funny
Can you make your own propellant and your own thrust engine like integza did. Btw love from India
Under UK law it is prohibited to manufacture your own motors
@@noahluppe oh I didn't know about that . But can you explain in detail that which kind of motors are prohibited (electrical, chemical) and if someone or some companies wants to experiment for good how can they achieve .
@@rishabhguptarg Without license the production of any explosive is prohibited, wich applies for solid rocket motors. For liquid or hybrid motors other laws might apply, like restrictions for compressed gas oxidizers, without owning the proper licenses.
@@noahluppe it is very strict their that's means. I think project air should apply for the license
@@rishabhguptarg If I know something from germany "applying for a license" is not just sending in a form or sth. Here you have to attend licensed courses to be able to get the qualification for similar things. And it does cost some money.
Well done young man! Love your adventurous attitude and experimental nature!!
New rocket boat sounds good.
so you honestly ASK us if you should make a much bigger version of a rocket motor powered and radiocontrolled boat? like what do you think people say? "oh please no save us from another boring video!" ??? lol.
of course you will make a bigger version of that. 🤣
Well of you have to make it RC!! Haha
Awesome vid, waiting on the next!!
For this hydroplane design, you may be able to get more reliable onset of planing behavior by putting two thin cheek pieces on the wedges so any trapped air can't escape out the sides. The cheeks or side-walls would basically force any air in front of the sponson wedge to go under it; the only water drag you would incur would be the two thin side walls slicing through the water. Same with the wedge under the boat itself; sidewalls may help force any air in front of the wedge to go under the body, causing the onset of planing to happen more reliably.
Could you try that and see if putting sidewalls on the wedges improves the onset of planing? I'm curious to see if that works.
Our racing riggers use two CF tubes, fore and aft. This prevents them from twisting, which is what appeared to happen in the first run when it avoided the retrieve boat. That would also keep it running in irregular circles as it did. Also, cg is important. It should balance slightly behind the rear edge of the front sponsons. On a 24 inch boat about 1 inch back. And a fixed rudder at the rear will help with tracking also. Keep at it!
Finally, a tiny update on bluebird
0.9 N = 0.0917 kg, just short of 100 g. I think you misspoke at 0:45 when you said "about a kilogram of thrust." TSP L-4 motors have an average thrust of 0.9N. I wish we could have these sweet low-thrust, long-burn motors in the US. Envy.
We are working on it.
Absolutely make a bigger one with either bigger motors... or just multiple small motors. What would be cool would be to have some sort of sequencing on the ignition of the motors in order to build up the thrust over a few seconds; it might reduce the chances of submarining! Either way, just do it - this 60 year old kid wants to see what happens!!!
You can also account for the bounce by increasing the length a bit, increasing the sponson spacing slightly more outward and tapering the sponsons a bit more.
RC the heck out of those rocket boats!
Make a fin for the front running along the bottom, should help with the wild turns and break some of the ripples
That is so cool, hydro rockets, but my opinion is " why the motor(rocket) is under the water , i know that they are waterproof but that causes unnecessary underwater combustion that affects rockets performance ,just try one's again with rockets exhaust out ofthewater" maybe the results may different 😉
So happy to see your channel taking off, man! I've been watching off and on for a couple years, and your content quality has just gone through the roof! Keep it up, man!
Hello from Oklahoma, USA
Thanks!
It would be a 1 channel rocket powered water craft. What could go wrong? So yes make that😂😂😂
this is so cool
yes build an RC version 😎😎
7:44 That's when it became sentient
This is awesome! A nice engineering progression on the boats too.
Wow! nice job! :D Make a 10 way race xD and light them all at once :D
I love how you show Bluebird as an example but not the bit where it fails miserably.
Yes, for radio control. Also... Wait for it... Two stage rocket!
tip: add suspension to do better on the waves
"Make a new boat" or "Make a U-Boat"? Did I mishear that? Could get interesting! Keep up the good work!
The Orange boat was just angry. First attacking the Nippy Shippy, before turning it's anger to its creator. Amazing video, I laughed 'till I cried.
Try this simple expedient: make the bottom of your rear planing surface a trifle wider and a slightly inverted V bottom. This forces the water-which always wants to escape from the bottom of the boat sideways (the shortest route) without planing the boat, to keep moving aft and to continue lifting the boat. If it does go sideways, it has to travel downward thus lifting that way as well. This is based on the old Hickman Sea Sled principle which has yet to be improved on.
Wow rocket fuel? I would've never guessed that rocket ran on RP-1 and Liquid oxygen!
Loved this video!
Cool. Yes the idea of more improvements is the way to go.
Absolutely love your version of a sub-surface Polaris missile launch! I expect that I'll be viewing/re-viewing... this like any 2 year-old would. lol This is even better than shiny objects!
Yes, do a bigger one!
Explore boats on underwater wings. There was quite lot of those used in river navigation of USSR. It also has 3 points of contact with water but under water. It gives better stability because there is no surface that causes transients while boat touching and detouching it.
Makes you think about those old speed boat world record attempts that often resulted in loss of life. Water is definitely fighting against you here, and even with perfect aim for some point, the waves will alter the course. You'd need to have steering but how in the world can steer from the beach something that fast and that sensitive to small waves?
Your stability problems are the result of launching the boat with the current of the water perpendicular to the boats center line. Those tiny ripples are large to that tiny boat. So it causes a rolling motion until one sponson is completely out of the water. The opposite sponson is levered down into the water, increasing drag on one side. Thus slowing that side and inducing yawing motion. The solution for the tiny boats would be to launch the boat parallel to the current. So, yourself on a boat anchored out in the middle, I would suggest launching into the current so the tiny boats would float back toward you.
VERY GOOD 👍👍👍 🇧🇷 muito bom
That was great. Was fun to see the audience reactions!
Perfect idea for making this
These fish had a hell of a day when you let those bad boys loose.
you really need to try to launch these boats again but parallel to the coastline of the river. If the current and the waves are hitting the boats from the side it affects the boats stability way more .
Kerbal Space Progream Part 2 !!!!!!
oh and yes please bigger version :-)
Fantastic work, James! Pretty fun little boats!!! 😃
Stay safe there with your family! 🖖😊
Huge lake. Could potentially go anywhere. Decides to attack you 😂.
It’s almost like you could make a sort of submarine with those rockets lol
I know this day would come
Rockets + boats, sounds like a good idea!