3:00 in, if not mentioned already , raise your tool bit up to center, and slide bit back into holder for less overhang to cut down on vibration ..... love seeing old Logans? in action.....hope this helps, Paul
Awesome, the project is coming along great, I actually flew the motor last summer, I've just been behind in making videos. Just uploaded the next one on casting the grains.
using cutoff wheel on aluminum will clog it and cause to get out of balance and explode, never use any grinding wheel on aluminum [stationary, or portable] use sanding discs......for a saver result.....hope this helps.....Paul
hey mate any chance your making these for sale, been making some rockets with the kids and tiring off the pvc pipe.. would be interested in a couple or if you have cad file or specs so i can send off to get made ( for a price )
I am not making them for sale, but you can get similar graphite nozzles from binderdesign.com/store/Fisher-Research.html or lokiresearch.com/secure/store.asp?groupid=5520031443530
Not for the nozzle. The gasses coming out of the motor are much hotter than the melting point of aluminum. If you want to keep weight down a little bit you can use titanium for sugar fuel nozzles. It is harder to machine and more expensive though.
The nozzle dimensions depend on a lot of things like the type of propellant, the exposed area of the grains, and the grain geometry. For my motor I used a simulation spreadsheet from Richard Nakka's website. You can see the process I used in Part 1 in the video series about the design. Richard Nakka's spreadsheet is at www.nakka-rocketry.net/softw.html.
Hey man, need a bunch of help here. I have been making sugar rocket but keeps on failing. My problem is that it keeps on exploding. And as to why it keeps on exploding was because of unbalanced ratio of the length of the motor and the nozzle size. The build-up press was too strong, and the nozzle size was not big enough for the pressure to thrust out so much that the steel pipe can't hold and just exploded. My last experiment was 4 feet steel pipe 3 inch for the nozzle and 3 inch for the tip The total length of the motor was 3 and a half feet. The motor was casted seperately, 6 inch per motors, total 7 motors. I motor core was 10mm diameter hollow out. The nozzle too was 10mm in diameter. The size of the steel pipe was 2inch in diameter. Man, the explosion was loud and the shockwave was strong. I could really need a help. If i used 1 feet long motor, how many mm of nozzle should i used? If it's 2 feet long, how many mm of nozzle how i used? The list goes on... Now i am currently building 3 feet long steel pipe. 3 inch for nozzle and 3 inch for the tips. 2 and half feet for the motors. The core of the motors are hollow out with 12mm The nozzle is 18mm Will it work? Or is the nozzle still to small? If we can talked personally through social media, that would be great. Maybe Whatsapp of Facebook
You need to do a simulation to get the correct nozzle size for your motor. Go to www.nakka-rocketry.net/softw.html and download the SRM software. Also if your motor is too long the propellant will erode causing explosion. Also I do not recommend using steel as it is frangible and can cause injury, aluminum is much better.
Good point. My lathe doesn't have a large enough pass-through chuck for that rod and I didn't really want that much hanging over. Probably could have made it work though.
hello!! I made your engine design and also the recipe for your fuel, I am very close to doing the tests but I have some doubts, do you have any contact so I can talk to you? Thank you best regards.
Hello. I'm probably pretty limited in what I can share beyond what are in the videos, but you can email me at minuterockets@gmail.com. Unfortunately I'm pretty busy lately with life so it might take some time for me to get back to you.
Man this sucks! If I had a lathe I could make anything but I don't have one so here's something to try: graphite powder + sodium silicate and some sort of mold
no advantage using stainless, more expensive and harder to machine, use regular steel or 12L14 leaded stock for easier machining. Melting points are all the same with steels
Thanks for the comment. The main advantage for me of the stainless is more about corrosion resistance than heat resistance. That's true regular steel will work just fine, just have to be quick and thorough about the cleanup after each flight and use a light coat of machine oil to prevent rust.
The voice narration is sounding like sleepy, not enthust, mumbling, like afraid speak clearly, making me not want to listen. Was he trying to make asmr?
Hi, the stuff is really cool! I will say since the war criminal Putin invaded peaceful Ukraine, the ukrainians have shown so much ingenuity developing & "MacGyvering" weapons to defend themselves... The US HIMARS rocket has been really helpful to them but, I'd have to think something hobby grade could have Chief the same thing (albeit without having access to the US military encrypted L5 GPS BAND)... We all should put together some guidelines for them to produce their own version of HIMARS GMLRS Rockets! *Have you ever tried building a rocket that has nosecone fins controlled with servos and RC?
Looking for the next video! Very interesting to see the manufacturing process of this nozzle. I've seen them on books only...
Thanks! I appreciate the feedback. I just uploaded the next video.
Wow, you are doing amazing work! Waiting for your next video!
Thanks! I've been away for a while, but I just uploaded the next video.
Best rocket series!
Thanks!
3:00 in, if not mentioned already ,
raise your tool bit up to center,
and slide bit back into holder for less overhang to cut down on vibration .....
love seeing old Logans? in action.....hope this helps, Paul
Thanks for the tips! It's a Craftsman, which I think is the same as an Atlas for the time.
Great Videos! Any more in the pipeline! Really liked the machining aspects!
Hey David, thanks! I just uploaded one on the propellant, hoping to do more machining videos in the future.
Perfect because now I can make one of my own. Thanks
I’ve been looking for a video exactly like this. Thank you
Take my sub
Looking forward to seeing you cast a grain. Thanks
Hey Jackson, just uploaded it, enjoy!
How is the project going on ? I've machined my motor yesterday and it's definitely more exciting, although harder, than what it seems
Awesome, the project is coming along great, I actually flew the motor last summer, I've just been behind in making videos. Just uploaded the next one on casting the grains.
nice video 👍
What stainless steel are you using for nozzles. Are you using Grade 304 or something like that?
This nozzle is made from 303 Stainless Steel.
Very neat!!
You need to lube abrasive wheel for aluminium. Wax or soap work well as it stops the aluminium binding up.
Awesome, thanks for the tip!
A little bit of beeswax will help when cutting aluminum. It won't clog up as bad.
using cutoff wheel on aluminum will clog it and cause to get out of balance and explode, never use any grinding wheel on aluminum [stationary, or portable] use sanding discs......for a saver result.....hope this helps.....Paul
2:50 tuck the cutting tool in closer too :)
Why not chuck the bar in the lathe and use a parting tool to get the lemgth you need
Would that be possible to have a copy of the parts design !!!
Thanks
Yes, the plans I used in the video are at minuterockets.com/downloads.php
very cool videos !!
hey mate any chance your making these for sale, been making some rockets with the kids and tiring off the pvc pipe.. would be interested in a couple or if you have cad file or specs so i can send off to get made ( for a price )
I am not making them for sale, but you can get similar graphite nozzles from binderdesign.com/store/Fisher-Research.html or lokiresearch.com/secure/store.asp?groupid=5520031443530
keep this up!!!
Thanks, had to step away for a bit, getting back into it now.
What is this machine that is used for holding and filing/cutting metal called?
I used an angle grinder to cut off the blank from the steel rod, and I used a lathe to do the cutting/shaping of the nozzle.
@@MinuteRockets okay thanks. Just started making aluminium based nozzle with steel throat section. I might need these tools soon
Great stuff! But vacuum, don't blow chips into the ways etc.
Can aluminum be used instead of steel? To make it lighter
Not for the nozzle. The gasses coming out of the motor are much hotter than the melting point of aluminum. If you want to keep weight down a little bit you can use titanium for sugar fuel nozzles. It is harder to machine and more expensive though.
r u manually machining??? or is this run by a cnc?
I am manual machining, I do not have a CNC lathe.
How did you calculate the dimensions of the nozzle?
The nozzle dimensions depend on a lot of things like the type of propellant, the exposed area of the grains, and the grain geometry. For my motor I used a simulation spreadsheet from Richard Nakka's website. You can see the process I used in Part 1 in the video series about the design. Richard Nakka's spreadsheet is at www.nakka-rocketry.net/softw.html.
Hey man, need a bunch of help here. I have been making sugar rocket but keeps on failing. My problem is that it keeps on exploding. And as to why it keeps on exploding was because of unbalanced ratio of the length of the motor and the nozzle size. The build-up press was too strong, and the nozzle size was not big enough for the pressure to thrust out so much that the steel pipe can't hold and just exploded.
My last experiment was
4 feet steel pipe
3 inch for the nozzle and 3 inch for the tip
The total length of the motor was 3 and a half feet.
The motor was casted seperately, 6 inch per motors, total 7 motors.
I motor core was 10mm diameter hollow out.
The nozzle too was 10mm in diameter.
The size of the steel pipe was 2inch in diameter.
Man, the explosion was loud and the shockwave was strong.
I could really need a help.
If i used 1 feet long motor, how many mm of nozzle should i used?
If it's 2 feet long, how many mm of nozzle how i used? The list goes on...
Now i am currently building 3 feet long steel pipe.
3 inch for nozzle and 3 inch for the tips.
2 and half feet for the motors.
The core of the motors are hollow out with 12mm
The nozzle is 18mm
Will it work? Or is the nozzle still to small?
If we can talked personally through social media, that would be great. Maybe Whatsapp of Facebook
You need to do a simulation to get the correct nozzle size for your motor. Go to www.nakka-rocketry.net/softw.html and download the SRM software. Also if your motor is too long the propellant will erode causing explosion. Also I do not recommend using steel as it is frangible and can cause injury, aluminum is much better.
@@MinuteRockets can alluminium hold the internal air pressure produce by the burning of the motor better than steel?
Why didn't you cut the length with your lathe? The cut off wheel on ss seems a bit much.
Good point. My lathe doesn't have a large enough pass-through chuck for that rod and I didn't really want that much hanging over. Probably could have made it work though.
hello!! I made your engine design and also the recipe for your fuel, I am very close to doing the tests but I have some doubts, do you have any contact so I can talk to you? Thank you best regards.
Hello. I'm probably pretty limited in what I can share beyond what are in the videos, but you can email me at minuterockets@gmail.com. Unfortunately I'm pretty busy lately with life so it might take some time for me to get back to you.
❤
would you like to share the pdf case design? I am very grateful
I'm working on getting them up where they can be downloaded.
cut of disk 1mm ultra thin
yes they cut alum
How much does it cost to build the motor...?
Can't really put a number on it, depends on a lot of things.
Next video please
You got it!
where are you man
I've been away for a while, things have been crazy. I just uploaded the next video.
Man this sucks! If I had a lathe I could make anything but I don't have one so here's something to try:
graphite powder + sodium silicate and some sort of mold
People have also cast nozzles out of Dhuram's Rock Hard Putty. There are also some castable ceramics I've wanted to try.
no advantage using stainless, more expensive and harder to machine, use regular steel or 12L14 leaded stock for easier machining. Melting points are all the same with steels
Thanks for the comment. The main advantage for me of the stainless is more about corrosion resistance than heat resistance. That's true regular steel will work just fine, just have to be quick and thorough about the cleanup after each flight and use a light coat of machine oil to prevent rust.
The voice narration is sounding like sleepy, not enthust, mumbling, like afraid speak clearly, making me not want to listen. Was he trying to make asmr?
Thanks for the feedback. Yeah a lot of these I had to narrate late at night after he kids are in bed so I was pretty tired. Not going for asmr.
Can you make it and send it?
Hi, the stuff is really cool!
I will say since the war criminal Putin invaded peaceful Ukraine, the ukrainians have shown so much ingenuity developing & "MacGyvering" weapons to defend themselves...
The US HIMARS rocket has been really helpful to them but, I'd have to think something hobby grade could have Chief the same thing (albeit without having access to the US military encrypted L5 GPS BAND)...
We all should put together some guidelines for them to produce their own version of HIMARS GMLRS Rockets!
*Have you ever tried building a rocket that has nosecone fins controlled with servos and RC?
Thanks, I have not tried to build a rocket with controlled fins. My rockets go straight up only.