Class 1 Sugar Rocket Motor - Complete DIY How To Build Rocket Engine
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- เผยแพร่เมื่อ 12 มิ.ย. 2024
- In this video, we discuss the Class 1 Model Rocket Motor specifications from the United States Government.
Then we build and launch a homemade motor that meet those specifications.
This is a complete tutorial for building our new Dart Monkey motor.
The easiest to build motor we have ever designed.
The Dart Monkey motor is a PVC case rocket motor with a simple to make sugar fuel.
When launching a Class 1 rocket and motor, you do not have to get permission from the FAA to launch.
If you're looking for a good source for Potassium Nitrate, use our affiliate link and check out Seed Ranch. If you use our link then Rotary Rocketry will make a small profit from your purchases and you still get their best pricing on any products. Thank you.
www.seedranch.com/?Click=65445
Motion Background:
• Habitación de nave esp...
▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 - Intro
0:37 - Motor Specifications
4:13 - Tripoli & NAR rules
5:20 - Parts & Supplies
10:04 - Building the motor
16:01 - Making the fuel
21:47 - Igniting the motor
22:57 - Safety
23:26 - Preparing to launch
24:12 - Rocket launch
24:48 - Finishing up - วิทยาศาสตร์และเทคโนโลยี
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bro using alamunium tube for rocket motor very good than CATO or something
and very safe
I noticed in my powdered sugar, they have added cornstarch, which can absorb water. Have you tried grinding your own sugar to see if it makes a difference in altitude or water absorbtion?
Yes, powdered sugar contains cornstarch to keep it from clumping. It is typically around 3 to 5 percent cornstarch. Cornstarch is hygroscopic which means it can absorb moisture from the air... But... It is not extremely hygroscopic so any trapped moisture should be very minimal. To answer your question... No, I have not tried grinding sugar to see if it makes any difference. My initial thought is that any difference would be very minimal and probably not even enough to notice.
Can you use anchoring epoxy to make the nozzle?
A few years ago I was making nozzles from a super strong anchoring epoxy and it worked well. I stopped using it because it was expensive and had a very short working time. For small, fast burning motors like this one, I think anchoring epoxy should work just fine.
Does your mixture scale up? For an example you want 250 of Sugar fuel it would be 162.50 of Potassium Nitrate, so on and so forth?
Sure thing. Just maintain the ratio... 65% Potassium nitrate / 17% Powdered sugar / 18% Corn syrup.
I have seen some slight variations in the ratio numbers for powdered sugar & corn syrup but this mixture has worked very well for us.
Is it safe to mix the two powered ingredients together in a Nutri-Bullet before heating together?
Although that would not likely be a problem, I would still not recommend it and it's not necessary. If the potassium nitrate is a fine powder then just put both dry ingredients into a sealed container and shake for a minute. If the potassium nitrate is large granules then use the blender on that single product first to make a fine powder.
Is there a standard or formula for determining nozzle opening? Your videos always comeback to a number 29, countless others very
There are formulas that can "help" with nozzle sizing but in my experience, you just gotta try different sizes to get it right. If you start too small, the motor explodes so you keep increasing until it doesn't explode. If you start too large and want more thrust, you keep decreasing the size until it explodes then go back to the next largest size.
sorry for all the questions, but i think this is my last one. For this exact motor casing and process, can i use the sorbitol fuel? IE 65% potassium nitrate and 35% sorbitol?
thanks
I really don't mind all the questions... They make the hobby more fun.
I have not used sorbital but I know someone who does and my understanding is that it burns a little slower than sucrose. If you change the fuel mix, you will need to do ground testing for two reasons...
1. Be sure it puts out sufficient thrust for your needs. (decrease nozzle for more thrust)
2. Be sure it does not explode. (increase nozzle for less pressure)
@@rotaryrocketry that's what i thought. Change one thing, it all changes haha.
Ill try thia fuel out. Never made it before so it kind of sketches me out because some others i know caught thier apartment on fire from making it. Probably cooking to hot
220 to 230 degrees F is all you need. Don't go any higher than that. Oh, and don't cook it over an open flame. Use an electric stove or cooktop.
@@rotaryrocketry oh for sure no open flame. I love all your videos. i have many rocket designs i have built for my J motors, but now i can make many class 1 rockets using your methods. I have purchased my eggtimer apogee. I have 3 quantums from eggtimer but i do not want to use those for this project haha.
thanks again.
Nicely done.
I didn't know Tripoli does not allow sucrose fructose or pvc.
Yeah, I understand them not allowing PVC but I don't know why they don't allow certain sugars.
I agree with PVC. Which sugars are allowed?@@rotaryrocketry
Their rules state... "sugars or sugar alcohols as primary fuel: Dextrose, Erythritol, and/or Sorbitol."
So actually, that means that you CAN have some portion of the fuel that is other sugars such as Sucrose or Fructose but those cannot be the "primary" fuel source. The fuel we make is a combination of Sucrose & Fructose so Tripoli would not allow that fuel.
the reason is, sugar alcohols have a LOWER melting point, so it is safer to work with on a stove. It melts about 225F degrees. This keeps the molten fuel far away from the ignition temperature.
@@rotaryrocketry the reason is becasue sugar alcohols melt at a much lower temperature, therefore keeping it safer to use since it is well below the ignition temperature.
Q: What did the snail say while riding on the turtle's back?
A: Wheeeeeeeeeeeeeeeeee!
Wonder *_why_* , any of the two dry ingredients of this rocket fuel need to be ground? Eventually all ingredients (under heat) being liquified are thoroughly mixed together. So, unless the pre-grinding is to make the melting process go faster, I just don't see the need for it.
I am assuming you're referring to the use of powdered potassium nitrate rather than the small ball form of potassium nitrate that you get when you buy it as stump remover. Neither of the dry ingredients actually "liquify" in this cooking process. The temperature used is not nearly hot enough for that since potassium nitrate melts at around 630F. At those kind of temperatures, the sugar ingredients would be absolutely destroyed.
For safety, you should not be cooking 'sugar' propellants on an open-element electric cooktop (or gas flame stove). Get yourself an electric skillet or an induction cooktop.
Yeah, it's on my list of things I need. Actually have a project coming up real soon that will require me to buy an electric wok so that will be my new cooking platform. I'm really careful anyways and have never had a "slip-up" with the cooktop.
i use the smae logic with some of my taxes... i owe more, meh, they dont define why so i will ignore it hahahaha
Ok, so as a lvl 2 working on lvl 3 (finished the report for TAPs a few months back) i realized that the reason for the 125g requirement as well as the 1500g total weight, is that is close to a medium bird strike for a plane.
Ok, now for my questions. I know i am a lvl 2 but something still get me thinking ahha. How did you load that beast of a motor into that rocket?
Second, how would we make an ejection charge if we dont have a flight computer? I think this would be a great video and information as some can not afford an altimeter.
thanks
I understand what you mean about "ignoring" a detail but let's be completely honest... When they say "slow burning" without providing any benchmark, who's to say what that really means.
As far as airplane impact... Well, I really hope I never find out about that with my rockets.
As for your question... Loading the motor... That motor fits very well into the 3" rocket. Here is a video about how we center and retain our PVC motors:
th-cam.com/video/X_wJkTwa2_c/w-d-xo.html
As for ejection charge... I don't like using motor based, time delay, ejection charges. I much prefer using a flight computer to detect apogee. The EggTimer Apogee altimeter is only $15. Add a battery and shipping and it comes to around $25. This is really the best way to get accurate apogee ejection. We have videos on our channel about building the EggTimer Apogee and about making an ejection charge for use with the altimeter.
@@rotaryrocketry thank you for your reply. Im going to be starting this soon. But i have heard stories about using pvc pipe. What else can i use thats just as easy and disposable?
I love your channel. And your are correct about how the government defines things hahaha
If you're looking for a "quick and easy" single-use motor, then PVC is really the way to go. We have designed our SuperMonkey motor and our DartMonkey motor to work just fine with PVC and have launched them both many times. Yes, they exploded several times in our quest for the proper nozzle size but if you build them exactly as we do, they should work fine. Always a good idea to do a motor ground test before launching in a rocket though. Really sucks to have a motor explode in the rocket and blow the fin section of your rocket to bits.
@@rotaryrocketry haha, im sure its awesome though. I literally just received a text that someone found my lvl 3 rocket in the west desert of my state. It came in ballistic a year ago and someone found pieces of it today hahahaha. Makes me sad... 8000$ in pieces
Thanks for all your help
Can it go to karman line?
On a good day?.... No.
We are building a 'sugar' propellant rocket to go to the Karman line.
th-cam.com/video/eeOVhQKnTfg/w-d-xo.html
If I was mixing that much of something that contained both fuel and oxidizer, I'd try to cover my face and my arms with cotton clothing, or better.
Bear in mind that even though it is flammable during the cooking process, it is not explosive. I always wear safety glasses and have a fire extinguisher close by. It cannot catch fire from just the cooking process, you would have to actually drop some of the fuel onto the cooktop heating element to ignite it.