With the fuel being Powdered sugar, KNO3, gunpowder?
It's possible, but the difficultly of launch scales with size - so keep that in mind.
Also, while it might seem appealing to make your own rocket engines, it's far easier (and probably cheaper) to buy hobby rocket engines. Commercial model rocket engines have an array of thrust and performance types, and cover a very wide range of use types. This is covered at the beginning of the Model Rockets Lesson.
Be safe, and have fun!
Select as Best AnswerUndo Best Answer
Go to the KIng of Random's page: https://www.youtube.com/watch?v=r2lDXoW78u0 and you'll see that making your own engines & rockets can be pretty easy. A five foot rocket is no big deal unless it's a BIG diameter, heavy, five footer. I've been working(off & on) a five foot Gemini replica that is very involved & trying to perfect some refined KNO3 engines. After 4 years & 22 tests I'm still on the case (I don't work on it that often!). Anyway, good luck & be careful!
Yes, you can. I built my first rocket (an Estes Alpha) in 1967, and later through their newsletters learned about rocket stability (Center of Pressure versus Center of Gravity). I did build one three feet long (a full length cardboard tube from Estes) and very long fins, using a "B" sized solid motor. The parachute was so strong that it pulled the strap out, and the rocket body glided back down by itself with no damage. So a five foot rocket can fly but maybe will need a "C" or a "D" (larger diameter) motor. As the rocket gets larger, its fins need to be larger (four fins) and maybe longer to keep the CoP behind the CoG and stay stable in flight, and its weight will increase, so a "C" sized motor will lift it but not fly too high.
Something important to keep in mind if you are building a large rocket is that you can run into a couple of issues. If your rocket diameter is very small compared to it's length you can run into stability issues. If you are going to be building large propellant grains yourself it is also probably a good idea to look into joining the Tripoli rocketry association (TRA) as they have many members who build their own rocket motors. If you want to buy large commercial motors, you will likely need to join either the NAR (National Association of Rocketry) or TRA and become certified by flying smaller rockets at sanctioned launch sites. I would also recommend going to the TRA and NAR websites to find rocketry clubs near you, as the people at these clubs have a wealth of knowledge about rockets and are usually happy to help people get into the hobby.