If you are regarding the flight of the rocket itself, one can record:
1) Maximum Altitude (apogee)
2) Speed
3) Flight time
4) Time to Apogee
5) Acceleration
There are plenty of electronic modules that can record all of this and more that are small enough to fit in a 1" Diameter bodytube.
It Can Cause The Rocket To Spin Out, and/or wobble of course
Modern model rocket fuel is a solid fuel.
If You have a powerful engine and light weight material then you could go fast.
In a real rocket, there is short a time in atmosphere and the aerodynamics are less important. In a model rocket, all flight in the atmosphere and the aerodynamics are very important. In a real rocket, it has a liquid or solid rocket engine and a large propellant mass fraction. In a model rocket, it has a solid rocket engine and a small propellant mass fraction . In a real rocket, there are four forces during atmospheric flight. In a model rocket, there are four forces throughout flight. In a real rocket, there is a long powered flight . In a model rocket, it has a very short powered flight . In a real rocket, it has passive stability and active control . In a model rocket, it has passive stability and no control. In a real rocket, it has expensive materials such as aluminum, titanium, and nickel alloy. In a model rocket, it has inexpensive materials such as balsa, cardboard, and plastic. In a real model, there is a high speed and the heating is very important. In a model rocket there is low speed and the heating is not important.
He invented the rocket in 1926
"Model rocket fuel" is basically in the form of single-shot engines. You could, I suppose, strap one to a stick and call it a "bottle rocket", but I don't think it would fly very well (and the engine would likely burn off the stick).
To keep the rocket in straight,stable flight.
It depends on what type of rocket you are building.
no
Yes, it is definitely a model rocket if you build it yourself -that's real ingenuity.
A model rocket usually only holds one engine. The size of the engine and the amount of thrust that you get from varies. Becoming apart of a model rocket organization can help you determine the right engine for your rocket.
A model rocket could hit you after launch, but the usual death threat is the possibility of a CATO (Catastrophic Failure). This usually results in the motor exploding in some manner which could blow your finger off or kill you according to the motor size. This happens very rarely, but can easily happen if you do not act safely.