It depends on the letter. the smallest ones begin with an A. As they get bigger they go B,C,D,E,F......... all the way to Z. To find how big of an engine you need look on the back of the box.
The smaller ones are about 3/8 wide x 2 inches long, up to the E size which are about 1.25 inch wide and 4 inches long.
100ft
any just make sure it balances (not to big.)
it the same size as a areoplane engine but a bit bigger and much faster
the motor/engine =)
big rocket
The engine on the plane is not as strong and big as the rocket Also the pressure could destroy the plane into pieces
The 350 Rocket from the olds is Far superior. I just put one in my Grand Prix switched from the 350 Chevy and with a 4 barrel holly carb you will notice a BIG difference.
The Big Day - Rocket Power - was created in 2004.
A big one, but that will also be blown in any transient winds, so you have to compromise.
At present it looks to be the Saturn V model made or sold through Apogee components. It is under 63" tall and is a 1/70th scale model.(check the related link)
Depends on model year and engine.
about as big as Columbus's ship