The motors are identified by a series of letters and numbers such as:G64-4WWhere:G - is the motor's total impulse classification letter (in Newton Seconds) - More Details64 - is the average impulse of the motor (in Newtons - divide by 10 to obtain an approximate value of the average thrust in kg - in this case, the value would be 6.4 kilograms).4 -...

 The numbers on a motor, eg C or K, equate to a certain 'class' of total impulse. The larger the letter, the larger the impulse or thrust.Total Impulse (Ns)Equivalent Motor Class0.00 - 1.25½A ¼A1.26 - 2.50A2.51 - 5.00B5.01 - 10.00C10.01 - 20.00D20.01 - 40.00E40.01 - 80.00F80.01 - 160.00G160.01 - 320.00H320.01 - 640.00I640.01 - 1280.00J1,280.01...

Solid rocket motors use one of two types of fuel; AP or BP.Ammonium Perchlorate, APAmmonium Perchlorate is a High Powered Rocketry fuel, manufactured by Aerotech and Cesaroni.AP motors are available in two types; reloadable and single use, details of which can be found on the motor types page.AP Motors require certain licenses, and we won't sell mo...