Engine Burn Time for Model Rockets

Video Transcript

"What I am going to talk about now is these model rocket engines like I said before there are different ratings for the model rocket engine. There is A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P each time those rockets go up it gives you basically a different thrust or they call impulse. This is a B. B's have about ten pounds of impulse, about it's you can debate that but it's the kilograms to pound I am assuming 1 to 1 conversion. Now this engine is a B44 which tell me that it's about a ten pound impulse for and it will have a little lookup table that comes with the engine package. That will tell you what time frame that is and the B4 here is about 1.1 seconds of burn. The 4 the last 4 gives you how long a tracking charge will follow before the ejection of the nose cone and the parachute for a safe recovery that last number will tell you how long it will go across, fly before it pops out the parachute. It's good to have it go over and you have got and this is without good math in front of you. You want to keep that number about a four second time frame with this type of engine they will come down to decent level and then you should be able to recover the rocket safely. Should be able to not always happen."