lcorinth
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- Aug 5, 2014
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I'm about to build my second scratch rocket, and I'm not sure when it's appropriate to go from a 1/8 to a 3/16 inch launch rod.
The rocket will launch with a D12 motor - actually, it's two stages, with a D12 for the booster, and an E9 for the sustainer, but since the rocket will have cleared the rod when the second stage ignites, I feel like that might not matter. I have both sizes of launch lugs, and rods. I'd stick with the smaller size, but I don't know if it's recommended. When do you know you need to go to 3/16? When do you go up to 1/4?
The rocket will launch with a D12 motor - actually, it's two stages, with a D12 for the booster, and an E9 for the sustainer, but since the rocket will have cleared the rod when the second stage ignites, I feel like that might not matter. I have both sizes of launch lugs, and rods. I'd stick with the smaller size, but I don't know if it's recommended. When do you know you need to go to 3/16? When do you go up to 1/4?