Getting started on a 2 stage, probably G to F motors. 2.5" diameter.
Wondering what is good practice or what people have done for locating the rail buttons. Should they be only on one stage or both? I'm accustomed to a single stage having an upper button near the CG and a lower button at the butt end. However, on this preliminary design my initial CG is in the upper stage.
Not sure if there's a pitfall that I don't see with having buttons on both sections? I can't imagine it somehow twisting and locking on the rail.
Also, for simplicity sake I want to use friction fit and upper stage thrust for separation. Any reason why I should reconsider shear pins and separation charge? Both stages will have their own altimeters and recovery devices.
Advice from those with experience greatly appreciated!
Wondering what is good practice or what people have done for locating the rail buttons. Should they be only on one stage or both? I'm accustomed to a single stage having an upper button near the CG and a lower button at the butt end. However, on this preliminary design my initial CG is in the upper stage.
Not sure if there's a pitfall that I don't see with having buttons on both sections? I can't imagine it somehow twisting and locking on the rail.
Also, for simplicity sake I want to use friction fit and upper stage thrust for separation. Any reason why I should reconsider shear pins and separation charge? Both stages will have their own altimeters and recovery devices.
Advice from those with experience greatly appreciated!