Question
Have you considered hydrogen instead of helium?...
*cough*
At the behest of reader Joeman, there's now a Reg forum open into which which you can throw your Low Orbit Helium Assisted Navigator (LOHAN) comments and/or suggestions. Click here for a bigger version of the LOHAN graphic We reckon this is a better place to slog it out than in comments on individual stories, because we find …
You might want to dispense with the aluminium plate. The jet thrust impinging on the plate might push the payload on its suspension cable into an unstable oscillation before the plane has had time to accelerate clear of the guide rail. Instead put a collar on the guide rail for the plane to rest against.. Or turn the aluminium plate until it's edge on to the the rocket exhaust
Does a plate behind the exhaust actually have any effect on the forward acceleration?
I remember seeing it as a physics question but can't remember which way the answer went.
I definitely think a ground test should be done to check the induced swing the platform gets before the rocket leaves it. A dangling platform takes very little to get moving....