Avionics mounting | Other subsystems | Forum

I was reading the page about the amateur rocket Defiance, which is a N2O/PE hybrid like OHKLA, and saw that there's a moderate amount of detail on the avionics mounting system.  If you Ctrl-F for the phrase "It's time to start thinking about the gps telemetry system" you'll find the section I'm talking about.  Basically the electronics are mounted on a "sled" which slides into a tubular container which is inserted into the nose cone.  The avionics are put here rather than elsewhere because the nosecone is made of foam and fibreglass and hence is RF-transparent, whereas the rocket body is aluminium, which is not.  These are probably the sorts of materials we are likely to end up using and so I imagine we'll be in more or less the same boat.

This seems like a common approach.  This very detailed paper on the current Project Daedalus design shows them using a similarly shaped sled, except it's larger and made of aluminium rather than wood (due to the much higher dynamic loads of subortibal flight).

Can anybody see any problem with us basically using the same approach as in Defiance, except possibly with a metal rather than wooden sled?

I agree that it doesn't look particularly massive.  The 1kg thing on the other thread was more of a rough estimate as part of our mass model than a strict upper limit.  Obviously if we could get it under 1 kg that would be awesome, but really as long as it was under, say, 5, I'd be relatively content.  That should be easily achievable.