Thanks all for your thought,
Rocket Star, when i simmed it up i can fit an L935 in their if i go drogue-less at apogee. Will that cover it
(but seriously it probably will only ever break mach once or twice in its lifetime, high thrust K motors are far too expensive for me to use more than once or twice) Most of the time the rocket will be in the transonic region and the glass would be done more so that it doesn't shatter on impact with the ground as opposed to the high stresses induced during flight (most of the time it will be running on 38's or high 29's).
But it might just be on the safe side to do it (plus it would give me some practice in something new).
Thanks Marty Monsta it gives me a bit more confidence if somone else is thinking along the same lines. What weight glass will be using for your build? I cant wait to see how it comes along
Well OTT the build equipment is probably the limiting factor in this enterprise. If i do decide to build it (which is more like when i get the money) i would have to purchase all of the fiberglassing equipment plus the glass some new epoxy (not sure what sort to use but will have to look into it) plus the phenolic. Now i haven't done any maths but im not 100% sure that that will be cheaper than the fibreglass tubes blake already sells.
If the premade fiberglass tubes were cheaper then i definitely would use them over phenolic to make the thing bullet proof but i chose phenolic purely based on its price (im a bit of a tight wad). I like the idea of keeping it in tension, but in saying that phenolic is much better in compression isn't it (but then if you glass it then its a composite so we can get fiber pull out etc in tension... a very tough decision indeed).
I had a thought this morning of using a fiberglass booster section and then the nosecone and av bay arrangement make in phenolic as it wont have the same amount of force on it but also needs investigating. the only issue i would have with a MD retainer is i will be running a wide range of motor diameters and lengths and that could be difficult to adapt for but nothing is too hard right
Drew, could be another option to look at, i was thinking of buying some glass from bunnings and giving it a try on some smaller tubes first to get the hang of this so that i could do a bigger tube easier but the sleeves might be an easier option.
a glassing workshop would be a great idea, hopefully i will be able to squeeze some time away from uni and give it a try.
Thanks for all the help everyone, i just had one more concern i would like to raise...
Canards.. are they the devils spawn when it comes to cert and mach plus flights or can their issue with developing there own trajectory during flight be easily rectified.
I thought perhaps that you could mount them through the wall like the rear fins by using some kind of inner stuffer tube and a couple of centering rings but in my design they are in a shocking place right on top of the av bay. i could reduce the av bay to a 54mm tube and mount the fins to the switch band but i dont really want to after having some space issues with my current av bay design.
Does any one else have any good ideas or past solutions that have worked effectively??