[SS-VehDev] Re: composite short stack/instrumentation section

[Lakestake Rocketry]

Richard,

I put a question to Bill that I have not heard back an answer on.

I guess it really should have been addressed to you.

The other rocket Bill referred to has an O.D. of 250mm. I can
go back and re-design it if the SS2S rocket must use a different
mandrel. I don't want to purchase two mandrels just a few tenths
different.

What are the requirements for the SS2S casing? Can it work
with the mandrel I was going to acquire, or do you have specific
requirements for this project?

The current design calls for a 244mm core.

Matt C

On 10/4/05, william colburn <space1space at sbcglobal.net> wrote:
>
> Matt, Colin,
>
> This is both an introduction and a request to forge
> ahead on the 40 inch length of 10 inch composite tube.
> Matt has a mandrel or will have (for another personal
> project he is doing) and requires some aid in
> designing a hand-layup tube with a minimum of 41 ksi
> hoop and 21 ksi longitudinal strength in a .188
> nominal wall thickness.
>
> He will be using simple techniques and readily
> (?)available materials.
>
> Colin is an expert in this field and it is hoped can
> steer us in the right dfirection to get our goal.
>
> Included in this fabrication effort will be the
> incorporation of end closures which use a minimum of
> tube length but can endure the full longitudinal
> stress under maximum expected pressure.
>
> We will test this item to perhaps 1200 psi to validate
> its ability to operate with a MEOP of 800 psi.
>
> At this point thermal resistance is not the main
> criterion. We can always incorporate ablatives or
> internal insulation depending on the location for the
> use of the tube material (casing or instrument
> housing)
>
> Richard may well have some inputs too so belay any
> effort until you have an all clear from him.
>
> I am away for the next few days (Conference on
> Biologic Processes in Space.....shame on you for that
> thought:)
>
>
> BC
>
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