[SS-VehDev] Re: Ameron filament wound tubing

[william colburn]

Extra weight would kill the mission, likely. The drag
off the slight ridges is probably far less a penalty
than the extra weight of an external airframe. (the
ripples are perhaps .005 in height, consistent, and
blended with with surface.)

BC

--- Lakestake Rocketry <lakestake at gmail.com> wrote:

> Good morning,
> 
> One of the down sides to fabricating our own
> airframe was that it would
> be prohibitively expensive in composite materials to
> get the strength
> needed for the motor casing.
> 
> If these tubes are so darned ugly what about using
> them as engine
> casings only and building a lovely composite
> airframe over them?
> They strength of the airframe would add a margin of
> safety to the
> motor casings and the reduced pressure requirements
> would make
> a composite airframe again attractive financially.
> 
> Matt
> 
> P.S.  If it wasn't for the ridges we could use the
> engine casing as
> the mandres for the airframe...
> 
> On 11/23/05, Rich Nakka <richnakka at rogers.com>
> wrote:
> >
> > Bill,
> > I urge that we get two 24' sticks rather than 20'
> sticks. The extra 4' can
> > be cut off one of them, and used for the
> short-stack motor (40" needed).
> > The second extra length can be used for a
> hydro-static test of the tubing
> > to destruction. Part of it can also be used for
> materials testing.
> > If we only get two 20' sections, we have no
> material to do testing with,
> > which could put us at a serious disadvantage.
> >
> > Richard
> > -------------
> >
> > william colburn wrote:
> >
> > The sample is in today. As I suspected from
> > discussions and the online foto, the color is an
> ugly
> > brownish green. But the surface is quite smooth, a
> > good point. It does have slight ripples which do
> not
> > seem apparent at a 3.5 inch diameter but might be
> > worse on the 10 inch tube.
> >
> > I have requested a quote for two 20 foot sticks
> > (shortest we can get) of the Ameron 3200A 10 inch
> > nominal pipe.
> >
> > We need to establish a shipping address. I suppose
> one
> > would certainly go to Canada, eh Rich?
> >
> > BC
> >
> >
> >
>