RE: inflatable boats

...And there are a couple of infamous tales of folks
pressurizing the frames with N20, then "Leaking" it into the
intake.  Can't remember if that was for roundy-rounds, or
drag cars.

-Ejay 

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of
David 
> Weinshenker
> Sent: Thursday, May 06, 2004 9:33 AM
> To: [email protected]
> Subject: Re: [ERPS] inflatable boats
> 
> Jerry Durand wrote:
> > 
> > At 09:49 PM 5/5/2004, Pierce Nichols wrote:
> > >On Wed, 2004-05-05 at 21:44, [email protected]
wrote:
> > >
> > > > Good point, against your premise. I'm a boater and I

> know that an
> > > > inflatable boat has a rigid, reinforced fiberglass V

> hull under it to
> > > > take the dynamic stress.
> > >
> > >         Wrong; that's called an RIB. I was talking
about 
> the old-style fully
> > >inflatable Zodiacs. Zodiac and Avon still make them,
you know. The
> > >slamming loads on those relatively low-pressure tubes
at 
> speed are of
> > >the same order as the Shuttle's max-Q.
> > 
> > I don't know if they still do this, but some racing
motorcycles had
> > pressurized frames for additional strength/light weight.
> 
> I know I've heard of pressurized lightweight tubular
frames in some 
> racing cars, but IIRC the pressure was more for crack
detection (they 
> were up against fatigue limits, and the frames didn't last
forever) 
> than for stiffening.
> 
> -dave w
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