Michael,
They are somewhat adjustable. Don't know the max of
each one. There are many designs. A screw in the top
is all it takes to adjust the aircraft type.
It is there to protect the engine and turbo from
overboost from when the throttle gets slamed shut or
some other non-typical but occasional emergency'
event.
Marc Wiese
> From: Michael LaFleur <mike.lafleur@sbcglobal.net>
> Date: 2005/06/13 Mon PM 12:55:22 EDT
> To: "Rotary motors in aircraft"
<flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: turbo PRV's
> > Yeah, that's what I want. I know they are out
there.
> There are alot of normalized aircraft out there.
That
> may work out fine. 35 inHg is about 2-1/2 psi
boost.
> > What would a Renesis do under 2-1/2 psi boost?
Maybe
> the PRV can be found that is a couple of inches
less.
> > Mike
> > --- cardmarc@charter.net wrote:
> > > Whoooah. All serious aircraft that have turbos
have
> > a "PRV"-pressure relief valve on the intake
> > manifold, set to open a few inches above the max
> > boost level you contemplate on maintaining
> > (turbo-normalized models). They are able to
maintain
> > sl pressures in the intake at elevation, so they
are
> > referenced to know the difference. The one I'm
using
> > opens at 35", even if at 20,000 feet.
> > Marc Wiese
> > > > > > I also understand the blow-off valves are
useful
> > in car applications, where
> > > the driver will shut the throttle suddenly
after a
> > period of high boost. The
> > > turbo can not shut down so fast and the
compressed
> > air has no place to go.
> > > The valve than releases the air out to prevent
> > damage. I don't see why we
> > > need blow off valve in aircraft?
> > > Bulent
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