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Date: Mon, 13 Jun 2005 11:25:47 -0700 (PDT)
From: Michael LaFleur <mike.lafleur@sbcglobal.net>
Subject: Re: [FlyRotary] Re: turbo PRV's
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Marc,

It needs to be big enough to vent a lot of ait if
you're at sea level. I need this for mormalizing. I'm
sure these can do it though as they are in use for
that function.

I forgot about pressure losses in the intake, etc. I
bet 35" ought to be just about right.

Mike LaFleur

--- cardmarc@charter.net wrote:

> 
> 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
> > > 
> > > 
> > > >>  Homepage:  http://www.flyrotary.com/
> > > >>  Archive:  
> > >
> http://lancaironline.net/lists/flyrotary/List.html
> > > 
> > 
> > 
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:  
> http://lancaironline.net/lists/flyrotary/List.html
> > 
> 
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:  
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>