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From: "Jonathan Crawford" <servious@servious.org>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: normalized supercharger? Was Re: Is common sense dead (rant mode on)
Date: Mon, 13 Jun 2005 09:11:35 -0500
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I'd have to argue the point about unloading the blower. Quite a few factory
as well as aftermarket Whipple and Eaton setups use bypass valves between
the outlet and inlet without problem. It is about the only way to keep it
from boosting at idle aside from a clutch, in theory you can also regulate
the boost with the bypass valve, since by just cracking it a little you will
bleed down the pressure between the two sides to attain the amount of boost
you are looking for. The plus side to a supercharger (as well as a turbo) is
that even if they do fail, with most failure modes you still have your
engine... Maybe with less power, but still enough to keep you airborne long
enough to get to an airport.

Jonathan

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Michael LaFleur
Sent: Monday, June 13, 2005 5:51 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: normalized supercharger? Was Re: Is common sense
dead (rant mode on)

Oh my, did I say that? I was thinking turbo.

There is no wastegate, but there could be a clutch.
But that is another failure point.

Mike L.

--- Michael LaFleur <mike.lafleur@sbcglobal.net>
wrote:

> Oops, I've been called out!
> 
> Having just come up with the idea lately, I hadn't much about the 
> installation. My inclination would be to electronically control the 
> wategate and have a popoff valve set a a couple psi over 1 atm.
> 
> Mike L.
> 
> --- Russell Duffy <13brv3@bellsouth.net> wrote:
> 
> > I will have a normalized Renesis, supercharged. 
> >  
> > Hi Mike,
> >  
> > How were you planning to normalize with the supercharger?
> >  
> > I'm planning to put either a supercharger (what
> I'd
> > prefer), or another
> > turbo (shut up John <g>) on the RV-3, somewhere
> down
> > the road.  One of the
> > drawbacks to the supercharger is the lack of boost control.  I asked 
> > the ATI guys about controlling the boost via a valve on
> the
> > outlet of the blower,
> > but they said not to do that because it was bad to unload the 
> > blower.
> >  
> > You can certainly control boost via throttle opening, and perhaps 
> > you can even do it via engine computer almost like a sort
> of
> > rev limit.  What's your
> > plan?  
> >  
> > Cheers,
> > Rusty (no flying today, due to work that sucks)
> >  
> >  
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:  
> http://lancaironline.net/lists/flyrotary/List.html
> 


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