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From: <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: RV -7A Cooling Update 8/6/07
Date: Tue, 7 Aug 2007 14:17:26 -0500
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Dennis,
Looking at your pictures, I think your inlet is too close to the hub of the propeller. Canard guys have done some testing (maybe others too) and shown that the faster you go, the area around the center of the prop acts like a flat disk.  If you look at the Lopresty  speed cowlings, the inlets are at the maximum outward on the cowling.
On pusher aircraft tests have shown that the air is being pushed inside the cowling, instead being sucked out.
Buly
Still watching you :)
> > > > Any comments - Am I out to lunch on this one?
> > > >
> > > > PS. The end of the first paragraph in Ch. 12.2. states  "We shall consider first the
> > > > simple case of parallel inflow at an angle *alpha* to the *tubes*, as shown in Fig. 12.6"
> > > > I have not found a consideration in Chapter 12 of the case of the *fins* being at
> > > > an angle *alpha*.
> > > >
> > > > Dennis Haverlah