Re: Air Scoops

["Al Gietzen" <alventures@email.msn.com>]

I think if someone did the pressure distribution analysis (hello, Velocity)
you would find that the pressure above and below the wing near the trailing
edge (and presumably also the strake) would be pretty much the same.  It is
true for other high performance aircraft.  Also on the top of rear portion
of the fuselage and the cowling are probably fairly high pressure areas.  To
wit: those NACA scoops that folks are putting up there for vent air work
real well.

Al Gietzen
-----Original Message-----
From: Schweitzer, Bill <bill.schweitzer@tandem.com>
To: 'Velocity Reflector' <reflector@awpi.com>
Date: Monday, June 08, 1998 5:35 PM
Subject: RE: Air Scoops


>I've also thought about this.  There was an article & picture in a Central
>States (about January) that had a top-scoop LongEZ.  It didn't look too bad
>and it certainly had straight air flow.
>
>The question for me is: this moves the scoop from a high pressure area to a
>low pressure area and the top seems to be more critical for smooth flow.
>Does someone out there know more about the physics here?
>
>Bill Schweitzer
>std RGE
>San Jose, Ca
>
>> -----Original Message-----
>> From: Dave Black [SMTP:asterisk@idsonline.com]
>> Sent: Monday, June 08, 1998 4:16 PM
>> To: denism@erols.com; Reflector 3
>> Subject: Re: Air Scoops
>>
>> Denis,
>>
>>
>> > Does anyone have any experience / advice on installing air scoops on
the
>> top
>> > cowling so that the air stream can be directed straight into the
>> cylinder
>> > heads / plenum?
>>
>> Given the engine-cooling problems on pushers, I believe you are on the
>> right
>> track. I believe the Factory originally chose not to put cooling scoops
on
>> top
>> primarily because it would look funny. But if you're willing to accept
the
>> aesthetics, I believe it will cool better. My plane already has its
armpit
>> scoops, or I'd install the cooling inlets on top.
>>
>>
>> Dave Black
>> ShortWing RG Classic (TopDoor)
>