X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.245] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5542002 for flyrotary@lancaironline.net; Mon, 14 May 2012 14:03:52 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.245; envelope-from=bhughes@qnsi.net X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" Subject: RE: [FlyRotary] Re: Possible cooling solution? MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CD31FB.D6B5B230" Disposition-Notification-To: "Bobby J. Hughes" Date: Mon, 14 May 2012 13:03:16 -0500 Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F33F620A@qnsi-mail.qnsi.net> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Possible cooling solution? Thread-Index: Ac0x98vI9bs7Q4HNQZ6l8pfa0UIzSgAAiItQ References: From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01CD31FB.D6B5B230 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I suspected it might be the opposite of our tractor aircraft. Bobby =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Charlie England Sent: Monday, May 14, 2012 12:33 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Possible cooling solution? =20 I'm not sure I'd get too excited about a top exit. Yes, it will cool down faster after shutdown, but that's not the real goal. There's a lot of 'pressure recovery' (pressure is going *up*) when you get to the rear of something that resembles an airfoil. Thorp T-18's have the cabin cooling inlet at the base of the rear of the sliding canopy, & they will part your hair in the back. I managed to find this image of Pushy Galore (2nd fastest Reno F-1 racer at the time). Note the rather hard to see cooling inlet, about 1/2 chord at the wing root. Also, here's a web page by an EZE builder who did his homework. http://x-jets.com/downdraft_cooling.html Charlie On 05/14/2012 11:31 AM, Lehanover@aol.com wrote:=20 Since you are moving your inlet to the bottom have you considered a top exit? Is the top cowl area close to the prop in low pressure? I'm sure your turbo provides plenty of extra heat during ground operations.=20 Bobby =20 Plus you get faster cool-down from chimney effect. Air intakes in high pressure areas work great. In low pressure areas, not at all, or flow backwards. Surface mounted intakes require the flow be attached ahead of the intake to function. So, a few vortex generators often do the trick. The scoop style operating in undisturbed air will work perfectly. =20 Lynn E. Hanover =20 In a message dated 5/14/2012 11:58:33 A.M. Eastern Daylight Time, cbarber@texasattorney.net writes: >=20 >=20 > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On > Behalf Of Chris Barber > Sent: Monday, May 14, 2012 10:38 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Possible cooling solution? >=20 > Don't laugh, while I think mine should be a bit more elligant, that is > similar to my mods=20 >=20 > I can hopefully make it pretty later. :-) >=20 > Chris.=20 >=20 > Sent from my iPhone 4 >=20 > On May 14, 2012, at 9:37 AM, "Bill Bradburry" =20 > wrote: >=20 >> Chris, >>=20 >> this is a cooling solution that seems to work. >>=20 >> B2 >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =09 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 ------_=_NextPart_001_01CD31FB.D6B5B230 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I suspected it might be the opposite of our tractor aircraft. =  Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Charlie England
Sent: Monday, May 14, 2012 = 12:33 PM
To: Rotary motors in aircraft
Subject: = [FlyRotary] Re: Possible cooling = solution?

 

I'm not sure = I'd get too excited about a top exit. Yes, it will cool down faster = after shutdown, but that's not the real goal.

There's a lot of = 'pressure recovery' (pressure is going *up*) when you get to the rear of = something that resembles an airfoil. Thorp T-18's have the cabin cooling = inlet at the base of the rear of the sliding canopy, & they will = part your hair in the back.

I managed to find this image of Pushy = Galore (2nd fastest Reno F-1 racer at the time). Note the rather hard to = see cooling inlet, about 1/2 chord at the wing root.

Also, here's = a web page by an EZE builder who did his = homework.


http://x-jets.com/downd= raft_cooling.html


Charlie

On 05/14/2012 11:31 AM, Lehanover@aol.com wrote: =

Since you are moving your = inlet to the bottom have you considered a top exit? Is the top cowl = area close to the prop in low pressure? I'm sure your turbo = provides plenty of extra heat during ground = operations. 
Bobby

 

Plus you get faster cool-down = from chimney effect. Air intakes in high pressure areas work great. In = low pressure areas, not at all, or flow backwards. Surface mounted = intakes require the flow be attached ahead of the intake to function. = So, a few vortex generators often do the trick. The scoop style = operating in undisturbed air will work = perfectly.

 

Lynn E. = Hanover

 

In a message dated 5/14/2012 = 11:58:33 A.M. Eastern Daylight Time, cbarber@texasattorney.net = writes:

> =
>
> -----Original Message-----
> From: Rotary motors = in aircraft [mailto:flyrotary@lancaironlin= e.net] On
> Behalf Of Chris Barber
> Sent: Monday, May = 14, 2012 10:38 AM
> To: Rotary motors in aircraft
> Subject: = [FlyRotary] Re: Possible cooling solution?
>
> Don't laugh, = while I think mine should be a bit more elligant, that is
> = similar to my mods
>
> I can hopefully make it pretty = later. :-)
>
> Chris.
>
> Sent from my iPhone = 4
>
> On May 14, 2012, at 9:37 AM, "Bill = Bradburry" <bbradburry@bellsouth.net>=
> wrote:
>
>> Chris,
>>
>> = this is a cooling solution that seems to work.
>>
>> = B2
>> <prop2.jpg>
>> --
>> = Homepage:  http://www.flyrotary.com/
>&= gt; Archive and UnSub:
> http:= //mail.lancaironline.net:81/lists/flyrotary/List.html
> =
> --
> Homepage:  http://www.flyrotary.com/
> = Archive and UnSub:
> http:= //mail.lancaironline.net:81/lists/flyrotary/List.html
> =
> --
> Homepage:  http://www.flyrotary.com/
> = Archive and UnSub:   http:= //mail.lancaironline.net:81/lists/flyrotary/List.html

--
Ho= mepage:  http://www.flyrotary.com/
Archi= ve and UnSub:   http:= //mail.lancaironline.net:81/lists/flyrotary/List.html

 

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