X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from QMTA01.westchester.pa.mail.comcast.net ([76.96.62.16] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2773784 for flyrotary@lancaironline.net; Sun, 02 Mar 2008 13:23:50 -0500 Received-SPF: none receiver=logan.com; client-ip=76.96.62.16; envelope-from=gregw@onestopdesign.biz Received: from OMTA12.westchester.pa.mail.comcast.net ([76.96.62.44]) by QMTA01.westchester.pa.mail.comcast.net with comcast id wFof1Y0080xGWP85109K00; Sun, 02 Mar 2008 18:22:44 +0000 Received: from gregoryii ([24.6.40.29]) by OMTA12.westchester.pa.mail.comcast.net with comcast id wJP61Y00D0dkeQQ3Y00000; Sun, 02 Mar 2008 18:23:10 +0000 X-Authority-Analysis: v=1.0 c=1 a=fg9n46ZHFkEA:10 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=wEsJJzKYAx66QJvcj6QA:9 a=FMdLNZEgdbFhVqFg8EvqBRhVw7MA:4 a=XF7b4UCPwd8A:10 a=YlmYnuXMjqhJ7MVrU4MA:9 a=QtVmtIO2S7Z5AuT2-W4A:7 a=wSHCHKpIXv3-tCgKBB_tHlmBC1sA:4 a=EzXvWhQp4_cA:10 a=4vB-4DCPJfMA:10 a=AfD3MYMu9mQA:10 Message-ID: <004201c87c92$c0f1a330$8801a8c0@yosemite.onestopdesign.biz> From: "Greg Ward" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Hey Ed WAs : [FlyRotary] Re: Cooling the 20B Date: Sun, 2 Mar 2008 10:25:09 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003F_01C87C4F.B10710B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_003F_01C87C4F.B10710B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks to all of you for the great input. The more time I spend on = this, the better and better this belly scoop is looking. I think the = trick will be getting the vanes and chambers designed correctly, so that = they follow the recommendations in that old WWII report and a couple of = other articles, as close as possible. Then, maybe redesigning the extra = cowls I have to see what drag reduction I can get there. Trouble is, my = math skills past a certain level suck......(:-) Time to go buy some = blue foam, and put my money where my mouth is. I will report progress = as it occurs. Thanks; Greg ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Sunday, March 02, 2008 6:45 AM Subject: [FlyRotary] Hey Ed WAs : [FlyRotary] Re: Cooling the 20B Sorry! my mistake. =20 In that case, I use two GM evaporator cores 9x11x 3 1/2" providing = approx 200 sq inch frontal area and 690 cubic inches of cooling core = volume (does on include side tanks). I consistently produce 175-180 HP = for take off and suffer a cooling deficit if OAT>60F until reaching 120 = mph IAS or I pull back on the throttle. WOT at 8500 MSL will drive = coolant/oil temps to 190F whereas cruise (approx 5500 -5600 rpm) gives a = coolant and oil temp between 160-170 depending on altitude and OAT. I = swing a 74x88 prop using a RWS 2.85:1 gear box. Ed ----- Original Message -----=20 From: Greg Ward=20 To: Rotary motors in aircraft=20 Sent: Saturday, March 01, 2008 9:20 PM Subject: [FlyRotary] Re: Hey Al was Hey Ed WAs : [FlyRotary] Re: = Cooling the 20B No, actually, I was trying to get a sense of the size of radiator I = would need. Still discussing size, and thickness. Greg ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Saturday, March 01, 2008 12:29 PM Subject: [FlyRotary] Hey Al was Hey Ed WAs : [FlyRotary] Re: = Cooling the 20B Hey Al! I believe Greg meant this question to you as my 13B installation = with rads under the cowl is not conceptually close to what Greg is = considering Ed ----- Original Message -----=20 From: Greg Ward=20 To: Rotary motors in aircraft=20 Sent: Saturday, March 01, 2008 2:41 PM Subject: [FlyRotary] Re: Cooling the 20B Hey Ed; How thick (Dimensions) is your radiator, and what size hoses are = you running? Thinking of surface mounting the feed and return lines, and = the best way to do that. Greg Ward Lancair 20b in progress ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Saturday, March 01, 2008 9:55 AM Subject: [FlyRotary] Re: Cooling the 20B I meant to attach this photo of the fan installation to the = previous post. Al ---------------------------------------------------------------------- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_003F_01C87C4F.B10710B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks to all of you for the great input.  = The more=20 time I spend on this, the better and better this belly scoop is = looking.  I=20 think the trick will be getting the vanes and chambers designed = correctly, so=20 that they follow the recommendations in that old WWII report and a = couple of=20 other articles, as close as possible.  Then, maybe redesigning the = extra=20 cowls I have to see what drag reduction I can get there.  Trouble = is, my=20 math skills past a certain level suck......(:-)  Time to go buy = some blue=20 foam, and put my money where my mouth is.  I will report progress = as it=20 occurs.
Thanks;
Greg
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Sunday, March 02, 2008 = 6:45=20 AM
Subject: [FlyRotary] Hey Ed WAs = :=20 [FlyRotary] Re: Cooling the 20B

Sorry!  my = mistake.  
 
 In that case, I use two GM evaporator = cores 9x11x=20 3 1/2" providing approx 200 sq inch frontal area and 690 cubic inches = of=20 cooling core volume (does on include side tanks).  I consistently = produce=20 175-180 HP for take off and suffer a cooling deficit if OAT>60F = until=20 reaching 120 mph IAS or I pull back on the throttle.  WOT at 8500 = MSL=20 will drive coolant/oil temps to 190F whereas cruise (approx 5500 -5600 = rpm)=20 gives a coolant and oil temp between 160-170 depending on altitude and = OAT.  I swing a 74x88 prop  using a RWS 2.85:1 gear=20 box.
 
Ed
----- Original Message -----
From:=20 Greg=20 Ward
To: Rotary motors in = aircraft=20
Sent: Saturday, March 01, = 2008 9:20=20 PM
Subject: [FlyRotary] Re: Hey = Al was Hey=20 Ed WAs : [FlyRotary] Re: Cooling the 20B

No, actually, I was trying to get a sense of = the size=20 of radiator I would need.  Still discussing size, and=20 thickness.
Greg
----- Original Message ----- =
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Saturday, March 01, = 2008 12:29=20 PM
Subject: [FlyRotary] Hey Al = was Hey=20 Ed WAs : [FlyRotary] Re: Cooling the 20B

Hey Al!
 
I believe Greg meant this question to you = as my 13B=20 installation with rads under the cowl is not conceptually = close to=20  what Greg is considering
 
Ed
----- Original Message ----- =
From:=20 Greg Ward
To: Rotary motors in = aircraft=20
Sent: Saturday, March 01, = 2008 2:41=20 PM
Subject: [FlyRotary] Re: = Cooling=20 the 20B

Hey Ed;
How thick (Dimensions) is your radiator, = and what=20 size hoses are you running? Thinking of surface mounting the = feed and=20 return lines, and the best way to do that.
Greg Ward
Lancair 20b in progress
----- Original Message ----- =
From:=20 Al=20 Gietzen
To: Rotary motors in=20 aircraft
Sent: Saturday, March = 01, 2008=20 9:55 AM
Subject: [FlyRotary] = Re: Cooling=20 the 20B

I meant = to attach=20 this photo of the fan installation to the previous=20 post.

 

Al

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