X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2181665 for flyrotary@lancaironline.net; Mon, 16 Jul 2007 21:33:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id l6H1WN5i007108 for ; Mon, 16 Jul 2007 21:32:24 -0400 (EDT) Message-ID: <002301c7c812$64b5efc0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: : Duct Coordinates was : [FlyRotary] Re: Oil cooler duct. Date: Mon, 16 Jul 2007 21:32:52 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C7C7F0.DD55BA90" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C7C7F0.DD55BA90 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On its way, Rich Ed ----- Original Message -----=20 From: Richard Nadig=20 To: Rotary motors in aircraft=20 Sent: Monday, July 16, 2007 9:05 PM Subject: [FlyRotary] Re: Duct Coordinates was : [FlyRotary] Re: Oil = cooler duct. Ed, Could you send a copy of the coordinate graphs to me at my email = address? May redesign my oil cooler duct. Thanks, Rich ----- Original Message ---- From: Ed Anderson To: Rotary motors in aircraft Sent: Monday, July 16, 2007 4:42:29 PM Subject: [FlyRotary] Duct Coordinates was : [FlyRotary] Re: Oil cooler = duct. Too Late, Bobby, I calculated based on a 19" width {:>) I have sent the coordinate graphs to your e mail as they are a tad = larger than Marv permits. I had to embed them in a MS word document - = tried converting to jpeg with PaintBrush but it didn't work out. So the one with Height data is looking at the duct from the side = (assuming the core is mounted with the core face perpendicular to the = direction of flight). The Width data is looking at the duct from = top/bottom. So if you shaped a foam core to these coordinates and then = rounded the edges to smooth corners, this should give you a good duct = for your core. Things come together at the inlet around 8-9" with a 10" wide opening = and a 3" wide opening - for cosmetic reasons you could make the opening = slightly wider and height slightly less just so they give you an opening = around 30 sq inches. So that looks like about 1.5" above/below center = line for a 3" total and 5" left/right of center line for a 10" width at = about 8-10" out from the core. The streamline duct is to be preferred over my Pinched duct where = possible, but once you start getting shorter than about 6" the truncated = Streamline duct starts to show a lot of the core to the airstream and it = is my opinion the drag goes up considerably. The pinched duct is = basically a compromise duct for those with very short 3-6" duct runner = space. Hope this helps. Ed ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Monday, July 16, 2007 5:26 PM Subject: [FlyRotary] Re: Oil cooler duct. Ed, My notes say 18".=20 Bobby -------------------------------------------------------------------------= --- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Ed Anderson Sent: Monday, July 16, 2007 1:24 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Oil cooler duct. Hi Bobby, You actually have sufficient distance to probably come pretty close = to a streamline duct. Tell me how wide the core you may use from Ed - = the same 19" as the stock or different? I'll see what I can come up = with. Ed ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Monday, July 16, 2007 3:30 PM Subject: [FlyRotary] Oil cooler duct. Ed, It looks like I have about 10-12 inches of duct between the chin = scoop and oil cooler face. The cooler is a stock mazda but I am = considering a slightly larger one that Ed K. makes. 6.5" tall vs 5" Any = suggestions on how you would shape this duct using the pinched duct = approach? Thanks.... Bobby =20 ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Monday, July 16, 2007 5:26 PM Subject: [FlyRotary] Re: Oil cooler duct. Ed, My notes say 18".=20 Bobby -------------------------------------------------------------------------= --- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Ed Anderson Sent: Monday, July 16, 2007 1:24 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Oil cooler duct. Hi Bobby, You actually have sufficient distance to probably come pretty close = to a streamline duct. Tell me how wide the core you may use from Ed - = the same 19" as the stock or different? I'll see what I can come up = with. Ed ----- Original Message -----=20 From: Bobby J. Hughes=20 To: Rotary motors in aircraft=20 Sent: Monday, July 16, 2007 3:30 PM Subject: [FlyRotary] Oil cooler duct. Ed, It looks like I have about 10-12 inches of duct between the chin = scoop and oil cooler face. The cooler is a stock mazda but I am = considering a slightly larger one that Ed K. makes. 6.5" tall vs 5" Any = suggestions on how you would shape this duct using the pinched duct = approach? Thanks.... Bobby =20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. ------=_NextPart_000_0020_01C7C7F0.DD55BA90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
On its way, Rich
 
Ed
----- Original Message -----
From:=20 Richard = Nadig=20
Sent: Monday, July 16, 2007 = 9:05 PM
Subject: [FlyRotary] Re: Duct = Coordinates=20 was : [FlyRotary] Re: Oil cooler duct.

Ed, =20 Could you send a copy of the coordinate graphs=20 to me at my email address?  May redesign my oil cooler = duct. =20 Thanks, Rich

-----=20 Original Message ----
From: Ed Anderson <eanderson@carolina.rr.com&g= t;
To:=20 Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent:=20 Monday, July 16, 2007 4:42:29 PM
Subject: [FlyRotary] Duct = Coordinates was=20 : [FlyRotary] Re: Oil cooler duct.

Too Late, Bobby, I calculated based on a 19" = width=20 {:>)
 
I have sent the coordinate graphs to your e = mail as they=20 are a tad larger than Marv permits.  I had to embed them in a MS = word=20 document - tried converting to jpeg with PaintBrush but it didn't work = out.
 
So the one with Height data is looking at the = duct from=20 the side (assuming the core is mounted with the core face = perpendicular to the=20 direction of flight). The Width data is looking at the duct from=20 top/bottom.  So if you shaped a foam core to these coordinates = and then=20 rounded the edges to smooth corners, this should give you a good duct = for your=20 core.
 
Things come together at the inlet around 8-9" = with a 10"=20 wide opening and a 3" wide opening - for cosmetic reasons you could = make the=20 opening slightly wider and height slightly less just so they give you = an=20 opening around 30 sq inches.   So that looks like about 1.5" = above/below center line for a 3" total and 5" left/right of center = line for a=20 10" width at about 8-10" out from the core.
 
The streamline duct is to be preferred over my = Pinched=20 duct where possible, but once you start getting shorter than about 6" = the=20 truncated Streamline duct starts to show a lot of the core to the = airstream=20 and it is my opinion the drag goes up considerably.  The pinched = duct is=20 basically a compromise duct for those with very short 3-6" duct runner = space.
 
 
Hope this helps.
 
Ed
----- Original Message -----
To: Rotary motors in aircraft
Sent: Monday, July 16, 2007 = 5:26=20 PM
Subject: [FlyRotary] Re: Oil = cooler=20 duct.

Ed,
 
My notes say 18".
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Monday, July 16, 2007 1:24 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Oil cooler=20 duct.

Hi Bobby,
 
You actually have sufficient distance to = probably come=20 pretty close to a streamline duct.   Tell me how wide the = core you=20 may use from Ed - the same 19" as the stock or different?  I'll = see=20 what I can come up with.
 
Ed
 
 
----- Original Message ----- =
From: = Bobby J. Hughes
To: Rotary motors in aircraft
Sent: Monday, July 16, 2007 = 3:30=20 PM
Subject: [FlyRotary] Oil = cooler=20 duct.

Ed,
 
It looks like=20 I have about 10-12 inches of duct between the chin scoop and oil = cooler=20 face. The cooler is a stock mazda but I am considering a slightly = larger=20 one that Ed K. makes. 6.5" tall vs 5" Any suggestions on how = you=20 would shape this duct using the pinched duct = approach?
 
Thanks....=20 Bobby 
 
 
----- Original Message -----
To: Rotary motors in aircraft
Sent: Monday, July 16, 2007 = 5:26=20 PM
Subject: [FlyRotary] Re: Oil = cooler=20 duct.

Ed,
 
My notes say 18".
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Monday, July 16, 2007 1:24 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Oil cooler=20 duct.

Hi Bobby,
 
You actually have sufficient distance to = probably come=20 pretty close to a streamline duct.   Tell me how wide the = core you=20 may use from Ed - the same 19" as the stock or different?  I'll = see=20 what I can come up with.
 
Ed
 
 
----- Original Message ----- =
From: = Bobby J. Hughes
To: Rotary motors in aircraft
Sent: Monday, July 16, 2007 = 3:30=20 PM
Subject: [FlyRotary] Oil = cooler=20 duct.

Ed,
 
It looks like=20 I have about 10-12 inches of duct between the chin scoop and oil = cooler=20 face. The cooler is a stock mazda but I am considering a slightly = larger=20 one that Ed K. makes. 6.5" tall vs 5" Any suggestions on how = you=20 would shape this duct using the pinched duct = approach?
 
Thanks....=20 Bobby 
 
 
 

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