X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-05.southeast.rr.com ([24.25.9.104] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2183032 for flyrotary@lancaironline.net; Tue, 17 Jul 2007 12:59:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.104; 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-05.southeast.rr.com (8.13.6/8.13.6) with SMTP id l6HGwi7b028433 for ; Tue, 17 Jul 2007 12:58:45 -0400 (EDT) Message-ID: <001901c7c893$ce3d2590$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Duct Coordinates was : [FlyRotary] Re: Oil cooler duct. Date: Tue, 17 Jul 2007 12:59:14 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C7C872.46E8D740" 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_0016_01C7C872.46E8D740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mailed it to you direct, TJ. Its right at the limit for the list. Ed ----- Original Message -----=20 From: Thomas Jakits=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 17, 2007 12:29 PM Subject: [FlyRotary] Re: Duct Coordinates was : [FlyRotary] Re: Oil = cooler duct. If the file is not too big, please mail it to the list.. ....or a copy to my email, if you don't mind: thjakits@gmail.com THanx, TJ On 7/16/07, Richard Nadig wrote: 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 < eanderson@carolina.rr.com> To: Rotary motors in aircraft =20 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=20 Subject: [FlyRotary] Re: Oil cooler duct.=20 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=20 Subject: [FlyRotary] Oil cooler duct.=20 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=20 Subject: [FlyRotary] Re: Oil cooler duct.=20 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=20 Subject: [FlyRotary] Oil cooler duct.=20 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_0016_01C7C872.46E8D740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Mailed it to you direct, TJ.  Its right at = the limit=20 for the list.
 
Ed
----- Original Message -----
From:=20 Thomas Jakits
Sent: Tuesday, July 17, 2007 = 12:29=20 PM
Subject: [FlyRotary] Re: Duct = Coordinates=20 was : [FlyRotary] Re: Oil cooler duct.

If the file is not too big, please mail it to the=20 list..

....or a copy to my email,  if you don't mind: thjakits@gmail.com

THanx,
TJ

On 7/16/07, Richard=20 Nadig <blueren@yahoo.com>=20 wrote:
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 <=20 eanderson@carolina.rr.com>
To: Rotary motors in aircraft = <flyrotary@lancaironline.net>
Sent: = Monday, July 16,=20 2007 4:42:29 PM
Subject: [FlyRotary] Duct Coordinates was : = [FlyRotary]=20 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=20 they are a tad larger than Marv permits.  I had to embed them = in a MS=20 word document - tried converting to jpeg with PaintBrush but it = didn't work=20 out.
 
So the one with Height data is looking at = the duct=20 from the side (assuming the core is mounted with the core face = perpendicular=20 to the 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=20 your core.
 
Things come together at the inlet around = 8-9" with a=20 10" wide opening and a 3" wide opening - for cosmetic reasons you = could make=20 the 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"=20 above/below center line for a 3" total and 5" left/right of center = line for=20 a 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=20 is basically a compromise duct for those with very short 3-6" duct = runner=20 space.
 
 
Hope this helps.
 
Ed
-----=20 Original Message -----
From:=20 Bobby J.=20 Hughes
To:=20 Rotary motors in aircraft
Sent:=20 Monday, July 16, 2007 5:26 PM
Subject:=20 [FlyRotary] Re: Oil cooler duct.

Ed,
 
My=20 notes say 18".
 
Bobby

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

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

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

Ed,
 
My=20 notes say 18".
 
Bobby

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

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

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

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l
=



Bored stiff? Loosen up...
Download and play hundreds of games for free on = Yahoo!=20 = Games.
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