X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from backend1.xplornet.com ([207.179.143.200] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTPS id 1054758 for flyrotary@lancaironline.net; Fri, 31 Mar 2006 20:13:16 -0500 Received-SPF: neutral receiver=logan.com; client-ip=207.179.143.200; envelope-from=echolakeresort@telus.net Received: from echolake-cc8a26 (206-47-94-97.anikast.net [206.47.94.97]) (authenticated bits=0) by backend1.xplornet.com (8.13.1/8.13.1) with ESMTP id k2VGxQiN031441 for ; Fri, 31 Mar 2006 12:59:30 -0400 MIME-Version: 1.0 Message-Id: <442D5FEB.00000B.00592@ECHOLAKE-CC8A26> Date: Fri, 31 Mar 2006 08:59:23 -0800 (Pacific Standard Time) Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_ZI40CJD0000000000000" X-Mailer: IncrediMail (4502089) From: "Echo Lake Fishing Resort (Georges Boucher)" To: "Rotary motors in aircraft" Subject: Fw: Re: [FlyRotary] Re: Very short intake manifold length X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 --------------Boundary-00=_ZI40CJD0000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Forgot to remove background! Sorry=0D =0D -------Original Message-------=0D =0D From: Echo Lake Fishing Resort (Georges Boucher)=0D Date: 03/31/06 08:57:45=0D To: Rotary motors in aircraft=0D Subject: Re: [FlyRotary] Re: Very short intake manifold length=0D =0D Hi! Lynn=0D What kind of modifications (porting ect.) was done to get 229.4hp @ 7800R= PM. Length of exhaust & intake runners.=0D Thanks.=0D Georges B.=0D Christavia Mk 4 13bNA (dry sump) =0D =0D -------Original Message-------=0D =0D From: Hennie van Rooyen [HQP]=0D Date: 03/31/06 03:31:41=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] Re: Very short intake manifold length=0D =0D "That 173.3 HP from the dyno sheet is from an engine with a very short intake tract. It is tuned for best power at 9,400 RPM. That was 244.9 HP.= It is not tuned for 6,500 RPM. In use there is no reason to be below 7,800 R= PM and I watch the tape from each session to alert the driver is he is dragg= ing the Revs that low in some situations. We will change final drive ratios = or hold off an upshift to a different location to avoid going below 7,800 RP= M (229.4 HP)."=0D =0D Hi Lynn,=0D =0D I'm sure I'm going to be flamed for this question, but I'll reveal my ignorance by asking anyway. (I'm still a baby at this, but growing strong= er every day)=0D =0D If the rotary engine can be tuned for higher output at higher RPM, why ar= e they operated in the lower RPM range for aircraft applications even thoug= h we use PSRU's? Is it for fuel consumption, heat generation and reliabilit= y only or should I ought to know something else?=0D =0D Hennie=0D =0D -------------------------------------------------------------------------= ---- -----------=0D This e-mail is confidential and is for the addressee only.=0D Please refer to http://www.kumbaresources.com/email-disclaimer for import= ant disclaimers.=0D -------------------------------------------------------------------------= ---- -----------=0D =0D --=0D Homepage: http://www.flyrotary.com/=0D Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/=0D =20 --------------Boundary-00=_ZI40CJD0000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Forgot to remove background! Sorry
 
-------Original Message-------
 
Date: 03/31/06 08:= 57:45
Subject: Re: [FlyR= otary] Re: Very short intake manifold length
 
Hi! Lynn
What kind of modifications (porting ect.) was done to get 229.4hp @ = 7800RPM. Length of exhaust & intake runners.
Thanks.
Georges B.
Christavia Mk 4 13bNA (dry sump) 
 
-------Original Message-------
 
From: Hennie van Rooyen [HQP]
Date: 03/31/06 03:= 31:41
Subject: [FlyRotar= y] Re: Very short intake manifold length
 
"That 173.3 HP from the dyno sheet is from an engine with a very sho= rt intake tract. It is tuned for best power at 9,400 RPM. That was 244.9 = HP. It is not tuned for 6,500 RPM. In use there is no reason to be below = 7,800 RPM and I watch the tape from each session to alert the driver is h= e is dragging the Revs that low in some situations.  We will ch= ange final drive ratios or hold off an upshift to a different location to= avoid going below 7,800 RPM (229.4 HP)."
 
Hi Lynn,
 
I'm sure I'm going to be flamed for this question, but I'll reveal m= y ignorance by asking anyway. (I'm still a baby at this, but growing stro= nger every day)
 
If the rotary engine can be tuned for higher output at higher RPM, w= hy are they operated in the lower RPM range for aircraft applications eve= n though we use PSRU's? Is it for fuel consumption, heat generation and r= eliability only or should I ought to know something else?
 
Hennie
 
--------------------------------------------------------------------= ---------------------
This e-mail is confidential and is for the addressee only.
Please refer to http://www.kumbaresources.com/email-disclaimer for important d= isclaimers.
--------------------------------------------------------------------= ---------------------
 
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