Return-Path: Received: from [206.228.212.23] (HELO mail.statesville.net) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 499786 for flyrotary@lancaironline.net; Fri, 05 Nov 2004 07:48:24 -0500 Received-SPF: none receiver=logan.com; client-ip=206.228.212.23; envelope-from=twjames@statesville.net Received: from TWJames [63.162.171.178] by mail.statesville.net with ESMTP (SMTPD32-8.13) id A6CB7FB00142; Fri, 05 Nov 2004 07:49:15 -0500 From: "Tommy James" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] cowl on Date: Fri, 5 Nov 2004 07:48:00 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005A_01C4C30B.C5E82B00" X-Mailer: Microsoft Office Outlook, Build 11.0.6353 Thread-Index: AcTDA0j7Te3Bze2EQRitDRvnnB3VqwAMeOiA X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Message-Id: <200411050749519.SM02356@TWJames> X-RBL-Warning: REVDNS: This E-mail was sent from a MUA/MTA 63.162.171.178 with no reverse DNS entry. X-RBL-Warning: SPAMHEADERS: This E-mail has headers consistent with spam [4000020e]. X-Declude-Sender: twjames@statesville.net [63.162.171.178] X-Note: Scanned for Spam This is a multi-part message in MIME format. ------=_NextPart_000_005A_01C4C30B.C5E82B00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Very nice looking workmanship, Al! I am envious! Those temps look somewhat high for the power level you reported, but flight tests will be the key indicator of cooling success. :-) Tommy<>< _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Friday, November 05, 2004 1:45 AM To: Rotary motors in aircraft Subject: [FlyRotary] cowl on I did the first "post-cure" of the custom cowl today:-), that is, first runs with cowl on; and the faired spinner. The big high for the day was finding that the negative pressure created by the prop, even at low rpm, drew significant cooling air through the radiator in the cowl and out the back. Previous runs without the cowl had me convinced that I would need an auxiliary fan for idle and taxi time. First indication I had was with the prop only at 700 rpm, I put my hand in front of the rad intake scoop and was surprised at the amount of air flow going in. I did simulated taxi and stop running; a bit over 2000 on the engine for a while, then some 1600, then some 2000; for about 10 minutes. Temps got up to 200 on the oil and 195 on the coolant, and were pretty steady there. It was a 70 degree day, so it may not work on a 90 degree day; but I was very pleased. I also think it is going to give me clean airflow into the prop. (and I liked the way it looked, the third photo is the stock cowl for a Lyc). It's these bright spots that keep us going on these projects. Al (stock Lyc - Nyet! Rotory - Da!) ------=_NextPart_000_005A_01C4C30B.C5E82B00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Very nice looking workmanship, = Al!  I am envious!

Those temps look somewhat high for = the power level you reported, but flight tests will be the key indicator of = cooling success. J

Tommy<><

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Friday, November = 05, 2004 1:45 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] cowl = on

 

I did the first “post-cure” of the = custom cowl todayJ, that is, first runs = with cowl on; and the faired spinner.  The big high for the day was finding = that the negative pressure created by the prop, even at low rpm, drew significant = cooling air through the radiator in the cowl and out the back.  Previous = runs without the cowl had me convinced that I would need an auxiliary fan for = idle and taxi time.  First indication I had was with the prop only at = 700 rpm, I put my hand in front of the rad intake scoop and was surprised at the = amount of air flow going in. 

 

I did simulated taxi and stop running; a bit over = 2000 on the engine for a while, then some 1600, then some 2000; for about 10 minutes.  Temps got up to 200 on the oil and 195 on the coolant, = and were pretty steady there. It was a 70 degree day, so it may not work on a 90 = degree day; but I was very pleased.  I also think it is going to give me = clean airflow into the prop.

(and I liked the way it looked, the third photo is = the stock cowl for a Lyc).

 

It’s these bright spots that keep us going on = these projects.

 

Al (stock Lyc – Nyet!     = Rotory – Da!)

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