Return-Path: Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 499772 for flyrotary@lancaironline.net; Fri, 05 Nov 2004 06:47:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=atlasyts@bellsouth.net Received: from [66.156.228.243] by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041105114629.RDVH8988.imf16aec.mail.bellsouth.net@[66.156.228.243]> for ; Fri, 5 Nov 2004 06:46:29 -0500 User-Agent: Microsoft-Entourage/10.1.4.030702.0 Date: Fri, 05 Nov 2004 06:45:45 -0500 Subject: Re: [FlyRotary] cowl on From: Bulent Aliev To: Rotary motors in aircraft Message-ID: In-Reply-To: Mime-version: 1.0 Content-type: multipart/alternative; boundary="B_3182481948_9914400" > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3182481948_9914400 Content-type: text/plain; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable On 11/5/04 1:45 AM, "Al Gietzen" wrote: > I did the first =B3post-cure=B2 of the custom cowl todayJ, that is, first run= s > with cowl on; and the faired spinner. The big high for the day was findi= ng > 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 auxi= liary > fan for idle and taxi time. First indication I had was with the prop onl= y 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. > =20 > 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 w= as a > 70 degree day, so it may not work on a 90 degree day; but I was very plea= sed. > 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 L= yc). > =20 > It=B9s these bright spots that keep us going on these projects. > =20 > Al (stock Lyc =AD Nyet! Rotory =AD Da!) >=20 >=20 Looks good Al. You did a great job on the cowling. Bulent CZ MK-IV --B_3182481948_9914400 Content-type: text/html; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable Re: [FlyRotary] cowl on On 11/5/04 1:45 AM, &qu= ot;Al Gietzen" <ALVentures@cox.net> wrote:

I did the first “post-cure” of the custom cowl todayJ, that is, first runs with cowl on; and the faired spinner. &nbs= p;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 radiato= r 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.  F= irst indication I had was with the prop only at 700 rpm, I put my hand in fr= ont of the rad intake scoop and was surprised at the amount of air flow goin= g 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 plea= sed.  I also think it is going to give me clean airflow into the prop.<= BR> (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!)

Looks good Al. You did a great = job on the cowling.
Bulent
CZ MK-IV
 --B_3182481948_9914400--