X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ey-out-2122.google.com ([74.125.78.25] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3341607 for flyrotary@lancaironline.net; Mon, 08 Dec 2008 08:54:06 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.78.25; envelope-from=msteitle@gmail.com Received: by ey-out-2122.google.com with SMTP id 25so536700eya.25 for ; Mon, 08 Dec 2008 05:53:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type:references; bh=ffadRAoGNgLYjBc0smESomSvGfLFG93KzXo9G18jj+Q=; b=aFFXr/LLqUBgG04AXfQ3ORKoQQehwFTPrg/BT/2JgflBaRQIBA1jtEiycdZUdDhOa+ TLoCUgIA8+MuuQV8Z6A6XVQpQubt2Zwb04KZHtVA5OLPRkhOnX/uIp5UtM2II2hiEkTj ts7qPXx65XTmjLKObRz6CUnKVn2U8mfe+rO0w= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:references; b=Z1OGl6DT1ayolZMtekmWDZTa6HPWfLr15aGdMi84dFAviKBC82joPobJFjP5V5eKeE Ea1Wqb/3kMs/kZ0AuIZ3RnGoD6ux/rRqUEJIzpm5Qdl6/fF457vmMd28p2k1ePsOkEf1 loxwm3MGvxnXF4L+vLEgH3Fl+yHsJQwkhbGLI= Received: by 10.210.56.7 with SMTP id e7mr3170253eba.67.1228744408914; Mon, 08 Dec 2008 05:53:28 -0800 (PST) Received: by 10.210.21.19 with HTTP; Mon, 8 Dec 2008 05:53:28 -0800 (PST) Message-ID: <5cf132c0812080553m717047bdg81afcf412a2116d9@mail.gmail.com> Date: Mon, 8 Dec 2008 07:53:28 -0600 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Update ... Three more flights, water ok, oil too cool In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_73932_24325430.1228744408912" References: ------=_Part_73932_24325430.1228744408912 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Jeff, Climb out temps are of concern because they are the worst-case scenario, bu= t they are also short-lived. What are your oil & water temps in cruise? Min= e were good during the summer months, but now that it colder weather is here, they have dropped into the 130* range, which is much too cool. Saturday I installed a thermostat and then flew it. Temps in cruise were 195* water, 193* oil. I'll wait to see what happens when it starts warming up next spring, but for now, the thermostat stays in. I did notice that with the thermostat installed, coolant pressure went up. Makes sense as I now have a significant flow-restrictor in the system. I would prefer to control temps with cowl flaps, as that would result in less drag, but I'm still designing that system. Mark S. On Mon, Dec 8, 2008 at 7:23 AM, Jeff Whaley wrote: > With thermostat removed, bypass plugged, new accessory belts and > alternator pulley installed, we retested the new rotary installation. > > On first climb out water temperature reached only 195F, compared to 230F = on > very first flight a week ago. With the water temperature okay we did 2 to= uch > and goes then shut everything down and checked under the cowl =85 no brok= en > belts, no leaks that's a relief. > > On the subsequent climb outs the water temp was about 185F; on approach t= he > water cooled to 150F. I guess with the approach momentum you spend less t= ime > at full throttle on a touch and go. Some other numbers of interest, 6300 > rpm, 1100 fpm, outside air temp 30F, oil temp 110F. > > > > So I would say that the water cooling system is still not good enough (at > 80F that 195 could go to 245F) on the other hand my oil is too cool. > > For present winter operations I'm wondering =85 put the thermostat back i= n, > which may help the oil =85 I don't like the cooling to 150F on approach, = or > should I keep the systems separate? Plug the oil cooler air intakes or > outlets? Or should we first fly at cruise speeds for 10-15 minutes to see > how things stabilize? > > Jeff Whaley > > (I call it an airplane now) > > > ------=_Part_73932_24325430.1228744408912 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Jeff,
 
Climb out temps are of concern because they are the worst-case scenari= o, but they are also short-lived.  What are your oil & w= ater temps in cruise?  Mine were good during the summer months, b= ut now that it colder weather is here, they have dropped int= o the 130* range, which is much too cool.  Saturday I installed a ther= mostat and then flew it.  Temps in cruise were 195* water, 193* o= il.  I'll wait to see what happens when it starts warmin= g up next spring, but for now, the thermostat stays in. &nbs= p;I did notice that with the thermostat installed, coolant pressure we= nt up.  Makes sense as I now have a significant flow-restrictor in the= system.
 
I would prefer to control temps with cowl flaps, as that would re= sult in less drag, but I'm still designing that system. 
 
Mark S.

On Mon, Dec 8, 2008 at 7:23 AM, Jeff Whaley <jwhaley@datacast.= com> wrote:

With thermostat removed,= bypass plugged, new accessory belts and alternator pulley installed, we re= tested the new rotary installation.

On first climb out water= temperature reached only 195F, compared to 230F on very first flight a wee= k ago. With the water temperature okay we did 2 touch and goes then shut ev= erything down and checked under the cowl =85 no broken belts, no leaks that= 's a relief.

On the subsequent climb = outs the water temp was about 185F; on approach the water cooled to 150F. I= guess with the approach momentum you spend less time at full throttle on a= touch and go. Some other numbers of interest, 6300 rpm, 1100 fpm, outside = air temp 30F, oil temp 110F.

 

So I would say that the = water cooling system is still not good enough (at 80F that 195 could go to = 245F) on the other hand my oil is too cool.

For present winter opera= tions I'm wondering =85 put the thermostat back in, which may help the oil = =85 I don't like the cooling to 150F on approach, or should I keep the syst= ems separate? Plug the oil cooler air intakes or outlets? Or should we firs= t fly at cruise speeds for 10-15 minutes to see how things stabilize?

Jeff Whaley

(I call it an airplane n= ow)

 

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