X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([204.127.217.102] verified) by logan.com (CommuniGate Pro SMTP 5.2.6) with ESMTP id 3069689 for flyrotary@lancaironline.net; Sun, 10 Aug 2008 09:49:38 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.102; envelope-from=keltro@att.net Received: from fwebmail34.isp.att.net ([207.115.9.164]) by isp.att.net (frfwmhc02) with SMTP id <20080810134858H020010vp8e>; Sun, 10 Aug 2008 13:48:58 +0000 X-Originating-IP: [207.115.9.164] Received: from [64.136.27.230] by fwebmail34.isp.att.net; Sun, 10 Aug 2008 13:48:58 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: 2nd flight on the new cooling system Date: Sun, 10 Aug 2008 13:48:58 +0000 Message-Id: <081020081348.236.489EF1C90005B11D000000EC22243429029B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Jul 16 2008) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_236_1218376138_0" --NextPart_Webmail_9m3u9jl4l_236_1218376138_0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Steve, I believe it was Lynn Hanover that said if you connect the power leads (+ & - ) together when fan is not powered that it will not freewheel in fli= ght. Jump in here Lynn and give us one of your sketches on how to wire it so as not to accidentally switch B+ (12 volts) to ground !!......... -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "Steve Brooks" := --------------=20 George, =20 The cooling fan has some resistance when the power is off, and while I don= =E2=80=99t know for sure, I doubt that it spins when the power is off. For= m a longevity perspective of the bearings, I hope that it does not. =20 Regards, =20 Steve Brooks =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Beha= lf Of George Lendich Sent: Saturday, August 09, 2008 5:47 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 2nd flight on the new cooling system =20 Steve, Does the cooling fan spin freely when turned off or does it remain static.= =20 Those temps are much better.=20 George ( down under) I took the Cozy up this morning for the 2nd flight on the new cooling syste= m. The OAT was 3 or 4 degrees warmer than the first flight, as it was 79 F= when I took off.=20 This time, I turned the cooling fan on while I was taxiing out to the runwa= y. After the taxi and pre-flight checks, the oil was 135 F and the coolan= t was still reading pretty low. Maybe 115 to 120 or so. It is a little ha= rd to read the analog gauge down on the low end of the scale. =20 I took off and climbed up to about 1300 FT AGL, at which time I pulled the = throttle back some and continued a cruise climb. The coolant was showing a= bout 190F, and I didn=E2=80=99t think to check the oil temperature. Oil te= mperature has not been my issue. It has always been the coolant. The cool= ant temperature did still increase a little, even at the reduced power, but= just up to 200 F. I was close to a low cloud layer at about 1800 AGL, so = I throttle back some more and dropped the nose to level flight. I also tur= ned off the cooling fan to see what the temperature would do on it=E2=80=99= s own. The temperature steadily dropped to about 180 degrees within just a= few minutes, and then stabilized there.=20=20 =20 I cruised around for a little while, flew over my house and circled it once= , and then headed back to the airport. With the low cloud layer that had m= oved in, I really didn=E2=80=99t know if it was going to clear out or get t= hicker, so I flew the 5 minutes back to the airport, and made a normal land= ing. As I was ready to throttle back to descend about 800 feet to pattern = altitude, and quick check of the coolant temperature showed about 160 degre= es. Not bad at all, although I was probably flying at about 60% power. St= ill, it would have not been nearly that low before the new cooling system. =20 Once I landed and was clearing the runway, I checked the temperatures again= , and the coolant was less then 140 degrees after the glide in to land. Si= nce I planned to wash the plane, and sometimes it starts hard after getting= heat soaked sitting after a run, I turned on the cooling fan while a taxie= d over to the where the wash area is. After washing the plane, it started = up pretty easily, so I guess that worked out also. =20 So far so good. I like what I see so far on the radiator, and the cooling = fan definitely gives me a lot more options. =20 Steve Brooks Cozy N75CZ 13B turbo to read the an --NextPart_Webmail_9m3u9jl4l_236_1218376138_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_236_1218376138_1" --NextPart_Webmail_9m3u9jl4l_236_1218376138_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
 Steve,
     I believe it was Lynn Hanover that said if yo= u connect the power leads
(+ & - ) together when fan is not powered that it will not freewhe= el in flight.
 
    Jump in here Lynn and give us one of your sket= ches on how to wire it
so as not to accidentally switch B+ (12 volts) to ground !!.........
 
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/E= C2/EM2
"Mistral"_Backplate/Oil Manifold



 
-------------- Original message from "Steve Brooks" <cozy= 4pilot@gmail.com>: --------------

George,

 

The cooling fan has some resistance when the power is of= f, and while I don=E2=80=99t know for sure, I doubt that it spins when the = power is off.  Form a longevi= ty perspective of the bearings, I hope that it does not.<= /FONT>

 

Regards,

 

Steve Brooks

 

-----Original Message-----
On Behalf Of George L= endich
Sent: Saturday, A= ugust 09, 2008 5:47 PM
To: Rotary motors in aircraft
Subjec= t: [FlyRotary] Re: 2nd flight on the new cooling system

 

Steve,

Does the cooling fan spin freely when turned off or does it remain= static. 

Those temps are much better. 

George ( down under)

I took the Cozy up this morning for the 2nd flight on= the new cooling system.  The= OAT was 3 or 4 degrees warmer than the first flight, as it was 79 F when I= took off.

This time, I turned the cooling fan on while I was taxiing out t= o the runway.  After the  taxi and pre-flight checks, the = oil was 135 F and the coolant was still reading pretty low.  Maybe 115 to 120 or so.  It is a little hard to read the analog gauge do= wn on the low end of the scale.

 

I took off and climbed up to about 1300 FT AGL, at which time I = pulled the throttle back some and continued a cruise climb.  The coolant was showing about 190F, and I d= idn=E2=80=99t think to check the oil temperature.  Oil temperature has not been my issue.  It has always been the coolant.  The coolant temperature did still incr= ease a little, even at the reduced power, but just up to 200 F.  I was close to a low cloud layer at ab= out 1800 AGL, so I throttle back some more and dropped the nose to level fl= ight.  I also turned off the = cooling fan to see what the temperature would do on it=E2=80=99s own.  The temperature steadily dropped = to about 180 degrees within just a few minutes, and then stabilized there.<= SPAN style=3D"mso-spacerun: yes"> 

 

I cruised around for a little while, flew over my house and circ= led it once, and then headed back to the airport.  With the low cloud layer that had moved in, I really = didn=E2=80=99t know if it was going to clear out or get thicker, so I flew = the 5 minutes back to the airport, and made a normal landing.  As I was ready to throttle back to descen= d about 800 feet to pattern altitude, and quick check of the coolant temper= ature showed about 160 degrees.  Not bad at all, although I was probably flying at about 60% power.  Still, it would have not been ne= arly that low before the new cooling system.

 

Once I landed and was clearing the runway, I checked the tempera= tures again, and the coolant was less then 140 degrees after the glide in t= o land.  Since I planned to w= ash the plane, and sometimes it starts hard after getting heat soaked sitti= ng after a run, I turned on the cooling fan while a taxied over to the wher= e the wash area is.  After wa= shing the plane, it started up pretty easily, so I guess that worked out al= so.

 

So far so good.  I= like what I see so far on the radiator, and the cooling fan definitely giv= es me a lot more options.

 

Steve Brooks

Cozy N75CZ

13B turbo to read t= he an

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