X-Virus-Scanned: clean according to Sophos on Logan.com From: "David Leonard" Received: from mail-qc0-f175.google.com ([209.85.216.175] verified) by logan.com (CommuniGate Pro SMTP 6.1.2) with ESMTPS id 7675131 for flyrotary@lancaironline.net; Wed, 06 May 2015 04:47:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.175; envelope-from=wdleonard@gmail.com Received: by qctx5 with SMTP id x5so1238882qct.0 for ; Wed, 06 May 2015 01:46:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=vYNUNs6aeYrkE/eSFe0jwqYZ0NSep9uDxKmm1/bURZ4=; b=hcIXlZ54R6n8L0nWXI7guupZRrDnbzFMcCeD6Jd69amDDMD/QungUuMRfBF9LQVmcc 37BD7Z8ZDWOgKeCyB6xbA5O6SUgjfIq8t5nv5IGW8YK8cmQ1Wy8MUDvEH9oOa+E+S9TY Nf0GwGnoKkj/5joOmuhImnT706OUDIFY13SCe1RdEN4W4NmcUDZtfxGYbWimMtdjO8qb S8eFoCNsldGA/eVjD5qNfxu6QmhPwPeJdq1lYXqcS5RH2deI9siP+LVEXBXml8XeKOJI NP48pwZhn5AHgHQEWKsQMYmTJeUgjl9IEShho8iPoOJ+odv6j5rKzDz21gjsA9jJvvhT p8hQ== MIME-Version: 1.0 X-Received: by 10.229.247.10 with SMTP id ma10mr41124583qcb.30.1430901998981; Wed, 06 May 2015 01:46:38 -0700 (PDT) Received: by 10.140.92.13 with HTTP; Wed, 6 May 2015 01:46:38 -0700 (PDT) In-Reply-To: References: Date: Wed, 6 May 2015 01:46:38 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Return to Flight To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a1134a5e65bb162051565d525 --001a1134a5e65bb162051565d525 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I went from 22"x24"x2" to 22x24x3. But I dont think I really needed to, the first one probably would have worked. I think the important thing was giving it plenty of clean cool air. Custom from C&R racing at a very reasonable price. I even have the old one for sale if that size works for you. Dave Leonard On Tue, May 5, 2015 at 9:57 PM, steve Izett wrote: > Hi Dave > > Did you change your radiator? What is its area/volume now? > > Cheers > > Steve Izett > > > On 6 May 2015, at 9:31 am, David Leonard > wrote: > > I agree with Bobby, this may (hopefully) be the cause, but if so it just > means that you didn't design in an adequate way to fill the coolant witho= ut > trapping air. You would hate to have to do a coolant-prep flight every > time you wanted to drain and refill the coolant. (but not the end of the > world). > > I originally designed my system like Ed's. Minimal drag (just the 2 stoc= k > RV-6 inlets) but cooling was like you and Ed describe... OK, but you > always have to keep and eye on it and often reduce power or AOA in order = to > keep coolant temps in check. Then I made a major change to provide TONS = of > air to an adequately sized radiator. Since, I never even think about > cooling. Yes, I do probably burn a little more fuel but it is well worth > it to never worry about cooling again. Its not rocket science. Adequate > air to an adequate radiator equals adequate cooling. Change adequate to > plenty in that sentence and now your are rocking! > > Dave Leonard > > On Mon, May 4, 2015 at 12:37 PM, Bobby J. Hughes < > flyrotary@lancaironline.net> wrote: > >> Jeff, >> >> >> >> Congratulations on getting back in the air. That =C2=BD quart of coolant= may >> have been trapped air that purged during flight. >> >> >> >> Bobby Hughes >> >> N416AS- >> >> RV10 223 hrs >> >> >> >> *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] >> *Sent:* Monday, May 04, 2015 7:53 AM >> *To:* Rotary motors in aircraft >> *Subject:* [FlyRotary] Return to Flight >> >> >> >> Yesterday 3-May, my bird got airborne once again on its maiden flight >> after 2+ years rebuilding. I had a friend test-pilot fly it while I was >> flight engineer watching the gauges. Flight controls and rigging were >> reported to be good and the engine performed flawlessly. The oil >> temperature was stable around 160F (Mazda oil cooler in series with a >> Fluidyne) but again the water temperature was high reaching 210F by circ= uit >> height so we backed off the throttle, did a touch and go with a 500=E2= =80=99 >> circuit and parked it. One unusual result was the cooling system pressu= re >> was only at 5-6 psi; with the high temperature it should have been 15-16 >> psi. Removed the cowlings and found no leaks of either oil or glycol. = I >> checked the coolant level and it was down, requiring 1/2 quart to top it >> up. I also looked at my pinched duct and think it needs more pinching, s= o >> am already starting to modify that =E2=80=93 hope to get another test fl= ight in >> before the weekend. >> >> >> >> Jeff >> >> This message, and the documents attached hereto, is intended only for th= e >> addressee and may contain privileged or confidential information. Any >> unauthorized disclosure is strictly prohibited. If you have received thi= s >> message in error, please notify us immediately so that we may correct ou= r >> internal records. Please then delete the original message. Thank you. >> > > > --001a1134a5e65bb162051565d525 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I went from 22"x24"x2" to 22x24x3.=C2=A0 Bu= t I dont think I really needed to, the first one probably would have worked= .=C2=A0 I think the important thing was giving it plenty of clean cool air.= =C2=A0 Custom from C&R racing at a very reasonable price.=C2=A0 I even = have the old one for sale if that size works for you.

Da= ve Leonard

On Tue, May 5, 2015 at 9:57 PM, steve Izett <flyrotary@lanc= aironline.net> wrote:
Hi Dave

Did you change yo= ur radiator? What is its area/volume now?

Cheers

Steve Izett


On 6 May 2015, at 9:31 am,= David Leonard <flyrotary@lancaironline.net> wrote:

I agree with Bobby, this may (hopefully) be the cause, but if so i= t just means that you didn't design in an adequate way to fill the cool= ant without trapping air.=C2=A0 You would hate to have to do a coolant-prep= flight every time you wanted to drain and refill the coolant. (but not the= end of the world).

I originally designed my system like= Ed's.=C2=A0 Minimal drag (just the 2 stock RV-6 inlets) but cooling wa= s like you and Ed describe...=C2=A0 OK, but you always have to keep and eye= on it and often reduce power or AOA in order to keep coolant temps in chec= k.=C2=A0 Then I made a major change to provide TONS of air to an adequately= sized radiator.=C2=A0 Since, =C2=A0I never even think about cooling.=C2=A0= Yes, I do probably burn a little more fuel but it is well worth it to neve= r worry about cooling again.=C2=A0 Its not rocket science.=C2=A0 Adequate a= ir to an adequate radiator equals adequate cooling.=C2=A0 Change adequate t= o plenty in that sentence and now your are rocking!

Dave Leonard

On Mon, May 4, 2015 at 12:37 PM, Bobby J. Hughes <flyro= tary@lancaironline.net> wrote:

Jeff,

=C2=A0

Congratulations on g= etting back in the air. That =C2=BD quart of coolant may have been trapped = air that purged during flight.

=C2=A0

Bobby Hughes

N416AS-

RV1= 0=C2=A0 223 hrs

=C2=A0

From: Rotary motors in ai= rcraft [mailto:flyrotary@lancaironline.net]
Sent: Monday, May 04= , 2015 7:53 AM
To: Rotary motors in aircraft
Subject: [= FlyRotary] Return to Flight

=C2=A0

Yes= terday 3-May, my bird got airborne once again on its maiden flight after 2+= years rebuilding.=C2=A0 I had a friend test-pilot fly it while I was fligh= t engineer watching the gauges.=C2=A0 Flight controls and rigging were repo= rted to be good and the engine performed flawlessly.=C2=A0 The oil temperat= ure was stable around 160F (Mazda oil cooler in series with a Fluidyne) but= again the water temperature was high reaching 210F by circuit height so we= backed off the throttle, did a touch and go with a 500=E2=80=99 circuit an= d parked it.=C2=A0 One unusual result was the cooling system pressure was o= nly at 5-6 psi; with the high temperature it should have been 15-16 psi.=C2= =A0 Removed the cowlings and found no leaks of either oil or glycol.=C2=A0 = I checked the coolant level and it was down, requiring 1/2 quart to top it = up. I also looked at my pinched duct and think it needs more pinching, so a= m already starting to modify that =E2=80=93 hope to get another test flight= in before the weekend.

=C2= =A0

Jeff

This message, and the documents attached hereto, is = intended only for the addressee and may contain privileged or confidential = information. Any unauthorized disclosure is strictly prohibited. If you hav= e received this message in error, please notify us immediately so that we m= ay correct our internal records. Please then delete the original message. T= hank you.


--001a1134a5e65bb162051565d525--