X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vw0-f52.google.com ([209.85.212.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4331958 for flyrotary@lancaironline.net; Mon, 31 May 2010 19:10:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.52; envelope-from=rwstracy@gmail.com Received: by vws18 with SMTP id 18so3513129vws.25 for ; Mon, 31 May 2010 16:09:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=XX1ZZYIqZe6hG7flsad5DnUivhEaqD2CG5+kXGOQbLQ=; b=dfwoTQ6iC5ZaFtuJwLlc0EoW/+99ip5xtO8pDaAZOdyrTQIY95yP0j3jKBM/S9LDp4 XAwiVJUcmSdZF4vJFuAoIjgEaSXNiq3iYy6UUddLlajjhb9ttyj/D38xmHBw82uwmB3P OJJy1c4DaPMMHSRF16JsA3NXxRlcoCuOzFKx8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=uGCjFDrd9r/MK9FVT4gczMknX4u5PItQpU6eT8HD0ieKLueBm1xkra7WIf7iqqe0I+ Oa+5nr3hFfWtY+ytpBJSaEGYicL4iTmedX7jc8qN3ErOuxckiTyjaXidab978W6ptzoZ P1XbTZhMQXXCPA4QMQ6Ks/qQ4nZ/gFD57GN3A= MIME-Version: 1.0 Received: by 10.220.122.220 with SMTP id m28mr3906569vcr.142.1275347398344; Mon, 31 May 2010 16:09:58 -0700 (PDT) Sender: rwstracy@gmail.com Received: by 10.220.171.142 with HTTP; Mon, 31 May 2010 16:09:58 -0700 (PDT) In-Reply-To: References: Date: Mon, 31 May 2010 19:09:58 -0400 X-Google-Sender-Auth: 0gkzTi12nm6HNHdsq1ukCH92E88 Message-ID: Subject: Re: [FlyRotary] Rear Rotor Coolant Leak From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001636ed677da4bf7c0487ebf497 --001636ed677da4bf7c0487ebf497 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable If I read that correctly, you lost TWO GALLONS of coolant during that hot taxi? The temps HAD to be more than 225F for that to happen. Tracy (in colorado) On Fri, May 21, 2010 at 4:44 PM, Bobby J. Hughes wrote: > > > I have developed a small coolant leak in the #2 rotor of my renesis. It > seems to be limited to the engine sitting for long periods of time. I > discovered it when checking the plugs after the engine had not been start= ed > for a couple of months while fitting the new supercharger. The leading pl= ug > was wet. Pulling the prop through sprayed some coolant out of the leading > plug hole. I checked the fluid level and it was a little lower than I > remember. I added some water and marked the level on a stick for > reference. The next day I check the level and found no measurable drop. = Since > I had just installed the larger supercharger I decided to do a few ground > runs and check the coolant for leaks and keep a close eye on the water > pressure. I made several ground runs and everything was normal. The plane > was schedule for body work at a paint shop as soon as I could make the 50 > mile trip. I waited a few days and rechecked the fluid level. Again no > measurable drop. I then made three short flights around the airport to > check out the new supercharger and kept a close eye on water pressure and > temps. Everything was normal. After checking the coolant level the next d= ay > I made the trip to the painters. The flight was normal but the pilot was = a > little nervous. > > > > The plane has not been started for six weeks and it sprayed maybe two > tablespoons of coolant when pulling the prop through. I did not have my > measuring stick but I could tell coolant level was a little lower then th= e > last time I had checked it. > > > > I will most likely have to replace the o-ring. I overheated one time last > summer during a =BE mile uphill taxi and OAT above 100F. The tarmac temps > could have been 115F. I shut the engine down when the coolant temps got t= o > 225F but they kept climbing. I think it took two gallons of water to refi= ll > the system. > > > > Since my water pressure is normal and does not leak down rapidly after > shutdown is it possible the engine heat is sealing the O-ring ? Maybe I > just need to re-torque the big bolts. > > > > Bobby Hughes > > RV10 Renesis > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > --001636ed677da4bf7c0487ebf497 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable If I read that correctly, you lost TWO GALLONS of coolant during that hot t= axi?=A0=A0 The temps HAD to be more than 225F for that to happen.

Tr= acy (in colorado)

On Fri, May 21, 2010 at= 4:44 PM, Bobby J. Hughes <bhughes@qnsi.net> wrote:
=A0

I have developed a sm= all coolant=20 leak in the #2 rotor of my renesis. It seems to be limited to the engine si= tting=20 for long periods of time. I discovered it when checking the plugs after the= =20 engine had not been started for a couple of months while fitting the new=20 supercharger. The leading plug was wet. Pulling the prop through sprayed so= me=20 coolant out of the leading plug hole. I checked the fluid level and it was = a=20 little lower than I remember. =A0I=20 added some water and marked the level on a stick for reference. The next da= y I=20 check the level and found no measurable drop.=A0 Since I had j= ust installed the larger=20 supercharger I decided to do a few ground runs and check the coolant for le= aks=20 and keep a close eye on the water pressure. I made several ground runs and= =20 everything was normal. The plane was schedule for body work at a paint shop= as=20 soon as I could make the 50 mile trip. I waited a few days and rechecked th= e=20 fluid level. Again no measurable drop.=A0=20 I then made three short flights around the airport to check out the = new=20 supercharger and kept a close eye on water pressure and temps. Everything w= as=20 normal. After checking the coolant level the next day I made the trip to th= e=20 painters. The flight was normal but the pilot was a little nervous.

=A0

=A0The p= lane has not been started for six=20 weeks and it sprayed maybe two tablespoons of coolant when pulling the prop= =20 through. I did not have my measuring stick but I could tell coolant level w= as a=20 little lower then the last time I had checked it.

=A0

I will most likely ha= ve to=20 replace the o-ring. I overheated one time last summer during a =BE mile uph= ill=20 taxi and OAT above 100F. The tarmac temps could have been 115F. I shut the= =20 engine down when the coolant temps got to 225F but they kept climbing. I th= ink=20 it took two gallons of water to refill the system.

=A0

=A0Since= my water pressure is normal and=20 does not leak down rapidly after shutdown is it possible the engine heat is= =20 sealing the O-ring ? =A0Maybe I just=20 need to=A0re-torque the big bolts.

=A0

Bobby=20 Hughes

RV10=20 Renesis


--
Homepage: =A0http:/= /www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html


--001636ed677da4bf7c0487ebf497--