X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=HLeBLclv c=1 sm=1 tr=0 a=h/2l+vn1J2DkYOOB9BQDdQ==:117 a=x7bEGLp0ZPQA:10 a=xXDCcK6TKBsA:10 a=7mUfYlMuFuIA:10 a=on22okXAAAAA:8 a=Ia-xEzejAAAA:8 a=MdsbnzRwHrThYsc015YA:9 a=QEXdDO2ut3YA:10 a=ms1aKhA6pUOfO7Eb7l4A:9 a=cSit4fMoUE1lDYd2:21 a=NPqpj5bUEVj9vR1HIonK:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "Todd Bartrim bartrim@gmail.com" Received: from mail-ed1-f52.google.com ([209.85.208.52] verified) by logan.com (CommuniGate Pro SMTP 6.2.5) with ESMTPS id 11292862 for flyrotary@lancaironline.net; Sat, 23 Jun 2018 05:03:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.52; envelope-from=bartrim@gmail.com Received: by mail-ed1-f52.google.com with SMTP id q24-v6so874407edr.1 for ; Sat, 23 Jun 2018 02:03:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=L19KN+Tpp6QkT3C/xkE495wUSDiFDcSfsocKdj9uYoY=; b=obGN4fMD+jZtZQTRS7RVMPtiogKQ1U42YLHD1XnH4MRdShKcbSb2QIinbtsNzKgFuL DrAsP8rXOSBUa7fpWHEaHgb0kqvnKa10N0x5By/2b2aeqj0C7jUTUBZ0XXr1gpiK/TE3 7tivcSfxBmqKvdX85WYqpjPCdoipAFEGGyWEy4TXWDQau5RAQvrPa0kMMh5Mc5DCWJja KwljZCFSFs5PJaaAeJrzVv9T7hgBAV1MNawxZGkRlhLaQs+m5nzyxPLbQTPtlXBeDKUp W8bkvQdr9EaulLptUvu1y/42+m4BoHLfG7fHMaSUTHZpMkhl6QPKT+SryJOrlLf01MQw itbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=L19KN+Tpp6QkT3C/xkE495wUSDiFDcSfsocKdj9uYoY=; b=k3zFTzjIzCn0BovXuqYglFABlafXgjuMb9uw1tanATROULuC/fjhcthlLaYPBsorGb Hd9P1X29v9jlq/lWHA+wvU0hBuHwjVcQyen+O1m8yOd4dOgQDC61enJaP1rfEt9tc7Wc quB/a3GULfd9F++c8Gkbq1/aiPBlt0CWDmaPlkFnyyopuycvURy8LXzHagNPml52jZTW Ss8vA1eYlG6gPd4slTNsFMiFOxPDHHXWHj4u5uqNt/VTMqLeT0kIwvwzEqR9FHv8MVDP Xq5YinbhOUY6RyCxGixx8v3/mquXJ5FWS7C5Imznxd8R0+XH5ch62XUPjHXX+rEHoX00 WyPg== X-Gm-Message-State: APt69E1OyCwAY8tyRLAC6+wPBfDsQxAaY6cH4ihdOyqi3BeyJ5QJFm0f VNrCNLorjbnSZM7+7+sZdS4nP4pZcNPEmrt5bg== X-Google-Smtp-Source: ADUXVKKhysiV04atJ+1kzlCAQRIg/5DDfWayaQnPet7BefZ9iJ2r1bPUz5gxuFWwE13/1TFo7vkEofglmwz4Y0kEapI= X-Received: by 2002:aa7:c147:: with SMTP id r7-v6mr4659568edp.143.1529744619462; Sat, 23 Jun 2018 02:03:39 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sat, 23 Jun 2018 02:03:26 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Oil cooler thermost.. To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000a3e4aa056f4b6c19" --000000000000a3e4aa056f4b6c19 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Ok, good to hear from another cold weather flyer. I removed the thermostat tonight. The bypass hole was just the right size to tap out to a 3/8 bolt thread and I could just reach it with a tap. I put in a short bolt with loc-tite to plug the bypass. If by any chance it ever comes loose, it will just fall into the thermostat cap and will not impede flow. Oil temps would rise as oil could bypass the cooler but flow would remain. So I'll run it up in the morning to test it. Todd On Fri, Jun 22, 2018, 05:28 Jeff Whaley jwhaley@datacast.com, < flyrotary@lancaironline.net> wrote: > Todd, I wouldn=E2=80=99t worry too much about cold oil as long as it is 1= 00% > synthetic. > > I=E2=80=99m near Ottawa, so it can be +30C in the summer and -30C in the = winter > with significant temperature swings from day to day. At one time I wante= d > an oil cooler thermostat for winter flying, as I was scavenging heat from > one oil cooler (I have 2) but have typically opted for air flow > restriction. I was restricting one cooler (Fluidyne) at < 10C and both a= t > < 0C; historically I had better oil cooling than water jacket cooling but > last summer I decided to try increasing the water cooling at the expense = of > oil cooling. One of the Fluidynes was converted to a large =E2=80=9Cheat= er core=E2=80=9D > and feed from the 3/4 inch port designed for that; the result was cool > water and hot oil. I then bought a medium sized Mishimoto cooler through > Amazon and went back to 2 oil coolers, though slightly less capacity than > before. The result is now I have pretty well matched temperatures > throughout the power envelope. The other day cruising at 2500 ft and 27C > (80F) both temps settled in around 177F ... I=E2=80=99m okay with that be= cause at > 32C my temps should both be under 190F. > > This past winter I decided to try out a thermostat on the water jacket > because without it the water temps would barely register (110F) if OAT wa= s > near freezing and I now have a big =E2=80=9Cheater core=E2=80=9D. The re= sult was my water > jacket temperature was between 185F-190F all winter long (better cabin > heat) and my oil temperature was typically around 175F-180F even on cold > days. At present I=E2=80=99m operating without any thermostats but aroun= d November > I=E2=80=99ll put the water jacket thermostat back in ... > > Jeff > > > > Some (most?) Of you are using custom or at least aftermarket oil coolers > but I think there are a few like me that are using stock oil coolers. How > many have removed the thermostat and plugged the bypass hole? > > Do any of the non-stock coolers have a thermostat? > > A Google search on the subject shows that on the RX7 forums it seems to b= e > generally accepted to leave it alone. > > But for our use I'm less inclined to think we always need it and it > seems to be quite restrictive. > > Of those flying without one in either stock or non-stock, how many are > flying in warm climates only? Anybody in cold? Jeff? > > I'm just concerned about winter flying especially during a long descent > where it might cool excessively and then if I was required to use sudden > power for a missed approach, would that cold oil be a problem? > > > > Todd > > > --000000000000a3e4aa056f4b6c19 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Ok, good to hear from another cold weather flyer.
=C2=A0 I removed the = thermostat tonight. The bypass hole was just the right size to tap out to a= 3/8 bolt thread and I could just reach it with a tap.
=C2=A0 I p= ut in a short bolt with loc-tite to plug the bypass. If by any chance it ev= er comes loose, it will just fall into the thermostat cap and will not impe= de flow. Oil temps would rise as oil could bypass the cooler but flow would= remain.
=C2=A0 So I'll run it up in the morning to test it.<= /div>

Todd

On Fri, Jun 22, 2018, 05:28 Jeff Whaley jwhaley@datacast.com, <flyrotary@lancaironline.net> wrote:

Todd, I wouldn=E2=80=99t worry too much about cold o= il as long as it is 100% synthetic.

I=E2=80=99m near Ottawa, so it can be +30C in the su= mmer and -30C in the winter with significant temperature swings from day to= day.=C2=A0 At one time I wanted an oil cooler thermostat for winter flying= , as I was scavenging heat from one oil cooler (I have 2) but have typically opted for air flow restriction.=C2=A0 I was = restricting one cooler (Fluidyne) at < 10C and both at < 0C; historic= ally I had better oil cooling than water jacket cooling but last summer I d= ecided to try increasing the water cooling at the expense of oil cooling.=C2=A0 One of the Fluidynes was converted to= a large =E2=80=9Cheater core=E2=80=9D and feed from the =C2=A03/4 inch por= t designed for that; the result was cool water and hot oil.=C2=A0 I then bo= ught a medium sized Mishimoto cooler through Amazon and went back to 2 oil coolers, though slightly less capacity than before.=C2=A0 The res= ult is now I have pretty well matched temperatures throughout the power env= elope.=C2=A0 The other day cruising at 2500 ft and 27C (80F) both temps set= tled in around 177F ... I=E2=80=99m okay with that because at 32C my temps should both be under 190F.

This past winter I decided to try out a thermostat o= n the water jacket because without it the water temps would barely register= (110F) if OAT was near freezing and I now have a big =E2=80=9Cheater core= =E2=80=9D.=C2=A0 The result was my water jacket temperature was between 185F-190F all winter long (better cabin heat) and my oil tempe= rature was typically around 175F-180F even on cold days.=C2=A0 At present I= =E2=80=99m operating without any thermostats but around November I=E2=80=99= ll put the water jacket thermostat back in ...

Jeff

=C2=A0

Some (most?) Of you are using custom= or at least aftermarket oil coolers but I think there are a few like me th= at are using stock oil coolers. How many have removed the thermostat and plugged the bypass hole?

Do any of the non-stock coolers have= a thermostat?=C2=A0

A Google search on the subject shows= that on the RX7 forums it seems to be generally accepted to leave it alone= .

=C2=A0 But for our use I'm less = inclined to think we always need it and it seems to be quite restrictive.= =C2=A0

=C2=A0 Of those flying without one i= n either stock or non-stock, how many are flying in warm climates only? Any= body in cold? Jeff?=C2=A0

=C2=A0 I'm just concerned about = winter flying especially during a long descent where it might cool excessiv= ely and then if I was required to use sudden power for a missed approach, would that cold oil be a problem?=C2=A0

=C2=A0

Todd=C2=A0

=C2=A0

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