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lgold(at)quantum-associat
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 Posted: Mon Mar 01, 2010 6:48 pm Post subject: Controlling Rotax 912 oil temp |
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It was taking a long time to warm my 912 oil temps on cold days and the temps were staying below the recommended levels. I was going to put in an oil radiator bypass thermostat, but after purchasing the unit I realized it required putting in a lot of extra pluming, thus increasing the chances of a failure. Instead, I built a simple shutter to reduce airflow through the radiator (see pics below). The oil changes temperature almost immediately when opening or closing this shutter. There is a 20-degree difference within a minute or so.
I have the old style engine mount and this shutter may not fit with the new mount.
Les
[img]cid:image005.jpg(at)01CAB96E.764EFE70[/img]
[img]cid:image006.jpg(at)01CAB96E.764EFE70[/img]
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bobkat
Joined: 07 Sep 2008
Posts: 143
Location: Bismarck, ND
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| Posted: Mon Mar 01, 2010 6:57 pm Post subject: Controlling Rotax 912 oil temp |
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Great idea Les! I have been playing around with a vane type of arrangement but yours looks better. Thank you! Right now I've been using Mexican chrome (duct tape) up here in cold ND, but with days getting warmer a cockpit adjustable thing is better. Same reason why I didn't put on the thermostat.
[quote] ---
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vgstol(at)bigpond.net.au
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| Posted: Mon Mar 01, 2010 7:24 pm Post subject: Controlling Rotax 912 oil temp |
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I tried both the Permacool and Thermostasis oil thermostats, with no appreciable results from either...... Certainly not worth all the extra hoses and hose clamps holding in hot oil..... A shutter like yours looks like the way to go. JG
On Tue, Mar 2, 2010 at 12:39 PM, Les Goldner <lgold(at)quantum-associates.com (lgold(at)quantum-associates.com)> wrote:
[quote]
It was taking a long time to warm my 912 oil temps on cold days and the temps were staying below the recommended levels. I was going to put in an oil radiator bypass thermostat, but after purchasing the unit I realized it required putting in a lot of extra pluming, thus increasing the chances of a failure. Instead, I built a simple shutter to reduce airflow through the radiator (see pics below). The oil changes temperature almost immediately when opening or closing this shutter. There is a 20-degree difference within a minute or so.
I have the old style engine mount and this shutter may not fit with the new mount.
Les
[b]
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jpspencer(at)cableone.net
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| Posted: Tue Mar 02, 2010 10:36 am Post subject: Controlling Rotax 912 oil temp |
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Les
Understand the shutter works well for warmup...can you precisely control the temp in flight? I built a vane type shutter and couldn't get it to work as designed. I'm tired of fooling around with tape and having to land enroute to adjust it as temps warmup...
Thanks
Joe
[quote][b]
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lgold(at)quantum-associat
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| Posted: Tue Mar 02, 2010 4:02 pm Post subject: Controlling Rotax 912 oil temp |
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I can hold the shutter anywhere from right against the oil heater (0-degree) to about 75-degrees away. In flight the only testing I did was at the two extremes, 0 and 75-dregrees, and noticed that the oil temps changed about 20-degrees F on a 50F day.
From: owner-zenith701801-list-server(at)matronics.com [mailto:owner-zenith701801-list-server(at)matronics.com] On Behalf Of Joe Spencer
Sent: Tuesday, March 02, 2010 10:36 AM
To: Zenith701801-List(at)matronics.com
Subject: Re: Controlling Rotax 912 oil temp
Les
Understand the shutter works well for warmup...can you precisely control the temp in flight? I built a vane type shutter and couldn't get it to work as designed. I'm tired of fooling around with tape and having to land enroute to adjust it as temps warmup...
Thanks
Joe
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agibeaut
Joined: 21 Mar 2007
Posts: 64
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| Posted: Tue Mar 02, 2010 4:19 pm Post subject: Controlling Rotax 912 oil temp |
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Les, could you forward the pics of the oil cooler baffle to me? I could not open them.
--- On Tue, 3/2/10, Les Goldner <lgold(at)quantum-associates.com> wrote:
| Quote: | From: Les Goldner <lgold(at)quantum-associates.com>
Subject: RE: Re: Controlling Rotax 912 oil temp
To: zenith701801-list(at)matronics.com
Date: Tuesday, March 2, 2010, 4:56 PM
I
can hold the shutter anywhere from right against the oil
heater (0-degree) to about 75-degrees away. In flight the
only testing I did
was at the two extremes, 0 and 75-dregrees, and noticed
that the oil temps
changed about 20-degrees F on a 50F day.
From:
owner-zenith701801-list-server(at)matronics.com
[mailto:owner-zenith701801-list-server(at)matronics.com] On
Behalf Of Joe
Spencer
Sent: Tuesday, March 02, 2010 10:36 AM
To: Zenith701801-List(at)matronics.com
Subject: Re: Controlling Rotax
912 oil temp
Les
Understand
the shutter works well for warmup...can you precisely
control the temp in
flight? I built a vane type shutter and couldn't get it
to work as designed.
I'm tired of fooling around with tape and having to
land enroute to adjust it
as temps warmup...
Thanks
Joe
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