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1. 08:08 PM - Re: Super-cool oil temp (Roger Kemp)
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| Subject: | Re: Super-cool oil temp |
I split a strip of duck tape in half. I then put the two halves over the length
of capillaries on the face of the cooler. I do that when the OAT is going to
be less that 40 deg F. Keeps the oil temps in the 50 deg C Range.
Doc
Sent from my iPad
> On Jan 17, 2018, at 12:44 PM, apatton2 <apatton@alumni.princeton.edu> wrote:
>
>
> Hi All,
> I recently acquired a Yak-50 from the UK (the former G-JYAK). I continue to work
on getting it into tune (have replaced the carburetor and mags with overhauled
units).
>
> When warm it runs very smoothly and well, developing at least book power (>=8.85
potatoes MP on takeoff). Engine is the stock M14P... only mods are the auto
ignition harness and an intake drain kit.
>
> However, the oil temp takes a very long time to come up to 40degC on start. Overnight
temps in my area (NorCal) get as cold as 5degC but are generally warmer.
However, upon pulling the airplane out of the hangar and starting it, oil
temp reads zero C, and will take 20min to get to 40 degC. In fact, after as much
at 5min after engine start, the oil temp indicator still indicates 0degC.
>
> This isn't great as I believe that the prolonged run at low power begins to foul
plugs. When it's warmed up and motoring at 82% / 7 potatoes in high-power
cruise, oil temp needle tends to "stand straight up" at 70-80deg C.
>
> I'm wondering about 2 potential causes:
> 1. Is there a variable problem with the indicator? I.e. inaccurate at low power
settings/low temps but fine at higher power settings.
> 2. Could there be some abnormal oil circulation, especially at low power settings,
that is allowing cold oil to stagnate around the temp probe for awhile,
even after startup.
>
> Every other indication, as far as I can tell, is normal. CHT temps will come
up to ~ 75-100degC while waiting for the oil temp to come up.
>
> Any thoughts would be greatly appreciated.
> Thanks!
> Andrew
>
> --------
> Andrew Patton
> Yak-50
>
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>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=477374#477374
>
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