---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Tue 01/23/18: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:08 PM - Re: Super-cool oil temp (Roger Kemp) ________________________________ Message 1 _____________________________________ Time: 08:08:08 PM PST US From: Roger Kemp Subject: Re: Yak-List: 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 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 > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=477374#477374 > > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.