mocfly Posted April 17, 2012 Report Posted April 17, 2012 I was looking at the way the radiator sits in the cowl relative to incoming wind and wondered if the reason we have such a problem with high oil temps is directly related to the air not going thru the radiator. My thought is to create a multi shutter device which moves the air relative to the wind and create more direct flow thru the radiator. Anyone have any thoughts or has anyone experimented with this? Just a random thought.
mocfly Posted April 17, 2012 Author Report Posted April 17, 2012 Roger, The prop has been re-pitched to achieve the 5500-5600 wot. I did notice tHat the temps ran higher after the oil thermostat was put in than before. About 60 degrees warmer. Now it runs right at the top of the green (230) and maybe higher if I don't watch it closely. That 230 was at 5250 and oat of 60f Chris
mocfly Posted April 17, 2012 Author Report Posted April 17, 2012 Changed from Evans to dex for coolant.
mocfly Posted April 17, 2012 Author Report Posted April 17, 2012 Roger, Here are 2 pics. Picture one is prior to coolant change and thermostat install. OAT was 65 deg in cruise Picture two is in cruise with an oat about 70. Chris
mocfly Posted April 18, 2012 Author Report Posted April 18, 2012 Roger, If I move the needle clip to a richer position (your gonna have to refresh my memory which number it is) do you believe it will help? I read that some people use -6 and 80 knots in the climb saying it helps. I was told never to go - flaps until over 100 knots. Can I get your thoughts on this? I would have thought that a thermostat will regulate the temperature to maintain a set temperature? What I am seeing is not making sense to me. I know some of us have issues and others do not. Maybe we have one of those which always run "warm"
Jim Meade Posted April 18, 2012 Report Posted April 18, 2012 The Vfe for 0° flaps is 100 KIAS, so you should be going to negative flaps before that. Per the POH. For CTSW.
bitten192 Posted April 18, 2012 Report Posted April 18, 2012 I was looking at the way the radiator sits in the cowl relative to incoming wind and wondered if the reason we have such a problem with high oil temps is directly related to the air not going thru the radiator. My thought is to create a multi shutter device which moves the air relative to the wind and create more direct flow thru the radiator. Anyone have any thoughts or has anyone experimented with this? Just a random thought. REMOS has a oil cooler shutter fitted to the oil cooler frame. Pretty simple and effective. Push-pull knob on the control panel. Probably could be fitted to the CT but would require an LOA unless you are ELSA. Ernie
coppercity Posted April 18, 2012 Report Posted April 18, 2012 I generally always use -6 flaps after leaving the pattern and climb at 78kias for Vy and cruise climb at 90kias. Our summer temps can get to 100-115F OAT so on those afternoons I occasionally have to throttle back to 4800 in the climb to keep the temps in the lower yellow, but most the time full throttle climb even at those temps is not a problem. Yes you should go to -6 before exceeding 100kias.
FlyRatz Posted April 18, 2012 Report Posted April 18, 2012 I have had temperature problems with a CTSW, which had the thermostat option installed. This engine used to run as cool as almost all CTs do. But the temperatures rised up very little but continuously over time and one day the critical area was reached. Ater a long journey of tests and diagnosis, I could not find the reason for the high temperatures. Then I brought the water radiator to a radiator repair shop, which is able to do some measurements about the performance of the radiator. This was my golden shot. They found out, that the radiator had only 30 % of its capacity left. A new radiator then did the job and the engine runs as cool as ever. Maybe it is worth a try? Good luck Markus
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