----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----John,
If you leave a light bulb inside the cowl you will heat up the oil, engine AND the water that is in the oil that has accumulated during combustion blow-by. That water will gather on your steel engine parts such as your crank shaft and cam shaft, rusting them. Using the light bulb for 2 hours or so before engine start is good, and be sure to fly for at least an hour in order to evaporate a lot of the accumulated water.
Syd Cohen
Elaine Campbell wrote:
----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----TCM recommends preheating at 20 degrees F. N5466F is hangared in S.E. PA where the average overnight low in Dec./Jan. is approx. 10 degrees F. Is there anything wrong with placing a protected lightbulb in the bottom of the cowl to raise the temperature during these relatively cold months. I have used this technique, on occasion around the house over the past 50 yrs., and found it effective-- ie. balky garage door opener, frozen water main valve, etc.-- but I have never seen it offered as an engine preheating aid for an airplane. Although the temperature rise would be modest, sometimes that is all you need.John...N5466F============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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