Still waiting for good weather for that 1st flight!!! So, project time!
Here is what I put together for an engine preheater after receiving the temperature controller this afternoon. YES, it is starting to get cold here!!
Had to look a bit for the milkhouse heater, most have two settings (1350 W and 1500 W). This one, from True Value is 600W, 900W or 1500W, I will use the lowest setting.
Bought all of the sheet metal components from Menard's.
The temperature controller is microprocessor based. It is a RANCO ETC-111000-000 Electronic Temperature Controller ($59). It is available on the internet...
Go to........ http://www.rancoetc.com/
You can set any temperature and any differential. I will keep the engine compartment between 60 and 70 degF. All you have to do is stick the thermistor (sensor) in the front opening on the cowl.
Also carved 3 shapes to plug the openings on the front from a gardener's kneeling pad.
The heater has a 3 year warranty, BUT, think I violated the terms!!!!!!!
UPDATE: I replaced the metal flexible duct with a 2' piece of 6" SCAT tubing from Wicks Aircraft. The flexible metal duct was too rigid.
