Mark L. If you were going to have only one EGT probe on a Corvair engine, which cylinder would be the most beneficial to place it on? I still have some of the one cyl EGTs and see some for sale occasionally really cheap. When I first started flying in 1969 (dinosaur days) most private planes did not have EGTs, just the cool guys were starting to have them and then usually only one probe/cylinder EGTs. Alcor was the best at the time and then later developed the first multi cyl EGTs that I remember. Those gages had one needle readout and a dial to switch to 4 different probes/cylinders. The pilot could only see a readout on one cylinder at a time, dial, see cyl #1, dial see cyl #2 etc. If you developed a problem on a cylinder that you weren't switched to then you missed it, unless something bad happened of course. Things have changed dramatically since those days thank goodness. Larry H.
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