rotor tach question

giro5

Senior Member
Joined
Mar 19, 2006
Messages
1,272
Location
Farmington, New Mexico
Aircraft
prev- citabria,AA1b, fun racer
Total Flight Time
400 GA, 50 trike
What is recommended air gap between the sensor and the ring gear teeth. The spec sheet I have for the sensor implies .005 in. This seems awfully close to me but it may be necessary for it to work. Can anyone help me with what works for you on your machine.
 
It needs to be as close as possible without touching. You should feel the magnetic field bounce as a tooth goes by.
 
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