Chapter 4 – Installation
Honeywell Confidential: Use or disclosure of information on this page is subject to the restrictions on the title page.
13841 Rev A
85
4.5.8 Geared Reciprocating Engines
To determine the engine revolutions per minute (RPM) from the
photocell, check the engine data plate and apply the resulting
ratio to the tachometer reading from the propeller.
NOTE: The propeller tachometer signal from the
photocell does not match the engine tachometer RPM.