PPRuNe Forums - View Single Post - What exactly does a Tacho count?
Thread: What exactly does a Tacho count?
View Single Post
Old 23rd August 2003 | 03:06
  #13 (permalink)  
Keef

Official PPRuNe Chaplain
 
Joined: Apr 2001
Posts: 3,498
Likes: 0
From: Witnesham, Suffolk
Ignoring for the moment the "correct" names of the instant RPM readout (which I understand) and the hour meter (ditto),

[b]What]/b] units exactly does the hour meter count?

I remember in my distant youth the farm tractor (no speedo etc) had an RPM gauge and an hour meter, the latter with the legend "Hours at 1800 RPM".

So: our aircraft "hour meters" count hours at what number of RPM?
Keef is offline