PPRuNe Forums - View Single Post - Q1. PFLs in Fuel Injected engines, and 'warming' the engine?
Old 22nd May 2010, 08:20
  #1 (permalink)  
SIMUL8D
 
Join Date: Aug 2008
Location: Australia
Posts: 27
Likes: 0
Received 0 Likes on 0 Posts
Question Q1. PFLs in Fuel Injected engines, and 'warming' the engine?

Hi all.

I have a quick question for all the Instructors out there. In a New C172SP with a fuel injected and 'closely cowled' engine, is there still a requirement to warm the engine on descent? Cessna suggests that it's not required.
  • If it was matter of a carby engine then of course this should be done.
  • If a matter of CHT, then at what temp should it be done? (we used 105 degrees C in the CT-4B).
  • If it's matter of clearing the plugs, then surely a run up to 1800rpm and straight back to idle again will achieve little, other than upsetting the students glide?
  • I have also heard of some suggesting that they only run up the engine periodically on descent to ensure that the engine is still running? I can understand that, but it only needs a slight throttle advance to achieve that goal.

I would welcome your experience on the matter.

Cheers
SIMUL8D is offline