Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

technical problems with supercooled diesel fuel in C172 Thielert?

Tech Log The very best in practical technical discussion on the web

technical problems with supercooled diesel fuel in C172 Thielert?

Old 9th Dec 2007, 22:51
  #21 (permalink)  
 
Join Date: Aug 2007
Location: Germany
Posts: 82
I for myself would think twice about flying with a SE diesel as much as with the DA42 twin diesel engine ( you may check the various incident/accident reports on that). It just takes an corrosive battery line or contact for the engines to quit, at least on the DA42, so forget about ME safety with fadec and so on on the DA42. Don't know though how it works on the 172 but it can't be much different. There have been problems with the diesel powered DA40 as well, again, it just takes anything abnormal in the electric circuits for the engine to quit service. It once happened with a DA40 that the FADEC initiated the emergency "program" for the engine which resulted with the max. power decreasing to 40% so you end up in a more or less controlled descend being unable to maintain altitude. Can anyone enlighten us about the construction / reliability of those thielert powered cessnas?
plugster is offline  
Old 3rd Jan 2008, 13:53
  #22 (permalink)  
 
Join Date: Apr 2007
Location: Europe
Posts: 82
The Thielert engine has two limitations about fuel temperature: one for starting (-22F) and one to have it running.

What is important to know about Diesel engines is that about 30% of the fuel is not used in the engine and comes back to the tanks - and this is how you will keep it warm enough, even at FL100 !

If you fly the retrofitted C172 you will see that the "BOTH" position on the fuel selector is gone. The warm fuel goes back in the tank in use, so you will have to switch periodically to avoid fuel imbalance but also to keep both wings "warm".

On the good side, the engine management system will warn you if fuel temperature is too low.

More about it in http://www.plasticpilot.net/blog/200...e-like-it-hot/
PlasticPilot is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.