747 Apu
 

Just wondering what APU the 747's use?
The Classics and the -400 I'm after - a guy on another forum reckons they're a type of Garrett TPE331 core but I thought they were a lot bigger than that.

Classic - GTCP660-4 (Garrett/Honeywell).

B747-400 - Pratt & Whitney PW901A (twin 90KVA generators).

A380 - PW980 (derivative of the PW901A)

If the guy you are talking about was me in this post:
http://www.pprune.org/forums/showthread.php?p=4080274#post4080274
I mentioned the B757 not the 747. Honeywell bought Garrett and the model numbers are now a little bit different. You can see them here:
http://www.honeywell.com/sites/portal?smap=aerospace&page=Power_Systems3&theme=T5&catID=CB6 099334-14AB-C264-AB94-8E47224CA642&id=H0835BFA3-4DC0-F133-8CF9-9F160BDCE9DC&sel=3
and here:
http://www.honeywell.com/sites/portal?smap=aerospace&page=Power_Systems3&theme=T5&catID=CB6 099334-14AB-C264-AB94-8E47224CA642&id=H0835BFA3-4DC0-F133-8CF9-9F160BDCE9DC&sel=3
Tailwinds
Edited to include this other list:
http://www.forecastinternational.com...s/644_2005.pdf

Ta, WT, just what I was looking for.

Ppppp no not you, a guy on a car forum. :)