Wilcharl From United States of America, joined Jun 2000, 1158 posts, RR: 3 Reply 2, posted (12 years 3 months 3 weeks 3 days 18 hours ago) and read 6780 times:
there are 4 Avco-Lycoming ALF-502 APUs under each wing, the exhaust points aft and by pointing it to the aft, our friend newtons laws of motion kick in and the opposite reaction thing makes the aircraft move forward
this thrust counteracts the drag. and not to get into aerodynamics, but the aircraft magicaly lifts off the ground thanks to the ingeniuus placement of the 4 apu's since they did this the 146 doesnt require any ENGINES!
Metwrench From United States of America, joined Aug 2001, 750 posts, RR: 2 Reply 3, posted (12 years 3 months 3 weeks 3 days 14 hours ago) and read 6775 times:
It's located in the empenage aft of the rear pressure bulkhead. Mfg. by Garrett, now a days known as Honeywell. When running at it's max it is capable of powering up one each; AC gen. DC gen, and two AC packs. However, if you try and utilize this unit to it's full capacity it is likely to explode and expell the turbine rotor right out the "S" duct onto the ramp as I have have witnessed.