Thank you for your answers...
Specially to Phalconphixer for the thought behind the DC usage, very satisfying to finally get an answer to an engg design issue...
@ TSP: Thank you for your responses too...However this is a slight deviation for the answer for Q 3....I looked up the CODDE 2 could not locate the procedure... had sent a mail to one of my instructors for the EASy program in CAE and got the following answer regarding the APU shutdown for T/O
" If APU is left running at takeoff, the APU Bleed valve will close and one will get a APU FAULT msg on the CAS as soon as power is advanced for takeoff or shortly thereafter, at speed below 80knots (keeping with the CAS logic), for this reason its recommended to shut down APU prior to Takeoff"
Am I missing something here? also like I said I could not locate the said procedure in CODDE2, could they have changed that in the latest revision??
Cheers...