1) The gen assisted (on off on) method was developed to maximize gen use during start without blowing current limiters. BB1770 has gen ties rather than current limiters so no need to turn the offside gen off for the initial starter cranking.
2) High idle to have the generator turning at a higher RPM, reducing torque demand from the generator on the engine. Basically it's easier on everything.
3) The reason for an autofeather system is to help deal with an engine failure in low speed / high power setting situations where you are close to your VMC and loss of control becomes a danger. This doesn't apply to cruise flight. As stated, if you are going to attempt a relight you are far better off with the engine windmilling.
Last edited by ahramin; 27th Aug 2013 at 21:36.