Re: OT - B17 warbird question

I don't know the normal starting sequence for the B-17, it probably varied depending on conditions. There are several things that govern the sequence for multiengine aircraft. As mentioned, normally the first engine started has a generator on it. That way electrical power is available throughout the aircraft and can start the other engines. (if they are electrically started-some use air or pyrotechnics) Which engine has the hydraulic pumps supplying the brakes comes into play as well. For taxiing, a four engine aircraft will almost always start the outboard engines to give more turning authority using differential power on the outboards. Sometimes it was the PIC's preference. I've seen videos of four engine aircraft taxiing on the two inboards. Saving fuel is a consideration, and often the last two engines were not started until the aircraft was near the runway for fuel savings.