Originally Posted by
flynavyj
I'd assume you'd need one heck of an APU. For the EMB, it's a single stage axial flow diesel engine, and doesn't create enough bleed temperature to function the anti-ice systems. Now, if you had a JT8 or something back there, you'd be ready to rock.
Well the APU in the CRJ 700/900 isn't supposed to run the A/I systems, but I've heard it could, hypothetically. Maybe the ducting isn't correct for that, or something. I haven't looked into it, and I've never tried it. For the size of the Q400, perhaps that APU wouldn't be that big of a deal in the Q, and considering it is Bombardier - it might actually be doable. It's just an interesting thought.