Yes, the gearboxes have "run dry" times. From memory the MGB is 53 minutes. I don't know about the IGB or TGB but they're under a lot less stress than the MGB.
As far as the "smoke/unburnt fuel" on engine start, it looks like steam to me. Had this quite a lot with 139 starts in cold weather with hot engines. Moisture would condense in the exhausts and give quite a good puff on engine start. Of course, the 169 doesn't have the monstrous exhausts of the 139!
I also note that the wind is up the tail on start.
Anyone know the critical wind quadrant/velocity for LTE????
Was the gear retracting on the climb? Unrelated but shouldn't it be after TDP when Vy is reached that the gear handle is moved? So hard to see details on the videos!
Last edited by noooby; 1st Nov 2018 at 19:22.