HeloPitts Posted December 19, 2006 Posted December 19, 2006 http://s97.photobucket.com/albums/l240/fly...aul2004-40C.flv Pretty cool video, stole it off of pprune Quote
67november Posted December 19, 2006 Posted December 19, 2006 the pilot is a member of VM. cool stuff. Quote
oldcobrapilot Posted December 19, 2006 Posted December 19, 2006 What phenomenon is in effect? Friction of the M/R on the cold air? Quote
Eric Hunt Posted December 19, 2006 Posted December 19, 2006 Comes from the drop in temperature as the saturated airflow is accelerated over the rotor and downwards. Note that it didn't start until he pulled more pitch with the load. Quote
C of G Posted December 20, 2006 Posted December 20, 2006 the pilot is a member of VM. cool stuff. Pardon my ignorance, what is "VM"? Thanks................. Quote
Firepilot Posted December 20, 2006 Posted December 20, 2006 I had a similar situation happen to me in the winter while doing wildlife surveys. I was flying along, looked at my shadow on the ground and thought I was on fire. It looked like the aircraft was smoking. As I turned around to check, we saw a "trail" of condensation behind us. Each time we passed through these inversion layers in the mountains the same thing would happen. Wish I would have had a camera Quote
67november Posted December 20, 2006 Posted December 20, 2006 Pardon my ignorance, what is "VM"? Thanks................. Verticalmag.com great place, canadian site mostly. Quote
Bristol Posted December 20, 2006 Posted December 20, 2006 Is there any danger if ice accumulating on the blades? Quote
brushfire21 Posted December 20, 2006 Posted December 20, 2006 Way cool video, I have heard about this phenomenon (sp) but its cool to actually see it! Quote
Linc Posted December 20, 2006 Posted December 20, 2006 (edited) Since it didn't happen on the termination of approach, which is also a significant pitch pull from the descent, and he hovers in circles for a turn or two while they're hooking up the load, I wonder if it wasn't induced by the helicopter's presence in the area; "warm" air from the exhaust wicking moisture into the area... Edited December 20, 2006 by Linc Quote
FlyNHighNFast Posted December 21, 2006 Posted December 21, 2006 That was great, too bad it was into the sun. Quote
mrose Posted December 23, 2006 Posted December 23, 2006 It must have been very cold. Never have seen it in a smaller ship. In the Alaska interior we would sometimes fly through "Ice Fog" The real stuff that forms in -25F and lower. It would put a layer of hard rime type ice on the leading edge's in 2-3 minutes on approach to the comm site. It required about 15-20% extra power then. We would land, knock it off (a 1 hour job) and work again. I have a picture of us in that stuff with the tower outline in view up front. No extra vibrations just a slow power drain. Merry Christmas! MROSE Quote
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