View Full Version : Sikorsky inflight/hover M/R Blade film
yellowbird135
24th Oct 2006, 09:10
I was just reading an older thread and saw a reference to this film that supposedly was shot on an S-51.
I've heard stories about this film, but never been able to find it somewhere.
Any suggestions?
Cheers YB
mongoose237
24th Oct 2006, 10:53
I think this is what you're after (http://www.griffin-helicopters.co.uk/videos/ROTOR.avi)
yellowbird135
24th Oct 2006, 11:28
Thanks a lot, Mongoose
story was that in those days some pilots who saw this movie quit flying. I won't quit but it is amazing footage, especially with the (filming) hardware available in those days.
thanks YB
NickLappos
24th Oct 2006, 13:00
That is actually a Sikorsky S-56 (CH-37) blade, and it is being flown directly over the Sikorsky main plant in Stratford Connecticut, USA. The blade is a typical aluminum spar blade of that period, but its motions are quite similar to those of a modern blade. When I started at the Sikorsky test pilot's office in 1974, that film was being used in the training school and shown to all.
I don't think anyone ever quit because of it, frankly, we are all beyond such rational decisions, aren't we??
I Build 92's
24th Oct 2006, 15:52
What file type is this blade film?? Wont play on my Windows Media player :{
92, try this http://www.free-codecs.com/download/K_Lite_Codec_Pack.htm
GoodGrief
24th Oct 2006, 16:13
Original comment:
Die Blattenden gleichen durch ihre Elastizität die Wirbelkräfte aus.
Diese Aufnahme wurde während des Fluges von einer Kamera gemacht, die an der Vorderkante eines Rotorblattes montiert war. Bei jeder Umdrehung ist der Heckrotor zu sehen.
Würden die elastischen Rotorblätter die Wirbelkräfte nicht absorbieren, so würden sie auf die Aufhängung und den Rumpf übertragen. Die Vibration würde den Helicopter zerstören.
Translation:
The blade's flexibility compensates vortex forces.
This footage was recorded during flight having a camera mounted to the leading edge of a rotorblade. The tailrotor is visible at every revolution.
Would the flexible blades not take the vortex forces they would be transmitted to the mounts and airframe.
The vibration would destroy the helicopter.