[ARC5] reRU/GF sets

[Michael Bittner]

That's a good one and definitely gives the general idea.  Thanks for 
posting.  It looks to me like a blade on a 2-bladed helo which generally 
does not lead or lag in any given cycle.  The one I saw had the camera 
looking down on a blade of a 4-bladed helo in which the blades are hardly 
ever 90 degrees apart throughout any given rotation.  Mike, W6MAB


----- Original Message ----- 
From: "Lenox Carruth" <radios at sbcglobal.net>
To: "'Discussion of AN/ARC-5 military radio equipment.'" 
<arc5 at mailman.qth.net>; <kgordon2006 at verizon.net>
Sent: Tuesday, August 24, 2010 3:01 PM
Subject: Re: [ARC5] reRU/GF sets


> It's here:  http://www.youtube.com/watch?v=Ug6W7_tafnc
>
> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] 
> On
> Behalf Of Michael Bittner
> Sent: Tuesday, August 24, 2010 4:10 PM
> To: Discussion of AN/ARC-5 military radio equipment.;
> kgordon2006 at verizon.net
> Subject: Re: [ARC5] reRU/GF sets
>
> I once viewed a movie taken from a camera mounted on the mast of a
> helicopter and continuously focused on one blade.  The blade flaps up and
> down, bends in the middle, leads and lags its nominal position, changes
> pitch, twists within its length and even develops standing waves at 
> certain
> speeds.  The thing was basically doing the frug, the watusi, the boogaloo,
> and the funky chicken all at the same time.  See this flick and you'll 
> never
> want to get in a helo again.
>
> Shortly thereafter while I was on Naval Reserve cruise at Barber's Point,
> HI, an Sikorsky S-58 crashed in Chicago due to blade failier. They
> immediately grounded our SH-34J helos (same airframe as the S-58) and
> magnifluxed all their blades.  Sure enough, they found several with 
> serious
> fatigue cracks.  Like you say, "looking for a place to self destruct".
>
> Mike, W6MAB
>
>
>
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