[TowerTalk] PST61 Rotor Reliability?

David Gilbert xdavid at cis-broadband.com
Wed Dec 13 14:37:52 EST 2017


Finally someone understands.  I never meant my original reply about the 
PST-61D to devolve into this lengthy discussion, but I couldn't let it 
drop without the story being set straight.  My situation is indeed 
peculiar ... possibly even unique ... but some physically erroneous 
comments were popping up in some of the replies that needed to be corrected.

And yes, my options at this point appear to be either a PST-71D or a 
prop pitch from K7NV.  I've ruled out the PST-110D for two reasons ... 
one is simply the weight of the beast, and the other is the fact that 
Pro-Sis-Tel apparently went to a Hall Effect position sensor for it.  
Here is WA7NB's experience with the PST-110D:


He ended up going with a prop pitch (don't remember which size).  I 
emailed Array Solutions to get their side of the story on WA7NB's 
issues, but they never responded.

73 and thanks again,

Dave  AB7E

On 12/13/2017 11:28 AM, Jim Thomson wrote:
> ## Steve et all, the fellow has a very unique situation. His tower and pair of yagis are being hit by a mini tornado, thats  50-200 ft across, with  90 mph winds.
> In his one off case, adding a TQ comp plate will  do nothing, except to increase the load at the shorter end of the boom, and make things worse.   He doesnt
> have wind from just the usual single direction,  hes being hit by high winds from  several directions.....and  simultaneous.    Thats the worse nightmare one could imagine.
> The resulting TQ on his poor  PST61 must be insane.   Its one big corkscrew of a windload.
> ##  The only fix I can see that would work is  possibly either the larger  PST-71  or  PST  110,  115   or either small or medium sized PP  from K7NV.
> If it was me, I think I would opt to remove the  PST-61, get it repaired, sell it, then  replace it with a PP.   If you are going to spend $$  spend enough of it
> on a correct solution.   The PPs  all use planetary gears.  The final gear is driven in 3 places, every 120 degs.  Every other rotor is driven in only one place.
> And dont even think about using a m2  OR-2800  or  HDR-300, neither will last a week.
> Jim   VE7RF
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