[TowerTalk] PST61 Rotor Reliability?
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,
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
> TowerTalk mailing list
> TowerTalk at contesting.com
More information about the TowerTalk