[TowerTalk] Heavy Duty Rotor

[Jim Lux]

On 9/6/11 2:08 PM, David Jordan wrote:
> PPM's are great if you have $4,000 for one...
>

Exactly... seems you could find an off the shelf collection of parts 
that get you there, perhaps with a bit of bracket fabrication (mind you, 
where I used to work, the words "all you gotta do is fabricate..." were 
guaranteed to result in giggles if not outright guffaws)

But these days, $300 gets you a brand new 2HP TEFC motor, another couple 
hundred gets you a variable speed drive for it. The gearbox is going to 
be a bit tricky, because you need several stages if you're doing 
standard planetary gears to get down to the 1 RPM sort of speed you want 
from 1750.  But even so, I don't see it being more than $1000-1500 all told.

I suppose the market is SO tiny that it's not worth it for someone to do 
anything more than a custom one-off.  The existing products from M2 or 
AlfaSpid or whoever are sufficient for 99%, and for the 1%, you're going 
to be cobbling up something custom anyway.