Dempster 12 vs 12A

......when you need to get in the weeds.
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babraid
Posts: 86
Joined: Fri Jul 12, 2024 4:57 pm
Location: Denver CO

Dempster 12 vs 12A

Post by babraid »

The 12A was touted as an improved version of the 12 but I'm not seeing all that much difference. I see from the various discussions that the fan and vane were the same but the gearbox was different. What exactly made the 12A "better"? Was the 12A in fact a better windmill? I'm guessing it's not, based on the large numbers of 12s and few 12As around.

The 12A Mast pipe is larger - did that make it sturdier?
The 12A had an oil level indicator, and something about the lubrication of the pump rod swivel seems improved. Is that the key?

Any thoughts are appreciated!
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windybob
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Location: Ames Oklahoma

Re: Dempster 12 vs 12A

Post by windybob »

The 12 A is a whole different animal. The only thing that can swap over is the wheel, maybe tail. It's beefier, heavier, and I suppose at the time, it was considered the 'top dog' for durability in the Dempster lineup.
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babraid
Posts: 86
Joined: Fri Jul 12, 2024 4:57 pm
Location: Denver CO

Re: Dempster 12 vs 12A

Post by babraid »

Mmm...beefier....

Just had a thought (1st one today!) - the 12A gearbox is taller, would that mean the guide rods are taller and the entire internal mechanism is larger and/or more powerful?

Based on the windmills I see around here, the 12A hype never really caught on.
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