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Re: Prony/pony brakes
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Posted by Joe Evans on December 08, 2004 at 14:53:31 from (67.129.216.237):
In Reply to: Re: Prony/pony brakes posted by JT on December 08, 2004 at 13:56:13:
My brother measured the dimensions of that beast at one time, but I don't have those figures with me. Estimation is 60" major diameter, 24" minor diameter, and the paddles are roughly 18" square. This fan is reportedly rated for 100 HP, that is to say that it will load down a tractor or steam traction engine enough to allow them to develop 100 HP. This thing will flat bury any tractor we've belted to it. Of course, the only way to drive it is by way of the belt pulley, so modern tractor with hi HP ratings don't get hooked to it. For a small tractor test...geez I don't know what the dimension should be. Food for thought: using Basic Fan Laws, if you want to double the RPM of the fan, 8x the HP is required. Say, if 10 HP will get you 150 fan RPM, you need 80 HP to get 300 RPM.
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