Posted by 300jk on December 24, 2020 at 10:05:07 from (172.58.225.100):
Just something I’m curious about and I’m sure somewhere there is a mathematical formula to figure it out. An example I’ll use is this. We have an Oliver 1650 gas tractor we moldboard plow with. Tractor is rated at 65-66 hp. Growing up we were always told by dad to run the tractor at around 1700-1800 rpm. I believe the the engine has an operating rpm of around 2400 rpm at wide open throttle . How much of that 65 hp are we using at say 1700 rpm ? We never ever use any tractor at full rpm even for pto work where 540 pto rpm is. Usually around 2000 for pto work like making hay ect. I do realize pto equipment is designed to run at 540, but that’s not how I was taught. I do however run my 300 wide open when blowing snow.
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