If a gas engine makes 20 hp at 3000 rpm I figure the ft/lbs of torque equals about 460.
Negating friction if the drive axle the engine turns goes 10 rpm with 20 hp the ft/lbs of torque equals about 10,000.
I was using the formula hp x 5252 divided by rpm of shaft
What I need to know if 10,000 ft/lbs is right. The drive axle has a sprocket hub with a 3/8th inch grade 8 bolt going through the hub and axle . It seems the 10,000 ft/lbs is right out of wack given the engine size.
The axle dia. is 1.25 inches so I figure the un-threaded part of the bolt would take up to 460ft/lbs of torque before shearing.
The shear on the bolt according to the chart is 80,000 pounds/inch square
Thanks ED
Negating friction if the drive axle the engine turns goes 10 rpm with 20 hp the ft/lbs of torque equals about 10,000.
I was using the formula hp x 5252 divided by rpm of shaft
What I need to know if 10,000 ft/lbs is right. The drive axle has a sprocket hub with a 3/8th inch grade 8 bolt going through the hub and axle . It seems the 10,000 ft/lbs is right out of wack given the engine size.
The axle dia. is 1.25 inches so I figure the un-threaded part of the bolt would take up to 460ft/lbs of torque before shearing.
The shear on the bolt according to the chart is 80,000 pounds/inch square
Thanks ED
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