Hi Everyone,I am calculating the reaction Forces on an Engine Hoist for a project for my statics class. I am using the measurements from a real hoist and I wanted to know if someone one can check If I am doing the calculations right. I know the top portion of the calculations are correct for ABC but I'm not sure If I did the calculations for EDF correct. Can anyone help me?
There is a problem somewhere. If you look at the hoist as a rigid body the two vertical reaction at the base must sum to 1200 LBS (you can't react more load than is applied). The key is to know the location of the engine center of gravity relative to the hoist supports on the base. Then it is just a matter of summing moments about one of the base supports. Free bodying each individual piece gets a little tricky because it appears you can carry moment across the joint at D. I disagree with the axial force you show in member AD. I get a tensile axial force in AD (at point A) of 4704 LBS (4286 / cos 24.33 degrees). I agree with the 5486 LB compression load in what appears to be a shock absorber at B.
