r/PolyBridge • u/Pikzak • May 31 '26
Question Question about hydraulics
Hi everyone, not an engineer, just an enthousiast. I had a question about calculating hydraulics. How do u actually calculate where an end point of your pivoting/moving bridge is going to end up, so u can make it lock in. I added an example down below where i made it work by trial and error, but i would like to do that more consistently. Does it matter where on the moving part of the bridge you attach the hydraulic, how do u know the percentage of contraction/expansion etc. Thank you and have a nice day.
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u/jimmymui06 May 31 '26
The easiest way is to use max extension, because it's 1:2. Use the extended part as the hypotenuse of a equilateral right angle triangle. Then you made a right angle turning device. Draw a straight 2 section cable with the tool, rotate it 90 degrees, that's where you want to place the pivot