Re: Best way to raise Penthouse
Quote:
Originally Posted by BUFFALO
Too bad it didn't work out! That would have been a great assist!
Surprising that 300 lbs of total force wasn't enough.
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Intuitively I thought it would but after drawing it out I realized that there is almost no leverage when the roof is closed. I'm guessing it takes about 60-75lbs of force for me to push the roof open from a dead closed position (aluminess rack with 2 solar panels and 2 links removed on the main springs). After 6-12 inches the main springs kick in and the mechanical leverage increases. SMB electric motors push up from the center, similar to how you manually push the roof up. This is beyond my math skills but makes sense now that I see it.
SMB electric motors push up at the center.
This scissor lift calculator demonstrates how much force is needed based on the angle of the supports. As you increase the angle the amount of force decreases.
http://www.engineersedge.com/calcula...tom-loaded.htm
Any mechanical engineers in the house?
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2006 E350 6.0PSD 5R110, SMB 4X4, RB-50, ARB lockers front/rear, Aluminess galore, AMP steps.
Callsign KK6GIY
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