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 Powered hydraulics for a trap door 
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Location: Kent
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Real Name: Andy
If you want to try pneumatic I have this cylinder cluttering up my shop. I think it’s got a 35” stroke.
43 1/2” retracted. It’s new, never used. Free if you want it.
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Thu Jan 03, 2019 9:34 am
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Real Name: elwood
I reccomend you check out wilson trap doors


Thu Jan 03, 2019 9:48 am
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Location: Nisqually Valley
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Another vote for pneumatics


Thu Jan 03, 2019 10:21 am
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Sat Jan 05, 2019 6:27 pm
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AR15L wrote:
Reading posts like this makes me wish Boeing Surplus was still open. :wink05:


no shit liked getting "spoons" and tools from them.


Brian that is indeed cool.

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Sat Jan 05, 2019 7:08 pm
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Location: Puyallup
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I ordered from these guys when I needed to replace the struts in my truck tool box: http://www.liftsupportsdepot.com
You’ll have to do some math / design if you’re going to build a door like that pictured. Their web site has tools to help you find the right strut for your application.

Pneumatics & hydraulics need power - or a hand pump - to work. Just unlatch for struts to do their thing. Not saying one is better than the other.


Thu Jan 10, 2019 10:45 pm
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Location: Rainier
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You can also look thru McMaster-Carr or Grainger web sites. Plenty of mech supplies on both sites


Fri Jan 11, 2019 12:13 pm
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Thanks for all the input, fellas This thread was moved , I just found it again. :bigsmile:

Andy, appreciate the offer.

For now our build is on hold due to an unfair shared well agreement that may be going to court.

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Wed Jan 16, 2019 7:53 am
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Wed Jan 16, 2019 12:44 pm
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Two words: Counter Weights

Gas struts, hydraulic systems, and electric winches can fail

Gravity isn't just a concept, it's a law

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Wed Jan 16, 2019 5:09 pm
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RocketScott wrote:
Two words: Counter Weights

Gas struts, hydraulic systems, and electric winches can fail

Gravity isn't just a concept, it's a law

Gravity is the boss of you.

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Wed Jan 16, 2019 5:37 pm
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