[PSUBS-MAILIST] Ships hatch

[hank pronk via Personal_Submersibles]

John,My hatch dome is 1 inch thick with a 2 inch thick conical ring 2 inches wide.  The weight is 130 lbs at 18 inches dia.  I have incorporated one torsion spring but not sure if I will use it.  It is easy enough to lift open.  You will need a heavier set of springs is all.  Do you have clearance for thicker springs.  I am using one spring only and it works well.  My spring is from a trailer door or trailer ramp.  Two of those would lift your hatch.Hank 

    On Tuesday, March 22, 2016 7:24 PM, John Kammerer via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hank:
 
You mentioned in a earlier post that your hatch was 2' thick. What is 
the diameter and how much does it weigh? How do you open it? Do you have 
a torsion spring or is it hydraulically operated.
 
I have two 26' diameter 1' thick access hatches each weighing in at 200 
lbs. each I had a torsion spring made, rated at 2100 inch lbs. to 
provide a lift assist of about 160 lbs. its not enough.
 
Any suggestions anyone.
 
John K.
(203) 414-1000

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20160323/994bc4f8/attachment.html>