Author Topic: interior access ports  (Read 527 times)

allentownsend

  • U20 Virgin
  • *
  • Posts: 5
interior access ports
« on: March 07, 2018, 07:59:21 AM »
I am considering replacing the two access ports (inside the cabin just forward of the keel) with larger ones.  Does anyone have any experience or comments on what a good hatch and or hatch size would be?

I am looking at increasing the diameter of the hatch, to about 10 inches, but I am concerned about structural integrity of the decking in this area.

thanks for any thoughts you might have.

Allen
U20#7

Bob Abelin

  • U20 Virgin
  • *
  • Posts: 13
Re: interior access ports
« Reply #1 on: March 17, 2018, 07:52:30 AM »
I wouldnít be too worried about it.  The loading there canít ever be very high since you canít walk on it. Fiberglass is tough stuff, especially if you have no square corners. If you are really concerned you could put a rigid backing plate under the deck before you installed the large port but itís probably not necessary.  Good luck. 

Bob

allentownsend

  • U20 Virgin
  • *
  • Posts: 5
Re: interior access ports
« Reply #2 on: March 21, 2018, 09:44:36 AM »
Tom,  thanks for your reply.  I am planning to replace the stringer in the water tight compartment this May.  This would be a good time to install a larger hatch.   I am now thinking of the Tempress 11x13 hatch which is bigger than I was thinking about.  It is rectangular with rounded corners.  Does this larger size cause concern?

thanks,
Allen

Bob Abelin

  • U20 Virgin
  • *
  • Posts: 13
Re: interior access ports
« Reply #3 on: March 21, 2018, 08:30:42 PM »
Square corners can be a concern (think the de Havilland Comet square windows), but if you round them enough it should be ok.  I'm going to replace my cockpit hatch with a Tempress hatch yet this spring.  I may put together a post about the process since the Tempress isn't an exact fit for that leaky Bomar.  I say just do it.  Unless you plan on doing MMA wrestling in the v-birth it should be fine.

Bob

Glenn VanHeel

  • Wannabees
  • U20 Old Timer
  • *
  • Posts: 88
  • #52 rescued from the bowels of society!
Re: interior access ports
« Reply #4 on: March 21, 2018, 10:52:26 PM »
I've installed larger rectangled hatches years ago. No worries.
« Last Edit: March 21, 2018, 11:14:04 PM by Glenn VanHeel »
I didn't fall from heaven, I got kicked out of hell !!!

Bob Abelin

  • U20 Virgin
  • *
  • Posts: 13
Re: interior access ports
« Reply #5 on: March 22, 2018, 09:06:14 AM »
Those look great!