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Carbon fiber solid seat pan by strips.

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    #91
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    I think I will go this route.


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      #92
      Heyyas, I'm almost ready to make the jump to this setup, but i've got a couple concerns.

      I weigh about 190lb, and when I transfer, I put alot of pressure on the areas I circled on Totol1's pic.

      When I talked to the dragon plate rep, and sent him the cad drawing of my TR, he had concerns about using two seperate sheets of CF. I planned on using one for the dump, and another for the seat angle (both being the 3/16" birch core).

      Has anyone with the CF seat pan had issues doing transfers with cracking?
      ---------
      C5-6 / '88

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        #93
        Originally posted by Reed-edm View Post
        Heyyas, I'm almost ready to make the jump to this setup, but i've got a couple concerns.

        I weigh about 190lb, and when I transfer, I put alot of pressure on the areas I circled on Totol1's pic.

        When I talked to the dragon plate rep, and sent him the cad drawing of my TR, he had concerns about using two seperate sheets of CF. I planned on using one for the dump, and another for the seat angle (both being the 3/16" birch core).

        Has anyone with the CF seat pan had issues doing transfers with cracking?
        That is quite a unique frame. 4.5" of dump over only 10" of seat rail is definitely extreme.

        I'd be concerned about the front section staying put with Velcro. At that angle, I would think that the areas where you apply pressure could create sheering forces strong enough to separate the Velcro.

        I'm also wondering if the reason you are thinking about CF by strips seat pan is to eliminate sag in your upholstery. On this particular frame, isn't some sag almost essential in order for your body to conform to those angles? Might a sheet of 1/16" or 1/8" ABS plastic inserted inside your cushion cover used with your current upholstery work better? A heat gun could be used to replicate the ergo bend angle so that it could be a single piece. It would add rigidity, but still have some give.


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          #94
          Originally posted by totoL1 View Post
          Anyway, do you think your chair with bolts is going to look cleaner than this one?
          Only with velcro attachment? How strong will it hold?
          Life is meaningles, though you create the purpose.sigpic

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            #95
            Originally posted by SCI_OTR View Post
            That is quite a unique frame. 4.5" of dump over only 10" of seat rail is definitely extreme.

            I'd be concerned about the front section staying put with Velcro. At that angle, I would think that the areas where you apply pressure could create sheering forces strong enough to separate the Velcro.

            I'm also wondering if the reason you are thinking about CF by strips seat pan is to eliminate sag in your upholstery. On this particular frame, isn't some sag almost essential in order for your body to conform to those angles?
            That chair remember me Felipe`s chair(Oracing owner)he`s a quad, but having that dump with ergo seat is very different than without it.

            With that dump maybe in transfers the front piece could move backwards to the ergo seat, but that have an easy solution, the seat need to be made in two pieces like this.


            Originally posted by sowseng View Post
            Only with velcro attachment? How strong will it hold?
            In this video in 1:17 to 1:25 you can see how strong hold the velcro i use.
            Last edited by totoL1; 19 May 2011, 3:58 AM.

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              #96
              Originally posted by SCI_OTR View Post
              I'm also wondering if the reason you are thinking about CF by strips seat pan is to eliminate sag in your upholstery. On this particular frame, isn't some sag almost essential in order for your body to conform to those angles? Might a sheet of 1/16" or 1/8" ABS plastic inserted inside your cushion cover used with your current upholstery work better? A heat gun could be used to replicate the ergo bend angle so that it could be a single piece. It would add rigidity, but still have some give.
              It's more of the seat pan sliding down..I hate adjusting it every couple days. Anyways, a neighbor works in the window industry and I talked to him about a plexiglass/lexan type seatpan. He going to mold two sheets of polycarbonate for me, one .25" and another .5" to see how it goes. He said the .5" would be pretty much bullet proof, but wasn't sure of the weight.. Hopefully in a month or so, I'll have something to show..

              I know I can handle the height changes because of the pan no problems. The weight interests me, as I know it's not going to be close to a CF setup.
              ---------
              C5-6 / '88

              Comment


                #97
                Originally posted by Reed-edm View Post
                He going to mold two sheets of polycarbonate for me, one .25" and another .5" to see how it goes. He said the .5" would be pretty much bullet proof, but wasn't sure of the weight.. Hopefully in a month or so, I'll have something to show..
                .
                that is going to be heavy, doing in it with a .5" sheet of playwood would be a better and cheaper.

                Another option you`ve got is doing it with layers of fiber glass clothes but using epoxi resine that give much more strenght to the fiber glass and will be much cheaper than CF.

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                  #98
                  Originally posted by Reed-edm View Post
                  It's more of the seat pan sliding down..I hate adjusting it every couple days. Anyways, a neighbor works in the window industry and I talked to him about a plexiglass/lexan type seatpan. He going to mold two sheets of polycarbonate for me, one .25" and another .5" to see how it goes. He said the .5" would be pretty much bullet proof, but wasn't sure of the weight.. Hopefully in a month or so, I'll have something to show..

                  I know I can handle the height changes because of the pan no problems. The weight interests me, as I know it's not going to be close to a CF setup.
                  That seat angle is between 20-30 degrees! What type of seat pan are you currently using? I wonder if using ADI's seat pan hardware could secure the front section on the frame?

                  One issue with Lexan is that it becomes brittle when cold.

                  Comment


                    #99
                    Originally posted by SCI_OTR View Post
                    That seat angle is between 20-30 degrees! What type of seat pan are you currently using? I wonder if using ADI's seat pan hardware could secure the front section on the frame?

                    One issue with Lexan is that it becomes brittle when cold.
                    I'm using the sling style seat pan now. It's a 22 degree angle. I'm still thinking of mounting options. Theres no way I'm going to drill into my frame to secure the pan, that much I do know.

                    Not too worried about cold, since I never stay outside when it's cold anyways.
                    ---------
                    C5-6 / '88

                    Comment


                      Originally posted by SCI_OTR View Post
                      One issue with Lexan is that it becomes brittle when cold.
                      FWIW, This hasn't been my experience. I've used it on a 4x4 that lives outside.

                      Comment


                        Originally posted by Reed-edm View Post
                        I'm using the sling style seat pan now. It's a 22 degree angle. I'm still thinking of mounting options. Theres no way I'm going to drill into my frame to secure the pan, that much I do know.

                        Not too worried about cold, since I never stay outside when it's cold anyways.
                        The ADI hardware would require drilling the seat pan only...


                        http://adirides.com/PDF/Install%20Se...e%20Manual.pdf

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                          Originally posted by SCI_OTR View Post
                          The ADI hardware would require drilling the seat pan only...
                          I looked on ADIs website and can't find the mounting hardware available as a seperate item. Sportaid has the seat foer $300 + another $200 for the mounting brackets..wow...
                          ---------
                          C5-6 / '88

                          Comment


                            @Toto: Have you come up with a final solution for your CF seat pan yet?

                            Anyone else besides Stephen212 and Eric[RB] have a new/unique design for solid seat pans (not aluminum).
                            "What is the first business of one who studies... To part with self conceit. For it is impossible for anyone to begin to learn what he thinks he already knows." -Epictetus (55-135) Greek Philosopher

                            Comment


                              Originally posted by Covathalis View Post
                              @Toto: Have you come up with a final solution for your CF seat pan yet?

                              Anyone else besides Stephen212 and Eric[RB] have a new/unique design for solid seat pans (not aluminum).
                              Sorry, but i don`t understand your question, i did my seat pan time ago, pics are in the thread.

                              Oracig are doing now cool aluminium seat pans by strips

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                                I didn't know if that was the final version or if you had changed the strips to something else. I assume it's been working well so far with no problems?
                                "What is the first business of one who studies... To part with self conceit. For it is impossible for anyone to begin to learn what he thinks he already knows." -Epictetus (55-135) Greek Philosopher

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