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  • #91
    120 ergo seat is not much, i know they give it like std measurement, but i never have understand why 120 like std, that`s for a kid, you will be more confortable in a 140mm.

    Comment


    • #92
      I did wonder if it was maybe a bit short, but then I read this in depth document which seems to be recommending 120mm.

      http://www.49bespoke.com/file_librar...go_seating.pdf

      I can't imagine an extra 20mm would make much difference would it?

      Comment


      • #93
        Ergo measure is tricky, I tooked 7" (17,78 cm) and it's great!
        The right measure supposed to be one or two fingers from ischial tuberosity, I used that technique

        Comment


        • #94
          I tried different length wooden wedges to find out what ergo was right for me; I ended up at 7" (180mm), too. Then I bent and shimmed up my solid seat pan accordingly.
          Chas
          TiLite TR3
          Dual-Axle TR3 with RioMobility DragonFly
          I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

          "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
          <
          UNKNOWN AUTHOR>

          Comment


          • #95
            Thanks Nick - that sounds like a good technique. I think I'll change it to about 150mm anyway.

            Comment


            • #96
              Originally posted by Steviewo View Post
              I did wonder if it was maybe a bit short, but then I read this in depth document which seems to be recommending 120mm.

              http://www.49bespoke.com/file_librar...go_seating.pdf

              I can't imagine an extra 20mm would make much difference would it?

              what more influence in your ergo seat depth will be how fat are you, because as more fat you are more forward your ischio will be, I use 140mm

              Comment


              • #97
                17x16 72° Oracing from Bike-on for EZ Lock pin

                17" Seat width
                16" Seat depth
                72 Degree front angle
                19" Front seat height
                17" Rear seat height
                17" Seat to footrest height
                V front frame - 2"Taper
                9" wide aluminum footrest adjustable height/angle
                Fixed Ergo backrest
                2.5” deep under seat rigidizer bar (space for the SmartDrive battery)
                0 Center fixed gravity
                1" Rear wheel spacing
                3 Degree camber
                5 x 1.5" soft roll F/Frog leg suspension
                24" Oracing wheels – 1 inch Schmicking axle
                Short tab push rims
                Oracing ultra light red stitchedupholstery all around. Red stitched Oracing logo on back
                Carbon Fiber seat pan.
                fixed aluminum side guards w/o rim – (wheel rim height + front tire outside diameter length
                Matt black frame -
                Welded custom lower frame and aluminum plate to attach EZ Lock pin (7.5” off the ground and 18” from the front of the chair to the pin)

                View here

                I contacted Stephen@bike-on.com and between dozens of emails, quotations and swift professional feedback. He got my attention sharply focused on Oracing. After many Leonardo da Vinci style CADs and Stephens incredible number crunching wizardry, Oracing trumped. All their wheelchairs are handcrafted exactly according to their client's special needs. They pay attention to small details and they shine in the art of design. These qualities set Oracing above their competitors and they are a strong contender in the wheelchair arena. From the time my order was placed to completing my chair – Just over a week.

                Comment


                • #98
                  I seriously hope they can restore all of the images lost as a result of the vBulletin upgrade because this thread was an extremely valuable and unique source of information.

                  For those of you who were not familiar with the concept of "Occupied Frame Length" (OFL) before the software was upgraded, you may find this post to be a helpful tutorial. OFL can be an extremely useful dimension because it provides a direct link between an existing chair and the specs for a proposed replacement chair.
                  Occupied Frame Length Is Defined As The Distance From The Front Of The Back Post To The Front Of The Footrest.


                  Keep in mind that I came up with the name for this term because there was no standard term to describe this dimension. Most manufacturers do not normally include it as a standard part of their CAD drawings, so it must be specifically requested. It is measured on an existing chair by rolling the chair so that the footrest touches the wall and measuring the distance from the front of the back post to the wall. OFL proved to be invaluable in overcoming the challenges we faced in spec'ing a new TR3 that would be based on an old chrome moly Terminator used by a C6 quad. While it was no longer his primary chair, he reported that the Terminator's "dump" gave him better trunk stability and was easier to push than any of the titanium rigid frames he had owned. He reported that the main disadvantage of it was that he had difficulty transferring out of it because due to the 80 degree frame angle and lack of rear wheel clearance. Going with an 85 degree frame angle and 1" longer custom frame on the new chair would solve the transfer problem, but there were a couple of other issues. It wasn't possible to get the Terminator's 14" rear STF height on the TR3 with a 24" rear wheel (The lowest we could go was 14.5"). How would we get the same seat angle with a different rear STF height and frame angle? The first thing we needed to do was get an accurate OFL from the Terminator...

                  [IMG]/vb5/filedata/fetch?id=2917631[/IMG]

                  Note that the measuring stick is at the bottom of the back post and parallel with the ground. Otherwise, there will be a much greater margin for error...

                  [IMG]/vb5/filedata/fetch?id=2917632[/IMG]

                  This chair was somewhat unique because we didn't know what the front STF height should be if we wanted the seat angle to be exactly 15 degrees. As a result, we requested the CAD be drawn using the following specs:
                  • Seat Depth: 16"
                  • Custom Frame Length: 17"
                  • Front Frame Angle: 85 Deg.
                  • Rear STF: 14.5"
                  • Occupied Frame Length: 22"
                  • Seat Angle: 15 Degrees
                  TiLite obliged by providing the following CAD for these specs...

                  [IMG]/vb5/filedata/fetch?id=2917634[/IMG]

                  This is the new TR3 that was built as a result of those specs. It has the same seat angle, a nearly identical OFL, but includes more frame tubing in front of the wheel for transfers...

                  [IMG]/vb5/filedata/fetch?id=2917633[/IMG]

                  At the beginning of this post, I mentioned that OFL provides a direct link between an existing chair and a proposed chair. Here's proof.

                  [IMG]/vb5/filedata/fetch?id=2917630[/IMG]

                  Comment


                  • #99
                    Yep, OFL sure is a good thing to know. Here's a pic of my CAD showing OFL, definately helped getting a perfect seating match to an existing chair, with a significantly different front end configuration on the new one [ATTACH=CONFIG]n2917829[/ATTACH] [IMG]/vb5/filedata/fetch?id=2917829[/IMG]

                    Comment


                    • SSCA installed (wheelie prohibited)

                      This post is not manufacturer CAD for chair, but it is my cad and pics for the modification of a TiLite DU100069 - Single Swivel Caster Anti-Tipper (SSCA), which I designed for a specific, controversial desire I had: spinning wheelies while free dancing. (Some CCC members think I'm nuts ) I have some dysmetria, so I need anti-tippers because holding wheelies reliably is not possible. I was bending the mounting brackets of standard anti-tippers by spinning on them,so I ordered an SSCA through the VA. When it arrived, it's configuration prevented me from doing wheelies, so I designed, tested, prototyped, and hired a fix (my auto mechanic friend made the bends). I call them Wheelie Bends (WB). My SSCA is now a SSCAWB .

                      Note: my friend has worked with titanium previously on race cars, so he was eager to do it. The bends are obviously field done, but the SSCAWB works wonderfully. When I shared the design with TiLite via email, they said they would make an SSCAWB for me according to my design, but they'd need to make one from scratch, and the DMES (VA) would need to order it for me. My friend bent the one I already had for free (I tipped him $40). I'll get TiLite to do one for my next chair.

                      Anyway, for those of you who are interested in doing spinning wheelies without damaging your anti-tippers, consider a SSCAWB, but you'll need to figure out the proper bend for your chair. This design works for my chair; it may not be safe on others. The concept is safe, but the specifics may vary.

                      Discussion Thread
                      Last edited by OldGrumpyDad; 03-31-2020, 04:16 PM. Reason: no really, i did fix it
                      Chas
                      TiLite TR3
                      Dual-Axle TR3 with RioMobility DragonFly
                      I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

                      "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
                      <
                      UNKNOWN AUTHOR>

                      Comment


                      • 17x16+1.5 TR3.

                        85deg front angle
                        15" rear STF
                        18.5" front STF
                        5" casters
                        25" rear wheels

                        CAD: https://www.dropbox.com/s/jo1q086nt43k6gn/tr3-cad.jpg

                        Comment


                        • Originally posted by -scott- View Post
                          17x16+1.5 TR3.

                          85deg front angle
                          15" rear STF
                          18.5" front STF
                          5" casters
                          25" rear wheels

                          CAD: https://www.dropbox.com/s/jo1q086nt43k6gn/tr3-cad.jpg
                          nearly identical to mine that I just speced.
                          17x16 +2in
                          85 frt
                          4x1.5 soft roll
                          25 in wheels
                          15 rsh
                          19 fsh
                          welded back
                          fixed side guards
                          Bike-on.com rep
                          John@bike-on.com
                          c4/5 inc funtioning c6. 28 yrs post.
                          sponsored handcycle racer

                          Comment


                          • New TR3

                            It's here!

                            TiLite TR3 Frame Finish: Natural Titanium Satin
                            Color Anodize Package: Sapphire
                            Seat Width: 13''
                            Seat Depth: 13'' + 1''
                            Front Seat Height: 17"
                            Rear Seat Height: 15"
                            Front Frame Angle: 85?
                            Seat to Footrest: 13.5", set at 12.5 - Titanium with ABS Cover
                            Seat Back Type: Folding Titanium Adjustable Height, 8.5''-11.5'' - set at 10''
                            Tishaft Back release bar: Aluminum
                            Seat Back Options: 4''? Deep Backrest Rigidizer Bar
                            Seat Back Angle: 89?
                            Center of Gravity: 2.5
                            Rear Wheel Spacing: 1"
                            Front Casters: 4'' Light-up casters - Waiting on 4'' Soft-rolls
                            TiLite Standard Fork - Waiting on FL Unitines
                            Rear Wheel Type / Size: Spinergy LX 24"
                            Axles: Titanium
                            Rear Wheel Tires: Schwalbe Marathon Plus Evolution
                            Handrims / Mount: Natural Fit The Surge LT
                            Wheel Locks: Composite Scissor Locks
                            Upholstery: Black
                            ❑ Back Upholstery: Tension Adjustable by Straps
                            Camber: 2?
                            Camber Tube: Aluminium
                            Side Guards: CF, Removable
                            Seat Cushion: Ride Forward

                            (Apologies for the huge and sideways pictures, I tried everything!)

                            Click image for larger version

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                            Comment


                            • My new TR3 with two axles and ergo seat

                              SPECS:
                              | TRRFR1 REINFORCED FRAME $
                              | TRFF18 PAINT - WHITE PEARL
                              | **DU100073- MIXED COLOR ANO PACKAGE**
                              | TRRSW1 SEAT WIDTH - 17"
                              | TRFSW1 FRONT SEAT WIDTH TAPER - NONE
                              | TRSD1 SEAT DEPTH - 16"
                              | TRERG1 ERGONOMIC SEAT - 6" $
                              | TRFSH1 FRONT SEAT HEIGHT - 19.25"
                              | **DESIGNS UNLIMITED- CUSTOM FRONT SEAT HEIGHT**
                              | TRRSH1 REAR SEAT HEIGHT - 15.5"
                              | TRFA1 FRONT ANGLE - 80
                              | SEAT TO FOOTREST - 13.5"
                              | TRFTR12 FOOTREST - FLIP-BACK K40/K37 $
                              | TRFE2 V-FRONT END - 11"
                              | TRSB15 NON-FOLDING FIXED HEIGHT TI BACK $
                              | **DU100031- FIXED HEIGHT PUSH HANDLES ON BACKREST**
                              | **PUSH HANDLES 20" FROM SEAT SLING**
                              | SEAT BACK HEIGHT - 7"
                              | TRSB12 4" DEEP BACKREST RIGIDIZER BAR
                              | TRSB13 CUSTOM HT RIGIDIZER - 5" $
                              | TRSBA3 SEAT BACK ANGLE - 90
                              | TRCOG1 CENTER OF GRAVITY - 3"
                              | TRAMP1 AMPUTEE ADAPTER E0959 $
                              | TRRWS1 REAR WHEEL SPACING - 0.5"
                              | TRCBR12 CAMBER PLUGS - ADJ REAR WHEEL
                              | TRCBR9 ADDITIONAL REAR WHEEL SPACERS
                              | TRCBR1 CAMBER - 4
                              | TRCBR15 CAMBER TUBE - ALUMINUM
                              | TRCBR13 ADDITIONAL CAMBER - 6
                              | **0.5" RWS ON ADDITIONAL CAMBER**
                              | TRCBR5 ADD CAMBER TUBE - ALUMINUM $
                              | **DU100062- 19" CUSTOM CASTER PLACEMENT**
                              | TRFW30 5"x1.5" LITESPEED ALUMINUM SOFTROLL $
                              | **MOUNT CASTER IN MIDDLE FORK HOLE**
                              | FRONT WHEEL HUBS - SILVER
                              | TRFK1 FORKS - TiLite STANDARD
                              | TRTFS1 FORK STEMS - TITANIUM $
                              | REAR WHEEL SIZE - 25"
                              | TRRW14 WHEELS - TiLite SHADOW $
                              | TRAXL1 AXLES - STAINLESS QUICK RELEASE
                              | TRRTR3 TIRES - PRIMO TREADED $
                              | TRRIM10 HANDRIMS - THE SURGE
                              | TRRIM7 HANDRIM TABS - LONG
                              | TRWLK9 WHEEL LOCK - COMPOSITE SCISSOR LOCK $
                              | TRBUP0 BK UPH - OMIT
                              | TRSUP2 SEAT UPH - TENSION ADJ BY STRAP $
                              | TRSDG12 SIDE GUARDS - CF FENDERED REM $
                              | **SET FOR 26" REAR WHEELS**
                              | TRGRD1 SPOKE GUARDS - CLEAR/TIMOTION K0065 $
                              | **DU100069- TITANIUM SINGLE SWIVEL ANTI-TIP**
                              | TRLUG1 LUGGAGE CARRIERS $
                              Attached Files
                              Last edited by chasmengr; 02-13-2016, 03:55 PM.
                              Chas
                              TiLite TR3
                              Dual-Axle TR3 with RioMobility DragonFly
                              I am a person with mild/moderate hexaparesis (impaired movement in 4 limbs, head, & torso) caused by RRMS w/TM C7&T7 incomplete.

                              "I know you think you understand what you thought I said, but what I don't think you realize is that what you heard is not what I meant."
                              <
                              UNKNOWN AUTHOR>

                              Comment


                              • I just got my new Tilite Aero Z. A Jay J3 back was added as well as some Karma Carbon Fiber wheels I have had for about ten years.

                                AZFS1 TiLite AERO Z K0005 $
                                A2FF19 PAINT BLACKLAVA
                                A2ANO7 ANODIZE PACKAGE SUBLIME $
                                A2RSW4 SEAT WIDTH 17"
                                A2SD1 SEAT DEPTH 17"
                                A2FSH1 FRONT SEAT HEIGHT 19"
                                A2RSH1 REAR SEAT HEIGHT 16.5"
                                A2FA1 FRONT ANGLE 80?
                                SEAT TO FOOTREST 16"
                                A2FTR3 FOOTREST ANGLE ADJ
                                STANDARD FRONT END TAPER 3.5"
                                A2FE1 FOOTREST WIDTH 11"
                                A2SB1 FOLDING ADJ HT BACKREST ALUM
                                A2SB3 BACK RELEASE BAR ALUMINUM
                                SEAT BACK HEIGHT RANGE 12" - 16.5" - MED
                                SEAT BACK HEIGHT 12"
                                A2SB11 LOCKING SEAT BACK
                                A2SB19 4" DEEP BACKREST RIGIDIZER BAR
                                A2SBA1 SEAT BACK ANGLE 92?
                                A2COG1 CENTER OF GRAVITY 3"
                                A2RWS1 REAR WHEEL SPACING 1.25"
                                A2CBR12 CAMBER PLUGS ADJ REAR WHEEL
                                A2CBR9 ADDITIONAL REAR WHEEL SPACERS
                                A2CBR1 CAMBER 2?
                                A2CBR15 CAMBER TUBE ALUMINUM
                                A2FW6 5"x1" PLASTIC w/POLY $
                                A2FK1 FORKS TiLite STANDARD
                                REAR WHEEL SIZE 25"
                                A2RW14 WHEELS TiLite SHADOW $
                                A2AXL1 AXLES STAINLESS QUICK RELEASE
                                A2RTR3 TIRES PRIMO TREADED $
                                A2RIM21 HANDRIMS ALUMINUM BLACK ANO $
                                A2RIM7 HANDRIM TABS LONG
                                A2WLK5 WHEEL LOCK BLACK ALUM SCISSOR $
                                A2BUP2 BK UPH VELCRO ADJUSTABLE BLACK UPHOLSTERY
                                A2SUP1 SEAT UPH TENSION ADJ BOLTON




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