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Build History (2) Note the sequence goes from bottom to top.

From September 3 2021 to November 28

Building Battery boxes

Bottom of Page

November 28 2021 Week 10 & 11

Battery connector that shorted with about 90v not 300

    November 28 Week 10 & 11

    Battery Box and Steering wheel.

     Every job takes far longer than you expect. Anyway the back battery box is now bolted and in place, with the copper connectors fastened to their relevant battery, I have started planning to wire in the Battery Management System (BMS) and attach the braiding. This is not going to be as easy, as there are 48  wires that go from each copper connector in the bottom box to the BMS in the top box. It will be necessary to wire each one to the correct point in the BMS and then! Take them all out when the car works, so that the boxes can be powder coated, and the car sprayed. Then all reassembled in the right place.
    I did run into an issue on Friday, that being that I received a very light tingle from the batteries. As I was only touching one bank I considered that there could have been a short to earth. Testing the voltage from Earth to each copper connector, it certainly appeared to be the case. However there should have been none! So a lot of connectors came off just in case. Hopefully next week I should find the reason for the short.
    Be where not to short the copper plates. I did and only had about 30 volts not 300!
    Steering wheel in position. 

    November 14 2021 Week 8 & 9

    Sill batterie box installed, the hinged side was later removed.

      Battery boxes virtually completed. Motor installed with brace, Steering column decisions, Wing Mirrors progress. Fuel filler. Letter received from DoT

       The main job over the past two weeks has been building the Battery boxes. CadCut completed the boxes some time ago and the past two weeks my friend Sid Lacy, a glider pilot like me and a talented welder, came for a number of afternoons and evenings to weld up the battery boxes. By the end of this fortnight all the boxes were completed. Those boxes to be fitted under the doors,  there is a lot more room than a standard car, were in place and a relatively small box was installed in the front. The big boxes are still awaiting a Perspex cover to be made.
      In preparation for the installation of the large battery boxes, to be placed in the rear of the car, crush tubes were welded in place. Crush tubes are inserted into the 40 x 40 mm beams where a bolt will be placed. These tubes prevent the beam being crushed when the bolt is tightened up.
      Sid and I installed a brace of the left side of the motor that will support the motor against the chassis, in compression, whereas the initial installation was under tension.
      Lights, Wipers and Indicators. It had been my intention to modernise the GT40 and operate the lights, wipers etc. with stalks. However once I got to work with assembly it became clear that this was not going to be possible, so I would have to go to the traditional style of placing the switches on the dash. The next few weeks I will hopefully start progress here, but good planning will be required.
      I purchased from a scrap Audi RS3 wing mirror. By making test connections with 12v supply in all the combinations I was able to find out the function of each wire, remember if you do this you may find as in the Audi reverse polarity reverses direction i.e. up / down, left / right. Replacement covers are available if yours is a little scratched.
      I recently received the delivery of the fuel filler cap and charging plug. I was delighted to see that the two components fitted like a glove. I wonder when they designed the GT40 in the 60's if they were aware of the size of the charger plug size.
      I also received this week the confirmation from Department of Transport the ok to go ahead, together with permission to work with my engineer on electric hand breaks. 

      Driver's seat installed

      Our Services

      • The drivers seat was installed with motor driven rails. I will not use the demonstrated switching system, I think something a little more advanced is required. The fundamental issue was minimising the height added to the seat by installing the rails. 

      October 30 2021 Week 6 & 7

      Nuts backed with silver tape

        Tesla motor half installed. Wiring harness attachments made.

         The Tesla motor was put back into the car, but I had a concern that the motor is particularly heavy on the rotor side so a stiffening beam, that will be under compression, is being made to support the weight in addition to the frame that is located above the motor where it will hang. Hopefully this will be completed next week, and photos will indicate the modification.
        It is necessary to secure the wiring harness to the glass fiber body in some places. My solution is as follows:-
        I had CadCut, who cut my battery boxes, make about 50 hexagonal pieces out of 4mm aluminum. Hexagons as they are economic to cut and they don't rotate under the glass. Each had a 3mm hole in the center that I eventually drilled and tapped to suit a 4mm thread.
        I then taped over the pieces some silver tape, that can be purchased from any good glass fiber supply. The reason for this is that the tape will prevent resin egressing into the tapped hole.
        The Hexagons were then glassed onto the body work. Using a counter sunk drill the glass was pierced allowing the 4mm screw to secure either the Deautch plug attachments or tie clips.
        Yes the whole area will be cleaned up.  

         The battery boxes for the rear of the car are virtually finished with the help of my friend Sid, who is a first class welder. I certainly learnt that drawing up components in a 2D sketch does not guarantee that they fit into a 3D car, but with a little modification the boxes were moved into position.
        The battery beams were finished and square bolts inserted into each end. They are a tight fit and with a hard tap on the end with a cold chisel they were secured. I obtained my nuts from Bolt & Nut Australia, who had my goods delivered within a few days of order.
        It was necessary to file a little inside the beams to make the nuts fit.
        The right hand photo shows the bottom battery box in place, but not secured yet.
        I expect some batteries to be installed and wired within a couple of weeks. 

        October 16 2021 Week 4 & 5

          Steel beams coated with glass, Aircon fitted, Anti theft ordered, break line modified, battery boxes collected.

          I have combined two weeks of work in one session as I felt that I had not done much work, and was too busy on the weekend to write a report, but looking back it looks as if some progress has been made. Firstly I have virtually finished completing the steel beams that hold the batteries down in the battery boxes. Critically the beams need to be covered in glass fiber to insulate them from possible electrical shorts. In addition as High Voltage wiring are required to be Orange, I will go the whole hog and paint high voltage components as well. Well not the motor. A note in applying the glass, tack the glass into place first, then when the resin has cured wrap it. I then coded with a layer of epoxy (as it is less viscose than polyester, and leaves a nice smooth surface. A final coat of orange will then take place.

          A lot of time was spent on installing the Air-Conditioning. I drilled the two holes in the underside of the  demister as per the photo in the instruction manual, only to find that some beams of the chassis interfered , so the holes were glassed up and new pipe manifold positions found, drilled and manifolds re fitted. Getting the air-conditioning unit in the right place required it to be located, marked, removed, drilled and and and and. I think it must have been put in and out of position about 6 times.

          The break lines were removed and marked for new ones to be made, as battery boxes will be fitted in the sills where they are located.
          The Anti-Theft device was purchased and arrived.

          Finally the battery boxes and battery contacts arrived from CadCut in Wangara. It has taken some time but the present economic climate everybody appears to be very busy. Hopefully next week I will see some good progress with my friend Sid able to help me with aluminum welding of the boxes and the seat rails.

          September 30 2021 Week 3

          Seat rails

            Steel beams coated with glass, Aircon fitted, Anti theft ordered, break line modified, battery boxes collected.

             Although this is a few weeks after week 2 it is because we went away in the Motor Home for a couple of weeks, resting after running Ping-Pong-A-Thon, a charity event we are involved with. We support charities that fight against slavery, watch this.
            I have continued to work on the installation of the MoTeC display, as with all fiber glass jobs it can take time, with one piece being glassed into place, then wait for it to dry firmly before proceeding to the next step. I should be finished next week.
            I came to the realisation that guaranteeing, when the car is finished I will have all the knobs and switches installed, and in the correct location is not a guarantee. For example I could get to the point when all is done that the switch to alter the climate's fan is not installed. My solution is to make a menu in the MoTeC that all functions can be located and added and modified.
            Landsdale wreckers sold me a Lexus seat $100 so I could strip out the seat rails. Hours of grinding took place to get rid of the excess metal work. You have to remember that the seats need to be as close to the floor as possible, other wise my head will rub against the roof.
            The drive shaft stumps arrived, very promptly, see video. I thought they were a bit expensive, like the Hylux headlights I bought 2 pairs! Fortunately I already have a buyer for the extras.
            Now the Exciting bit. Time from EV Works came on the 30th and ran the Tesla Motor. Much delight as I was always concerned that the EBay purchased motor may not work. 

            September 3 2021 Week 2

             

            • I ordered drive shaft stump from Zero-ev, in the UK as my Tesla motor did not come with the drive cups.
              I visited Sam Rossi, who will be my engineer overseeing the build. I was in the process of making a Glass RSJ to hold the batteries down. I would make one and hang some weights on it to test its ability to do the job. Sam put the dimensions through his computer and came up with a figure well short of the requirement, but quickly stated that a 20 x 20 steel beam 1.6mm would do the trick if wrapped in glass to insulate. Good advice to keep all receipts and packing for lights and ensuring they comply with Australian Design Regulations before purchase. Great to work with people who know their job.
              Tim, having installed the replacement power board in the Tesla after half a days work eventually managed to get the motor turning - Backwards. So he went away to test the power board on his motor in his workshop.
              I set to work drilling holes in the dashboard for the Speedo, Volt meter and clock, all in 1960's style. The grinder got to work cutting out a hole foot the MoTeC display. As I have worked with fiberglass since I was about 14 I feel quite confident getting stuck in here. If you make a mistake you can always patch it up.
              Finding various parts appears to fill half my time. Lights, switches, gas struts, and there will be far more.

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