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2012 Scratchbuilt Chassis Proxy

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  • 2012 Scratchbuilt Chassis Proxy

    This race is for Group 5 cars from 1976 to 1982.

    All races to be on routed tracks.1st race to be held in April 2012. 8 races (1 per month) across Australia with the final race held in November 2012.

    Chassis must be homemade, no modifying a production chassis.

    Bodies must be either injection-molded 'hard' plastic or resin or fiberglass. Please check with the organisers if you wish to use a body made from other materials; however vacuum-formed bodies are not permitted. Appendages such as on the real car (e.g. spoilers and diaplanes) may be painted Lexan or other lightweight material.

    Fantasy liveries are allowed.

    Body must be mounted securely but can float.

    All cars must carry 3 numbers on the car, one on each side and one on the front.

    All bodies must contain interior tray of plastic or styrene a minimum 10 thou thick comprising a three dimensional driver with head, shoulders, arms and a steering wheel. Vac formed windshields and interiors are permitted.

    The body must fully enclose the chassis, running gear, guide and braid when viewed from above. Maximum body width is 2 5/8" (67mm).

    Maximum width measured from the outside edges of the wheels must not exceed 2.5", regardless of the dimensions of the real car.

    Minimum ground clearance is 1/16".

    Chassis may be of any design, inline, sidewinder, anglewinder or front mounted inline, and made from any material but no laser or EDM-cut components, other than guide tongue and axle pillow-blocks, may be used. Pre made rear axle brackets are permitted. Chassis may be made out of brass, copper, fiberglass, molded plastic, Carbon Fiber, wood, resin, laminated composition, piano wire may be used in the chassis.

    The chassis MUST BE SOMETHING THAT CAN BE BUILT IN THE HOME WORKSHOP.

    No modified commercial chassis permitted, this is a scratch built proxy race.

    Only one guide flag may be used.

    Ball bearings are NOT permitted.

    Any commercially available 1/32 scale motor can be used however cobalt magnets are not permitted. The motor must be the same type for each track. No changing to a hotter motor for the faster tracks. The motor may be replaced at any time with another of same spec

    Wheels must contain hub inserts appropriate for the car being modeled and the period unless the wheel has a design to make it look like a real wheel.

    Tires - Minimum front tire diameter will be 18mm (.700) Minimum width of 7mm. Minimum rear tire diameter will be 19mm. Maximum tread width of 14mm. All tyres must be black, either Urethane or Rubber. No silicone tyres, no spongies.

    Eligible cars include but not restricted to:

    Porsche 935 (includes the 935-77, 935-78 known as the Moby-Dick and the customer Kremer K3 and K4 and the JLP variation)
    BMW 320i Turbo
    Toyota Celica LB Turbo (RA22) (1st generation)
    Dome Celica Turbo (RA45) (2nd generation)
    TOM'S Corolla G5 (A40)
    Nissan Skyline RS Silhouette Formula
    Nissan Nichira Impul Silvia (two nose variations)
    Mazda RX-7 252i
    Mazda RX-7 253/253i/253SR
    Mazda RX-7 254/254i
    Nissan Bluebird SSS Turbo
    BMW 3.0 CSL
    BMW M1
    Lancia Stratos Turbo
    Lancia Beta Montecarlo Turbo
    Ferrari 512BB LM
    Zakspeed Ford Capri Turbo
    Ford Escort Zakspeed
    Zakspeed Lotus Europa Gr.5
    Greenwood Widebody Corvette

    If these rules look familiar they are, I borrowed them off Phil K from the scratchbuilt proxies he used to organise a few years ago, with a few changes to update the race into 2012.

    Cheers

    Paul


    Sports Racer ----- paid
    chenglaw -------- paid
    manimmal
    neil
    brk12345
    BMR
    Mohawkk
    slo1quick
    rsclio
    mmmoose -------- paid
    MRollingthunder -- paid
    HarVWallbanger
    redlynr
    MobyDick
    Ecurie Martini
    Biedmatt ---------- paid
    alexis in greece
    gascarnut
    rixvette
    1/32 slotter
    MNewns ---------- paid
    o3raledale -------- paid
    hgpanel ---------- paid
    R Blythe --------- paid
    A Barford -------- paid

    R Blyth has paid but I don't know your SCI name.
    Last edited by Sports Racer; 04-02-2012, 07:54 PM.

  • #2
    Hmmm I'm tempted to ask for a definition of 'scratchbuilt'. Does an HRS/2 count? And what about the BMW 3.5 CSL? I have 1 that could become 111 with the application of a couple of decals.

    Comment


    • #3
      Thanks Paul for enticing me into another proxy. Any photos of the tracks involved?

      Ken

      Comment


      • #4
        Does an HRS/2 count
        The chassis MUST BE SOMETHING THAT CAN BE BUILT IN THE HOME WORKSHOP.
        I think you would need some moulds and an injection moulding machine in your workshop!

        Comment


        • #5
          Here's what I've got so far.

          Beachside Model Raceway - Southern area of Adelaide
          26.75 metres around the shortest lane 27.05 around the longest lane (4 lanes)
          2 x 40 amp power supplies - Adjustable power level can be set from 2 volts to 17 volts
          Races usually run at 12 volts -
          4 lanes MDF timber routed track - Copper braid
          100mm lane spacing minimum
          150mm spacing on the sweeper at the end of the main straight
          Plenty of run off area to keep deslotted cars out of harms way until the marshal does his job.
          Dead strip timing to SRM 2.30 program
          Enoch grey Ferrodore
          Its a fast open layout that suits the faster cars
          From the start line
          The main straight is 7.5 inside lane - 8.2 metres outside lane then a long 4.6m (outside lane) right hand turn through a wide sweeper (the lane spacing splays out into 150mm so over taking can be done easily while all the cars are sliding) , then as it exits onto the back straight the track sweeps back left into a 1.8m "s" reversing the slide from the right hand sweeper into the left hand uphill climb ,into a 4.5 metres straight then it has to brake hard into a 180 corner , next a short 1.2m straight into a right / left slide under brakes around another 180 corner then 2m straight leading to the bridge underpass . Then through a 30 degree kink under the bridge.out the another side turning left into a 2 metre ( inside lane ) 3.5m (outside lane )sweeping corner that tightens up at the end to go left over the bridge then a right turn with a slight off camber feel to it as it enters the main straight and over the finish line.
          The motor spends a lot of time in its higher rpm limit using the usual 3:1 ratio 9:27 gearing (inline) or 3.8:1 10:38 sidewinder type gearing . The track has a few sweeping corners that require the car to stay in a constant slide and remain stable .
          The braid sits 1/2mm below the track surface.
          Forgot .. track slot ( 8mm deep 1/8th wide )

          As for controllers , everyone that races at my place has gone fully adjustable brakes , ohms and voltage

          tyres ... I always run MJK but some have run slot it F15s - F22s and had better lap times - the local club still debates whether those " F " tyres were treated before the racing started

          Lap times ... lotsa lap times have been posted about my track on auslot that cover a lot of different car types both 1/32 and 1/24th a good place to start is my round of the 2008 proxy cars , there is a good run down of what worked on my track and what didnt regarding the proxy entries that year and a video that should still play





          lap length - 15m
          slot depth - 7.5mm
          OK for wood guide? Yes, No problems with ninco pro guide. But I do have a problem with the thickness of carrera. I will work on that over xmas
          braid or tape - braid
          in the case of braid what the recess is (flush with the surface or below) - flush
          surface paint - Raw ferrodor
          what power supplies and controllers are being used - Slot.it controller
          best tyre brand(s) that suit the track - Best would be Slot.it F series or NSR (but i doubt these would last the whole series) Slot.it P6 & MJK run good as well and would be my pick.
          lap time for quick cars - from 5.5s





          Canberra Way2fast

          8 lane commercial track
          Track surface - Ferrodor
          Power supply - 40 amps
          Controllers - Professor motor
          Best tyres - Slot.it F22 but these go off after 5 minutes racing. Recommended Slot.it F30, MJK or NSR Ultra. Ninco also work.





          Melbourne Model Raceway
          length approx 18m
          wood guide ok
          braid - flush
          ferrador surface
          power source, not sure but easily adequate
          controllers 45ohm turbo supplied, but drivers own throttles will be used
          outright lap record @14v 2.9, nsr mosler. More likely the quick proxy cars will be doing 3.5 @12v
          Silicons are banned, and although rubber tyres such as brm or slot.it raptors provide the most grip, it tends to be a majority rules kind of track, ie if it's mostly urethane, the brm's etc just don't work.






          Newso's track

          Track is flat enamel painted surface, braided, each lap is 16.5 metres and timing system is Trackmate.







          Last edited by Sports Racer; 01-31-2012, 07:18 PM.

          Comment


          • #6
            Furthering Paul's question... Can a slot.it pod be used in said scratchbuilt chassis? Can SCC axle blocks be used?

            Comment


            • #7
              "Chassis may be of any design, inline, sidewinder, anglewinder or front mounted inline, and made from any material but no laser or EDM-cut components, other than guide tongue and axle pillow-blocks, may be used. Pre made rear axle brackets are permitted. Chassis may be made out of brass, copper, fiberglass, molded plastic, Carbon Fiber, wood, resin, laminated composition, piano wire may be used in the chassis.

              "The chassis MUST BE SOMETHING THAT CAN BE BUILT IN THE HOME WORKSHOP.

              "No modified commercial chassis permitted, this is a scratch built proxy race."


              I'm thinking these rules mean no complete HRS2's allowed, but you can use SCC set-screw front axle blocks, and any commercially sold form of rear axle-to-motor bracket. Since the Slot.It pod is more than a rear-axle-to-motor bracket, I'm guessing it is not allowed.

              Comment


              • #8
                Yes Robert that was the intention when I drafted the rules some time ago. We wanted to try and get some old fashion scratch building going on!

                Comment


                • #9
                  So no screw in race type pods from any manufacturer? Just to be clear...

                  Comment


                  • #10
                    Correct.

                    The only parts you can use that can be commercially made are the guide tongue, axle pillow-blocks and rear axle brackets (not motor brackets such as HRS). You can't even use a modified Womp or 1960's Monogram chassis.

                    This is how we used to make chassis 40 years ago.

                    Hope this helps clear things up.

                    Cheers

                    Paul

                    Comment


                    • #11
                      Sportsracer show them a photo of the kind of chassis that you are looking for. I love my Jig now. . .

                      Ken

                      Comment


                      • #12
                        What about an integrated guide tongue/pillow block mount like this?

                        Comment


                        • #13




                          .


                          Here are afew examples of cars we have built for the old WPR Proxy event over the years also check out Chris Briggs's site for a good build article.
                          Last edited by Phil Kalbfell; 11-27-2011, 05:20 PM.

                          Comment


                          • #14
                            Originally posted by redlynr View Post
                            What about an integrated guide tongue/pillow block mount like this?

                            not allowed

                            Comment


                            • #15
                              I was just looking around at some bodies and is there any max width rule as long as the body covers the tires? I found a BMW body that is 70 mm wide.

                              Looking forward to giving this a shot. Ken

                              Comment

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