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Nissan R89C - New Chassis Design

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  • Nissan R89C - New Chassis Design

    Moved from another thread....







    Hi All

    Here are some computer renderings of the R89C chassis featuring the front end components. The new design allows for optional front end suspension to be added. The stock configuration will come with the solid 3/32" axle and the suspension arms locked to the chassis. These arms are secured from the underside using flat head machine screws. The lockdown nuts themselves will be made from Glass filled nylon - as are the suspension arms.

    To add suspension, the lockdown nuts are replaced with machined aluminium "T" nuts and springs as shown in the lower picture. The stub axles will be secured with "e" clips. They can also be adjusted, with the use of the set screws, to have positive or negative camber up to 3 degrees. The suspension arms themselves can rotate about the center of the chassis up to 4 degrees - allowing the tire an upward motion of just over 2.5mm

    Colors shown are for illustrative purposes only.

    I'll post all the new features of the entire car shortly

    Regards
    Ernie

  • #2
    Cool! I've been wondering when somebody would finally do sprung half shafts in the front, and these look really nice. How have they worked out in testing?

    Comment


    • #3
      I like the ability to set the camber!! Any thought to have toe adjustment too?

      Chassis design looks really good, nice how symetrical it is all the way through the back.

      Cheers!
      Paul

      Comment


      • #4
        Originally posted by TransIssues View Post
        I like the ability to set the camber!! Any thought to have toe adjustment too?

        Chassis design looks really good, nice how symetrical it is all the way through the back.

        Cheers!
        Paul
        Paul, I was thinking the same thing. At first I thought there would be nothing to gain from setting the toe on a slot car, but the more I think about it, there may be an advantage in setting toe equal to the slip angle. Might get rid of any last hint of tire scrub at the front end. Have any thoughts on this?

        Comment


        • #5
          Kurt,
          My thoughts and some minor experiments went the other way. I set the front tires to have toe in so that the front tires contributed to turning in.

          Here is one of the few photos of my experiment:


          This was on a truck chassis, and this is just where I was gluing the axle blocks in place. The toe adjustments made a mess... Truck seemed to be doing well, but its motor was a bit off by the end of testing and another truck made the trip instead.

          Cheers!
          Paul

          Comment


          • #6
            ....and I thought Avant Slot was on to something. This is the next level.

            Comment


            • #7
              Again, great design!!

              I was looking at this shot:


              Would be pretty easy to put a "T" ball joint connecting the two suspension arms in the center......

              Cheers!
              Paul

              Comment


              • #8
                Right, Paul, definitely toe in rather than toe out. And the only reason we'd bother is because as long as the front tires touch, there must be friction (even with zero-grips).

                Regardless of where this thing goes, I'm pretty excited to see the half-shafts with camber adjustment. I was going to get one of these cars anyway, but this makes it a 'must have'.

                Comment


                • #9
                  Very nice! I hope this design carries through to all future MrSlotcar releases.

                  Comment


                  • #10
                    That's pretty darned cool.

                    I hope it's under this version of the Nissan...

                    Comment


                    • #11
                      Agreed, I have had one of these on pre order for a long time and it looks as if my patients is paying off.

                      When can we expect to be able get our hands on this car?

                      Comment


                      • #12
                        Good work Ernie.

                        While I'm not a fan of all four tires on the track for the best performance, your design may just work out nicely....seperate wheel speeds, seperatly sprung and looks like the weight penalty is minimal if at all.

                        Nice.

                        Mike

                        Comment


                        • #13
                          Originally posted by ElSecundo View Post
                          Cool! I've been wondering when somebody would finally do sprung half shafts in the front, and these look really nice. How have they worked out in testing?
                          Hi El Secundo

                          The Front Suspension concept was tested out with the following results and observations - No magnets involved.

                          1. On plastic Ninco track, the best setup was with the front tires at 0.15 to 0.20mm off the track surface and lightest spring tension on the arms. Average lap times were faster than the same car with a straight fixed axle in stock position by .15 seconds on a average lap time of 6.5 seconds. The most pronounced characteristic was that the car drifted in the turns evenly in one smooth action- as opposed to when a car "wags" repeatly going through the turn

                          2. On a wood track we found the same characteristic, but it took slightly increased spring tension to get the improved result. Since we had one spring to work with, we could only increase tension using washers under the spring - A larger diameter spring wire would have the same effect. The wood track also allowed having the front wheels set closer to the surface at about 0.1mm above.

                          Plans are to continue using this front end arrangement in all future MR Slotcar models.

                          Best regards
                          Ernie
                          MR Slotcar

                          Comment


                          • #14
                            Originally posted by mrslotcar.ca View Post
                            The most pronounced characteristic was that the car drifted in the turns evenly in one smooth action- as opposed to when a car "wags" repeatly going through the turn
                            Thanks Ernie, this part really stands out as a major improvement.

                            It's exciting to see carefully thought-out advancements. Thank you, I really appreciate that effort.

                            Do you think that adding front suspension will have a substantial effect on the retail price?

                            Comment


                            • #15
                              Nissan R89C - More car info

                              Hi All

                              I wanted to make mention here of the improvements made to the Nissan R89C over our previous model the Mazda 787B. There was a substantial learning curve from the design process of the Mazda, and continues on through with the Nissan and will surely continue on after that.

                              Anyone that knows me from my Eurosport Racing past and the chassis' that I'd produced over that time, can tell you I could hardly wait to release the next version of the car - always striving to make it better. I can assure you the same intent applies here.

                              There were several concerns about the Mazda that surfaced shortly after it's release. Although I was very happy with the performance of the car in general, there were issues surrounding the design and construction of the body that needed improvement.

                              Here is how I have addressed those concerns in the design of the Nissan and how it compares to the Mazda

                              1. Redesigned mounting features of the windsheild, side windows and headlight covers so that they are much more securely attached.

                              2. The body front splitter is now part of the body itself.

                              3. The rear wing with support struts and mounting method, is now molded as a single piece. Still detachable from the body

                              4. The antennas will be molded from a more flexible material

                              5. Mirrors will be molded from a material that will maintain the paint finish - And keep it from flaking off

                              6. Removal of body screws will be made easier

                              7. General overall increased attention to the fit and strength integrity of the body.


                              There are also these new improvements which will be incorporated into the Nissan

                              Body weight will be 15.5 grams - Mazda was 22 grams

                              Driver figure with cockpit will be 1.8 grams - Mazda was 4 grams

                              Body will be 62.5 mm wide - The Nissan is a much wider car in actuality compared to the Mazda

                              Softer/Higher Grip Tires

                              Improved motor with increased torque and brakes

                              Improved quality and fit of the wheels


                              The first release of the Nissan R89C will be the "Tenoras" version, as well as a White Kit Car. Plans are to also have the cars released in the "Contenders" Series, 6 different colors, as we have announced with the Mazda.

                              I'll be posting shortly with news on these soon to be released Mazdas, along with the #202 JSPC Renown Mazda.

                              And....stay tuned for news about MR Slotcar sponsored Race Series at your local store or racing club.

                              Regards
                              Ernie

                              Comment

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