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Thread: What is the status of your vehicle?

  1. #471
    We just began to assemble our steering wheel. The picture shows it right after it was removed from the mould. It feels very good as the gripform was done by scanning clay which was grabbed by the driver before.

    And we began to assemble the car of course:

    More pictures can be found at www.lionsracing.de/photos

    Regards,

    Tobi
    Regards,

    Tobias

    Formula Student Germany
    FSE Rules & Organisation
    http://twitter.com/TobiasMic
    http://TobiasMic.Blogspot.com

    Not many people know the difference between resolution and accuracy.

  2. #472
    hi toby, is the steering wheel a one piece part? or did you do it in two halves and glue them together? Im trying to think of a good way in making a one piece part. But im trying to see if there is a better way than just putting foam in between the two halves mold.
    RiNaZ

  3. #473
    Rinaz, You can see the seam between the two halves of the wheel. This is probably the most professional way to do it, but can become rather difficult if the bonding joggle is part of one half.

    If I understand you correctly, you want to use female molds with a solid foam core. This wont work well because you can't apply pressure to flatten the carbon and evacuate excess resin. As you may know, if you lay up on the core alone and vacuum bag the wheel, the exterior finish will need a good amount of work to look/feel good.

    If you don't mind doing the exterior work (building up the surface with resin/gelcoat and a ton of careful sanding), check out Aquapour. It is a ceramic based water soluble molding material. You pour it into your female molds, then layup on the hardened male mold. The mold material can then be dissolved and washed out through a small hole in the wheel. We just got some and are trying it out on our new intake runners. It looks pretty promising. Below is the link to Aquapour's website.

    http://www.acrtucson.com/products/Aquapour/index.htm

  4. #474
    See you all in Virginia



    The Cooper Union

  5. #475
    Originally posted by RiNaZ:
    hi toby, is the steering wheel a one piece part? or did you do it in two halves and glue them together? Im trying to think of a good way in making a one piece part. But im trying to see if there is a better way than just putting foam in between the two halves mold.
    Hi Rinaz,
    Mike is right, it is a two piece part and since this method took a lot of time until it worked I would not try to make it in a more complicated way. It is stiff like hell and has a nice finish, why try harder?

    @consig: Looks good! Is the tank in the back around the rear axle a fuel tank? Have you considered balancing problems when the tank looses weight during endurance?

    Regards,

    Tobi
    Regards,

    Tobias

    Formula Student Germany
    FSE Rules & Organisation
    http://twitter.com/TobiasMic
    http://TobiasMic.Blogspot.com

    Not many people know the difference between resolution and accuracy.

  6. #476
    I used to work for customers who dont like any seams at all. And what i did was to do the traditional lay-up and glue them together. And then i would sand the seam off and buff them with whatever compound i had at the time. You can still see the seam, but it's not that fairly obvious. So i was just thinking if there are other method where you can build a one piece part w/out having seams showing. But thanks for the tips, and that aquapour seems like a good product, i wonder how much a gallon cost.
    RiNaZ

  7. #477
    interesting fuel tank location. is that for more rear weight bias? Also does the filler neck extend past the roll hoop - tire tangent plane?
    OU


  8. #478
    Tobi, what do you plan about the e/e inside the steering wheel? Just put them in and glue the two halfes together?

    If so, then best of luck. We had our dear problems with that last year.
    Cheers,

    Josef Duschl
    www.munichmotorsport.de Alumni
    2007&2008 DAQ & Steering Wheel
    Solving the problems, you wouldn't have without computers.

  9. #479
    Originally posted by TMichaels:
    We just began to assemble our steering wheel. The picture shows it right after it was removed from the mould. It feels very good as the gripform was done by scanning clay which was grabbed by the driver before.
    I am surprised no one else mentioned this about your wheel since it was brought up once already in this topic, but you should check out this rule before finishing that steering wheel:

    http://www.formulasae.org/forums/formula/dispatch.cgi/r...ring%20Wheel%20Shape

  10. #480
    @Rinaz: I talked to the guy who built the wheel. I was wrong, the steering wheel is a one piece part and not glued together in the middle. The seam is not really a seam. It looks like a seam, because the mould is divided in two parts and a bit of the resin ran in it. His original comment was: "Everybody can do it in two parts, but the stiffness is increased very much by building it as a one piece part."

    @screwdriver: Since it is not a two piece part the electronics can not be put inside before glueing it together. We will cut a hole in the front and screw the pcb to a transparent plexiglas plate which will then be mounted on the wheel to close the hole. Since we got a lion with red led eyes on the pcb it should look really nice. Of which kind were your problems?

    @CoreyH: Thanks for the hint. We have already thought about the mentioned rule and we will ask the committee to approve our steering wheel before scrutineering. But there is not really a concave section. The picture perspective may baffle you a bit. If they do not approve it, we will build a new mould and a new steering wheel

    Regards,

    Tobi
    Regards,

    Tobias

    Formula Student Germany
    FSE Rules & Organisation
    http://twitter.com/TobiasMic
    http://TobiasMic.Blogspot.com

    Not many people know the difference between resolution and accuracy.

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