Rallye navigation bracket photo thread

Discussion in 'Racing' started by wrk2surf, May 4, 2011.

  1. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

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    I did a the 24 hours rally last year and I think most of the guys with ATV's used some kind of plastic to protect the differential and the suspension from getting all over the place .. May be it was HDPE plates ... :hmmmmm
  2. tileman

    tileman Long timer

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    I made my first mock up with delrin which is similar to the stuff crash knobs are made of so pretty strong and has good strength/vibration characteristics. When it catches fire its pretty entertaining apparently :evil.

    The water jet cutters I have used can cut it so once I have made final decisions re my tower I may have a crack at making it from delrin and see how it goes.

    That would me mark 7 I think :rofl!!!!!
  3. HogWild

    HogWild Scott Whitney

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    Doesn't Delrin crack when bent too far? I made some parts with it and found it slightly brittle. HDPE is impossible to crack.
  4. tileman

    tileman Long timer

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    I haven't had this happen but there is always a yet. To be honest its more about sourcing it. I know where it gets dumped in a skip in usable sizes and hence free. . :deal which is good for mockups.

    The chopping boards I got were a bit flexable and in my application they wouldn't be big enough, hence I'll have to find a source.

    The delrin I got was pretty flexable considering its thickness. It may crack in a crash but I think (who knows here) that I'd be more worried about myself in that situation. To this end I plan to make the fairings I'm build attach to the tank in a similar way to neduro, strapping etc so they can move about a bit and hopefully be more able to be put back into position.

    If in the case that the bike drops on its side (low speed) for example I would think the tower is less likely to be hit and the fairing is more likely to cop punishment and that impact would be transfered through to the tower. If the tower has some flex and the fairings are not able to move from the mounting the problem just becomes different. If I or someone else was to make a tower that can flex then (as per the previous clip with the hdpe) the fairing needs to aswell. I can't see why it possible to do one without the other, eg, solid (alloy, bolted fairing) or flexible (hdpe/? and a fairing that can move a bit. Its my current thought anyway. Although history states thats may change :lol3
  5. vander

    vander full-time dreamer

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    :deal same same :deal

    [​IMG]
  6. ArthDuro

    ArthDuro quarantined

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    Yes same watch different strap as I said. Devil is in the details. He must have upgraded to an aftermarket component for rally purposes. :deal :D
  7. doyle

    doyle RallyRaidReview-ing

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    Seems the HDPE makes the structure of the tower unnecessarily thick where space savings is critical. Certainly I can see the benefits of a flexible mount as he demonstrates, but why not a flexible mount with a more traditional aluminum tower? Seems as though the consensus is that the weight is similar, so why bother with the extra thickness of a full plastic structure? A flexible mount with some damping built in to minimize vibration should be sufficient.

    :scratch
  8. wrk2surf

    wrk2surf on the gas or brakes

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    perhaps because he is on a shoestring budget living in a second or third world country..
  9. doyle

    doyle RallyRaidReview-ing

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    Point taken, but I am not really wondering why he built his bracket that way, just wondering why the discussion seems to have turned to plastic versus aluminum for the entire structure? :dunno
  10. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

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    Maybe easier to manufacture a Navtower this way if you are an everyday person without acccess to a machinist (I agree with the other point about the 2nd world country... ) . You buy everything of the self and all you need is a drill and a good heat gun. In any case I think it is better to make it flexible where it needs to be. I think if you have a crash like the Kawa above, the Roadbook holder itself for example will sustain a major damage, may be completely destroy itself. If you put some though in to the Navtower I am sure you can carry some major spare parts (i.e. you make it break where you would like to break, like the brake levers for example) and curry a couple of Al plates with you :freaky
  11. wrk2surf

    wrk2surf on the gas or brakes

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    I think because metal bends and breaks whereas plastic bends and then returns to its shape... and the vibration factor..also I see that you can fab up and carry two or three spares for not much money or effort.
  12. Carlos M

    Carlos M www.motoxplorers.com

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    The guy is definitely on a shoestring budget but it is the first time I've heard of Spain as being in the "second or third world" :huh
  13. tehdutchie

    tehdutchie Long timer

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    :stupid
  14. trailtrick

    trailtrick goat trail rider

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    Spain is no a second o third world country :deal,
    also remember third world country quickly comming first world
  15. trailtrick

    trailtrick goat trail rider

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    Same here:huh .
    I
  16. wrk2surf

    wrk2surf on the gas or brakes

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    I thought he was from a small South American/Central Amercian country .. sorry .. went about that reply the wrong way ... i tried to get my point across the wrong way.. my bad.. should have went something like this...

    due to a limited amount of manufaturing or CNC machining facility's at his disposal where he lives... he decided to shape a navagation tower out of something easily shaped..


    I am far from putting down anyone... or any country.. dont take this as an attack on anyone.... or any place...
  17. Carlos M

    Carlos M www.motoxplorers.com

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    We figured that. Don't worry It was just the F5 habit of getting all facts straight :D

    Plenty of CNC in Spain. According to some of the interviews, Paco Martinez was on a very small budget, is an inventive person who likes to do things on his own and probably he is not very worried with the finishing of his solution. He finished Dakar on that ugly looking thing, that's for sure.
  18. GZPainter

    GZPainter A Scouser from Crete

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    And a little bit spamming... (not so much but relative to the issue...)
    Hey Armageddon....what program are you using to create this one??
    It doesn't look like ProEngineer...it may look difficult and time consuming but it is amazing!!
  19. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

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    Small world, GZPainter, I am also from Crete and I have lived in the UK for more than 10 years :evil

    Anyways, It is a mixture of programs, mostly Autodesk's series (Inventor, Fusion, Alias) and Solidworks for some parts... FEA using ANSYS to make sure everything will stay in place or it that iw will brake where I want it to... :freaky
  20. HogWild

    HogWild Scott Whitney

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    The old school way is mounting your nav gear on the crossbar. And put your tool box on top of the gas tank!

    [​IMG]