What parts should be created or improved? Need ideas for design project!

Discussion in 'The Garage' started by skathe, Apr 12, 2013.

  1. skathe

    skathe Adventurer

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    Hey guys,

    So I am a DR650 and SV650 owner as well as a soon-to-be graduating mechanical engineer. Anyways, I am starting to brainstorm for my senior design project, and of course I wanna do something bike related! Decided to post in the garage cause I figure you guys are the most mechanically inclined.

    So what is a part that you guys would like to see made for bikes? Could be a part or an accessory (such as stands, etc). All realistic ideas are welcome! Also, feel free to say bike-specific ideas of any kind or improvements on current parts.

    Thankya!

    P.S. If I choose an idea from this thread, I will give updates and could share CAD files after completion!
    #1
  2. OsoADV

    OsoADV Oso

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    Hmmm. Will brainstorm on this a bit. Interested to hear suggestions and see what you come up with.

    I know DR guys really miss the BBQ rack. May be a little too simple for you, but a nice wide, cheap rack is nice for any bike.

    [​IMG]

    http://www.advrider.com/forums/showthread.php?t=549820
    #2
  3. skathe

    skathe Adventurer

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    Simple ideas are fine because they can be made more complicated by making them adaptable to many bikes or by adding to them. Also, simple parts that may affect performance are also fine because I could actually make the part and do performance testing.
    #3
  4. FlySniper

    FlySniper Bleh...

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    Making the DR650's rear suspension behave more like that of an RMX would be nice....

    There's a guy on here who adapted the RMX/RMZ swinger to a DR, but it took frame mods to do it. Maybe you could apply some engineering foo and come up with a bolt-on system that was close to the RMX's in function...


    If you do, send me the NC files and I'll machine a set (to see how well it works!<label for="rb_iconid_28">[​IMG]</label>
    #4
  5. skathe

    skathe Adventurer

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    Interesting, do you have any idea who did this or how I could find it? I looked without much luck.
    #5
  6. dennism

    dennism dennism

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    Here's one you could have fun with.

    Many bikes don't come with a center stand, you have to buy one - if they are available.

    The part that touches the ground could be generic, then design a "connector" to fit to the specific bike. Many times one stand could be made to fit a series of bikes that basically use the same frame.

    Then.....extra-cost option.....add a power lifter.

    Now, the lifter should only need to raise the bike onto its centerstand, with the rider(s) OFF!:dhorse
    #6
  7. Daamud

    Daamud Life is like a box of Old Milwaukee

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    An adjustable kickstand.

    Guys with dirt and supermoto wheels need two kickstands....

    Also, a loaded bike may need a shorter stand.



    A telescopic shaft with a pin would be easy. But maybe a fellow could make something a bit fancier.
    #7
  8. skathe

    skathe Adventurer

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    It would definitely possible to just have a kick stand that you can push down to whatever length you needed. I'll think more on that as well as a center stand.
    #8
  9. FlySniper

    FlySniper Bleh...

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    I found the original thread, the OP goes by Snowy... but it looks like he's deleted all of his posts, pictures and details of the build.

    FWIW:

    http://www.advrider.com/forums/showthread.php?t=555689
    #9
  10. Beezer

    Beezer Long timer

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    I try to carry stuff that has more than one purpose, so I always thought it would be cool to develop a bash plate that doubles as a center stand. the choice of bike will dictate the geometry & I expect the idea would not work on some if the throw is too long, the biggest question is how lever the bike up on the stand. it's on my list of things to do some time... help yerself if you like.
    #10
  11. redprimo

    redprimo Been here awhile

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    A lot of modern dual sports have somewhat road oriented gearing with a first gear that won't allow super slow creeping. One of the realy neat features of the old honda ct90's is their sub trany's that at the flick of a lever gives you super low gearing. How about a sub trany conversion, it would have to be specific to one bike.
    #11
  12. RVDan

    RVDan Long timer

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    An adjustable height windshield with universal mounts to fit any bike and removes without tools.
    #12
  13. GreaseMonkey

    GreaseMonkey Preshrunk & Cottony

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    An adjustable kickstand that was spring loaded would be a nice project, something that you can operate with your foot so when you step on a tab the stand goes down, then extends and locks when you remove your foot from the tab. Then you can lift the tab with your toe and have the stand unlock, retract, and then go back up.

    Or some dual purpose stuff, design people love that stuff. Something like a luggage rack that can be easily removed and turns into a camp chair or something.
    #13
  14. Plaka

    Plaka Brevis illi vita est

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    You want something to show prospective employers. Nothing cheezy.

    How about a bolt on aftermarket variable ratio chain drive. Replaces stock chain and sprockets to give field adjustable ratios. One option might be a simple 2 ratio setup with dual chains/sprockets and a clutch to switch between them. A more sophisticated approach would be a continously variable (or perhaps semi-continuous) drive with an expanding sprocket and a slack chain take up. The sprocket might be a plate with a series of toothed snail sections that rotate in concert to make a larger or smaller sprocket. Essentially cams around the circumference of a disk with teeth on the edges of the cams. You would have to go to a wider chain or even a belt to work with fewer teeth in engagement. or perhaps it's a planetary gear set that replaces the rear sprocket. Teeth around the outside of the planetary to take the power from the chain and then various planetary gears inside of that moving the power to the center and the hub. Or build the gearset into the hub like the old Sturmy-Archer bicycle rear hubs (2 and 5 speeds I believe). So you replace the rear wheel and add shift linkage to get the extra gears. A two speed might be fine---one speed is strait through so stock gearing, the other is a low range that drops the overall rear end ratio for tougher off road work.

    You don't have to re-invent the wheel here, just apply technology considering all the constraints so you get something that works.
    #14
  15. Plaka

    Plaka Brevis illi vita est

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    Another possibility is a recovery system for getting bikes out of bad places, like down steep embankments, mired in muddy crossings, etc.

    Need a LOT of force and an anti-slip back feature, like a ratcheted winch rather than a simple rope and sheaves.

    Needs to be extremely light and compact. So some strength of materials issues.

    Should include an anchoring system for instances where a good anchor is not available.

    Should be integrated on the bike. So some parts are multi functional...a handle that is part of a rack for instance. or use part of a crash bar as the winch frame. Things that reduce how much you have to carry to have the thing.

    Possibly uses the bike for power. Like a capstan on a rear wheel.

    Should be able to be used in a wide range of circumstances by a solo rider.

    Should be able to recover other bikes.

    Should be durable and have a long life.

    Should be extensible for as many applications as possible. Moving a fallen tree out of the way for example. Or use in the shop.

    Should not cost an arm and a leg. No Titanium.
    #15
  16. skathe

    skathe Adventurer

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    This and the previous idea are both awesome, thanks for the detailed explanations...I will think more on it and talk to a professor or two...I would probably do a variable sprocket rather than a dual sprocket...I will think on it more, Thank you!

    One idea that I did have was something with making the 3 way catalytic converters lighter/smaller by changing the geometry to provide more surface area. Or rigging up a uv light source that would hit a titanium dioxide coating inside the exhaust pipe which produces oxidizing agents to remove volatile organic compounds. Both of those ideas require quiet a bit of chemistry though, and apparently the professor in charge doesn't care much for emissions regulations.
    #16
  17. Plaka

    Plaka Brevis illi vita est

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    Neither do riders. Those things get torn off and thrown away. now make one that improves performance or does something else nice....

    I'm a mechanical designer. These are some of the things I've though about but haven't generated solutions for. Stuff like racks that turn into chairs (I REALLY like a chair in camp and my new boxes won't do) are sorta trivial.


    There was some stuff in a thread about using engine heat to cook with. Mostly fluid exchange systems. Solutions have been done, and commercially to boot. I just do hot dogs in foil on the jugs (Airhead) But how about engine heat to warm the rider? As it stands the solutions are electrical. This is a challenge for older bikes with little extra electrical capacity. It also uses more fuel to make the juice while throwing away engine heat. I want my exhaust to heat my grips already. Or a hydronic vest. Difficult problems and possibly not the best for an ME to show off with, which is what you want.

    As a rule, avoid ill defined problems. It's the constraints you have up front, and the way you solve for them, that makes the work shine. Also be careful of who owns the solution. Often the school does which can be an issue if it's really good and you want to market it. MEs are low on the engineering pay scale. Being an entrepreneur is the way to make the cash. If it looks like you're really nailing it, un-nail something and keep it for yourself, ideally something non-obvious.
    #17
  18. clintnz

    clintnz Trans-Global Chook Chaser

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    Seeing the centre stand & adjustable kickstand suggestions gave me an idea, how about a triple purpose stand - LH kickstand plus RH kickstand - then have them both engage together to work as a centrestand? The upper bracket could be made in versions to bolt onto different bikes.

    Centre stands are really useful for maintenance etc, but suck in many offroad situations, having a centrestand & a kickstand seems excessive on a lighter bike, integrating the lot would be cool. The fact that aftermarket stands of both types are made for bikes without them suggests that a market exists. Plus there is the added bonus of a RH kickstand - these come std on some farmbikes & until you've used a bike with one you don't realise how nice it is to have.

    Good luck with the project no matter what concept you run with!
    Clint
    #18
  19. Plaka

    Plaka Brevis illi vita est

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    That one's real interesting! Now you have me thinking how to do it.

    Maybe one single leg stand in the center that can be kicked out right or left. Fold out or add on the T bar to make a centerstand.
    #19
  20. clintnz

    clintnz Trans-Global Chook Chaser

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    My initial idea would be to have a kickstand each side with a pin locking them together for centrestand use. Either the angle or the length of of the stands would have to be adjustable so they would work in both positions.

    That's a different mechanism than I had visualised but it would be worth thinking through also. The fold out line of thinking could have potential.

    Cheers
    Clint
    #20