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  • Maroon92

    Sept. 27, 2011 7:31 p.m. Maroon92 SuperDork

    So, I think I am going to attempt a run at the LSR event here in Ohio next season. I am going to spend the winter stuffing a 100cc two stroke in the undercarriage of my Honda MB5, tuning it to within an inch of it's life, losing weight like crazy (on the bike and on me), and tweaking the aero.

    so, since it is already a small bike, how do I make it smaller? Low frontal area and light weight, combined with proper tuning and some work with sprockets should get me somewhere right?

    What are the best ways to go about the aero? I've seen the worlds fastest indian...

    What do I make the aero parts out of? Aluminum sheet? Fiberglass? Carbon? I know Per's 100$ a pound rule comes in to play, is it worth it? I know there are a few LSR competitors that add weight for stability, but under 100 MPH I don't figure it will factor much.

  • Zomby woof

    Sept. 27, 2011 7:40 p.m. Zomby woof SuperDork

    You might find some info here

    http://www.landracing.com/forum/

    I should be running my 125 next season

  • 93EXCivic

    Sept. 27, 2011 8:39 p.m. 93EXCivic SuperDork

    Fiberglass. Unless you have extra money to burn then carbon fiber.

  • flountown

    Sept. 27, 2011 10:05 p.m. flountown Reader

    If you look up "One Man's Dream: The John Britten Story" he uses a wireframe to mock up his aero, then lays glass/filler over it to create a plug or mold, whatever the term is, then lays the real glass/carbon...

  • minimac

    Sept. 28, 2011 12:52 a.m. minimac SuperDork

    Craig Vetter has a lot of interesting reading on streamlining on his website. The Rifle body kit should work just fine for your application.

  • 44Dwarf

    Sept. 28, 2011 7:44 a.m. 44Dwarf Dork

    All you need to know.

  • 44Dwarf

    Sept. 28, 2011 7:45 a.m. 44Dwarf Dork

    Well don't forget your MB5 is air cooled! Enclose it in a fiber bubble and strange things may happen

  • bastomatic

    Sept. 28, 2011 7:49 a.m. bastomatic Dork

    Aww too bad - I was hoping to see you and the MB5 at Thunderdrome next April! 100cc is over the limit.

  • Rusnak_322

    Sept. 28, 2011 8:20 a.m. Rusnak_322 HalfDork

    where in ohio do they do LSR? I know it could be anywhere near my house as there are nothing but straight roads with no turns.

  • Ranger50

    Sept. 28, 2011 8:55 a.m. Ranger50 Dork

    Rusnak_322 wrote:

    where in ohio do they do LSR? I know it could be anywhere near my house as there are nothing but straight roads with no turns.

    They are allowing the racing at the Wilmington Airport where DHL used to fly out from....

  • Maroon92

    Sept. 28, 2011 10:41 a.m. Maroon92 SuperDork

    bastomatic wrote:

    Aww too bad - I was hoping to see you and the MB5 at Thunderdrome next April! 100cc is over the limit.

    The 100cc engine is the same basic structure, and mount in the same exact locations. Its an hour job to swap them out! No worries, Ill hit the drome!

  • Cotton

    Sept. 28, 2011 12:54 p.m. Cotton Dork

    I'm so glad ECTA is moving to Wilmington. That's much closer for me. I plan to be at the April meet with the k1200s.

  • fastEddie

    Sept. 28, 2011 5:35 p.m. fastEddie SuperDork

    I sense a GRM meet up coming in Dub-town!

  • Sept. 28, 2011 5:51 p.m. fasted58 Dork

    flountown wrote:

    If you look up "One Man's Dream: The John Britten Story" he uses a wireframe to mock up his aero, then lays glass/filler over it to create a plug or mold, whatever the term is, then lays the real glass/carbon...

    GRM wireframe = chicken wire ?

  • 914Driver

    Sept. 29, 2011 5:43 a.m. 914Driver SuperDork

    Is there a minimum height requirement?

  • Luke

    Sept. 29, 2011 9:38 a.m. Luke SuperDork

    44Dwarf wrote:

    Well don't forget your MB5 is air cooled! Enclose it in a fiber bubble and strange things may happen

    How do you go about dealing with this?

    It's possibly just because I'm a hopeless fan of The Worlds Fastest Indian, but I reckon this is a super cool project. Following with great interest!

  • Rusnak_322

    Sept. 29, 2011 1:25 p.m. Rusnak_322 HalfDork

    also air cooled. Looks like strange things may have happened before they enclosed it in a fiber bubble.

  • Rusnak_322

    Sept. 29, 2011 1:35 p.m. Rusnak_322 HalfDork

    It isn't as grass roots as chicken wire and fiberglass, but a Honda GP bike fairing is going to be a good as you can get without a wind tunnel.

    This was designed by the guys at HRC, not the marketing people who designed the Fury.

    RS 125 body on eBay

    it is small - a lot of existing bodywork will look way too big on a MB5.

  • stafford1500

    Sept. 29, 2011 3:46 p.m. stafford1500 New Reader

    do your best to shroud the wheels to below the centers
    avoid any forward facing edges on any panels you make
    Lots of small fateners is better than a few big ones
    try to make the rider (you) fit into the body as much as possible
    A reference I read regarding motorcyle aero years ago had faired bikes from the 50s showing better termianl speed than modern sport bikes with big power.
    Make sure the aero doesn't make it unstable (weight in the front can overcome lift created).
    fairing the rider is the hardest part, had a superbike team that wanted to test with rider in our tunnel to get it right...

    Steve Stafford

 
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