Rooney Special Airhead GS Race Frame

Discussion in 'Airheads' started by Pezz_gs, May 6, 2010.

  1. Pezz_gs

    Pezz_gs Cant ride for crap

    Joined:
    Nov 13, 2004
    Oddometer:
    4,071
    Location:
    Sydney Skunkworks
    This is an Airhead frame with difference :thumb

    There is this chap here in Oz called Paul Rooney

    He is a bit of a legend in Airhead BMW circles over here and has extensive racing and race suspension tuning experience. He is also well versed in two stroke tuning and built up some factory Huskies in his time.

    Some of you may have remembered his Austrlaian Safari R65GS (850cc). This bike has also competed in the Condo 750 this year, only to get a tree root through the intake tube between the carbie and the airfilter, eventually seizing the engine. It is being geared up for the 2010 Safari as well.

    [​IMG]

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    Anyways enough of the history.

    Paul has developed a new frame for the Airhead and it is a work of art. The frame is box section and in also the airbox

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    I have a lot more details but am heading out the door camping for the weekend, more to come Sunday Night
    #1
  2. Carl

    Carl ,,,

    Joined:
    Oct 5, 2001
    Oddometer:
    804
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    South Tejas
    Total dry weight of this bike?

    How is the engine mounted/secured?

    Thanks,
    Carl
    #2
  3. OldDog

    OldDog aka Hugh Jarse

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    He's a bloody thinker ain't he Pezz! Very impressive piece of gear, i'd be curious to know what that thing weighs etc too.
    #3
  4. carmima

    carmima All Orange :-)

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    Even enough for me to to think it looks the goods :huh
    #4
  5. Padmei

    Padmei enamoured

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    Mar 12, 2008
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    very cool
    What size wheels are on that monster?
    #5
  6. OldDog

    OldDog aka Hugh Jarse

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    I'm betting 21 inch front and 18 back to allow the fitting of a broad range of tyres.
    #6
  7. Stagehand

    Stagehand Imperfectionist

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    wow, that thing looks amazing. Resembles a modern dirtbike frame. Bet its rigid as hell.
    #7
  8. Lornce

    Lornce Lost In Place

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    Hmmn... I was thinking it looked more like summat from a WWII Zundapp, but I'll reserve judgement until I know more. :D

    I'm in.

    :thumb
    #8
  9. Okavango

    Okavango Adventurer

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    Aug 8, 2006
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    wow, more information about the frame please.
    #9
  10. matteo

    matteo HPM

    Joined:
    Apr 30, 2005
    Oddometer:
    514
    Location:
    San Jose, CA
    Nooooooooooooooooo!
    :cry What have we done to you to make you do this?
    Need more information.:lurk
    #10
  11. BOOTLACE

    BOOTLACE Bikie Scum.

    Joined:
    Dec 24, 2005
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    6,567
    Location:
    Methane Central..(Sth Gippsland)
    The bike is currently on it's way from OZ, to the east coast of Russia, from where it will be ridden thru Mongolia and the 'Stans, and all that stuff.(It and the rider have been there before, but with original chassis)

    [​IMG]
    #11
  12. BROTOWNBOY

    BROTOWNBOY Been here awhile

    Joined:
    Oct 5, 2007
    Oddometer:
    316
    Location:
    nth wst nsw
    [​IMG]
    #12
  13. Andy-Gadget

    Andy-Gadget Any bike can go anywere

    Joined:
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    Oddometer:
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    Location:
    Hobart, Tasmania
    Very loosely based on the Moto Guzzi "spine" frame, as seen on the sport1100 and Daytonas.
    A "T" when viewed from above with the steering head being the bottom of the "T" and the swinging arm pivots being the two sides of the top of the "T".

    I say loosely based as he has the frame acting as the airbox, not a Guzzi feature.

    I have a sport1100, and the frame is very ridgid, and I e4xpect that this will be as well.
    Very logical as well, as dirrect a connection between the steering head and the swinging arm pivots as possable.

    [​IMG]
    [​IMG]
    #13
  14. Steve in NZ

    Steve in NZ scared/cheap

    Joined:
    Aug 27, 2001
    Oddometer:
    1,054
    and the BMW has an infinte number less chance of leaking oil:rofl
    #14
  15. Pezz_gs

    Pezz_gs Cant ride for crap

    Joined:
    Nov 13, 2004
    Oddometer:
    4,071
    Location:
    Sydney Skunkworks
    Here are a few more pictures

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    It weighs 183kg less fuel, as stated above this bike was build for a world traveller who wanted to run the BMW pannier system he already owned.

    The battery lies down on top of the frame, which is the airbox, and there is a large tool box which if it was a fuel tank could hold easily 5 litres.

    Paul thinks he can make it a bit lighter yet. I have an order in for one, I think im number 4 at present :evil
    #15
  16. Lornce

    Lornce Lost In Place

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    That's a brilliant effort.

    :thumb
    #16
  17. TX Ryder

    TX Ryder Been here awhile

    Joined:
    Jan 15, 2010
    Oddometer:
    111
    Location:
    North East Texas
    I wish along with the last name, that I also shared Paul's skills. That's some incredible craftmanship he's done, topnotch stuff! Thanks for posting the pics.
    #17
  18. igormortis

    igormortis Cafe Reise

    Joined:
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    London
    Wow. And it still looks like an Airhead.

    How do you guys in Oz register something like that for road use? i.e. an entirely new frame?
    #18
  19. Beemerboff

    Beemerboff Long timer

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    He doest seem to see any benifit it triangulation, so I imagine there wont be many other frame designers who see much merit in the design.

    It also looks like it is intended that the engine /gearbox is a stressed member, but a quick look at BMWs method of attaching the box to the engine will tell you that it was never intended for that purpose.

    Fork angle looks a bit steeper than normal for a offroad bike too.

    Leaves me cold, but there is no accounting for taste , I suppose.
    #19
  20. Lornce

    Lornce Lost In Place

    Joined:
    Aug 17, 2003
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    Location:
    Way Out There.
    [​IMG]

    Box sections are all about cross sectional area. Make no mistake, that frame's hell for strong. The triangulated box section near the swingarm pivot points will be far stiffer than it'd ever need to be to resist any flexing that could ever be produced by those two tire contact patches.

    Stressed member transmission? Wrong again. The engine's held in place, and becomes a bit of a stressed member by virtue of it's shape, though it bears no chassis load. The trans is bolted to the motor, just like a stock airhead.

    Steering geometry appears to be a bit steeper than maybe BMW standards, but well within acceptable norms from manufacturers that build offroad bikes that actually handle well.

    That's three for three.

    You have any opinions founded in substantive reason?

    :ear
    #20