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Thread: The Tonewood Project: Lyrebird Cycles

  1. #21
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by Mark Kelly View Post
    "Baum" is, of course, "wood" in German.
    Actually, "baum" would be "tree". "Holz" is wood.
    DT

    http://www.mjolnircycles.com/

    Some are born to move the world to live their fantasies...

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  2. #22
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by David Tollefson View Post
    Actually, "baum" would be "tree". "Holz" is wood.
    Yeah I realised that about eleven minutes after I posted.

    Obviously couldn't see the trees for the wood.
     

  3. #23
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    Default Re: The Tonewood Project: Lyrebird Cycles

    A few more Ks this morning. Initial concerns over the harshness of the front end have faded away - it now just feels planted and solid. Equally though, if one of Mark's future customers wanted a slightly softer front end, I reckon that could be easily achieved with a slightly less firm fork.

    It's a shame my 'zetti is in a state of partial undress at the moment because I really feel like I need to do a back-to-back comparison. I would do a loop of the local hill, head back, switch the same wheels across onto the other bike and do another loop. Purely out of intrigue, but it could be useful for me to understand the differences against my favourite bike (which this was loosely based on, geometry-wise) and to give Mark more feedback.

    Perhaps I'll re-dress the 'zetti briefly before I strip it completely (it only needs a BB, chainset and chain to go back on) and give this a try...

    Anyway, this is a gallery so...



    Testing a set of wheels for a mate = chance to see how it looks in stealth mode. Needs the skinwalls I reckon. Really must do something about that fork logo too...

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by RichTheRoadie View Post
    Unfortunately I have made an unwelcome discovery: Given that my other bike is a Gaulzetti, I now either ride cock, or wood. Hmmm...
    It gets worse: I just ordered a FAT Bike, so I now either ride cock, wood or a chubby.

    Anyway...

    More miles on this thing. It's my go-to bike at the moment, and I can't decide whether that's because the Gaulzetti isn't fully built at the moment, or because this woody is too damn intriguing, interesting and exciting to bother putting a chain, BB and pair of cranks back on my 'zetti. In fact, given that my ride time isn't as plentiful as it used to be (and because my wife *still* won't let me sell the Baum) it even crossed my mind to sell the 'zetti... but I don't think I could.

    There's also the fact that I can't help liking the reaction of other riders when they get passed by a bloke on a bike that looks like wood! I've lost count of the number of times I've been asked whether it's just a paint job too.

    Finally, I found the comment on my Cycle EXIF Turn crank review , when responding to my suggestion that "there's no flex anywhere in the setup", quite amusing: "How could you possibly tell? You have them mounted on a wooden bicycle." - if only he knew...

  5. #25
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by RichTheRoadie View Post
    I found the comment on my Cycle EXIF Turn crank review , when responding to my suggestion that "there's no flex anywhere in the setup", quite amusing: "How could you possibly tell? You have them mounted on a wooden bicycle."
    Some of you might find Mark's response to this comment quite interesting:

    "To put some numbers on this: the red toned wood in the pic is Eucalyptus grandis, E is 17 GPa, density is 0.65 so the stiffness to weight ratio is 26, slightly higher than that of aluminium, titanium or stainless steel (all around 25)."

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Specific modulus is quite similar for most standard engineering materials, but as density decreases, you need to use more of it. I.e. more volume, to maintain your section modulus, which becomes a problem when you're geometrically constrained, eg tyre/chainring, or why this bike didn't have wood chainstays.

    Cambridge materials selector lets you chase down as many variables as you care to specify using Ashby's method and home in on the most appropriate material to use. (Or highlight why what seems to be an inappropriate or old fashioned material is actually a high performer)

    And, of course, CF has a specific modulus 3-5x that of the best timber.





    TL;DR I recommend reading The new science of strong materials by Gordon as a good intro for some materials science. And whoever said that stiffness was the primary factor in constructing a great frame anyway.
     

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    Default Re: The Tonewood Project: Lyrebird Cycles

    I find it wryly amusing that someone who's never seen this bike is telling me how to design it - after the fact.
     

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by Mark Kelly View Post
    I find it wryly amusing that someone who's never seen this bike is telling me how to design it - after the fact.
    And I find it amusing that you think I'm telling you how to design it. Please don't take umbrage where none is given.
     

  9. #29
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    Default Re: The Tonewood Project: Lyrebird Cycles

    I thought it was inappropriate that I've put 52s on 'Woody' for this weekend:



    But as a mate said: "the rest of it is so nuts you could put 80s in there and it would still not look out of place". He might have a point.

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by RichTheRoadie View Post
    I thought it was inappropriate that I've put 52s on 'Woody' for this weekend:



    But as a mate said: "the rest of it is so nuts you could put 80s in there and it would still not look out of place". He might have a point.
    Given all the black components, I'd say it looks pretty balanced.
     

  11. #31
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Finally got my Gaulzetti back together for that back-to-back comparison I was planning:



    - Similar geometry (420mm chain stays, 79mm BB drop, 45 rake forks Vs 415mm, 76mm BB drop, 50 rake forks being the main differences)
    - Similar setup (except DA9000 Vs Force)
    - Very similar saddle (Arione 00 Vs K:1)
    - Same position (lever hood length aside)
    - Same bars
    - Same wheels (wide format 50mm carbon clinchers on 25c Veloflex)
    - Same route
    - One bike wood (sort of, mostly), one steel

    I did this partly out of curiosity and partly to attempt to give Mark more feedback. Clearly it was an entirely unscientific test, and - although I did record each loop - the feedback is 100% subjective as I suspect the only differences in timing would be based more on traffic lights than anything else (and I don't run power).

    Perhaps the biggest surprise was how similar the bikes felt. This may seem obvious, based on the steel chain stays of the Lyrebird - but that's just 2 of 11 tubes (ok, 8 if we leave the fork out of the equation). I half-expected - and sort of hoped - to be reminded of just how damn good the Gaulzetti is and to realise that the Lyrebird wasn't quite as spectacular as I had led myself to believe. The Gaulzetti felt a little more compact (probably due to those slightly shorter stays, but I suspect partly the smaller Force levers too), but the Lyrebird felt more planted (perhaps the longer chain stays and lower BB) and smoother.

    The biggest eye-opener was that, despite how much I love my Gaulzetti, I think Woody might have just knocked it off its perch...

  12. #32
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Thanks Rich.

    "More planted and smoother" is as good a description of what I'm trying to achieve as any I can think of.
     

  13. #33
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Now up on Cycle EXIF.

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Wow. Cool.
     

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by velowood View Post
    Wow. Cool.
    A guy named velowood needs one of these...

    SPP
    My name is Peter Miller.

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    Default Re: The Tonewood Project: Lyrebird Cycles

    Quote Originally Posted by SlowPokePete View Post
    A guy named velowood needs one of these...

    SPP
    Well, I could change my name? does that qualify?
     

  17. #37
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Mounted my Mavic Reflex Ceramic / WI T11 / Veloflex Arenberg wheels on this last week, and finally got out on it with them on today:



    Just sublime. It's *wonderful* when a bike purrs along like this did today.

    The only issue is that with these wheels the cranks and brakes really do look out of place. Might be time for a full DA9000 group on this bike now...

  18. #38
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    Default Re: The Tonewood Project: Lyrebird Cycles

    Cool frame! Are you lugging these things internally?
    Warwick Gresswell Bicycle Designer, Raconteur and now.....Framebuilder.
    Wolgich Composites
    BCBA - Bespoke Carbon Bicycles Australia - Facebook Group

  19. #39
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    Default Re: The Tonewood Project: Lyrebird Cycles

    No.

    Construction methods used are currently in a state of flux (yes that was intentional).

  20. #40
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    Default Re: The Tonewood Project: Lyrebird Cycles

    This was inevitable:



    Interesting / exciting developments in discussion at the moment too...

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