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Factor Slick

RashRash Member
Interesting. That's as detailed as my bike knowledge can go. I am sure others might have more in depth opinions.

http://www.cyclingnews.com/news/factor-unveil-slick-time-trial-bike-for-paris-nice/

Comments

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    MattMatt Member, Administrator
    edited March 7
    Interesting...
    Questions
    Can the aerobars tilt?
    Why isn't the Di2 junction box hidden?
    The Twin Vane in the downtube is obviously from Factor's previous bikes, but also the Willier Twin Blade and Ridley's aero line
    Tri accessories?

    Like
    Vertical drop out
    Wedge front brake
    28mm tire clearance
    Removable FD Hanger to go 1x

    Dislike
    Under BB rear brake
    Spotty finish near the BB. Early version cosmetic issues are always a headache.
    RashAaronWebsteyGasBomb
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    MartinMartin Member
    Can I get a split water bottle to better take advantage of the split tube?
    MattRashAaronWebsteyKenElPescadoPelado
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    simonsen77simonsen77 Member, TRS/Baucco Team Member
    That rear brake under the BB will likely take a mechanic a loooong time to repair while Bardet is stuck hanging on to the team car.
    wchevronEvanMattRashAaronWebsteyKenElPescadoPeladoGasBombneil5young
    First #BAAW Badge Recipient
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    ellsworth53tellsworth53t Member, TRS/Baucco Team Member
    Martin said:

    Can I get a split water bottle to better take advantage of the split tube?

    And is dually 23c rear wheels better for aerodynamics while giving some loss in rolling resistance?
    KenElPescadoPelado
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    ellsworth53tellsworth53t Member, TRS/Baucco Team Member
    In all seriousness, I would genuinely be interested in seeing the wind tunnel results from this exact bike with the split down tube compared to a single, traditional downtube.
    I'm no engineer, but I am skeptical that a split tube like that would perform any better than a single tube. At best, I would guess it tests about the same.
    AaronWebstey
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    ellsworth53tellsworth53t Member, TRS/Baucco Team Member
    edited March 7

    In all seriousness, I would genuinely be interested in seeing the wind tunnel results from this exact bike with the split down tube compared to a single, traditional downtube.
    I'm no engineer, but I am skeptical that a split tube like that would perform any better than a single tube. At best, I would guess it tests about the same.

    I mean, on second thought, it almost certainly tests worse, right? Unless the two tubes are creating smaller frontal area than a single tube, it has to be marginally worse, right?
    Likewise, the space between the tubes has to be filled with turbulent air further increasing the drag.
    AaronWebstey
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    Tad_MachrowiczTad_Machrowicz Member, TRS/Baucco Team Member, Level 2 Supporter
    Who knows @ellsworth53t , i'd like to see some data with all other factors held constant, but the likelihood of a well done A vs. B test being done is nil. Depending on pressures between tires and downtube and the shape of the channel, they may be onto something there. Even the way the airflow reattaches past the downtube could be manipulated to create a venturi effect. Laminar vs. turbulent may or may not be in play as you said, but let's see the data at multiple yaw angles/speeds. Is pressure build behind the tire and in front of the downtube an area that others haven't mined yet for speed? Maybe Factor thinks so.
    AaronWebsteyellsworth53t

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    RashRash Member
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    KHilgendorfKHilgendorf Member
    edited March 8

    In all seriousness, I would genuinely be interested in seeing the wind tunnel results from this exact bike with the split down tube compared to a single, traditional downtube.
    I'm no engineer, but I am skeptical that a split tube like that would perform any better than a single tube. At best, I would guess it tests about the same.

    I mean, on second thought, it almost certainly tests worse, right? Unless the two tubes are creating smaller frontal area than a single tube, it has to be marginally worse, right?
    Likewise, the space between the tubes has to be filled with turbulent air further increasing the drag.
    Turbulent isn't a bad thing in all cases. There are scenarios where adding turbulent flow boundary layers can reduce friction (dimples anyone?). It can also be used to fill in empty space to create a more uniform body that react with the fluid as a whole, rather than multiple bodies that collide individually, thus reducing the system drag. Not saying either is the case with the bike in question, just that turbulent =/= "bad"

    Disclaimer: I am an engineer.
    Tad_Machrowiczellsworth53tMattM_WareAaronWebstey
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    Tad_MachrowiczTad_Machrowicz Member, TRS/Baucco Team Member, Level 2 Supporter
    So true @KHilgendorf , the disclaimer however wasn't really necessary. Kind of like the Zebra in a horse corral saying "by the way guys, I'm a Zebra".
    That's a compliment, by the way.
    M_WareGasBombMartinAaronWebsteyCraig D

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    MattMatt Member, Administrator
    Considering the team from Factor has an F1 background and you see all those splits/vents in the hypercars these days, I'd say it has some merit. Mostly at 200+ km/h, maybe a bit less at 45 km/h
    GasBombAaronWebstey
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    @Matt, those splits/vents are there for a few reasons - brake cooling, cold air intake being important, but mostly for downforce. They actually increase overall drag and ultimately slow the car down as a means to keep them on the road in the corners. It's why a lot of them now have adjustable spoilers that will tuck away when you're really hammering it. If you watch F1, the DRS opens a vent in the rear wing to reduce downforce and allow the car to go faster to make a pass. None of that is particularly applicable to bicycles when handling isn't a concern and overall drag reduction is paramount.
    MattTad_MachrowiczGasBombAaronWebstey
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    I'm loving the new trend of adjustable aero bars that can be done on the fly and don't look terrible.
    AaronWebstey
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    @Tad_Machrowicz sorry, disclaimer should have read, "former engineer" I don't have a job. And am currently slumming it in business school.
    KenElPescadoPeladoTad_MachrowiczAaronWebstey
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    Tad_MachrowiczTad_Machrowicz Member, TRS/Baucco Team Member, Level 2 Supporter
    Rock on @KHilgendorf , that means you're a smart engineer! Well done and best success at school!
    AaronWebstey

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