2012 BMC Time Machine TM01

Discuss light weight issues concerning road bikes & parts.
hansonator69
Posts: 643
Joined: Sun Apr 24, 2011 6:23 am
Location: Melbourne, Australia

by hansonator69

So... It's finally released. Time to start saving... :wink:

Image

Image

More here.
Slam your stem.

ricerocket
Posts: 502
Joined: Mon Sep 27, 2010 8:38 am

by ricerocket

Easton needs to come up with a less obnoxious decal for those TT wheels.

by Weenie


Mikmik
Posts: 313
Joined: Tue Sep 28, 2010 10:30 pm

by Mikmik

It must be reeeeeeealy good...look at the dude's response in the second picture (the one with the glasses).
It's not how much you spend on a bike it's how hard you can ride it.

Mikmik
Posts: 313
Joined: Tue Sep 28, 2010 10:30 pm

by Mikmik

LOVE the front brake calliper idea too. Looks like a few bike manufacturers are catching on that idea
It's not how much you spend on a bike it's how hard you can ride it.

hansonator69
Posts: 643
Joined: Sun Apr 24, 2011 6:23 am
Location: Melbourne, Australia

by hansonator69

Mikmik wrote:It must be reeeeeeealy good...look at the dude's response in the second picture (the one with the glasses).

Ah... the drooling of bike envy :mrgreen:
Slam your stem.

Mikmik
Posts: 313
Joined: Tue Sep 28, 2010 10:30 pm

by Mikmik

hansonator69 wrote:
Mikmik wrote:It must be reeeeeeealy good...look at the dude's response in the second picture (the one with the glasses).

Ah... the drooling of bike envy :mrgreen:


I bet he is on the verge of not being able to stop himself from touching it.....neither would I :)
It's not how much you spend on a bike it's how hard you can ride it.

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kavitator
Posts: 1141
Joined: Sun Sep 21, 2008 9:07 pm
Location: Slovenia---that forest land

by kavitator

is it the most aero? (faster than Trek,Speci, Cucuma..)

spinwax
Shop Owner
Posts: 964
Joined: Wed Dec 05, 2007 7:14 pm
Location: USA

by spinwax

kavitator wrote:is it the most aero? (faster than Trek,Speci, Cucuma..)


I would say no, but I am no Aerodynamicist.

I think they missed the boat not continuing the frame around the rear wheel for a longer distance like the the DA or P series bikes. I think test show a fairing over the wheel does help clean up air. There is a reason the P3 has been so successful with it's enclosed rear wheel design and why so many others have followed a similar path.

roca rule
Posts: 678
Joined: Sun Sep 28, 2008 2:23 am
Location: so. cal.

by roca rule

i think this bike is illegal under uci rules.

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USofChay
Posts: 425
Joined: Tue May 25, 2010 11:24 pm

by USofChay

roca rule wrote:i think this bike is illegal under uci rules.

why?

justkeepedaling
Posts: 1340
Joined: Thu Jan 03, 2008 6:14 am
Location: by Crystal Springs (Sawyer Creek Trail)

by justkeepedaling

I'm an aero engineer, and I would go all in on the fact that this isn't really all that aero. Subjective, but pretty ugly as well

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dopesick187
Posts: 141
Joined: Sat May 22, 2010 1:07 pm
Location: Holmfirth

by dopesick187

I'm liking the Ride BMC T in pic 1 :thumbup:
Bomb hills, not countries
Kill the bosses
Kill the priests
Kill the shepherds
Save the sheep
XVX

hansonator69
Posts: 643
Joined: Sun Apr 24, 2011 6:23 am
Location: Melbourne, Australia

by hansonator69

justkeepedaling wrote:I'm an aero engineer, and I would go all in on the fact that this isn't really all that aero. Subjective, but pretty ugly as well

I'm no aero engineer, but just by looking at the sharp corners on the seat stay/seat tube join, that will create vortices. (like the Specialized Transition)

According to BMC, the truncated aerofoil with "tripwire" is more aero than a standard aerofoil, but then again they would say that...

Image
Slam your stem.

leardriver
Posts: 44
Joined: Fri Apr 22, 2011 11:53 pm

by leardriver

I can see that working to an extent. On our Learjet's we have boundary layer energizers which create small disturbances in the boundary layer of air as it moves over them. By creating a small amount of turbulence (relative to the total volume of air moving past) in the boundary layer you can make the airflow stay attached longer. AIrplanes use them to delay portions of the wing stalling until a slower airspeed but the concept would work on aero bikes to reduce drag by keeping laminar (smooth) flow longer.

Having said all that, that is coming from a pilot and all engineers will tell you know pilots don't know squat. :lol:

justkeepedaling
Posts: 1340
Joined: Thu Jan 03, 2008 6:14 am
Location: by Crystal Springs (Sawyer Creek Trail)

by justkeepedaling

Yep :) It works on Learjets because the Reynold's number is so different that it is much more difficult to maintain laminar flow and preventing early separation. Nowadays, there are specific airfoils like the NLF-0215 or NLF-0416 with specific geometry to delay separation by having a thicker midsection than a complete teardrop. This works big time at over 100 mph. Not so much at bike speeds.

by Weenie


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