SCIENCE!

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jimmythefly
jimmythefly's picture
SCIENCE!

This is not april fools. This is not a drill.

Quote:
Bike with adjustable head angle and trail with 3 channel analogue data recorder.

https://www.flickr.com/photos/78152658@N05/26099788221/in/photostream/

Fri, 04/01/2016 - 15:52
ShartAttack
ShartAttack's picture

lol

I can't hate it, but as an experiment I'm not sure you can learn anything from the headtube gizmo, since you're radically changing the top-tube length. Still impressive tho. Is that a 90 HTA on the far one?

Former RAGBRAI enthusiast

Fri, 04/01/2016 - 15:59
ShartAttack
ShartAttack's picture

Also curious as to whether this is a cheaper/better solution than actually just building all of the fork/HTA permutations on different frames and forks.

Former RAGBRAI enthusiast

Fri, 04/01/2016 - 16:00
Andrew_Squirrel
Andrew_Squirrel's picture

Quote:
-32 to 95mm trail, head angles of 64.5, 73, 81.5 and 90 degrees

Fri, 04/01/2016 - 16:20
turpencat
turpencat's picture

neat that it exists but it won't behave the same way as a real bikes with those geos

johnnyraja wrote:
If you've never done it then yes, it's very surprising.

Fri, 04/01/2016 - 16:26
The RTS
The RTS's picture

I'm digging the rear brake

Fri, 04/01/2016 - 17:00
biek

tc: i have no idea what's going on with most of that stuff on that bike.

pappaheugwang wrote:
u mad bro?

Fri, 04/01/2016 - 17:06
euclid
euclid's picture

lean angle, front wheel angle, force on bars? The three traces will be out of phase, would be better with separate y axes.

Fri, 04/01/2016 - 17:27
eric_ssucks
eric_ssucks's picture

What the hell is the analog data recorder gonna do? Isn't most bike geo done using the "ass metric" anyways?

Fri, 04/01/2016 - 17:29
lukasz
lukasz's picture

that's for measuring tectonic plate movement actually.

Fri, 04/01/2016 - 17:44
eric_ssucks
eric_ssucks's picture
(Reply to #10)

lukasz wrote:
that's for measuring tectonic plate movement actually.

No no, you measure tectonic plate movement using geodetics. That's what your garmin is for.

Fri, 04/01/2016 - 17:46
JUGE FREDD
JUGE FREDD's picture
(Reply to #11)

ShartAttack wrote:
I can't hate it, but as an experiment I'm not sure you can learn anything from the headtube gizmo, since you're radically changing the top-tube length.

the cockpit can stay in nearly the same place throughout all the adjustments

illustrates even more how completely irrelevant "top tube length" is, effective or otherwise

the fork moves around independently from the steerer tube, unless they coincide in the same headtube

the stem actually attaches through a third headset stacked on top in the pictured setup, not sure what that's about, looks like isolation for one of the measurements

It's a struggle, but you cut out his tongue, and his last words are "atmo atmo Atmo ATMO ATMOOOOOGORIHGGHRSHGGRLMGGMMGMgrrglegurglegrr....."
– akasnowmaaan

Fri, 04/01/2016 - 18:38
euclid
euclid's picture
(Reply to #12)

euclid wrote:
lean angle, front wheel angle, force on bars? The three traces will be out of phase, would be better with separate y axes.

Also the pen lever arms are different lengths so the traces will be out of phase by different amounts at different magnitudes.

Fri, 04/01/2016 - 18:43
euclid
euclid's picture
(Reply to #13)

JUGE FREDD wrote:
ShartAttack wrote:
I can't hate it, but as an experiment I'm not sure you can learn anything from the headtube gizmo, since you're radically changing the top-tube length.

the cockpit can stay in nearly the same place throughout all the adjustments

illustrates even more how completely irrelevant "top tube length" is, effective or otherwise

the fork moves around independently from the steerer tube, unless they coincide in the same headtube

the stem actually attaches through a third headset stacked on top in the pictured setup, not sure what that's about, looks like isolation for one of the measurements

The stem is attached to the steerer through that spring mechanism that you can see in one of the flickr photos. The spring deflection, which is measured, is proportional to the force on the bars about the steerer.

Fri, 04/01/2016 - 18:46
Andrew_Squirrel
Andrew_Squirrel's picture

How does the fixed part of this arm not bottom out? Are they expecting to only roll around on extremely flat surfaces? Seems like even a slight bump in the pavement would be bad.

Adjustable geometry bike by Robin Mather, on Flickr

Fri, 04/01/2016 - 18:51
lbthomps
lbthomps's picture
(Reply to #15)

The RTS wrote:
I'm digging the rear brake

I don't think it has a rear brake.

Sat, 04/02/2016 - 11:52
euclid
euclid's picture
(Reply to #16)

Andrew_Squirrel wrote:
How does the fixed part of this arm not bottom out? Are they expecting to only roll around on extremely flat surfaces? Seems like even a slight bump in the pavement would be bad.

Adjustable geometry bike by Robin Mather, on Flickr

Or even letting the tire pressure get too low

Sat, 04/02/2016 - 13:19
drwelby
drwelby's picture

Is this SCIENCE! or STEAMPUNK! ?

I can't tell.

Naturally, this bike is partially tarck's fault.

Sat, 04/02/2016 - 13:26
JUGE FREDD
JUGE FREDD's picture
(Reply to #18)

euclid wrote:
Or even letting the tire pressure get too low

they're Marathon XRs

fuckers stand up on their own

It's a struggle, but you cut out his tongue, and his last words are "atmo atmo Atmo ATMO ATMOOOOOGORIHGGHRSHGGRLMGGMMGMgrrglegurglegrr....."
– akasnowmaaan

Sat, 04/02/2016 - 13:53
Petr5
Petr5's picture

nm dumb

Sneaky Viking wrote:
"Your bike sucks and we have a team of biased experts to pseudo-scientifically test that hypothesis, all in blue shirts."

Sat, 04/02/2016 - 14:17
Goddamnit Gunther
Goddamnit Gunther's picture
(Reply to #20)

drwelby wrote:
Is this SCIENCE! or STEAMPUNK! ?

I can't tell.

Found this pic of the builder

Endpoint wrote:
turdly buttways

Sat, 04/02/2016 - 15:34
crowding
crowding's picture
(Reply to #21)

JUGE FREDD wrote:
the stem actually attaches through a third headset stacked on top in the pictured setup, not sure what that's about, looks like isolation for one of the measurements

i think it's added spring in the steering column to help distinguish steering input from feedback

This is an impressive commitment to analog data collection

Sat, 04/02/2016 - 20:30
Sandbagbear
Sandbagbear's picture

For those of us who refuse to click the link because lazy,
What revelations will this data bring for the multi head tube bicycle industry?

Sat, 04/02/2016 - 20:49
.
.'s picture

I like how they painted dirt on the tires. Steampunk holocaust when

Sun, 04/03/2016 - 10:06
b-roll
b-roll's picture

Sheldon's gone, but I bet he's totally happy about this thing in the afterlife.

"Long story short: I'm stupid, but stupid like a fox."

Sun, 04/03/2016 - 22:45