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"Bird of Prey" Bicycle

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Old 03-23-16, 06:57 AM
  #26  
wphamilton
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Originally Posted by BlazingPedals
I'm not too sure about that (although you may be right...) Upright riders tend to ignore the fact that their legs are perpendicular to the airflow no matter what position their upper body is in.
The crank is at about the same height as on a diamond frame, with the seat lower - so for frontal area of the legs it's the same as (or similar to) riding a diamond frame with a low seat. But the lower seat causes her torso to be angled (or arched in this picture) which exposes more area than the time trial biker with a flat back parallel to the ground. So you don't actually gain any area reduction. She is increasing her frontal area.

The drag coefficient is more dynamic, but I suspect that extending the turbulent area by putting her churning legs further back, beyond the wheel even, if anything makes it worse.

I think they're aiming for the "Superman position" aka Obree but I am skeptical that it's an improvement, and both would suffer in higher yaw conditions.

Last edited by wphamilton; 03-23-16 at 07:04 AM.
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Old 03-23-16, 07:07 AM
  #27  
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Originally Posted by JohnDThompson
Good luck getting UCI to approve the design for sanctioned events.
Darn, that cuts out 0.003% of the market!
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Old 03-23-16, 07:41 AM
  #28  
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Originally Posted by tcs
Darn, that cuts out 0.003% of the market!
I suspect that's one of the reasons recumbents have never caught on. Marketing departments like to pattern their recreational road bikes after what the racers use, and those tend to at least superficially follow UCI regulations.
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Old 03-23-16, 09:13 AM
  #29  
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Originally Posted by Retro Grouch
I'd have to study her, both on and off the bike, for an extended period.
Oh, BEEHAVE BABY!



Edit: Previous image wasn't showing up. Harumph!

Last edited by ptempel; 03-25-16 at 07:41 AM.
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Old 03-23-16, 09:46 AM
  #30  
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Originally Posted by JohnDThompson
I suspect that's one of the reasons recumbents have never caught on. Marketing departments like to pattern their recreational road bikes after what the racers use, and those tend to at least superficially follow UCI regulations.
You may have it backwards, UCI regulations require bicycles to at least superficially resemble the recreational bicycles that are ridden by most people.

Regardless, I suspect most people have about the same degree of low/no interest in recumbent bicycles as they do with the intricacies of UCI regulations.
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Old 03-24-16, 04:10 AM
  #31  
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Must be interesting setting off from a dead stop unassisted.
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Old 03-24-16, 08:37 AM
  #32  
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Originally Posted by I-Like-To-Bike
You may have it backwards, UCI regulations require bicycles to at least superficially resemble the recreational bicycles that are ridden by most people.
When Francis Faure beat the Hour record in 1933, the UCI changed its stance from "perfectly acceptable" to "unfair advantage" and banned recumbents. Defining exactly what was allowed came later, and of course "what was allowed" was the geometry that everyone else was already using. Few manufacturers are willing to depart too far from the definition because it would require much different tooling. We've seen innovations over the years, but only the ones that come from the bike manufacturers.
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Old 03-24-16, 01:14 PM
  #33  
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I like the view from my recumbent better. Too much staring at pavement with this one.

But it's not exactly a new concept. The first prone bike was manufactured in 1897 according to Wikipedia.

It's pretty and seems fairly well engineered. The Bird of Prey site mentions using it for triathalons, which might be a good use, racing but not UCI.
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Originally Posted by Bjforrestal
I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.
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Old 03-24-16, 01:32 PM
  #34  
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Originally Posted by MoAlpha
It is pretty clear the pressure is meant to be on the iliac crests, not the abdomen.


I agree.
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Originally Posted by Bjforrestal
I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

Last edited by Artkansas; 03-24-16 at 01:42 PM.
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Old 03-24-16, 02:05 PM
  #35  
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An improvement over the H zontal bike in driving mode, on the H zontal your head is so low that you need special glasses with mirrors to look ahead. Those bikes obviosly need a catchy name, this one is "the bird of prey" the H zontal has "move like a cheetah". But both have the same safety issue, it's not very wise to move with the most vulnerable part of your body in front.
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Old 04-24-16, 08:00 PM
  #36  
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Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
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Old 04-24-16, 08:36 PM
  #37  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
Oh dear!
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Old 04-24-16, 08:46 PM
  #38  
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Originally Posted by Biker395
Is it just me, or does this look profoundly uncomfortable?
No, it is not just you.
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Old 04-24-16, 08:47 PM
  #39  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
GOOD GRIEF! Just ONE MONTH since his last post in this thread.

My condolences to all who knew him.

R.I.P. Gordon.

Cheers
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Old 04-25-16, 05:50 AM
  #40  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
Man, this just guts me, he will be missed here. My thoughts and prayers are with his family and friends. Godspeed, Gordon, peace be with you and your family.

Respectfully,
Bill
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Old 04-25-16, 06:29 AM
  #41  
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This bike is a great example of young engineers reinventing something that was invented years ago, and discarded as basically impractical.

Talk about arriving head first in an accident.
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Old 04-25-16, 06:42 AM
  #42  
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Old 04-25-16, 05:28 PM
  #43  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
Aw, man! I was having a good day until I read this!
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Old 04-25-16, 06:49 PM
  #44  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
That's bad news.
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Old 04-28-16, 04:14 AM
  #45  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
Do you have any more details about this?
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Old 04-28-16, 07:40 AM
  #46  
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Originally Posted by oldnslow2
Now that just looks like a pain in the nads!
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Old 04-28-16, 09:21 PM
  #47  
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Originally Posted by spokes5678
Artkansas is dead,died of a heart attack. Age 62.

RIP Gordon.
Oh nooo....
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