Mallorca Challenge (SPOILER!!!!!)

Talk about competitive road cycling in all its forms
Richmond Racer
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Richmond Racer » Tue Feb 05, 2013 18:56 pm

Bike's already moving forward towards the line away from the center of rider-bike combo mass. Rider moves body back without moving the centre of the mass, and then uses the power of the extended arm thrust to add sharp acceleration over the line.

Or summat.

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ratsbeyfus
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby ratsbeyfus » Tue Feb 05, 2013 19:05 pm

I'm gonna use it tomorrow on the commute rather than pedalling.
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I had one of them red bikes but I don't any more. Sad face.

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OCDuPalais
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby OCDuPalais » Tue Feb 05, 2013 19:29 pm

A whole commute of line lunges: excellent.

People will think you're having seizures - you may well get pulled off by a medic and strapped down. Some us pay good money for that...




It's good when you get a real sense that everybody in a conversation comes out of it enlightened and fully clued up on a matter.

deejay
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby deejay » Tue Feb 05, 2013 20:17 pm

Richmond Racer wrote:Bike's already moving forward towards the line away from the center of rider-bike combo mass. Rider moves body back without moving the centre of the mass, and then uses the power of the extended arm thrust to add sharp acceleration over the line.

Or summat.
I'm almost in agreement there, except about moving the body back. ?
I always thought I was flat out with my body weight in the sprinting position and then just before the line I throw the bike "forward" beneath my body weight which is still moving at my flat out speed.

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ratsbeyfus
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby ratsbeyfus » Tue Feb 05, 2013 20:44 pm

deejay wrote:
Richmond Racer wrote:Bike's already moving forward towards the line away from the center of rider-bike combo mass. Rider moves body back without moving the centre of the mass, and then uses the power of the extended arm thrust to add sharp acceleration over the line.

Or summat.
I'm almost in agreement there, except about moving the body back. ?
I always thought I was flat out with my body weight in the sprinting position and then just before the line I throw the bike "forward" beneath my body weight which is still moving at my flat out speed.


Here, let me explain by means of a simple diagram... I think I've got the gist of it now:

Image
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I had one of them red bikes but I don't any more. Sad face.

@ratsbey

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OCDuPalais
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby OCDuPalais » Tue Feb 05, 2013 20:53 pm

deejay wrote:
Richmond Racer wrote:Bike's already moving forward towards the line away from the center of rider-bike combo mass. Rider moves body back without moving the centre of the mass, and then uses the power of the extended arm thrust to add sharp acceleration over the line.

Or summat.
I'm almost in agreement there, except about moving the body back. ?
I always thought I was flat out with my body weight in the sprinting position and then just before the line I throw the bike "forward" beneath my body weight which is still moving at my flat out speed.



Your bike is going flat out - as powered mostly by your legs (along with some counterweighting and bracing with the rest of your body): I think what RR means is that at the right moment you shift your body slightly in relation to the bike (although I'd say forwards, rather than backwards: you want to maxomise the effect of extending your arms) before throwing it forward in the hope that any extra momentum makes the difference in a tight finish

Richmond Racer
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Richmond Racer » Tue Feb 05, 2013 22:55 pm

^wot the JR Tolkein of the Forum says

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Tue Feb 05, 2013 23:50 pm

We have moving pictures. Not watched them yet, so might be rubbish.

http://www.youtube.com/watch?v=_06kLu8brA4

esspeebee
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby esspeebee » Wed Feb 06, 2013 00:12 am

It's not about momentum, it's about the centre of mass of the bike+rider. Taking the two as a single entity, it's the centre of mass that'll move at whatever speed you're going. Since the rider is considerably heavier than the bike, the centre of mass of the pair is basically just the centre of the rider. If you push your arms forwards, the front wheel is now further forwards compared to the rider, and it's the rider that keeps going at (roughly) the same speed. You don't gain any speed as such, you just put the front wheel a couple of inches ahead of where it would be, which can make all the difference. You'll lose those inches as soon as you return to normal posture, but by that time you're over the line and it doesn't matter.

Cycloslalomeur
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Cycloslalomeur » Wed Feb 06, 2013 08:08 am

I'm fairly thick as well so I just focus on the mass differential. It works because the mass of the rider is so much greater than that of the vehicle. The same thing happens in reverse when you stand up while keeping the power on: the speed of the rider/vehicle system remains unchanged but the bike moves back quite a bit. Yes, I am a wheelsucker and have crashed because of my sins.

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 13:10 pm

Image

55k to go.

Zandio, Madrazo, Serry, Astarloza, Van Emdem, Gesink, Matthews, Cimolai, Thurau y Pfingsten.

40 seconds over a group of 45.

I think.

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 13:16 pm

Nice to see Gesink in early season form. He's away with The Angel Madrazo. Small gap to the group.

Richmond Racer
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Richmond Racer » Wed Feb 06, 2013 13:18 pm

Turfle wrote:Nice to see Gesink in early season form. He's away with The Angel Madrazo. Small gap to the group.



Blanco giving it some welly this early in the season - good for them

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 13:30 pm

45 to go:
Gesink, Madrazo

25 seconds to Zandio, Astarloza, Belda, Thurau

another minute to reduced peloton.

Looking a bit sprinty to me.

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inkyfingers
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby inkyfingers » Wed Feb 06, 2013 13:50 pm

I was going to say it could be a good day for Ben Swift considering how well he rode yesterday, but have just read on twitter that he's crashed badly on one of the descents.
"I have a lovely photo of a Camargue horse but will not post it now" (Frenchfighter - July 2013)

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 13:54 pm

Yep, sounds a not so good one. The highs and lows of riding a bike. Get well soon Swifty.

24k to go.

The 5 (Belda dropped) are back together, with 30 seconds or so to a reduced peloton.

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 14:02 pm

Gesink and Madrazo go again, and may just have it.

25 seconds back to the other three. A further 40 seconds to a 40 man peloton.

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 14:13 pm

A sprint is a-coming.

Turfle
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Turfle » Wed Feb 06, 2013 14:20 pm

And Leigh Howard gets his second win of the week.

Richmond Racer
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Re: Mallorca Challenge (SPOILER!!!!!)

Postby Richmond Racer » Wed Feb 06, 2013 14:21 pm

inkyfingers wrote:I was going to say it could be a good day for Ben Swift considering how well he rode yesterday, but have just read on twitter that he's crashed badly on one of the descents.


He's been carted to hospital. If he's broken something, I've lost count of the number of breaks that will be for him over the last 2-3 years.


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