wheelie crash question?

---- · World Chat Champion Joined: 29 Sep 2006 Karma :

Just wondering really.
I've been watching a load of video's on youtube,and you see people doing a wheelie, and as they land it the front wheel wobbles, and before they know it there off.

So what causes the bars to wobble when you come down from a wheelie?
Is it because your steering's not straight when you land?

Im curious,as i've been doing a lot more wheelies lately than i used to,so i want to know what to be carefull of.

Thanks

Dave

DidierD · Brolly Dolly Joined: 16 Nov 2007 Karma :

Basically, you need to avoid a tankslapper happening.

DidierD · Brolly Dolly Joined: 16 Nov 2007 Karma :

---- · World Chat Champion Joined: 29 Sep 2006 Karma :

So it's as simple as keeping your bars straight as you land Very Happy

TBH i thought there was a bit more to it than that,as some of the accidents i see look like they done everything right,then it just goes all to shit.

Cheers m8 Thumbs Up

I could have done a search for it myself,but i could'nt be bothered,so i thought id ask on here then let someone else do the work for me Laughing

(hey, why not,everyone else does it Laughing

)

JK m8 Thumbs Up

Thanks
Have some Karma

DidierD · Brolly Dolly Joined: 16 Nov 2007 Karma :

Just remember not to touch the front brake as well you dont want a tyre thats not going anywhere when u land, this might not help your cause, also if your hand is on the front brake when you land you're not going to end up very healthy looking Wink

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hmmmnz · Super Spammer Joined: 22 Aug 2006 Karma :

its not so much landing with your wheel straight, its the fact that your front wheel isnt moving but the road under it is doing say 60mile an hour, so when the wheel lands it has to get to 60 quick,
effectivly its like locking up your wheel..
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---- · World Chat Champion Joined: 29 Sep 2006 Karma :

Nixon · Brolly Dolly Joined: 23 Jun 2007 Karma :

you cant stop it its physics can only try control it by having a good steering damper and skill

or you could attach a secondary motor to the front wheel so that once the wheel is off the floor the wheel velocity can be matched to the road speed lol but that would be a bit ghey!

colin1 · Captain Safety Joined: 17 Feb 2005 Karma :

you can stop it to some extent

you accelerate out of it

this takes weight off the front wheel so it can straighten up, whereas braking would make it worse

its nothing to do with matching the front wheels speed to the road

its about landing the front wheel when its at a slight angle, ie turned bars not straight ahead
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TUG · World Chat Champion Joined: 12 May 2007 Karma :

Nixon · Brolly Dolly Joined: 23 Jun 2007 Karma :

wheel velocity is a factor aswell possibly not as noticable as the bars not being straight but is still there:

if you throw an object reliyng on true gyroscopical force - equal force exerted on all axis - (such as a tennis ball) onto a motion less object (such as the road) the ball will bounce due to the energy being transferred away rather than being transferred through

so like a tennis ball thrown onto the road it will bounce back up now iff you could throw it with the correct velocity then the equal and opposite forces will counter act eliminating each other meaning the wheel will touch with equal forces - an impossible thing to achieve on the road

so wheel velocity does play a part other wise it wold just touch perfectly and having the bars turned wouldnt be a problem as you could just steer into it