Holeshot Idea

wildbill
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wildbill
Would a simple wind up spring, loaded with several revolutions of energy in the front tire, feasibly help someone get out of the gate quicker with a flatter trajectory?
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TXDirt
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TXDirt 3/28/2017 6:42pm
3/28/2017 6:42pm
wildbill wrote:
Would a simple wind up spring, loaded with several revolutions of energy in the front tire, feasibly help someone get out of the gate quicker with...
Would a simple wind up spring, loaded with several revolutions of energy in the front tire, feasibly help someone get out of the gate quicker with a flatter trajectory?
Im not sure this would help. Holeshots are more about technique and experience then a mechanical device. Some people know how to be good starters and others struggle with it. A mechanical device won't necessarily change anything. Good starters will still be good starters and bad starters will still struggle. It's as much or more mental then mechanical.
wildbill
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wildbill 3/28/2017 6:42pm
3/28/2017 6:42pm Edited Date/Time 3/28/2017 6:43pm
I gotta know if it would work first, physics wise. It should help keep the bike straight with the gyro force. Especially carrying the front wheel.
StevieTimes
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StevieTimes 3/28/2017 6:44pm
3/28/2017 6:44pm
...like those toys that you pull back, let go, and they zoom away?

That seriously is a fantastic idea, if it can be done without adding too much weight.

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crusty_xx
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crusty_xx 3/28/2017 6:52pm
3/28/2017 6:52pm
I don't know. Kind of makes sense theoretically but I don't think it would help practically.
The gyro force depends on the turning speed of the front wheel (which can't be very high if you use a preloaded spring) and the weight of the front wheel (which is low compared to the rest of the bike).

And the effect that you have another wheel turning won't do that much either because the weight shifts backwards and the front wheel hardly has any traction (also it goes over the gate after about 1/4 revolutions).
Maybe on a very slick surface with very little traction it could help a little
disbanded
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disbanded 3/28/2017 6:54pm
3/28/2017 6:54pm
It depends on if the conveyor belt is moving or not
kzizok
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kzizok 3/28/2017 7:14pm
3/28/2017 7:14pm Edited Date/Time 3/28/2017 7:16pm
Doug Domokos.

OP, its actually an interesting thought. The main issue is, in a very short period of time, it would no longer be an advantage.
F150Motocrosser 3/28/2017 7:14pm
3/28/2017 7:14pm
I bet you could've walked into HRC or Factory Suzuki in the early 1980s, pitched this, and walked out with a job in R&D
mingham97
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mingham97 3/28/2017 7:16pm
3/28/2017 7:16pm
The front wheel rarely touches the ground in SX starts.
kzizok
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kzizok 3/28/2017 7:17pm
3/28/2017 7:17pm
mingham97 wrote:
The front wheel rarely touches the ground in SX starts.
I think that is part of his point.
CarlinoJoeVideo
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CarlinoJoeVideo 3/28/2017 7:26pm
3/28/2017 7:26pm
mingham97 wrote:
The front wheel rarely touches the ground in SX starts.
That's what I was thinking. Cool idea though.
Mr. G
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Mr. G 3/28/2017 7:27pm
3/28/2017 7:27pm
Retractable wheelie bar.
SmokinJoe439 3/28/2017 9:16pm
3/28/2017 9:16pm
Pretty sure it was all ready tried for some reason I vaguely remember it in a magazine in the 90s or early 2000's.
wildbill
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wildbill 3/28/2017 9:24pm
3/28/2017 9:24pm
Yep, it'd get you over the gate quicker and then provide added stability during your extended wheelie into holeshot heaven.
APLMAN99
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APLMAN99 3/28/2017 9:42pm
3/28/2017 9:42pm
If it truly was storing any significant amount of energy, the rider's efforts to "hold the bike back" would probably result in decreased reaction and negate any positive effect.
wildbill
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wildbill 3/28/2017 9:49pm
3/28/2017 9:49pm
True, although maybe that much stored energy wouldn't be needed for benefit. My starts significantly improved after loading the clutch and holding with the front brake. Similar circumstance.
mingham97
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mingham97 3/28/2017 10:05pm
3/28/2017 10:05pm Edited Date/Time 3/28/2017 10:05pm
mingham97 wrote:
The front wheel rarely touches the ground in SX starts.
kzizok wrote:
I think that is part of his point.
A spring loaded front wheel will not keep the front down LaughingLaughing a motorised FW maybe
The whole idea of a spring loaded front wheel is absurd and don't even know why I commented on this to be honest
Starvin_Martin 3/28/2017 10:22pm
3/28/2017 10:22pm
And let's not forget about the unsprung weight it would add..

Interesting concept, but I think that's about it.

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mx617
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mx617 3/28/2017 10:48pm
3/28/2017 10:48pm
It might give one team an advantage for a few rounds. By the end of the season everyone would have their own version. See: holeshot device currently on every sx fork.
RussB
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RussB 3/29/2017 12:02am
3/29/2017 12:02am
I like the thought, in theory it could be a good idea.
However, if you had enough tension/energy stored up in the front wheel to actually make a difference, I think you would lose nearly all of it in free spin either from the front wheel lifting up from the jump of the initial launch or when it contacts the backside of the gate which is incredibly slippy and wont provide any significant traction or drive.
Acidreamer
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Acidreamer 3/29/2017 4:05am
3/29/2017 4:05am
Any spring that small would be to weak to really have an effect. The motor is gonna bring the front wheel up refardless
tcallahan707
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tcallahan707 3/29/2017 7:03am
3/29/2017 7:03am
How about we get rid of any starting devices and let skill win out?
kaptkaos
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kaptkaos 3/29/2017 7:08am
3/29/2017 7:08am
tcallahan707 wrote:
How about we get rid of any starting devices and let skill win out?
Amen brother
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wildbill
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wildbill 3/29/2017 11:34am
3/29/2017 11:34am
Some of you bro's aren't any fun at all. Fuckers! Wink
Jamal#440
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Jamal#440 3/29/2017 1:53pm
3/29/2017 1:53pm
Who patented the holeshot device?

it used to be all mental to get the holeshot but you gotta have the device now.
In my last days on minis(1987) I figured out if I compressed the forks and kept
them as far down as I could I would get the shot..(I was big enough and my CR80
was a rocket)..but when I moved up to 125s even though I wasnt big enough to
compress them anymore- I still got alot of holeshots because the confidence was there.
huck
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huck 3/29/2017 2:05pm
3/29/2017 2:05pm
Jamal#440 wrote:
Who patented the holeshot device? it used to be all mental to get the holeshot but you gotta have the device now. In my last days...
Who patented the holeshot device?

it used to be all mental to get the holeshot but you gotta have the device now.
In my last days on minis(1987) I figured out if I compressed the forks and kept
them as far down as I could I would get the shot..(I was big enough and my CR80
was a rocket)..but when I moved up to 125s even though I wasnt big enough to
compress them anymore- I still got alot of holeshots because the confidence was there.
How would you compress them going down the straight?
Andy_Greenney 3/29/2017 2:07pm
3/29/2017 2:07pm Edited Date/Time 3/29/2017 2:08pm
The front wheel would be useless for providing any sort of drive off the line, in a lot of cases it doesn't touch the floor for a few meters out of the gate, if it was and you put power through it the loss of grip would be scary.

Much more beneficial would be anti-wheelie and traction control used in a lot of superbikes now days, on a relay that cut the system out after 3rd/4th gear is reached.
Sidecar
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Sidecar 3/29/2017 2:43pm
3/29/2017 2:43pm
How about locking the rear end to make it rigid for the start.... Look how fast a speedway bike comes out of the gate.
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cable 3/29/2017 2:54pm
3/29/2017 2:54pm
Sidecar wrote:
How about locking the rear end to make it rigid for the start.... Look how fast a speedway bike comes out of the gate.
didn't someone try rear holeshot device in the last year or two? seems like it would work if you didn't have to figure in traction or getting over the gate
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bobojim 3/29/2017 3:04pm
3/29/2017 3:04pm
Sidecar wrote:
How about locking the rear end to make it rigid for the start.... Look how fast a speedway bike comes out of the gate.
cable wrote:
didn't someone try rear holeshot device in the last year or two? seems like it would work if you didn't have to figure in traction or...
didn't someone try rear holeshot device in the last year or two? seems like it would work if you didn't have to figure in traction or getting over the gate
http://m.vitalmx.com/forums/Moto-Related,20/New-development-RE-holeshot…

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