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Question on fishtailing


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#1 Dennis Krivacek

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Posted 13 September 2016 - 11:23 PM

OK boys, what makes some F1's fishtail coming out of the high bank on a king track?  Despite trying different tire compounds and upon advice,  different size tires, the problem persists. This is occurring with several types of F1 builds. Any suggestions?






#2 Ramcatlarry

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Posted 13 September 2016 - 11:27 PM

Retro inline F1 and all inline cars have torque steer accelerating AND decelerating.  Lighter the car, the worse it is.


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#3 bbr

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Posted 13 September 2016 - 11:46 PM

coming off the bank the chassis unloads, it also doesn't help that the track has to start to bank the other way for the deadman.

some chassis design behaves better that others, where it unloads at a rate that doesn't fishtail that bad


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#4 slotcarone

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Posted 14 September 2016 - 05:54 AM

This can also be affected by the guide height adjustment. :D


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#5 John Streisguth

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Posted 14 September 2016 - 06:45 AM

Does it actually fishtail or do a "death wobble"?


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#6 tonyp

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Posted 14 September 2016 - 07:38 AM

Try setting the fronts so they don't touch as hard.
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#7 Dennis Krivacek

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Posted 14 September 2016 - 08:34 AM

Thanks for the suggestions!
 



#8 The Number of

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Posted 14 September 2016 - 09:12 AM

Use a really slow motor I have extras if you need any. :)
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#9 Uncle Fred

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Posted 14 September 2016 - 09:53 AM

Try rounding the inner edge of the tires more.


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#10 Matt Sheldon

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Posted 14 September 2016 - 09:56 AM

I like Mike and Tony's suggestions, both go hand in hand and are similar.


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#11 Racer36

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Posted 14 September 2016 - 10:56 AM

I figure if you keep your F1 off the floor you are doing quite well.
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#12 penske

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Posted 14 September 2016 - 12:21 PM

Dennis.  Have you tested using a different F1 body style ?   There are many different styles available  today.

 

You can also try moving the body back on the chassis a bit.  Might increase down force at the rear end.

Roger


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#13 tonyp

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Posted 14 September 2016 - 02:02 PM

No one asked what body is being used or I missed that.
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#14 Dominator

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Posted 14 September 2016 - 04:05 PM

Make sure your fronts are getting some grip. Try cleaning with light fluid or scuff them with the tire grinder.

For bodies, I would suggest using the outsight or Chicagoland M7. If the chassis doesn't work with that body you know it's not the body. Also make sure the interior is not hanging up on the lead wires or chassis.
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#15 Dennis Krivacek

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Posted 14 September 2016 - 08:38 PM

Body was a Parma Mantra


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#16 Dominator

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Posted 14 September 2016 - 08:45 PM

The Mantra is not a bad body IMO on a high bank, stuck King. If the track is loose the body does not have as much down force as the M7.

A motor is only as fast as the chassis it's in.
 
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#17 Noose

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Posted 15 September 2016 - 06:20 AM

Uh..you do mean Matra I assume.


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#18 Tim Neja

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Posted 15 September 2016 - 07:53 PM

Perhaps chanting a "Mantra" will help coming out of the bank!!! Like ----"Grip it Grip it Grip it!!!"   :laugh2:  :victory:


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#19 Dominator

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Posted 15 September 2016 - 08:43 PM

Oops, auto correct lol
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#20 LindsayB

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Posted 15 September 2016 - 10:00 PM

with everything else being equal - traction/tyres etc - you may need to run a higher gear ratio to kill the speed, 1 less tooth on the pinion. Cant make much speed if your backing off to stop the wobble.


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#21 NSwanberg

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Posted 16 September 2016 - 01:33 AM

Nothing is worth a de-slot, nothing is worth a de-slot.....hohmmmmm..... Nothing is worth a de-slot...............

 

Isn't this the Parma mantra?


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#22 swodem

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Posted 04 November 2016 - 04:03 PM

with everything else being equal - traction/tyres etc - you may need to run a higher gear ratio to kill the speed, 1 less tooth on the pinion. Cant make much speed if your backing off to stop the wobble.

 

That would be a lower gear ratio



#23 smichslot

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Posted 04 November 2016 - 05:48 PM

Well,

 

30 divided by 6 is a higher number that 30 divided by 7.

Which one is the higher ratio?

 

Steen


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#24 DE38

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Posted 04 November 2016 - 06:09 PM

The way I have always understood it was the numerically higher ratio (30 divided by 6,5.00) is actually the lower gear ratio, and the other(30 divided by 7,4.28) lower numerically but higher ratio.


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#25 Ralph Thorne

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Posted 04 November 2016 - 06:24 PM

The way I have always understood it was the numerically higher ratio (30 divided by 6,5.00) is actually the lower gear ratio, and the other(30 divided by 7,4.28) lower numerically but higher ratio.


That is correct.
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