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#Post#: 12209--------------------------------------------------
Limited Slip Hub Development.
By: jon.pearce Date: December 30, 2024, 12:43 pm
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Hi All,
I have been designing a stand alone, rear wheel mounting hub,
that has a limited slip feature built in.
In straight line running, the hub has enough friction to still
be driven, but cornering forces allow the friction to be reduced
and provide an amount of limited slip.
Has anyone else played with this type of arrangement ?
Happy New Year.
Jon
#Post#: 12210--------------------------------------------------
Re: Limited Slip Hub Development.
By: StefanN Date: December 30, 2024, 6:42 pm
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Yes there has been some experimentation:
HTML https://cyclekartsgb.createaforum.com/tech-forum/limited-slip-freewheel/msg2696/#msg2696
Don’t think anyone other than Adrian built one.
#Post#: 12211--------------------------------------------------
Re: Limited Slip Hub Development.
By: jon.pearce Date: December 31, 2024, 2:38 am
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Thanks Stefan,
Is Adrian still an active member on the Forum?
I cant seem to pm him.
Jon
#Post#: 12212--------------------------------------------------
Re: Limited Slip Hub Development.
By: RhysN Date: December 31, 2024, 3:21 am
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I built this arrangement and told Adrian about it. That was over
20 years before Adrian took it up and complicated it. The reason
I did it initially (about 1995) was that my, then 5 year old
son) had a go kart that understeered like a pig. I made the hub
and the problem disappeared. Over time we tightened the unit so
that he could play on our grass field without getting stuck when
one wheel would spin. On the front driveway we loosened it off a
little.
It works, does not need the complication that Adrian introduced
(nor the sophisticated and costly materials) if anyone is
interested I am more than happy to share the drawings, total
cost about £5 to make them. FWIW the Napier is being fitted with
one as we discuss this.
#Post#: 12215--------------------------------------------------
Re: Limited Slip Hub Development.
By: jon.pearce Date: December 31, 2024, 7:33 am
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Would be interested to see your drawings and materials list.
My email:
jdpearce333@gmail.com
#Post#: 12217--------------------------------------------------
Re: Limited Slip Hub Development.
By: RhysN Date: December 31, 2024, 10:25 am
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[quote author=Jon Pearce link=topic=1628.msg12215#msg12215
date=1735651985]
Would be interested to see your drawings and materials list.
My email:
jdpearce333@gmail.com
[/quote]
As well as that I'll post here again. I did post a very long
time ago, but can't find it. I'll also send to you Jon, It's a
"back of an envelope" sketch.
Materials needed
1 disc of 2 or 3mm steel that is similar to that mounting a hub
to wheel, you may need another mounted to your hub depending how
you have done that, as there are so many variations there I'll
let you figure that.
1 Disc of PTFE type material, get some spare for when it wears,
ours lasted a year with very frequent use, almost every day.
1 coil spring, I use an old valve spring, it can be quite soft.
1 keyed shaft collar similar to
HTML https://www.wdscomponents.com/en-gb/set-collar-with-keyway
1 split collar
Method is to weld one disc to the keyed shaft collar and install
on the axle with a longish key. The spring has been installed
prior, and the split collar is used to adjust the level of
friction.
Friction disc can be free floating.
At the outboard end of the axle drill and tap the axle, use a
large washer (knock off?) and bolt firmly, use thread lock. If
it's on the LH side the unit is trying to undo itself.
#Post#: 12218--------------------------------------------------
Re: Limited Slip Hub Development.
By: jim Date: January 1, 2025, 1:53 am
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There are some of Adrian's Excellent drawings that show his
designs very clearly. See Stefans Link. Adrian is a very clever
bloke and came up with some really good Cyclekart ideas. I do
miss his mad chats and porkpie eating skills when we were away
staying in hotels or camping at various CKGB events.
#Post#: 12219--------------------------------------------------
Re: Limited Slip Hub Development.
By: RhysN Date: January 1, 2025, 2:04 am
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[quote author=jim link=topic=1628.msg12218#msg12218
date=1735717990]
There are some of Adrian's Excellent drawings that show his
designs very clearly. See Stefans Link. Adrian is a very clever
bloke and came up with some really good Cyclekart ideas. I do
miss his mad chats and porkpie eating skills when we were away
staying in hotels or camping at various CKGB events.
[/quote]
He was very good with his drawing skills, previous life as a
technical illustrator certainly helped there.
I will say that while Adrian's unit was an exotic development,
it didn't seem to work and better, and knowing what he spent (a
few zeros at the end of the price) I personally could not
justify spending what he did.
#Post#: 12220--------------------------------------------------
Re: Limited Slip Hub Development.
By: jon.pearce Date: January 1, 2025, 2:46 am
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The design is remarkably similar to mine, except that I am using
a Belville Washer stack in place of the spring.
#Post#: 12223--------------------------------------------------
Re: Limited Slip Hub Development.
By: Jimr1999 Date: January 1, 2025, 8:16 am
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Is there something else retaining the wheel if the bolt in the
end of the shaft unwinds? Can't fathom that from the drawing?
JimR
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