Positive Traction Axel

Must be some kind of limited slip kind of deviceor else you wouldn't be able
to turn. Sounds $$$$.
"Jeff Grippe" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Hello everyone,

There are some trikes and quads on the market that have a positive
traction rear axel that supplies drive to both wheels.

Does anyone know where these can be purchased?

I have a trike that I'm thinking of building into a quad but only if I can
get one of these axels.

Thanks for any help.

Jeff

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I'm looking at this for a rear axel so turning isn't necessary.

Thanks,

Jeff
"bent_pilot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Must be some kind of limited slip kind of deviceor else you wouldn't be
able to turn. Sounds $$$$.
"Jeff Grippe" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Hello everyone,

There are some trikes and quads on the market that have a positive
traction rear axel that supplies drive to both wheels.

Does anyone know where these can be purchased?

I have a trike that I'm thinking of building into a quad but only if I
can get one of these axels.

Thanks for any help.

Jeff

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If the rear is the drive axle, you have to have a differential or you won't
be able to turn, because unlike in a race car with a posi rear, you don't
have the HP or torque to break rear wheel traction!

"Jeff Grippe" <jeff@door7> wrote in message
news:[email hidden]...

Quoted message said:

I'm looking at this for a rear axel so turning isn't necessary.

Thanks,

Jeff
"bent_pilot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Must be some kind of limited slip kind of deviceor else you wouldn't be
able to turn. Sounds $$$$.
"Jeff Grippe" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Hello everyone,

There are some trikes and quads on the market that have a positive
traction rear axel that supplies drive to both wheels.

Does anyone know where these can be purchased?

I have a trike that I'm thinking of building into a quad but only if I
can get one of these axels.

Thanks for any help.

Jeff

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News==----
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Newsgroups
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Jeff Grippe said:

Hello everyone,

There are some trikes and quads on the market that have a positive traction
rear axel that supplies drive to both wheels.

Does anyone know where these can be purchased?

I have a trike that I'm thinking of building into a quad but only if I can
get one of these axels.

It would be helpful to know where you saw these, but many
two-wheel-drive-rear axles are built by the manufacturer. You'll have
to talk directly to them.

"Positive traction" sometimes means that that power is supplied to both
rear wheels through independant freewheels instead of a differential.
This arrangement allows the outside wheel to turn faster than the
drivetrain when the vehicle is turning. This isn't a true
"positraction" differential, where power is distributed proportionally
to both wheels unless one wheel start slipping, at which point the
"posi" kicks in and allows the non-slipping wheel to power the vehicle.

Jeff

Jeff Grippe said:

There are some trikes and quads on the market that have a positive traction
rear axel that supplies drive to both wheels.

I don't see it on their website right now, but Lightfoot at least used
to offer it as an option on all their trikes. Maybe they still do.
Might be worth dropping them a line -
http://www.lightfootcycles.com/trikes.htm

"Jeff Wills" <[email hidden]> wrote in message

Quoted message said:

It would be helpful to know where you saw these, but many
two-wheel-drive-rear axles are built by the manufacturer. You'll have
to talk directly to them.

"Positive traction" sometimes means that that power is supplied to both
rear wheels through independant freewheels instead of a differential.
This arrangement allows the outside wheel to turn faster than the
drivetrain when the vehicle is turning.

This is exactly what I am looking for. The Mountain Quad from Crank It
(www.crank-it.com) and the Rhoades Car (I don't have the URL handy) both
have this feature. I have emailed both of them and neither has responded. I
assume that they didn't respond because I wasn't a potential buyer but I
don't actually know whey they didn't respond.

Thanks,

Jeff

Jeff Grippe said:

"Jeff Wills" <[email hidden]> wrote in message

Quoted message said:

It would be helpful to know where you saw these, but many
two-wheel-drive-rear axles are built by the manufacturer. You'll have
to talk directly to them.

"Positive traction" sometimes means that that power is supplied to both
rear wheels through independant freewheels instead of a differential.
This arrangement allows the outside wheel to turn faster than the
drivetrain when the vehicle is turning.

This is exactly what I am looking for. The Mountain Quad from Crank It
(www.crank-it.com) and the Rhoades Car (I don't have the URL handy) both
have this feature. I have emailed both of them and neither has responded. I
assume that they didn't respond because I wasn't a potential buyer but I
don't actually know whey they didn't respond.

Thanks,

Jeff

The Crank-It's rear axle uses dual freewheels to allow the outside
wheel to spin faster in a turn, as I said above. The Rhoades Car uses a
similar setup as far as I can tell, but their website is darn short on
details. Both systems are integral with their vehicle designs and
probably not available seperately.

You might also want to contact Worksman: http://www.worksman.com/ to
see if their rear axle is available seperately. I think they have
two-wheel-drive units, but I'm not certain.

Other Jeff

"Jeff Wills" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Jeff Grippe said:

"Jeff Wills" <[email hidden]> wrote in message

Quoted message said:

It would be helpful to know where you saw these, but many
two-wheel-drive-rear axles are built by the manufacturer. You'll have
to talk directly to them.

"Positive traction" sometimes means that that power is supplied to both
rear wheels through independant freewheels instead of a differential.
This arrangement allows the outside wheel to turn faster than the
drivetrain when the vehicle is turning.

This is exactly what I am looking for. The Mountain Quad from Crank It
(www.crank-it.com) and the Rhoades Car (I don't have the URL handy) both
have this feature. I have emailed both of them and neither has responded.
I
assume that they didn't respond because I wasn't a potential buyer but I
don't actually know whey they didn't respond.

Thanks,

Jeff

The Crank-It's rear axle uses dual freewheels to allow the outside
wheel to spin faster in a turn, as I said above. The Rhoades Car uses a
similar setup as far as I can tell, but their website is darn short on
details. Both systems are integral with their vehicle designs and
probably not available seperately.

You might also want to contact Worksman: http://www.worksman.com/ to
see if their rear axle is available seperately. I think they have
two-wheel-drive units, but I'm not certain.

Other Jeff

Do they mount the freewheels the same direction, or rebuild the left one so
it has reversed pawls?

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bent_pilot said:

Do they mount the freewheels the same direction, or rebuild the left one so
it has reversed pawls?

I would assume they're mounted in the "normal" orientation, or one side
uses an ACS "Southpaw" left-side freewheel. Reversing the pawls sounds
like a pretty hairy operation to me.

Jeff

Mountain Quad may be out of production
Their system works from 2 BMX freewheels inside the drive sprocket.
In bicycle land it is called "dominate drive"
In the car world it is a "Detroit locker"
Can be cheaply done by driving a "jack shaft" next to the rear axle and then 2
chains to right and left axle half, 1 BMX freewheel on each side. On the axle
or jack shaft, doesn't matter.
Make sense?
Speedy

Jeff Grippe said:

"Jeff Wills" <[email hidden]> wrote in message

Quoted message said:

It would be helpful to know where you saw these, but many
two-wheel-drive-rear axles are built by the manufacturer. You'll have
to talk directly to them.

"Positive traction" sometimes means that that power is supplied to both
rear wheels through independant freewheels instead of a differential.
This arrangement allows the outside wheel to turn faster than the
drivetrain when the vehicle is turning.

This is exactly what I am looking for. The Mountain Quad from Crank It
(www.crank-it.com) and the Rhoades Car (I don't have the URL handy) both
have this feature. I have emailed both of them and neither has responded. I
assume that they didn't respond because I wasn't a potential buyer but I
don't actually know whey they didn't respond.

Thanks,

Jeff

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"S. Delaire "Rotatorrecumbent"" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Mountain Quad may be out of production
Their system works from 2 BMX freewheels inside the drive sprocket.
In bicycle land it is called "dominate drive"
In the car world it is a "Detroit locker"
Can be cheaply done by driving a "jack shaft" next to the rear axle and
then 2
chains to right and left axle half, 1 BMX freewheel on each side. On the
axle
or jack shaft, doesn't matter.
Make sense?
Speedy

Sir Speedy,

Not quite but close. I think I need a vocabulary lesson. When someone says
"freewheel" I am thinking of a cluster of rings that are found on the rear
of a bicycle who specs are quoted as 12-19 or 14-32, etc. I beginning to
think that these things that are commonly called freewheels are not actually
the essence of what a freewheel is.

I also don't know what a "jack shaft" is.

Now having my ignorance I'll bet if you were to educate me a little further
I might be able to do this. Please tell me more if you please?

Mountain Quad out of production? Really? Why do you say that? I don't
imagine it is easy selling $8,000 bicycles no matter how interesting they
are.

Regards,

Jeff

PS this is posted to the group and CC'd to you so that you would see it. It
would probably be best to respond to the group. Many thanks.

Thank you for making that clearer.

So What I'm looking to build if I understand correctly is a freewheel with a
single cog on a jackshaft. This would allow power to be transmitted to one
or both wheels and also allow the wheels to turn independently for
cornering, etc.

This would then also allow me to "mid mount" some sort of tranmission (a
rohloff speedhub is what I'm thinking of) to provide gearing.

Does this sound correct?

Thanks again.

Jeff
"Jeff Wills" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Jeff Grippe said:

Sir Speedy,

Not quite but close. I think I need a vocabulary lesson. When someone
says
"freewheel" I am thinking of a cluster of rings that are found on the
rear
of a bicycle who specs are quoted as 12-19 or 14-32, etc. I beginning to
think that these things that are commonly called freewheels are not
actually
the essence of what a freewheel is.

A "freewheel" in bicycle terminology is anything that allows you to
turn the chain in one direction without turning the wheel. In this
case, we're talking about a unit with one cog that the chain runs on.
These are common on BMX bikes and single-speed mountain bikes. Over the
years, there have been "freewheels" with 1, 2, 3, 4, 5, 6, 7, or 8
cogs, but they all work in essentially the same fashion.

Quoted message said:

I also don't know what a "jack shaft" is.

In terms of what we're talking about, a jackshaft has sprockets at both
ends, which allows you to transmit power to one side or the other of a
chain.

Other Jeff

Jeff Grippe said:

Thank you for making that clearer.

So What I'm looking to build if I understand correctly is a freewheel with a
single cog on a jackshaft. This would allow power to be transmitted to one
or both wheels and also allow the wheels to turn independently for
cornering, etc.

This would then also allow me to "mid mount" some sort of tranmission (a
rohloff speedhub is what I'm thinking of) to provide gearing.

Does this sound correct?

Thanks again.

Jeff

Yes. This is the arrangement used by the Crank-It, I believe.

Other Jeff

As soon as you start turning, it's quite likely, even at low speeds, that
the inside wheel will be unweighted enough that turning will be no problem,
poitrac or not.

"bent_pilot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

If the rear is the drive axle, you have to have a differential or you

won't

Quoted message said:

be able to turn, because unlike in a race car with a posi rear, you don't
have the HP or torque to break rear wheel traction!

"Jeff Grippe" <jeff@door7> wrote in message
news:[email hidden]...

Quoted message said:

I'm looking at this for a rear axel so turning isn't necessary.

Thanks,

Jeff
"bent_pilot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Must be some kind of limited slip kind of deviceor else you wouldn't be
able to turn. Sounds $$$$.
"Jeff Grippe" <[email hidden]> wrote in message
news:[email hidden]...
> Hello everyone,
>
> There are some trikes and quads on the market that have a positive
> traction rear axel that supplies drive to both wheels.
>
> Does anyone know where these can be purchased?
>
> I have a trike that I'm thinking of building into a quad but only if I
> can get one of these axels.
>
> Thanks for any help.
>
> Jeff

=---