2wd

Lone Rider · 12-21-2007, 03:02 PM

Is Ural the only choice for 2WD?

JohnBG · 12-21-2007, 03:06 PM

Quote:

Originally Posted by Lone Rider

Is Ural the only choice for 2WD?

Pretty much, yes.

There is a similar model called Denper made in the Ukraine that has 2WD, but the factory is closed and they are not making new bikes anymore. Hasn't for a few years.

You could always take an old Ural or Dnepr and pop in a early 80's BMW R airhead engine. It does require some modidfcation to the Ural/Dnepr transmission.

DustyJacket · 12-21-2007, 03:06 PM

No, there are some custom shops putting out 2WD.

JohnBG · 12-21-2007, 03:09 PM

Quote:

Originally Posted by DustyJacket

No, there are some custom shops putting out 2WD.

Sorry. I thought he was referring to rigs that were already manufactured with 2WD, stock from the factory. My bad.

I supose anything is possible in a custom shop.

ReCycled · 12-22-2007, 05:47 AM

If you're gonna go custom, why not go for threed wheel drive?

http://www.2wd.nl/

larryboy · 12-22-2007, 09:01 AM

I woke up this morning thinking of a way to build my own 2wd rig that can go faster than 55 MPH and here is this thread.

zenben · 12-22-2007, 11:20 PM

The R75 derivitave design of the Ural dates to the late 1930's.
Hardly modern, but probably durable. Without a limited slip, there is no use for it unless used on very loose surfaces.
I'll admit to never driving one, (soon to be remedied), but with 70 years of technological development to harvest, there surely must be a better way.

AceRph · 12-23-2007, 03:01 AM

MOBEC Duo Drive

MOBEC Super Drive

This system has a reverse. The rear wheel is attached to and suspended from the sidecar frame.

Their website says a lot of other stuff. I can't read German.

http://www.mobec.de

gyroforce · 12-23-2007, 01:06 PM

Quote:

Originally Posted by AceRph

Their website says a lot of other stuff. I can't read German.

http://www.mobec-international.com/index.php

larryboy · 12-23-2007, 01:36 PM

Wow.

That is some nice stuff!! Seems overly complicated, but nicely done.

I think I'd go with a left side hack for a BMW and go with a small gear reduction electric motor for reverse if I was building my own.

KCDakar · 12-23-2007, 02:11 PM

Quote:

Originally Posted by larryboy

I think I'd go with a left side hack for a BMW and go with a small gear reduction electric motor for reverse if I was building my own.

Why Left side?

Lone Rider · 12-23-2007, 03:49 PM

Quote:

Originally Posted by larryboy

Wow.

That is some nice stuff!! Seems overly complicated, but nicely done.

I think I'd go with a left side hack for a BMW and go with a small gear reduction electric motor for reverse if I was building my own.

I think their setup cost is about 6 KLRs, no sht.

Wouldn't take long to burn up an elec motor in some knarly stuff, but I don't know sht about that.

Left side?

Frank Warner · 12-23-2007, 05:12 PM

Quote:

Originally Posted by Lone Rider

Wouldn't take long to burn up an elec motor in some knarly stuff, but I don't know sht about that.

Think you'd want a temperature sensor on the motor .. going back to the motor controller.. Even then the electric motor needs to be speed limited ... (you can get electric clutches .. so that can dissconect the eletric motor .. still leaves you with a reverse that way.)

Anyone know about using hydraulic motors ? I know the seals blow if the wheel stalls (stops) ... any other design considerations?

-------
Left side is required in Australia for one. On the Isle of Man they get away with a right chair despite them driving on the left...

=========================
Other 2WD chairs .. go back to WW2 and bm made one .. possibly some others (Jawa?) too .. but my memory lets me down at the moment.

AceRph · 12-23-2007, 05:22 PM

Quote:

Originally Posted by gyroforce

http://www.mobec-international.com/index.php

I can read that!

Lone Rider · 12-23-2007, 05:23 PM

Quote:

Originally Posted by Frank Warner

Think you'd want a temperature sensor on the motor .. going back to the motor controller.. Even then the electric motor needs to be speed limited ... (you can get electric clutches .. so that can dissconect the eletric motor .. still leaves you with a reverse that way.)

Anyone know about using hydraulic motors ? I know the seals blow if the wheel stalls (stops) ... any other design considerations?

-------
Left side is required in Australia for one. On the Isle of Man they get away with a right chair despite them driving on the left...

The temp sensor switched/controlled Warn winches used on our Mil vehicles blows rotten goat balls. You really, really don't want this kinda setup.

Hydraulics might be applicable for long-use winch operation, but not for practical vehicle drive. There's already a powerful gas motor on the rig. It just needs a reverse gear.

12-21-2007, 03:02 PM	#1
Lone Rider ^OP Registered User Joined: Jan 2002 Location: out and about Oddometer: 25,006	2wd Is Ural the only choice for 2WD?

12-21-2007, 03:06 PM	#3
DustyJacket Gnarly Adventurer Joined: Aug 2007 Location: Missouri Oddometer: 290	No, there are some custom shops putting out 2WD. __________________ IBA #28412 Bill & Pete Slay the Dragon - http://www.dustyjacket.com/dragon/index.html My web page : http://www.dustyjacket.com/mc/

12-22-2007, 05:47 AM	#5
ReCycled Gnarly Adventurer Joined: Oct 2005 Location: Vally Forge, PA Oddometer: 373	how 'bout 3wd? If you're gonna go custom, why not go for threed wheel drive? http://www.2wd.nl/

12-23-2007, 03:01 AM	#8
AceRph Stossel for POTUS Joined: Jan 2003 Location: Where the stupidest people on earth run things Oddometer: 23,764	MOBEC Duo Drive MOBEC Super Drive This system has a reverse. The rear wheel is attached to and suspended from the sidecar frame. Their website says a lot of other stuff. I can't read German. http://www.mobec.de __________________ Equal to all of you of roads and good luck! - krokodil al-kashi “We are turning into a nation of whimpering slaves to Fear—fear of war, fear of poverty, fear of random terrorism, fear of getting down-sized or fired because of the plunging economy, fear of getting evicted for bad debts or suddenly getting locked up in a military detention camp on vague charges of being a Terrorist sympathizer.” —”Extreme Behavior in Aspen,” February 3, 2003

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12-22-2007, 09:01 AM	#6
larryboy Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,868	I woke up this morning thinking of a way to build my own 2wd rig that can go faster than 55 MPH and here is this thread.

12-22-2007, 11:20 PM	#7
zenben all roads are one Joined: Feb 2007 Location: Portland Oregon Oddometer: 593	The R75 derivitave design of the Ural dates to the late 1930's. Hardly modern, but probably durable. Without a limited slip, there is no use for it unless used on very loose surfaces. I'll admit to never driving one, (soon to be remedied), but with 70 years of technological development to harvest, there surely must be a better way.

12-23-2007, 01:36 PM	#10
larryboy Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,868	Wow. That is some nice stuff!! Seems overly complicated, but nicely done. I think I'd go with a left side hack for a BMW and go with a small gear reduction electric motor for reverse if I was building my own.