Posted: Sun Jun 20, 2004 10:39 am
Hello again..!
The interest & f/b is great! 'uninformed' is spot-on with the axle info:
Kirkstall Forge Engineering were indeed the Leeds-based company who did do some casting work for Roadless Traction on this project; this would
appear to be in the banjo & swivel housing areas at least; more than that, we know little as time erodes memories & people pass on...
Kirkstalls were initially swallowed by GKN (who themselves are of course part of Dana Corp. now)
The rear axles are as 'complete' a looking assembly as you'd expect to find on any non-steering axle........The front however is clearly modified
where widened, & braced to add strength, in much the same way that the GMC units were shortened for tractor application. (Gas torch & welder.!!)
Bill, like you, I too have often wondered why Roadless did'nt use the
land rover diff at least.....but I think that the reason for this was that
it was felt that they may not handlle the torque generated by having planetaries & big wheels on the ends....The gearing down (..if I understand
the system correctly..?) halves the load on engine & transmission, plus the top speed (from 70 mph to 35 mph) but doubles the torque ...or something like that...??? (basically, as a driver, all I know is it lets a
bog-standard 2&1/4l. turn tall tyres effortlessly......it accelerates fast until
it runs out of cogs & revs...)
Having owned a Holden 186S (Monaro engine) Series 1 when living in NZ in the early '80's, this little truck could squeak its tyres.....usually just before de-splining its halfshafts or collapsing the pinion carrier, I learnt about the strength of the late-'50s-early '60s materials the expensive way,
but I don't think the two pinion centres would have stood up to the power-to-overrun torques that you can feel run right back onto the engine when deccelerating....at least not for very long anyway!
Stability....well, yes, driven carefully, they are reasonably stable even on sideslopes, but the narrower rear track means that one wheel will always choose the path of least resistance, & follow in the rut of a front one, so they will 'crab' horribly in certain conditions...& on a hillside, this will mean that with the physics involved (lower side wheel carries more weight) the rear always follows that lower front wheel. This puts the 'crab' across the slope (drawing the rear downwards) & slightly favouring the upperwards front wheel with an 'up-hill' angle...
As with any open diff....that uphill front wheel (with less weight) is the one that gets 50% of the torque, right..? With tall wheels, that can mean
unpredictable handling.....one could imagine it clipping a carefully-nurtured Forestry Comission tree root, drawing the steering sharply uphill
& next thing, arse-over-head you go as the rear digs in..
(Our one has been over on its side many years ago...much to my father's embarrassment....no damage that was'nt put right with a block of wood & a sledgehammer...... ....but I don't think any of the above theory was involved on that occasion..!!!)
Diff locks & keeping axles same width go a long way to improving the
handling of other makes...Unimogs don't suffer from this & their CofG is higher than the Roadless by about 4-6".
Contrary to whats written, the difference in track widths is not for making
wheels make their own tracks....its to give the front end some steering lock...the footwells on the bulkhead are also shaved, with the result that the accelerator pedal is moved in more towards the brake, & the brake pedal has its pad rewelded offset to standard...so its closer to the clutch.
As for other handling traits.....if the brakes are kept in good fettle, it is possible to lock all 4 wheels below about 5-6 mph, otherwise, they are a bit 'vague' to say the least....they will slow it reasonably, but it pays to use the engine & gearing to do the work.
It strolls across ditches that would trap a standard 16" wheel, but can also
climb a good step if traction permits.
Where it scored here in the Falklands was back in the '60's when people started using more mechanised transport ( that was'nt a tractor or Bren-Gun Carrier or even a horse..!!) in the un-roaded 'Camp' rural area; we had a 65 mile overland journey to Stanley (the town) & especially in wintertime, folk with
standard wheeled Land Rovers would actually wait a few days before making the journey from further-outlying farms just in order to travel in convoy with it.
Of course it was way ahead of its time...& twice the price of a Regular88"
....so by the time other farmers felt that they should get similar trucks, the production of axles had ceased, & the last remaining vehicle(s) had been sold.....we still have letters on file from Ven Dodge of R/T to my father offering farmers first dibs at them.....
(An alternative type aquired by the Falkland Islands Trading Co at around the same time was a pair of 109" Station Wagons, with 1-Ton
chassis lifts & 900x16 wheels....one of these was owned for along time by
my uncle on a neighbouring property, & am pleased to say that we did eventually manage to aquire it for the collection (swapped it for a heap of
old Honda trikes we'd ceased using...such is the way trade goes..)
As a vehicle to ride in, generally, it was comfortable, stable on all main tracks, fast, & could carry a good load as well.
Its work reduced when my father got his PPL & flew a 172 for about 20
years (this with the back seat out & 1/4 tanks) would carry as much as a
SWB L/R & did the journey in 20 minutes, & 1/6th of the fuel.....
But we still used it around the property, for fence maintenance & other work until about the time I built a swamp-crawler Forward-Control out of the 3 that had come to the islands over the years, & which could carry awesome loads in comparison; since then it has become something of an heirloom that we promise ourselves we'll restore one day...
(Its actually done well...it even got to South Georgia on its delivery down here....It was deck cargo on a Danish ship that had to go there first to unload supplies, & was actually offloaded so's they could get in the hatch)
btw, going back to the conflict in '82, what seems to be the confusing issue over vehicles comandeered by the Argentines is that we had a SWB
L/R in a shed at Stanley airport for use as a tender for the aircraft, & the
buggers got that fairly early on on April 2nd.....
(...Tough as old boots that little Landie, it was already ex-MOD, a'61 IIA
all they managed to do was knock the exhaust off & paint it Galtieri green
but it used to get around with up to 14 of them crammed in it....till the last day & they bogged it during the surrender..! Then our Bomb Disposal guys give it hell for a while till their kit got here, & after a few others aborted attempts to do things with it, it was brought out to the farm & I rebuilt it in 1985....and still have it.. It was used in a factory ad campaign some years ago, which was a fitting salute to its construction all those years ago...)
I'd better stop waffling here...you fellers must be asleep & I'm burning bandwidth...
....Oh, & we do have a metalled road now after a long time...& after running one of the best Land Rovers ever built; a V8 101" (on huge
tractor grips) for past 8 years, have sacreligeously gone 'half-Yank' & we now have a '91 Dodge 50 Reynolds-Boughton 4x4 dualcab with a Perkins 1004T engine ........which is a real beast & great fun..
The interest & f/b is great! 'uninformed' is spot-on with the axle info:
Kirkstall Forge Engineering were indeed the Leeds-based company who did do some casting work for Roadless Traction on this project; this would
appear to be in the banjo & swivel housing areas at least; more than that, we know little as time erodes memories & people pass on...
Kirkstalls were initially swallowed by GKN (who themselves are of course part of Dana Corp. now)
The rear axles are as 'complete' a looking assembly as you'd expect to find on any non-steering axle........The front however is clearly modified
where widened, & braced to add strength, in much the same way that the GMC units were shortened for tractor application. (Gas torch & welder.!!)
Bill, like you, I too have often wondered why Roadless did'nt use the
land rover diff at least.....but I think that the reason for this was that
it was felt that they may not handlle the torque generated by having planetaries & big wheels on the ends....The gearing down (..if I understand
the system correctly..?) halves the load on engine & transmission, plus the top speed (from 70 mph to 35 mph) but doubles the torque ...or something like that...??? (basically, as a driver, all I know is it lets a
bog-standard 2&1/4l. turn tall tyres effortlessly......it accelerates fast until
it runs out of cogs & revs...)
Having owned a Holden 186S (Monaro engine) Series 1 when living in NZ in the early '80's, this little truck could squeak its tyres.....usually just before de-splining its halfshafts or collapsing the pinion carrier, I learnt about the strength of the late-'50s-early '60s materials the expensive way,
but I don't think the two pinion centres would have stood up to the power-to-overrun torques that you can feel run right back onto the engine when deccelerating....at least not for very long anyway!
Stability....well, yes, driven carefully, they are reasonably stable even on sideslopes, but the narrower rear track means that one wheel will always choose the path of least resistance, & follow in the rut of a front one, so they will 'crab' horribly in certain conditions...& on a hillside, this will mean that with the physics involved (lower side wheel carries more weight) the rear always follows that lower front wheel. This puts the 'crab' across the slope (drawing the rear downwards) & slightly favouring the upperwards front wheel with an 'up-hill' angle...
As with any open diff....that uphill front wheel (with less weight) is the one that gets 50% of the torque, right..? With tall wheels, that can mean
unpredictable handling.....one could imagine it clipping a carefully-nurtured Forestry Comission tree root, drawing the steering sharply uphill
& next thing, arse-over-head you go as the rear digs in..
(Our one has been over on its side many years ago...much to my father's embarrassment....no damage that was'nt put right with a block of wood & a sledgehammer...... ....but I don't think any of the above theory was involved on that occasion..!!!)
Diff locks & keeping axles same width go a long way to improving the
handling of other makes...Unimogs don't suffer from this & their CofG is higher than the Roadless by about 4-6".
Contrary to whats written, the difference in track widths is not for making
wheels make their own tracks....its to give the front end some steering lock...the footwells on the bulkhead are also shaved, with the result that the accelerator pedal is moved in more towards the brake, & the brake pedal has its pad rewelded offset to standard...so its closer to the clutch.
As for other handling traits.....if the brakes are kept in good fettle, it is possible to lock all 4 wheels below about 5-6 mph, otherwise, they are a bit 'vague' to say the least....they will slow it reasonably, but it pays to use the engine & gearing to do the work.
It strolls across ditches that would trap a standard 16" wheel, but can also
climb a good step if traction permits.
Where it scored here in the Falklands was back in the '60's when people started using more mechanised transport ( that was'nt a tractor or Bren-Gun Carrier or even a horse..!!) in the un-roaded 'Camp' rural area; we had a 65 mile overland journey to Stanley (the town) & especially in wintertime, folk with
standard wheeled Land Rovers would actually wait a few days before making the journey from further-outlying farms just in order to travel in convoy with it.
Of course it was way ahead of its time...& twice the price of a Regular88"
....so by the time other farmers felt that they should get similar trucks, the production of axles had ceased, & the last remaining vehicle(s) had been sold.....we still have letters on file from Ven Dodge of R/T to my father offering farmers first dibs at them.....
(An alternative type aquired by the Falkland Islands Trading Co at around the same time was a pair of 109" Station Wagons, with 1-Ton
chassis lifts & 900x16 wheels....one of these was owned for along time by
my uncle on a neighbouring property, & am pleased to say that we did eventually manage to aquire it for the collection (swapped it for a heap of
old Honda trikes we'd ceased using...such is the way trade goes..)
As a vehicle to ride in, generally, it was comfortable, stable on all main tracks, fast, & could carry a good load as well.
Its work reduced when my father got his PPL & flew a 172 for about 20
years (this with the back seat out & 1/4 tanks) would carry as much as a
SWB L/R & did the journey in 20 minutes, & 1/6th of the fuel.....
But we still used it around the property, for fence maintenance & other work until about the time I built a swamp-crawler Forward-Control out of the 3 that had come to the islands over the years, & which could carry awesome loads in comparison; since then it has become something of an heirloom that we promise ourselves we'll restore one day...
(Its actually done well...it even got to South Georgia on its delivery down here....It was deck cargo on a Danish ship that had to go there first to unload supplies, & was actually offloaded so's they could get in the hatch)
btw, going back to the conflict in '82, what seems to be the confusing issue over vehicles comandeered by the Argentines is that we had a SWB
L/R in a shed at Stanley airport for use as a tender for the aircraft, & the
buggers got that fairly early on on April 2nd.....
(...Tough as old boots that little Landie, it was already ex-MOD, a'61 IIA
all they managed to do was knock the exhaust off & paint it Galtieri green
but it used to get around with up to 14 of them crammed in it....till the last day & they bogged it during the surrender..! Then our Bomb Disposal guys give it hell for a while till their kit got here, & after a few others aborted attempts to do things with it, it was brought out to the farm & I rebuilt it in 1985....and still have it.. It was used in a factory ad campaign some years ago, which was a fitting salute to its construction all those years ago...)
I'd better stop waffling here...you fellers must be asleep & I'm burning bandwidth...
....Oh, & we do have a metalled road now after a long time...& after running one of the best Land Rovers ever built; a V8 101" (on huge
tractor grips) for past 8 years, have sacreligeously gone 'half-Yank' & we now have a '91 Dodge 50 Reynolds-Boughton 4x4 dualcab with a Perkins 1004T engine ........which is a real beast & great fun..