look what a standard G can do...

20 replies [Last post]
shakir
shakir's picture
Offline
Joined: 19.11.2003
Location: LONDON
GWOA Groups: Members

standard V8 rock crawling

not even proper tyres, not even lifted, amazing

G Spot
G Spot's picture
Offline
Joined: 28.02.2007
Location: Sydney,Australia.
Re: look what a standard G can do...

I knew there was a reason I wanted a G,to climb rocks and to use my G as toboggan in the snow...
http://www.youtube.com/watch?v=D4uBFeiAqi4&NR=1

G Spot
G Spot's picture
Offline
Joined: 28.02.2007
Location: Sydney,Australia.
Re: look what a standard G can do...

A standard G did this during testing:

http://www.youtube.com/watch?v=gnM58kHvLxc

tclynes
tclynes's picture
Offline
Joined: 14.08.2005
Location: Bucks/West Yorkshire
GWOA Groups: Members
Re: look what a standard G can do...

did anyone notice the guy in that second video driving, im sure i saw a crash helmet!

draxey
draxey's picture
Offline
Joined: 13.07.2004
Re: look what a standard G can do...

That proves the theory that if you drift on a slippery surface with a full time 4wd G wagen some of the wheels spin backwards which is pretty cool 8)

mgrays
mgrays's picture
Offline
Joined: 08.11.2005
Location: Aberdeen Scotland
GWOA Groups: Members
Re: look what a standard G can do...

V8 rock climbing in Thailand.. hum.. I think his rear tyre and rim are trashed as he drives up over edge at the end.

marcus
marcus's picture
Offline
Joined: 02.05.2004
Location: Co. Antrim, N. Ireland
GWOA Groups: Members
Re: look what a standard G can do...

Er,
Draxy,
The same thing used to APPEAR to happen to the wagOn wheels in the old western films, it's a common optical illusion.
Cheers
Marcus
Mind you once apon a time I went through a set of ped lights in Belfast, and the rear wheels were turning backwards, as I was in reverse, ah the joys of youth and rear wheel drive.

draxey
draxey's picture
Offline
Joined: 13.07.2004
Re: look what a standard G can do...

I knew someone would say that, It is not an illusion they really do spin backwards when all 4 wheels lose grip

Maxwell Smart
Maxwell Smart's picture
Offline
Joined: 05.11.2003
Location: London
Re: look what a standard G can do...

mgrays wrote:
V8 rock climbing in Thailand.. hum.. I think his rear tyre and rim are trashed as he drives up over edge at the end.

Rock crawling in Texas. Thai is the username of a US forum user.

draxey wrote:
I knew someone would say that, It is not an illusion they
really do spin backwards when all 4 wheels lose grip

Um no - there is still drive to the wheels. Just no traction, so the wheels are still spinning forward. Or are you joking... can never tell with the written word...

draxey
draxey's picture
Offline
Joined: 13.07.2004
Re: look what a standard G can do...

I think Howard or someone was saying about this theory ages ago that when all four wheels lose grip and one becomes unloaded the diff makes it spin backwards, or maybe I dreamt that :D

tclynes
tclynes's picture
Offline
Joined: 14.08.2005
Location: Bucks/West Yorkshire
GWOA Groups: Members
Re: look what a standard G can do...

could be a camera illusion, look at the wheel in this video ...

http://www.evo.co.uk/videos/trackdayvideos/208577/road_and_track_2007.html

mark
mark's picture
Offline
Joined: 06.11.2003
Location: England
GWOA Groups: Committee, Members
Re: look what a standard G can do...

Seems reasonable that a wheel will go backwards, no traction at all,, one wheel spins forward, the other will go backwards. If you lift the drive wheels off the ground, spin one wheel, and the other wheel will go in the opposite direction.

The Beemer's wheels is an illusion though :D

marcus
marcus's picture
Offline
Joined: 02.05.2004
Location: Co. Antrim, N. Ireland
GWOA Groups: Members
Re: look what a standard G can do...

Yes Draxy I was aware that if the drive shaft is not rotating or rotating slower than a wheel is being externally turned thart this will cause the other wheel to rotate backwards, I used to build working differentials out of mechanno, and gosh even observed it when both wheels on axle stands etc.,no big deal.
This would however require the engine to be stalled ( most likely assuming a gearbox), or at least the rotation of the drive shaft to be stopped and held, or rotating very slowly, AND that the wheel that was getting traction was getting sufficient traction to overcome the internal resistence of the diff AND also the marginal traction of the wheel that was apparently spinning backwards, possible but highly improbable as my mother used to say.
Or is it something that occurs through the centre diff ?, it starts to get copmplicated, and my nuron starts to get tired.
I stand to be corrected.
Cheers
Marcus

Maxwell Smart
Maxwell Smart's picture
Offline
Joined: 05.11.2003
Location: London
Re: look what a standard G can do...

Phew... now that Marcus has gone through the explanation I do seem to recall seeing a demonstration about this so stand corrected.

But in this particular case from what Marcus says it does sound more like an optical illusion??

Also I presume that this would only be the case if no diffs were locked?

Maxwell Smart
Maxwell Smart's picture
Offline
Joined: 05.11.2003
Location: London
Re: look what a standard G can do...

Ok I have just looked at this video again and I think the wheels are spinning backwards. You can actually see them stop and reverse. Also if you look at the snow being spun off the wheels it switches directions and then is going forward.

marcus
marcus's picture
Offline
Joined: 02.05.2004
Location: Co. Antrim, N. Ireland
GWOA Groups: Members
Re: look what a standard G can do...

Sorry, :roll:

watch the video, :shock:

my ould Da allowed that one should never allow facts to interfere with a good argument, and of course yer man, the driver, could have stuffed her into reverse briefly etc etc

I did watch it and could not reach any definate conclusions

Cheers

Marcus

draxey
draxey's picture
Offline
Joined: 13.07.2004
Re: look what a standard G can do...

I have stirred up a good debate here :D , can't remember who was saying about this subject a year or so back but was someone I usually pay attention to with technical issues. I will have to try this next time it snows!!

G Spot
G Spot's picture
Offline
Joined: 28.02.2007
Location: Sydney,Australia.
Re: look what a standard G can do...

Did anyone notice in the same video that while that rear wheel was spining backwards that the steering wheel was also at the same time spining backwards ? :lol:

peter perfect
peter perfect's picture
Offline
Joined: 08.11.2003
Location: Bahrain
GWOA Groups: Members
Re: look what a standard G can do...

Mmm not convinced, when wheels spin which is what these are doing you do get an illusion, any how I reckon he had diff locks in so no way would they go bac-ards

Maxwell Smart
Maxwell Smart's picture
Offline
Joined: 05.11.2003
Location: London
Re: look what a standard G can do...

Well I thought it was an illusion originally but look at the direction the snow is flying off the tires when they are spinning backwards.... and I would suspect he didn't have the dif locks on if he is intentionally trying to slide it.

marcus
marcus's picture
Offline
Joined: 02.05.2004
Location: Co. Antrim, N. Ireland
GWOA Groups: Members
Re: look what a standard G can do...

Well actually one would lock up the rear diff , to slide the back end, ie the same as high performance cars with limited slip diffs to prevent loss of traction when cornering hard, but then I keep thinking 460, not permenant 4WD 463.
ie I can act the ejit in a grassy field if I lock up the rear end and then do power slides etc, its one way of keeping the grass cut.
No difflock, the inside wheel will simply spin.
Anyone want to loan me a 463 for a run to the artic circle to sort this out ?
Cheers
Marcus