Member Since: 14 Dec 2006
Location: Mudgee
Posts: 377
Gareth,
Does HDC set low help prevent the lurching?regards
Peter
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Oct 2013 SDV6 3.0 HSE.
2007 TDV6 SE E-diff, adaptive lights sold 1/2014
13th Dec 2007 11:23 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26775
No. Turn off the HDC to prevent the lurching. I think its the two (HDC and Torque convertor) are fighting each other.
13th Dec 2007 11:31 pm
nwoods
Member Since: 03 Apr 2006
Location: Southern California
Posts: 563
Adam Spiker of OffRoving.com (same company as the LR3/RRS rock sliders) would definitely climb that in his Sport. He's done a lot of other similar things, like Tip Over Challenge in Moab Utah. I thought it was interesting that the LR3's tires were not aired down much, if at all.
On the first part of the video, that trail looked like California! That dude has great throttle control, but needs a better spotter (and a set of our sliders
14th Dec 2007 3:31 am
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Found another shot of "The Rock" on the t'internet which suggests about 37 degrees or nearly 1 in 1
Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
14th Dec 2007 9:13 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26775
Having watched the video of the failed hillclimbs, and noticing how readily the front tries to overtake the back on the way down. Surely this is because the the front of the vehicle is much heavier than the rear, and making the vehicle unstable.
I reckon (although I have never tried it so stand to be corrected) that it would be far easier to reverse up the hill.
This would in theory ensure the maximum weight transfer to the wheels with most grip (the trailing wheels i.e the front wheels if you are reversing), and if the climb was failed, then a safer and more controlled descent.
Maybe thats what that truck in your pic is doing SN?
14th Dec 2007 9:29 am
10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
heine wrote:
10forcash wrote:
, as long as the torque converter is kept locked you have inch-by-inch control
Does the TC stay permanently locked when in command shift ?
The torque converter is 'locked' when in command shift and any TR programme other than 'general', because it's an electronically controlled box, the amount of lock is varied dependent upon the TR mode selected - you can use engine braking for hill decent, which is an unusual thing for an auto 8)
For a hill climb such as the one in the video, my main concern would be weight transfer, reversing up it would mean that the high end would be very light and more likely to lift. Therefore picking the right route (minmum amount of bumps or changes in angle), precise and gradual throttle control (with left-foot braking) together with a good spotter would make the difference between 8) or
14th Dec 2007 12:18 pm
robsmith
Member Since: 02 Sep 2007
Location: Staffordshire
Posts: 2401
Gareth wrote:
Having watched the video of the failed hillclimbs, and noticing how readily the front tries to overtake the back on the way down. Surely this is because the the front of the vehicle is much heavier than the rear, and making the vehicle unstable.
Another possible explanation is that the rear (downhill) wheels havingg more weight on them due to weight transfer have just that bit more grip so dig in, while the lightly loaded fronts just go where they want to and not where you want them to. If you look at the D3 the fronts are ony just on the ground on occasions, so it was close to loosing it, but all its gear worked well and up it went, even though it was put through the normally mad thing of stopping on the slope.
Just goes to show what a good driver in a brillaint vehcile can achive
Scariest one was the person in the yellow shorty who had hold of the roll bar - good way to loose a few fingers
Rob
15th Dec 2007 8:03 pm
heine
Member Since: 07 Feb 2007
Location: Midrand
Posts: 4054
There is a 60 degree slope at the LRE course I did . Even though it is man made concrete and thus very smooth , it was scary how the front whhels where very close to coming off the ground . If you look at the 2 videos , you will notice that the D3 went up much slower , which probably also helped to keep the wheels on the ground
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