Safe Speed Forums

The campaign for genuine road safety
It is currently Wed Nov 12, 2025 03:44

All times are UTC [ DST ]




Post new topic Reply to topic  [ 27 posts ]  Go to page Previous  1, 2
Author Message
 Post subject:
PostPosted: Sat Sep 04, 2004 09:41 
Offline
Member
Member

Joined: Thu Mar 11, 2004 00:24
Posts: 2400
Location: Kendal, Cumbria
SafeSpeed wrote:
...And it all scares the hell out of me. I *know* the level of available grip by steering feedback. I find straight ahead in a skid by the steering wheel tug from the castor angle. I know if a front wheel locks up under braking because of the steering tugs. I don't want them to take these vital messages away. Neither do I want synthetic messages.

As far as the BMW variable ratio thing goes, folk are commenting that you never know how much lock to wind on - I'd much rather know, turn and then adjust if necessary - the idea of not knowing with certainty, in advance, what the effect of turning the wheel is... well, er... complete crap.

I can't make my mind up what to make of it! I've never driven one but everything I've heard about it seems to suggest that in practice it is very subtle - that you only notice its effects when you step back into a normal car!

I've always been fundamentally opposed to driver aids like ABS, TC etc, as I felt they diminished the driver's skills, so in the long term the net change was a negative one. But I'm gradually changing my mind, recognising the pragmatic approach that most drivers don't have these skills anyway, so offering a "mechanical substitute" will yield a gain after all.

I'd be very interested to try this adaptive steering though - I'm intrigued now!

_________________
CSCP Latin for beginners...
Ticketo ergo sum : I scam therefore I am!


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Sat Sep 04, 2004 11:10 
Offline
Site Admin
User avatar

Joined: Sat Mar 06, 2004 06:46
Posts: 16903
Location: Safe Speed
JT wrote:
I've always been fundamentally opposed to driver aids like ABS, TC etc, as I felt they diminished the driver's skills, so in the long term the net change was a negative one. But I'm gradually changing my mind, recognising the pragmatic approach that most drivers don't have these skills anyway, so offering a "mechanical substitute" will yield a gain after all.


See new thread: "Electronic driver aids"

JT wrote:
I'd be very interested to try this adaptive steering though - I'm intrigued now!


Yep. Same here.

_________________
Paul Smith
Our scrap speed cameras petition got over 28,000 sigs
The Safe Speed campaign demands a return to intelligent road safety


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Sun Sep 05, 2004 08:46 
Offline
Gold Member
Gold Member

Joined: Sun Jun 27, 2004 14:47
Posts: 1659
Location: A Dark Desert Highway
when I did my advanced course they discussed steering and it all made a little more sense. If your arms are across your steering wheel hub and the air bag deployes your going to be hit in the face with your own arms. Also If you don't have full control of your wheel then if the unexpected happens the you will probably loose control.

I really do try to keep both hands on the wheel at all times but in reality it's only when I am thinking abou it.

In the next couple of weeks I will be harvesting potatoes with no hands on the steering wheel and not looking where I'm driving and probably talking on the phone, texting, eating, drinking from flask, reading operators manual all of of which will be done while driving in formation, sometimes as close as 1 inch fron the vehicle next to me. And there is no mechanical conection between the steering wheel and the front wheels either.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Sun Sep 05, 2004 16:11 
Offline
Gold Member
Gold Member

Joined: Wed Apr 21, 2004 17:46
Posts: 823
Location: Saltburn, N. Yorks
Horses are clever... :lol:


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Nov 09, 2004 04:27 
Offline
Friend of Safe Speed
Friend of Safe Speed

Joined: Sat Mar 06, 2004 12:01
Posts: 4813
Location: Essex
Only just been directed here. My general technique in my very high geared 4WS Accord (under 3 turns lock to lock - and turned almost as tight as a taxi) was a hybrid of a lot of the above. On the straight, right hand at three PM, right elbow on armrest; left arm free for any auxiliaries (razor, radio.....) but when otherwise unoccupied, loosely gripping at 9 oclock, relieving right elbow pressure from armrest. For a single bend, generally I got a pre-emptive fresh grip on the straight - such that I was at quarter to three at the apex of the hazzard. Depending on how fast I was travelling and what the risk of hitting an obstacle was, I would either return to the straight ahead without letting go, then, one hand at a time go back to quarter-to-three, or cautiously let self-centre take it back to the straight ahead, controlling the return with friction, leaving my hands at quarter-to-three. For any combinational hazards, "fixed input" as defined above worked fine.

In this latest Accord, the turns lock to lock is greater and the turning circle smaller. The same technique above as described is used where appropriate, but it often requires some very strange - almost contorted - preemptive grip changes to get to the 9o and 30 grip at the apex.

Not quite sure when I developed this technique or why - but it does seem very ... right. I appreciate that it requires more subconscious computation than if I never left 9o and 3o on the straight ahead, but it works for me.

Not sure what I do in bad weather - and it's been 25 years since I was on a skid pan - and our local police headquarters no longer has a pan. Pity.


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Nov 09, 2004 09:55 
Offline
User
User avatar

Joined: Tue Apr 13, 2004 18:41
Posts: 893
I'm confused about what is meant by "fixed-input" steering. I had assumed it to be a technique where you kept a fixed (or constant) steering input throughout the turn. I can think of two ways to do this, with both rarely being safe on the public road:
  1. Apply the "correct" steering input to take you around the corner without adjustment. Because bends are rarely perfect arcs, this will involve drifting from side to side as your car follows the "best-fit" arc for the corner.
  2. This only works on cars that tend to understeer near the limit. Enter the corner near the limit of adhesion. Turn into the corner with a little too much lock, which you hold fixed as the car travels around the bend. As the car moves towards the inside of the bend, increase the throttle to increase the amount of understeer, and so increasing the turning radius. Continue around the bend controlling the path the car takes by adjusting the amount of understeer. Effectively, you're steering using the throttle.
... well, I did say that these methods are rarely safe on the public road.

FWIW, I'm too tall to use anything other than ten-to-two in normal driving, and my legs prevent me from taking my hands lower than twenty-to-four in most cars. So, it's the BSM shuffle for me. I also keep my thumbs outside the wheel (and have done ever since taking a basic off-road course).

_________________
Will


Top
 Profile Send private message  
 
 Post subject:
PostPosted: Tue Nov 09, 2004 10:07 
Offline
Member
Member

Joined: Thu Mar 11, 2004 00:24
Posts: 2400
Location: Kendal, Cumbria
willcove wrote:
I'm confused about what is meant by "fixed-input" steering. I had assumed it to be a technique where you kept a fixed (or constant) steering input throughout the turn.

"Fixed input" merely relates to whereabouts you grip the wheel - it has nothing to do with how much you turn it! If you read the early posts in this thread it's explained there in more detail.

_________________
CSCP Latin for beginners...
Ticketo ergo sum : I scam therefore I am!


Top
 Profile Send private message  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 27 posts ]  Go to page Previous  1, 2

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You can post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
[ Time : 0.013s | 10 Queries | GZIP : Off ]