hardingfv32 wrote:
May I assume we are talking about the shocks? The shocks are responding to load applied to the wheels. There is no requirement restricting this response of the shocks.
Not in particular, but I´m sure, they are affected by changes in temperature as well, and not only by changing wheel loads.
Otherwise, why would people feel compelled to write whole articles on this very subject?
TEMPERATURE EFFECTS ON THE DAMPER
How about springs?
According to this graphic, spring rate will change between 3-5% if the temperature raises from ~20 - ~150°C, while load remains constant.
Increase in temperature will affect the elastic modulus and the elastic limit of most spring materials. The decreasing elastic modulus of spring alloys as temperature is increased is shown in the chart above. This change is completely reversible. Also, the rate of the spring will be changed in proportion to the modulus.
But hey, what do they know, it´s just the society of spring manufacturers.
http://www.spring-makers-resource.net/h ... rings.html
hardingfv32 wrote:
Down-force affects the chassis and the chassis affects the suspension. There is no simple yes or no, sorry.
Interesting statement, did you not just spend the last 20+ pages arguing, that the suspension should be only affected by the wheel? So how, can this be legal then, according to your understanding.
hardingfv32 wrote:
Now for my challenge:
'You CAN NOT state a form of movement that does not effect the load on the wheels. This is the validity test of your interpretation of this 10.1.2.'
Brian
I think, I just did, but you apparently did not liked it, because it does not fit into your paradigm about how the world/FIA rules should be read.
Now let me ask, some final questions:
What is that for a twisted logic, that because you can´t find a current situation, which would apply (and I just did), then this §§ in the rules is redundant, and does not need to be in the rules?
Does it crossed your mind, that rules are perhaps written, to exclude any undesired future developments, that can´t be foreseen at the time, that the rules where written?
You may did not like my example about the possible usage of permanent magnets to affect magnetorheological fluids in suspension components, and dismiss it as "non existent" [just because it is not listed in the latest PENSKE catalog], but who says, that there is not already research going on into this direction?
from:
Self-powered and sensing control system based on MR damper: presentation and application
.......However, these systems require external stable power supply, which may be not possible or assured in some extreme events, such as earthquakes and typhoons. To solve this problem, Chen et al. [5] have developed the permanent magnet MR damper, and successfully
applied it to a cable vibration control system.
This technology is may is not used in automotive application just yet, because it is easier to do it by other means, but who says, that a team could not pick up on this research and turn it into a F1 suspension system in the future?
And finally, if the FIA is as "hell bend" as you like, to make us believe, to exclude these "inertia sensing systems", why is it then, that they change the wording of § 10.1.
FIA technical reglement 1994 wrote:
ARTICLE 10 : SUSPENSION AND STEERING SYSTEMS
10.1 Sprung suspension :
Cars must be fitted with sprung suspension. The springing medium must not consist solely of bolts located
through flexible bushes or mountings.
There must be movement of the wheels to give suspension travel in excess of any flexibility in the
attachments.
The suspension system must be so arranged that its response is consistent at all times and results only from changes in vertical load applied to the wheels save only for movement permitted by inherent and fixed
physical properties.
into, your beloved § 10.1.2
FIA technical reglement 2012 wrote:
ARTICLE 10 : SUSPENSION AND STEERING SYSTEMS
10.1 Sprung suspension :
10.1.1 Cars must be fitted with sprung suspension.
10.1.2 The suspension system must be so arranged that its response results only from changes in load applied to the wheels.
and if you keep in mind what DaveW had to tell us:
DaveW wrote:
I think you are referring to "g-sensitive" dampers. The "crude mass" controlling damper ports and restrained by a spring forms a mechanical accelerometer. The spring is normally preloaded to set the acceleration at which the control activates.
They have been used since 1997 (to my knowledge), and have continued to be used (sporadically) to the present day. Mostly they are used for pitch control. Roll control was also tried initially but was not desperately successful largely, I suspect, because they were prone to change the lateral balance of the car.
Perhaps 1997 was the year, when the wording of the rules, changed to the current version.
Why would the FIA go to all the trouble, to change the wording of this rule, when they feel that these devices are illegal? - as you like to imply.
Makes you wonder doesn´t it?
Perhaps, you want to consider, if it is beneficial for your credibility and the forum in general, to do a little bit more listening and less talking for the foreseeable future.
After a while, you may be able to understand a thing or two, about the subjects, you like to talk about so much.
This is, if you have not driven people like DaveW and others away, with your annoying arguing, bickering and abrasive comments in general in the meantime.
Have a nice time Brian & enjoy the forum, it is always a pleasure talking to you.