fly_wheel

iTrader: (9)

i got some questions about ankermann setting & front in-board toe.

less ankermann (more parallel) = better tighter steering?
more ankermann (less parallel) = better high speed steering?

i got a s400 n i like to know which setting give me more ankermann n which is less. can someone help?




what does in-board toe do? i need more steering for tighter turns. default for s400 is front in-board toe out is 2.0 degree. but most car uses no in-board toe.

thanks.

seaball

iTrader: (9)

flip that around and you'll be on the right track.

in order to increase the ackermann angle on that car, you'll want to spread the pivot points on the bellcrank. moving them back will achieve this as well, but you'll also be changing the speed of the steering.

at the rear, it changes how the car rolls in a turn. generally, the inboard toe will make the car feel softer in the front, by inducing more roll over the front. in my experience it's not that coarse of a change.

fly_wheel

iTrader: (9)

so more ankermann = better n tighter turn

which one of these bell crank n knuckles setting give more ankermann? can someone number them from more to less ankermann? thanks.

1)


2)


3)


4)


5)


6)


7)


8)

fly_wheel

iTrader: (9)

u mean like the setup in pic #2..?

94eg!

iTrader: (17)

Yes, #2 would be the most Ackerman & the fastets steering. If you switch the hole on the knuckle, your steering speed and ackerman is reduced...

M-Technic

iTrader: (15)

fly_wheel, with my S400 I kept the ackerman in the stock location (whatever the setup manual suggested) but I narrowed the front end by switching to different toe blocks. The stock toe blocks are 3* in the front and 1* in the rear. I switched to 2* and 0* which kept the 2* of arm sweep but narrowed the front end. This helped the overall steering, and it was a similar change to using narrow wheel hexes, which I didn't own.

I also knew some Serpent team drivers that preferred to run no arm sweep at all, which gives you more entry steering but less mid and exit steering.

seaball

iTrader: (9)

least:



most:



the complete order of the steps in between can't be determined w/o all the relevant geometry. there comes a point of diminishing returns with ackermann, where adding more will just make the car push. #2 strikes me as being across that line.

Cpt.America

iTrader: (52)

The xray setup book says the more parallel the steering links are, the greater the ackerman affect, opposite of what you say above. Iv never really tested it or really examined it that closly... i just went by what my setup book says.

So which is it?

fly_wheel

iTrader: (9)

thanks for all the inputs... i will try the #2 ankermann setup then change the toe blocks... i have all the toe blocks but never really play with them much... i never really do my car setup actually , i just drive what my fren did for me but recently i found out i need something different to go a little faster (besides buying a lot of rubber tyres, LOL)... the ankermann has been quite a little confussing topic as many has their different ideas... some books said this but some says that...

well, i got some rough idea to try out now, thanks again & also thanks to the PM i received regarding the wrong spelling of "ankerman to ankermann" hehehehe...

JimmyMac

iTrader: (2)

Generally, all you need to remember is that in most situations, the more angled the steering linkages, the more steering for tight turns. The straighter the steering linkages, the better for fast flowing turns. So you need to find a happy balance for your track.

kerk

iTrader: (2)

This is great, just learnt more about Ackermann!! Thanks guys!

Cheers!!

seaball

iTrader: (9)

my last post is correct. (draw it in simulink, or matlab, etc.)

perhaps the xray book was referring to moving in the other direction (starting with links converging toward the front of the car and moving to more parallel). as the bellcrank pivot moves rearward (all other things unchanged) you will grow the ackermann rate.

fly_wheel

iTrader: (9)

both front n rear holes in the bellcrank create angles to the linkages... which one do u mean..? the one pointing to rear (rear holes at bell crank) or the one pointing at the front (front holes at bell crank)..? thanks...

Cpt.America

iTrader: (52)

According to Xray, you are wrong... unless I am not reading it correctly. Quoted from Xray:

Or is this only the case with Xray steering systems?

seaball

iTrader: (9)

50% of the time both are right. the other 50%, only i am correct.


if jurai's car can't go beyond parallel, the oversimplified statement about 'angle v. parallel' is all you need to know. but looking at the aligments posted so far, the s400 works on both sides of that. (in this case, making it a bad idea to use the xray book for the serpent car).