Different Servo Placement on the S4

[xx4-nutter]

hey all,


as they are when there upright the servo arm/buckle look really orquard so by doing it this older way i had more room for mounting my KO receiver on top of it.



i tried the older way of running the servo flat like this last sunday at our local club and the steering felt far better, i used B4 servo posts and it was fine !





Garry.

[Chris Doughty]

I didn't like the steering exponential when the servo was flat.

I really like the linear steering feel when the servo arm moves in the same plane as the steering bellcranks. the angled servo arm is not idea like that, but its angle does not change so you get full linear control over your bell cranks.

[xx4-nutter]

why was youre servo arm all twisted chirs ? sure ive seen that on youre car ..

[OldTimer]

To get a flat servo lined up right, we would have to cut the wall of the tub and it would also leave the servo horn exposed to knocks from the side.

With more people using low profile servos everything is on the correct plan when in the vertical position.

[footey]

so would this work with a low profile servo

[OldTimer]

You could do and have the ball stud on the other side of the servo arm to keep the link straight.

[xx4-nutter]

thats the plan in a few weeks hopfully get one sorted

[Chris Doughty]

Originally Posted by xx4-nutter

why was youre servo arm all twisted chirs ? sure ive seen that on youre car ..

it was to get the ball cups 'flat' with the balls. a straight angled rod would work just as good.

you could do the lay-down servo with a low-profile servo, but I think the point of the stand-up servo is to have the servo arm moving in the same arc/plane as the steering bell-cranks to give a more linear steering feel.

[xx4-nutter]

Originally Posted by DoughtyUK.net

it was to get the ball cups 'flat' with the balls. a straight angled rod would work just as good.

you could do the lay-down servo with a low-profile servo, but I think the point of the stand-up servo is to have the servo arm moving in the same arc/plane as the steering bell-cranks to give a more linear steering feel.

the bellcranks on my dads car with the servo stood up are dead inline when the steering mooves, servo horn and bellcrank moove at the same time and are level like that..

but ill invest in a low profile servo and have it lay down me thinks

[Chris Doughty]

some people might like having a bit of expo on their steering feel. I don't.

[Body Paint]

I'm with Chris here, if I want steering expo I'll dial it into my tranny.

What you'll find with a lay down servo, be it a standard or a low pro, is a lot of steering response around the neutral point but less response around the full lock. Now, this feel will be different with different types of servo aswell. With the high response Digital KO servos like Chris and myself run the steering "spools up" almost instantly, with other servos (especially analogue) the steering will acelrate as the servo traverses through it's 60 degrees.

If you have a slower responding servo then a laydown format may actually feel more linear than a with a digital servo layed down, however the opposite would be true if you were to run a stand up servo. With slower responding servo in standup position you are more likely to feel any lag in the servos aceleration due to the more linear effect of the servos arc.

Ok class, you can go now