The most complicated steering ever.

[JasonInAugusta]

Here's the plan for steering on my Boyer Scorpion. I think I've come up with the most complicated (and expensive) RC steering set-up ever.

To explain the diagram, there are two hydraulic cylinders per axle (mounted inboard of the axles), with one connected to each steering knuckle. A common steering link will tie the knuckles together. The reason for this is that hydraulics are stronger pushing than pulling. Each cylinder has 7+lbs of force when pushing, slightly less when pulling. Two per axle in a push-pull configuration (when tied together with a common link) keeps the force constant.

The hydraulics obviously require a pump, which is powered by the electric motor. The pump also holds all the fluid. To prevent the motor from running as soon as the battery is plugged in, I figure I'll stick the negative lead on a microswitch which is turned on by the 3rd channel of my radio.

The rest of the junk is in there 'cause I was bored at work.

[willyrocket]

Looks good......

where did you find the pump and actuators????

what kind of pressure does it put out???

[JasonInAugusta]

The system operates at 100 psi.

I'm getting them from Germany.

The vavle is operated by a small micro servo.

[aubie]

Nice fluid movement, long hair... Damn, staring at the wrong thing again.
Very impressive, What do you come up with when you are really bored?
How much weight would be added with a system such as this and do we even want to wonder about the cost.

[chuukrc]

Why don't you want the motor/pump running once you plug the batt in?

Looks like to steer your rig at all you have to turn the 3rd channel on. Might be a pain to flick a switch just to activate steering for the whole rig. You don't want to have the 3rd channel control the rear steering separately(if possible)?

If the hydro pump is off will the steering remain in whatever position it was in when the pump was turned off? Is the fluid locked in so that little bumps and shocks to the tires doesn't force the fuid out of the cylinders causing the tires to turn?

[Uncle_Manuel2]

Originally Posted by JasonInAugusta

I'm getting them from Germany.

Where do you buy it?

Manuel

[JasonInAugusta]

Originally Posted by chuukrc

Why don't you want the motor/pump running once you plug the batt in?

Looks like to steer your rig at all you have to turn the 3rd channel on. Might be a pain to flick a switch just to activate steering for the whole rig. You don't want to have the 3rd channel control the rear steering separately(if possible)?

If the hydro pump is off will the steering remain in whatever position it was in when the pump was turned off? Is the fluid locked in so that little bumps and shocks to the tires doesn't force the fuid out of the cylinders causing the tires to turn?

I don't want the motor/pump running once the batt is in due to A) noise and B) current drain.

To steer it is easy, use the thumbswitch on the XS3 to turn the pump on and drive. I won't have to hold the thumbswitch to drive, I can set the 3rd channel up to operate 3 different ways. When I'm not driving, or take a break, I'll just turn the hydraulic pump off by remote.

Yes, when the pump is off the tires will stay in whatever position they were in when the pump is shut off...unless you force them to move.


Uncle_Manuel2,

From what I understand, I'm getting a one-time deal to buy the parts...I was actually told not to tell people where I'm getting them. Odd, I know. :?

[SR5Dave]

Wow! Thats awesome.

I was more distracted by your avatar though Where'd that come from?

[extreme]

hey jason, have you ever heard of a thing called a servo!!

you better get a pic of those parts as soon as possible, or else ........

[JasonInAugusta]

Originally Posted by aubie

Nice fluid movement, long hair... Damn, staring at the wrong thing again.
Very impressive, What do you come up with when you are really bored?
How much weight would be added with a system such as this and do we even want to wonder about the cost.

Not sure how I missed your post.

Thanks!

What do I come up with when I'm really bored? I've got a couple of things sketched out.

As far as weight, I'm not quite sure. I'll have to find out when the stuff arrrives.

Cost...~$600

SR5Dave - Saw that avatar on a 1:1 car forum ages ago, saved it, stuck it on my server and have used it from time to time.

Originally Posted by extreme

hey jason, have you ever heard of a thing called a servo!!

you better get a pic of those parts as soon as possible, or else ........

Dude...didn't you read? There's a micro servo controlling the valve.

[NeoSlayer888]

Wow, I always wanted to do something like that. Your lucky you got your hands on a hydro system that small. My one question is what is the bore and stroke on the cylinders? I hope it turns out how you want it to good luck.

[JasonInAugusta]

The cylinders have a 7mm bore and 25mm of stroke from fully compressed to full extension.

[kevinlongisland]

dude, i can't read anything,i just keep looking at your avatar!

[JasonInAugusta]

It's all part of my two step plan.

1. Gain control by hypnotizing everyone with my avatar.

2. World Domination!

[BUGDRY]

Originally Posted by JasonInAugusta

Here's the plan for steering on my Boyer Scorpion. I think I've come up with the most complicated (and expensive) RC steering set-up ever.

To explain the diagram, there are two hydraulic cylinders per axle (mounted inboard of the axles), with one connected to each steering knuckle. A common steering link will tie the knuckles together. The reason for this is that hydraulics are stronger pushing than pulling. Each cylinder has 7+lbs of force when pushing, slightly less when pulling. Two per axle in a push-pull configuration (when tied together with a common link) keeps the force constant.

The hydraulics obviously require a pump, which is powered by the electric motor. The pump also holds all the fluid. To prevent the motor from running as soon as the battery is plugged in, I figure I'll stick the negative lead on a microswitch which is turned on by the 3rd channel of my radio.

The rest of the junk is in there 'cause I was bored at work.

Can you repost the pic of the hydraulic diagram it isn't showing up anymore.

thanks