Mercury Sable RC steering help

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SUMMARY

The discussion focuses on converting a 1993 Mercury Sable into a remote-controlled (RC) car while maintaining street legality. The user, Zac, has successfully implemented pedal controls using a winching servo but faces challenges connecting a high torque 3.5 rotation servo to the steering shaft without compromising the vehicle's operability. Suggestions include incorporating a clutch in the steering servo linkage to allow for manual driving and exploring handicap accessible auto modifications for joystick control.

PREREQUISITES
  • Understanding of RC servo mechanics and specifications
  • Knowledge of automotive steering systems
  • Familiarity with drive-by-wire technology
  • Experience with vehicle modification regulations
NEXT STEPS
  • Research RC servo integration techniques for steering systems
  • Explore clutch mechanisms for steering linkage in vehicles
  • Investigate handicap accessible modifications for joystick steering
  • Learn about drive-by-wire systems and their components
USEFUL FOR

This discussion is beneficial for automotive engineers, hobbyists interested in RC vehicle modifications, and individuals exploring autonomous vehicle technology.

Gigabyte111
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hey, i need some help with a project i am working on.

what i am trying to do is take a full size car and turn it into a RC car. however, inorder to keep the car street legal, i need to keep all the controls operable by a person. i am using only off the shelf parts and servos that you can buy at most hobby shops. hardly anything is custom made. i have already successfully set up the control for the pedals, using a cable that pulls the pedal down as it is reeled in by a winching servo. that way i can still press on the pedals manually without interference with the servos. i will include a diagram later to show how that works.

however, my problem is with the steering. i can't find any way to connect the high torque 3.5 rotation servo to the steering shaft without destroying the streetability of the car.

ill give you as much information about the car as possible so you might better understand what I am doing

1993 Mercury Sable 179k miles
v6 fuel injected (blown head gasket)
automatic transmission with 4 gears
power steering
airbags have been removed
steering wheel attaches with a singe bolt torqued to 23-33 ft-lb
4000 rpm max before rev limiter kicks in
8 inches of non turning steering column are exposed. this is where I am considering mounting the servo...
fuel cut off valve has been rewired to a remote starting device, so i can kill the car in the event it losses contact with the transmitter
wireless camera soon to be mounted on the dashboard
(as soon as the company sends me one that ISNT defective)
any thing else you want to know about the car just ask.


my ultimate goal with this project is turning the car into a drive-by-wire system. i want to do this, because eventually it will become an autonomous vehicle, possibly i will even enter it into the DARPA grand challenge.

thanks for all your help.
~Zac~
 
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Sounds interesting, Gigabyte.
Can't you just include a clutch in the steering servo linkage so that you can de-couple it for manual driving?
 
You could look into handicap accessible auto modifications.
Some of these provide joystick control.
 

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