Other Stuff > Misc / Open
Cables / sheath lube
K2-K6:
--- Quote from: Orcade-Ian on January 09, 2023, 01:36:19 PM ---Lobo,
Surely there's some electronics geek on this forum who might help with a modern solution for your V Dub?
Model aeroplanes use servomotors which should be able to cope with moving the linkage on the carb. A throttle potentiometer could be used to accurately measure how far the pedal is being pressed. A model aircraft would then need radio control the marry the two pieces of info but yours can be hard wired, with some kind of electrickery in between.
Ian
--- End quote ---
I can see that as most current vehicle use throttle potentiometer often mounted in pedal assembly complete. My son runs a RC nitro car with decent servo for throttle/brake and steering that are quite resilient (36,000rpm, non scale speed near 50mph with alot of vibes and heat) and so hardware potential.
The car systems from my knowledge usually run into the ecu though with startup checks on position etc to verify neutral operations, how that could be incorporated is likely more difficult for a road vehicle.
It looks to me more like a hydraulic clutch type application, with master and slave, plus long roll of flexible hose. That would be "self zero" effectively and could be designed with non used cable left detached for contingency. The hydraulic advantage over cable being almost nil friction in use and using automotive tested components.
Bryanj:
Remeber the first Hillman Imp, they had air hydraulic throttle that left you pumping the pedal to get revs!
K2-K6:
--- Quote from: Bryanj on January 09, 2023, 07:46:17 PM ---Remeber the first Hillman Imp, they had air hydraulic throttle that left you pumping the pedal to get revs!
--- End quote ---
My dad's friend had an imp that had some difficulties ;D but I was too young to remember the details of what exactly was wrong.
K2-K6:
OK, punting around the great wide t'internet and came across this
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Apparently used in USA hotrodding applications, seems simple enough concept wise.
Lobo:
Don’t talk to me about Hillman Imps - I sold my beautiful 400F to raise £s for flying lessons, and with the change bought an Imp. G/f then bought one (and later another) and every w/e thereafter I was grubbing around breakers yards (in the good old days where they pointed you to a corner and you trudged off in the rain with your tools) to retrieve the wanted part. The heater system… aaargh; I used electric gloves to get me over the Pennines on my weekly runs home to get my laundry done / get a good feed.
Wrt electronic throttle system, two issues come to mind. (1) it could have severe legal implications in the event of any accident unless fully declared both to the insurance co - (who would likely then decline) and also Land Transport - who’d demand inspections and all types of brouhaha. It’s a path I don’t want to go down. But more importantly (2), I want to keep the old girl as standard as possible for both simplicity and authenticity. Purely in the interests of safety I’ve fitted front discs, inertia belts and a modern steering rack - but it has stopped there.
Thoughts appreciated- thanks gents; Ted will test soak my tube for a couple of weeks, it is tho’ 4mm ID to carry a 1.5mm cable and so plenty of tolerance.
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