Twin Clockwork Motor Driven Sports Car
Designed and Built by: Fred Bird
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Click on Photo to Enlarge
The objective was to build a simple light weight car powered by clockwork motors that had most of the mechanical functions of a car.
The two large motors are butted together side plate to side plate with about 1 cm space between them. They are arranged so that the key winding shafts are on each side of the assembly and are set so that the output shafts rotate in the same direction.
One half inch pulley on each output shaft, belt drives a one inch pulley on each end of a transverse mounted rod on which are two 19t pinions. Two holes below is another transverse shaft carrying a one half inch pulley, a 57t gear and another 19t pinion. This shaft is slid sideways to provide forward and reverse. Meshing one 19t pinion with the 57t gear provides the reverse gear. An additional 19t pinion is positioned (pivot bolt mounted) between the other two 19t pinions provides the forward gear when all three pinions are meshed.
A drive band from the one half inch pulley to the 2inch pulley on the differential gear, provides the final drive.
A collar on a rod mounted in the cockpit controls a brake on both of the motors simultaneously. When the collar is rotated the brake on the left side motor is activated directly and at the same time a linkage to the right side motor stops the pinion on the output shaft within the motor.
One half inch pulley on each output shaft, belt drives a one inch pulley on each end of a transverse mounted rod on which are two 19t pinions. Two holes below is another transverse shaft carrying a one half inch pulley, a 57t gear and another 19t pinion. This shaft is slid sideways to provide forward and reverse. Meshing one 19t pinion with the 57t gear provides the reverse gear. An additional 19t pinion is positioned (pivot bolt mounted) between the other two 19t pinions provides the forward gear when all three pinions are meshed.
A drive band from the one half inch pulley to the 2inch pulley on the differential gear, provides the final drive.
A collar on a rod mounted in the cockpit controls a brake on both of the motors simultaneously. When the collar is rotated the brake on the left side motor is activated directly and at the same time a linkage to the right side motor stops the pinion on the output shaft within the motor.
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The steering rod mounted between the motors has a small pinion that turns a 25 t contrate mounted vertically on a rod with a bush wheel crank that moves the steering linkage; suspension is by a compression spring on each steering axle.
The differential is the standard pattern and is driven by a 2 inch pulley. |
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Underside View
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Rear Quarter View |
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