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friction drive |
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| In the 1970s when most UK amateurs considered an 8-inch reflector to be a large telescope, Ron started using a 16" (406mm) reflector which had a friction drive to eliminate periodic error. A friction drive to the hands is provided from a wheel that rotates at a convenient rate, generally one time per hour. The Dinky Toys 1956 Ford Zephyr is illustrated on the 47p stamp and the Mettoy friction drive spaceship from the old 1960s Eagle comic is depicted on the 68p stamp. |
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