Encyclopedia of Terminology U
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Slot and Slotless Car and Truck Users.
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ModelMotorist.Com: Encyclopedia of Terminology U for the HO Scale Slot and Slotless Hobby.
Ultra-5 1. Style of Aurora HO scale slotless cars and tracks.
Ultra-5 HO Slotless Cars Chassis 1. In-Line Motor - pinion and crown - trans-axle drive. 2. Solenoid controlled steering. a. Aurora Ultra 5 "A" HO Slotless Car Chassis.