ROAR/DMC Purple Bull 27T Graupner 97077 The Purple Bull series is based on the GM-Racing Cosmic case, with the latest and most powerful WET magnets, plus precision free-running plain bushes. The carbon brushes are carefully optimised to match the various windings and applications. The motor head is carefully designed for outstanding cooling and conductivity, and ensures that the motor generates maximum power. The new, more powerful magnets and the specialsheet material used in the armature produce enormous torque combined with low current drain. Purple Bull motors are machine-wound and dynamically balanced at several planes, and can easily compete with other manufacturers hand-wound ballraced motors. These motors are also especially suitable for stock-racing competition work, where maximum power is demanded. The result of their high efficiency is that you can safely operate GM motors with 2 turns less than conventional motors when you are using a GM speed control. Unique GM-Racing cosmic can. Precision low friction bushings. Machinewound. dynamic balanced. High Performance Longlife-Brushes (only Purple Bull). New Highpowerbrushes for 5 - 10% more Power (only Purple Bull Roar). New WET ceramik magnets. The characteristics of electric motors are primarily dictated by the number of winds and the total cross-section of the wire. Available wire sizes do not allow us to produce any cross-section we wish in the form of a double winding. For this reason, achieving a range of motor characteristics requires windings with different wire thicknesses and varying numbers of wires connected in parallel. Multiple windings also help to produce a slight reduction in losses due to eddy currents, and this generally leads to slightly higher rotational speeds. Motor power primarily varies according to total wire cross-section, and is dependent upon the winding characteristics of the wire, among other factors. max. Eff. 77 %
rpm 24200 rpm
power 127 W
Anker : splitted amature
Brushes : High Power Brushes
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