Well he already has the $500. However, I have been studying up on a series wound motor and I found a weakness that next time I do this bet will give me the advantage.


Series wound motors have the armature connected in series with the field. While it offers very high starting torque and good torque output per ampere, the series motor has poor speed regulation. Speed of DC series motors is generally limited to 5000 rpm and below. Series motors should be avoided in applications where they are likely to lose there load because of their tendency to "run away" under no-load conditions. These are generally used on crane and hoist applications.
(source: www.maintenanceworld.com/Articles/reliance/maintenance.htm)

According to the above, if this type of motor has no load on it then it will speed up to the point that destruction will occur. So next time I'll make sure his motor is turning in the same direction as mine, so that I can rev mine up to high speeds just long enough to cause his motor internals to mess up.