Graeme wrote :
Great idea but it rarely works so a friend had the idea of using an aquarium
pump to direct a jet of air through the vanes. It works perfectly, but just
as I got mine going, the poxy bulb blew! I suppose the bulb must be 60 years
old, so shouldn't really complain.

If rising heat from the bulb was enough to make it spin, rather than
the pump, why not use the heat produced by a resistor? It would be
completely silent.

What is the supply voltage of this gadget?