Hi everyone!

I´m currently building a boat model, and I have an idea that this model should not drain batteries for lights and other functions! I will have a small modelengine(Homebuilt 6 cyl.) in the engineroom that will drive a generator for this powersupply!
And my problem is, how to make a generator!! Can I modify a electric motor for this use?
The poweroutput must be 6 V.....

How do I do????

Regards Runar