Aircraft Tugs

I used a robotow cordless for several years.
It's well made and it works well when the pavement is dry, but it is heavy
to carry to the airplane. I did not have the optional wheels.
It operates by spinning the nosewheel, and if it was wet the airplane would
not move without a big push. A solution is to have a can of sand to sprinkle
on the tire.

http://www.powertow.com/products.html ,the only way to tow.