I have an Aero-Tow 200 tug I use on my Cirrus SR22 (max gross weight 3,400
lbs). It works well, although it sometimes requires an extra push or pull
to get over door tracks.

This is an electric tug, and although it does not have a separate speed
control switch, it is easy to control the speed. When you first select
forward or reverse, it starts moving slowly. As you hold down the switch,
it gradually speeds up until it is at its (not very fast) maximum speed.

Regards,

-Mike

"Peter" wrote in message
...

Looking at the responses I don't think anybody has actually read what
I originally wrote:

A colleague is looking for a tug, perhaps an electric one, capable of
towing the aircraft (a TB20) by the first wheel a distance of about 50
yards.

I say "electric" because petrol engined tugs seems to be a bit
temperamental, and this is in a very tight hangar and a lot of control
over the forward/reverse speed is needed.

and people suggest using TRACTORS???

The options I am looking at are

http://www.aero-tow.com/ (e200 or e300)
http://www.powertow.com/12V.html
http://www.dragger.com/ndd.html (the first two)

One thing I've learnt is that at least some of these electric tugs
don't have variable speed control - the motor just goes on and off.
Whereas the gas powered tugs have the rudimentary control of throttle
and a clutch.