A possible map for the CybotHelico is
ctf-urbanhelicopterwars - it's not a particularly large map but there are helis (movers) in it already.
A very large map suitable for tanks and helis is MH-UM-Airbase
Shot00518.jpg
Konoko encounters some giant spiders
Shot00519.jpg
The map would obviously need some 'conversion' work to remove the monsters, etc - I can't find a download link for it and can't remember where I got it from so it's a bit academic.
As a matter of interest, the BlockMonsters actor prevents the tanks/helis from spawning and/or moving and pretty quickly results in their destruction (I've obviously taken it out along with most of the monsters - I think I added the spinners for a bit of fun).
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