

Hitpoints: N/A
Movement: 12
Damage: 1
Range: 6
Cost: 3
Special: Can only land on capitals and carriers. They have a range of 6 if they attack, and a move of 12 if they are flying from place to place. Cannot both move and attack. Can only be destroyed if the enemy kills their carrier, or moves into their capital.
I like to think of airplanes as an investment. Up front, it doesn't seem to help you that much for how much it costs. Each one can only do 1 damage per turn, while for 1$ more, a Rocket Launcher or Heavy Bot will do 3 damage. But the fact is, well protected planes never die! That means, over their lifetime, they will do more overall damage than any other unit.
The point to understanding how to use planes is to think of them as a support unit rather than a main assault unit. They are almost worthless when you are trying to defend a place where you are vastly outnumbered. Its much better to buy 3 LAVs which will stop the enemy progress for a time.
What planes excell at is cleaning up after other units. While a Rocket Launcher blast is wasted on a LAV with 1 hp left, 3 planes can take out three weakened units. They are also great at softening up the tougher enemy units before they reach your lines because of their long range. You can keep those nasty rocket launchers at bay too.
Because of their price and vulnerability, you must protect your planes. One easy way to do this is always keep an LAV in a capital with planes... Its like 1$ insurance to keep your 9$ worth of planes alive. If you don't, you might find an enemy transporting an amphibian clear across the board in one turn. Even if the enemy manages to destroy the protection, you can always fly your planes to a safer location before they are in danger.
And one more thing: be careful about flying your planes into a newly invaded territory... ask Magistr Honna about his favorite disclosure trick :).
(Written by Maelstrom)
If you have more planes than you can use consider buying a Carrier - that way you'll add mobility to this ground-controlling weapon.
(Added by Skykeeper)
This unit is discussed in the Massive Assault forum: http://massiveassault.com/forum/viewtopic.php?t=281