This is useful for identifying other planes as friend or foe. Sidewinders will not lock on aircraft lower than 150 feet, but once they are locked on, they will track a plane below 150 feet. Sidewinders stop tracking and follow ballistic paths when they run out of fuel. The Cessna 150 does not generate enough heat to attract sidewinders. A good pilot can usually outmaneuver a sidewinder unless his plane is traveling slowly with a heavy load.
Sidewinders have a smaller kill radius than rockets.
The e key fires a cannon round. The cannon has a limited range-each cannon shell exists for only one second. Cannons have the smallest kill radius. The r key destroys the current missile. Any aircraft in range of the explosion is destroyed.