Military aircraft constantly fly into a theater of operations loaded with equipment and supplies, but often lack a back cargo.

Soviet aircraft lacked this, and pilots had to communicate with hand signals.

The aircraft was very fast but lacking in stability and control.

But he was told that the aircraft lacked sufficient fuel.

Some simple aircraft such as model gliders lacked any type of ailerons.

These first two aircraft will lack radar and weapon control systems.

These aircraft were great performers, but still lacked several important features.

The aircraft even lacked compasses, instruments and tool kits when they arrived.

However, the aircraft lacked self-sealing fuel tanks and pilot armor.

The most noticeable problem was that the aircraft lacked range and endurance.