It's also got a digital flight control system and a modified upper stage.

The idea had merit, but the flight control systems of that time prevented the X-4 from any success.

Or the flight control system could have failed in some way.

Differences start with the improvements in the flight control system.

The press and media later questioned the fly-by-wire flight control system.

In this configuration, the flight control systems must simulate "feel".

Also added was a new automatic flight control system.

The computers act as the electronic brain of the flight control system.

The flight control system was borrowed from the F-16.

"We know they are monitoring flight control systems," he said.

It's also got a digital flight control system and a modified upper stage.

The idea had merit, but the flight control systems of that time prevented the X-4 from any success.

Or the flight control system could have failed in some way.

Differences start with the improvements in the flight control system.

The press and media later questioned the fly-by-wire flight control system.

In this configuration, the flight control systems must simulate "feel".

Also added was a new automatic flight control system.

The computers act as the electronic brain of the flight control system.

The flight control system was borrowed from the F-16.

"We know they are monitoring flight control systems," he said.