Background: S-TEC, now part of DRS Unmanned Technologies, Inc., began production of the Sentry in 1986. Its design has since evolved over a number of variants, growing in weight and capability to the latest model, the STM-5B-1. Its maker's primary business is manufacturing autopilots for general aviation aircraft, a market in which it holds over a 70 percent share. Sentry benefits from this expertise, with its stable flying qualities directly resulting from use of this autopilot. To date, over 130 Sentries have been produced; over 400 hours of factory acceptance and demonstration flights have been accumulated since Jan 1996. Its customers have been the U.S. Government, including the Army's Night Vision Lab and the Naval Research Lab. Current rate of production is less than two per month, but with the capacity to produce five per month and the capability to expand further within current space.

Length, ft	7.96	Wing Span, ft	11.0
Gross Weight, lbs	250	Payload Weight, lbs	75
Fuel Capacity, lbs	60	Fuel Type	Gasoline
Engine Make	Herbrandson Dyad 290	Power, hp	25.5
Structure	Carbon fiber, kevlar
Guidance	S-TEC 750A(i) DFCS	Navigation	Trimble GPS
Data Link(s)	S-band	Data Rate(s), bps	9600

Endurance, hrs	8.0	Radius, nm	200
Max Speed, kts	100	Stall Speed, kts	30
Altitude, ft	16,000
Takeoff Means	Conventional/pneumatic launcher/ wheeled dolly
Navigation Modes	Preprogrammed (100 points)/ autonomous/direct control
Landing Means	Conventional (wheels or skids)/ parafoil/parachute

Sensor(s): FSI Ultra 3000 EO/IR; Inframetrics Mk II EO/IR