Accession Number:

AD0876513

Title:

Air Force Preliminary Evaluation of the UH-1N Helicopter

Descriptive Note:

Final rept.

Corporate Author:

AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA

Personal Author(s):

• Springer, Robert H.
• Grawi, Franklin L.
• Angle, Theodore E.
• Nasal, Timothy P.
• Flanigen, Edwin G.

Report Date:

1970-08-01

Pagination or Media Count:

126.0

Abstract:

Limited performance, flying qualities and systems tests were conducted during a 24.5 hour evaluation of the UH-1N helicopter for the purpose of determining the gross deficiencies of the aircraft. The flying qualities were generally satisfactory with the flight control hydraulic boost system on. With the hydraulic boost system off, however, the control forces were so high that a Cooper-Harper Rating of 9 was given to boost off flight. Hover and climb performance met or exceeded the predicted values for the conditions tested. The maximum allowable level flight speeds were easily attained. Specific range and endurance differed significantly from predicted values. Aircraft subsystems generally performed adequately, however, several major discrepancies were noted.

Descriptors:

• *FLIGHT CONTROL SYSTEMS
• FUEL SYSTEMS
• THROTTLING
• FLIGHT TESTING
• COCKPITS
• DIRECTION FINDING
• RADIO ALTIMETERS
• GYRO COMPASSES
• RANGE(DISTANCE)
• CUT OFF VALVES
• CLIMBING
• TRANSPONDERS
• HELICOPTER ENGINES
• NAVIGATIONAL AIDS
• HOVERING
• HYDRAULIC EQUIPMENT
• LEVEL FLIGHT
• HANDLING
• COMMUNICATION AND RADIO SYSTEMS
• HELICOPTERS
• PERFORMANCE(ENGINEERING)
• ROLL
• PITCH(MOTION)
• AIRCRAFT

Subject Categories:

• Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE