Accession Number:

AD0270084

Title:

WIND-TUNNEL TESTS OF A 1/20-SCALE AIRSHIP MODEL WITH STERN PROPELLERS

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC

Personal Author(s):

• MCLEMORE, H. CLYDE

Report Date:

1962-01-01

Pagination or Media Count:

142.0

Abstract:

An investigation was conducted on a 120-scale airship model to determine the characteristics and effects of sternmounted propellers. The investigation included tests of two different propellers, measurements of propeller thrust and power characteristics, airship force and moment characteristics, hull pressure distributions, and hull boundary-layer and wake characteristics. The tests were conducted for several propellerblade angles and rotational speeds for test velocities of about 94 and 139 ftsec. The stern-mounted propeller gave a much higher propulsive efficiency than did a conventionalmounted or a fin-mounted-propeller. Sternpropeller operation had very small effects on the model aerodynamic characteristics.

Descriptors:

• *AIRSHIPS
• PROPULSION SYSTEMS
• MODEL TESTS
• AERODYNAMIC CHARACTERISTICS
• WIND TUNNEL TESTS
• WAKE
• WIND TUNNEL MODELS
• BOUNDARY LAYER FLOW
• AERIAL PROPELLERS

Subject Categories:

• Lighter-than-air Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE