Accession Number:

ADA191683

Title:

Aerodynamic Characteristics of Fin- and Flare-Stabilized 25 mm XM910 Prototypes

Descriptive Note:

Final technical rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Celmins, Ilmars

Report Date:

1987-12-01

Pagination or Media Count:

45.0

Abstract:

Test firings of prototype fin- and flare-stabilized 25 mm training rounds were conducted. The fin-stabilized rounds were found to be capable of fulfilling all of the training round ballistic requirements. The flare- stabilized rounds were studied as a possible lower cost alternative. Initially, a large angle flare design, similar to existing tank gun training round, was tested, but data showed the configuration drag coefficient was too high. Subsequent computer predictions indicated that a small angle flare would have significantly lower drag and sufficient stability for flight. A four-degree flare was fabricated and fired, confirming the drag and stability predictions.

Descriptors:

• *AERODYNAMIC CHARACTERISTICS
• *TRAINING AMMUNITION
• *GUNS
• COMPUTERIZED SIMULATION
• STABILITY
• PREDICTIONS
• LOW COSTS
• FIRING TESTS(ORDNANCE)
• PROTOTYPES
• MATHEMATICAL PREDICTION
• COEFFICIENTS
• CONFIGURATIONS
• DRAG
• BALLISTICS
• FINS

Subject Categories:

• Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE