Accession Number:

AD0647085

Title:

AMPHIBIOUS VEHICLE STUDIES.

Descriptive Note:

Final rept.

Corporate Author:

CONTROL DATA CORP MELVILLE NY TRG DIV

Personal Author(s):

• Kotik, Jack

Report Date:

1966-06-01

Pagination or Media Count:

46.0

Abstract:

The report describes theoretical work aimed at increasing the speed of amphibious vehicles in the water, by decreasing resistance and if grousers are used for propulsion improving the flow to the grousers. Alternate mathematical models of the flow were examined and it was concluded that a simple block singularity model gave the best fit to measured resistance data. Although the fit is not very good, and although the mathematical model does not represent the vehicle shape very accurately, it was decided that the model was good enough to serve as a basis for the design of hull modifications intended to reduce drag and improve the flow to the grouser region. A bulb-like singularity modification was designed mathematically and showed a substantial calculated resistance reduction. Due to lack of funds it was not possible to examine the corresponding modified hull shape, nor to conduct any model tests, but the theoretical results suggest that further work in this direction would be profitable.

Descriptors:

• *AMPHIBIOUS VEHICLES
• *HULLS(MARINE)
• FLUID FLOW
• CONFIGURATIONS
• DRAG
• PERFORMANCE(ENGINEERING)
• MATHEMATICAL MODELS
• REDUCTION

Subject Categories:

• Surface Effect Vehicles and Amphibious Vehicles
• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE