Accession Number : ADA289469

Title :   The Design and Development of a Low-Speed, Low-Force Wind Tunnel Data Acquisition System With an Application to Bicycle Front Fork Spacing.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Elledge, Alan W.

PDF Url : ADA289469

Report Date : DEC 1994

Pagination or Media Count : 80

Abstract : This thesis encompassed the design, development, and application of a low-speed, low-force data acquisition system for the AFIT 5-ft Wind Tunnel. The new data acquisition system was designed and developed to measure approximately 0.045 N (about 0.01 lbr) at nearly 64.4 kmlh (40 mph). Verification of the capability was obtained through testing of a cylindrical model. As part of a technology transition program with Wright Laboratory, this new system was used to investigate bicycle front fork blade spacing in order to determine the optimal spacing for minimum drag. As for the minimum drag of a bicycle with an adjustable-width front fork, the spacing should be kept to a minimum. The wind tunnel was deemed to have sufficiently smooth and steady flow for conducting low-speed research at or above 29 km/h (18 mph), the minimum tunnel velocity using the rear set of motors with the flow straightener positioned directly in front of the inlet.

Descriptors :   *SYSTEMS ENGINEERING, *AERODYNAMIC DRAG, *DATA ACQUISITION, *GROUND VEHICLES, *WIND TUNNELS, OPTIMIZATION, VERIFICATION, MODELS, THESES, LOW VELOCITY, CYLINDRICAL BODIES, TRANSITIONS, MOTORS, STEADY FLOW.

Subject Categories : Surface Transportation and Equipment
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE