Sikorsky SSC-A09 Data (Nominally Two Dimensional)
Abstract
The tests described were carried out in the University of Glasgow's 'Handley Page' wind tunnel, which is a closed-return, low- speed type with a 2.13m x 1 .61m octagonal working section (Fig 3). The model span and chord were l.61m and O.55m respectively, and its construction was of a fiberglass skin filled with an epoxy foam bonded to an aluminium spar. The model was pitched about the quarter chord by a linear hydraulic actuator and crank mechanism. The actuator was a Unidyne 907/1 type with a dynamic thrust of 6. lkN controlled by a MOOG 76 series 450 servo valve. Thirty five Kulite 093-5 PSI G ultra- miniature pressure transducers were installed below the skin in a removable pod at the centre-span of the model. The transducers were of the vented gauge type with one side open, via tubes, to ambient pressure outside the tunnel. Each transducer was fitted with a temperature compensation module to minimize changes in the zero-offset and sensitivity. Model incidence was determined using an angular potentiometer geared to the model's main spar. This provided feedback to the hydraulic actuator control system and the angle of incidence signal for the data recording system. The model incidence waveform was provided by a PC fitted with an ANALOGUE DEVICES RT 1815 input/ output board. The dynamic pressure in the working section was determined by measuring the difference between the static pressure in the working section, just upstream of the model leading edge, and the static pressure in the settling chamber. These pressure tappings were connected to a Furness FCOl2 micromanometer which provided an analogue signal for the data acquisition module.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2000
- Accession Number
- ADP010732
Entities
Organizations
- University of Glasgow