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Some tests of 12-in. dia. model VTOL ducted fans

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.4224/40003685
AuthorSearch for: 1
Affiliation
  1. National Research Council of Canada. Division of Mechanical Engineering
FormatText, Technical Report
Physical description67 p.
Abstract
Design studies have been made of a VTOL aircraft with a number of 36-in. 0/D fans buried flat in the wings for vertical lift. In order to obtain design data for these ducted fans, a programme of experiments on 12-in. O/D model fans was carried out. These were tested at true Mach number, and true disc loadings of 500 lb./ft? were sought, requiring a rotational speed of about 15,000 r.p.m. The test rig and instrumentation developed for this programme are described in N.R.C. Aeronautical Report LR-366. Most of the tests were carried out with the fan inhaling from still air, but a little running was also done with crosswinds of up to 250 ft./sec. simulating the transition of the aircraft to normal forward flight. Test programmes on the effect of varying inlet bellmouth radius, rotor hub/tip diameter ratio, and number of rotor blades are described. Brief notes on rotor hub exit fairings, cross-wind operations, and blade twisting under load are included, and an appendix summarizes the performance of all the major build standards tested.
Publication date
PublisherNational Research Council Canada
Series
  • Aeronautical Report (National Research Council Canada. Division of Mechanical Engineering. Engine Laboratory), no. LR-367 (February 1962).
LanguageEnglish
Peer reviewedNo
NRC numberNRCC-0007275
NRC-7275
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Record identifier3b5a37c4-b2ca-4ef5-9ae8-4f6e151f7dd5
Record created2025-09-03
Record modified2025-11-03
Date modified: