NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A flying superconducting magnet and cryostat for magnetic suspension of wind-tunnel modelsThe engineering practicality of a persistent high-field superconducting solenoid cryostat as a magnetic suspension and balance system (MSBS) for wind-tunnel testing of aircraft and missile models is examined. The test apparatus is a simple solenoid of filamentary NbTi superconductor with a cupronickel matrix. The apparatus, with a length-to-diameter ratio of 6 to 1 and a radius of 32 mm, used a 0.25 mm wire with a critical current of 27 A in an external field of 6 T. The total heat inleak of 150 mW was achieved. Helium boiloff rates were tested over a range of operating conditions, including pitch attitudes from 10 deg nose down to 90 deg nose up; the rate was estimated as low, but the aerodynamic acceptability of venting gaseous helium has not been determined. It is shown that the effectiveness of the concept increases with increasing scale, and performance in excess of that of conventional ferromagnets is achievable with reduction in size and costs, and with aptness to transonic wind-tunnel testing. Detailed specifications and schematics are included.
Document ID
19850036947
Document Type
Reprint (Version printed in journal)
Authors
Britcher, C. (Southampton Univ. United Kingdom)
Goodyer, M. J. (Southampton Univ. United Kingdom)
Scurlock, R. G. (Southampton Univ. United Kingdom)
Wu, Y. Y. (Southampton, University Southampton, United Kingdom)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: Cryogenics
Volume: 24
ISSN: 0011-2275
Subject Category
RESEARCH AND SUPPORT FACILITIES (AIR)
Funding Number(s)
CONTRACT_GRANT: NSG-7523
Distribution Limits
Public
Copyright
Other