| Australia 1970 (14 Jul) Space Cover Successful Euro.-Aust. Skylark B.5 Launch
|
|
|
| Australia 1970 (14 Jul) Space Cover Cachet "IMAGE SPACECRAFT LAUNCH" and SUCCESSFUL EUROPEAN - AUSTRALIAN/ SKYLARK B.5 LAUNCH/14.52 HRS. / PARTICIPATING: UNI LEICESTER, B.A.C., ELLIOTT BROS./W.R.E/ OBJECT: STUDY OF SOLAR CORONA/ ALTITUDE: APPROX. 120 MILES" with pencil address to Glenelg and affixed with 5c Cocos-Keeling) Islands stamp cancelled "WOOMERA/14JY70/SOUTH-AUST".The later Skylarks had an attitude control. Some experiments, especially the astronomical observations, required the instrument compartment to be detached from the rocket body late in flight, to be de-spun if necessary, and then held in a fixed attitude relative to the sun or stars. Elliott Bros and later Marconi worked with RAE to develop a series of attitude control systems which were remarkably successful. They depended on sensors which recognised the chosen celestial point and kept it fixed in their field of view by controlling the position of the head with small nitrogen jets. By 1965 the sun-pointing attitude control system was in frequent use, followed by a star-pointer in 1970. The pointing accuracy was within 30 seconds of arc.5 The data obtained by Skylark was usually telemetered to the ground, but in some cases—where photographs were taken, for example—the head returned gently to earth under a parachute. https://www.dst.defence.gov.au/sites/default/files/publications/documents/Fire%20Across%20the%20Desert.pdf Page 398.
|
 |
|
|
|
Item #: INV-130598
Condition Co
|
Pricing in AU$
|
|
Within Australia
A$
5.00
(inc GST 0.45 )
|
|
Outside Australia
A$ 4.55
(approx. US$3.05)
|
|
