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Wall Art and Photo Gifts from Mary Evans Picture Library
13885217
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32337720
© Aviation Ancestry
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VISUAL DESCRIPTION
This is an advertisement for the Sperry Electric Gyro Horizon, Type HL. 3, showcasing its features and specifications against a backdrop of aerial imagery. The ad highlights the instrument's reliability in maintaining accurate altitude readings even at high altitudes where A. C. power supply is unstable, as well as its ability to operate within a wide temperature range from -10°C to +70°C. The gyro horizon boasts precision with minimal friction oscillation and promises shorter calibration periods due to its refined construction and design. It emphasizes accuracy through a high-speed rotor and very sensitive reaction system that provides increased accuracy. For aerobatic maneuvers, this instrument can handle freedom in roll and yaw angles up to 360 degrees without toppling over. Additionally, it is designed to withstand the rigors of high-speed maneuvers up to G forces of 6G without damage. The advertisement states that this model has been specified on all new British transport aircrafts (at the time) and represents the latest in instrumentation as it is approved by both Royal Air Force (RAF) Recognition Panel for use in RAF aircrafts and Civil Aviation Authority (CAA). It also mentions that production has begun at Sperry's factory located at Brentford, Middlesex. At the bottom right corner of the image lies Sperry's logo along with contact information for The Sperry Gyroscope Company Ltd. , including their address in Great West Road, Brentford, Middlesex—and their phone number listed as Ealing 8771 (80 lines). Overall, this vintage advertisement conveys technical sophistication aimed at aviation professionals seeking reliable flight instruments during an era when such technology was critical for navigation and safety.
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