auxiliary envelope
51Paramagnetism — is a form of magnetism which occurs only in the presence of an externally applied magnetic field. Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability greater than one (or, equivalently, a positive… …
52Ramjet — A ramjet, sometimes referred to as a stovepipe jet, or an athodyd, is a form of jet engine that contains no major moving parts. Unlike most other airbreathing jet engines, ramjets have no rotary compressor at the inlet, instead, the forward… …
53Supermarine Spitfire — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =The distinctive silhouette of a typical Spitfire shows elliptical wings. (P7350, a Mk IIa, was first delivered to 266 Squadron on 6 September 1940.) designer =R. J.… …
54Lockheed U-2 — U 2 A Lockheed TR 1 in flight Role High altitude reconnaissance Manufacturer …
55Zilog Z80 — One of the first Z80 microprocessors manufactured; the date stamp is from June 1976. Produced 1976 Common manufacturer(s) Zilog …
56B-29 Superfortress — Infobox Aircraft name = B 29 Superfortress type = Strategic bomber manufacturer = Boeing caption = A USAAF B 29 Superfortress first flight = 21 September 1942 introduced = 8 May 1944 retired = 21 June 1960 status = Scrapped except for those in… …
57Rectifier — A rectifier is an electrical device that converts alternating current (AC) to direct current (DC), a process known as rectification. Rectifiers have many uses including as components of power supplies and as detectors of radio signals. Rectifiers …
58U.S. Air Force Thunderbirds — Infobox Military Unit unit name= Thunderbirds 57th Wing United States Air Force caption=The Thunderbirds lined up at Nellis AFB, Las Vegas, Nevada dates= June 1, 1953 to the Present country= allegiance= branch= type= role= Aerobatic display team… …
59Severe acute respiratory syndrome — SARS redirects here. For other uses, see SARS (disambiguation). Further information: Progress of the SARS outbreak Severe Acute Respiratory Syndrome Classification and external resources SARS coronavirus (SARS CoV) is causative of the syndrome …
60Inverter (electrical) — An inverter is an electrical device that converts direct current (DC) to alternating current (AC)[1]; the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Solid… …
