Myasishchev M-18
The Myasishchev M-18 was a design for a Soviet supersonic bomber with a variable-geometry wing.
The project was dropped in favour of the Tupolev Tu-160 program. Although the design was the most successful when competing with the Tu-160 and Sukhoi T-4, it was dropped as Tupolev had the most potential to go ahead with the supersonic bomber project.
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M18
M18 or M-18 may refer to:
M-18 (Michigan highway)
M-18 is a north–south state trunkline highway in the Lower Peninsula of the US state of Michigan. It runs for 77.530 miles (124.772 km) through the central region of the state connecting US Highway 10 (US 10) near North Bradley with M-72 in rural Crawford County near the community of Luzerne. In between, the roadway connects several smaller communities while running through woodlands in both state and national forest areas. Two segments of M-18 run along sections of county boundaries, and one part of the highway forms a component of the business loop for the village of Roscommon.
When the highway was first designated in the late 1910s, it extended farther south than it does today and ended well short of its current northern terminus. The southern end was added to another state highway, truncating M-18's length to roughly its current southern terminus in 1926. The northern end was also simultaneously extended for the first time with these revisions to the highway's routing. In the 1940s, the northern extension was reversed and then reinstated. M-18's course was last changed with the opening of three different freeways in the area in the 1960s and 1970s. The last extension in 1973 supplanted he M-144 designation from Roscommon north to Luzerne.
M18 Hellcat
The M18 Hellcat (also known as the M18 Gun Motor Carriage , M18 GMC) was an American tank destroyer of World War II, used in the Italian and European theatres, and in the Korean War. It was the fastest armored vehicle in the American defense inventory of the 20th century, until the turboshaft-powered M1 Abrams heavy main battle tank appeared decades later. Even though most sources list the M1 Abrams with a top speed of only 45 mph (governed speed), leaving the Hellcat with a superior paved-road top operating speed. The speed was attained by keeping armor to a minimum, no more than one inch thick and roofless, open-top turrets (a standard design feature for all American fully tracked tank destroyers of World War II) and by powering the relatively small vehicle with a radial engine originally designed for aircraft usage. The Hellcat, along with the M4 Sherman-based M10 Wolverine and the highly effective, 90mm gun-armed M36 tank destroyer, provided American and Allied forces with a respectable mobile anti-tank capability against the newer German armored types. Despite being armed with an only partially effective 76 mm cannon, it performed well.
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