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  2. Clearance (civil engineering) - Wikipedia

    en.wikipedia.org/wiki/Clearance_(civil_engineering)

    In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.

  3. Douglas DC-6 - Wikipedia

    en.wikipedia.org/wiki/Douglas_DC-6

    Similar to the DC-6A, the military version was the USAF C-118 Liftmaster; the USN R6D version used the more powerful R-2800-CB-17 engines. These were later used on the commercial DC-6B to allow international flights. [4] The R6D Navy version (in the late 1950s and early 1960s) had Curtiss Electric constant-speed reversing propellers. [citation ...

  4. Chamberlain Group - Wikipedia

    en.wikipedia.org/wiki/Chamberlain_Group

    Chamberlain, LiftMaster, and Craftsman have interchangeable parts, primarily the gear and circuit boards. The greatest difference between the brands is that Chamberlain and Craftsman operate on a square shaped split-rail system, while LiftMaster consists of one single solid piece of inverted t-shaped rail.

  5. List of accidents and incidents involving the Douglas DC-6

    en.wikipedia.org/wiki/List_of_accidents_and...

    Douglas DC-6B of Swiss airline Balair in 1976. The Douglas DC-6 is a piston-powered airliner and transport aircraft built by the Douglas Aircraft Company from 1946 to 1958. . Originally intended as a military transport near the end of World War II, it was reworked after the war to compete with the Lockheed Constellation in the long-range commercial transport

  6. Minimum obstacle clearance altitude - Wikipedia

    en.wikipedia.org/wiki/Minimum_obstacle_clearance...

    The MOCA seen on the NACO en route chart, may have been computed by adding the required obstacle clearance (ROC) to the controlling obstacle in the primary area or computed by using a TERPS chart if the controlling obstacle is located in the secondary area. This figure is then rounded to the nearest 100 foot increment, i.e. 2,049 feet becomes ...

  7. Loading gauge - Wikipedia

    en.wikipedia.org/wiki/Loading_gauge

    The clearance space between a train and the tunnel is often small. Pictured is a London Underground Northern line 1995 Stock train emerging from the tunnel north of Hendon Central station . A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads.

  8. Structure gauge - Wikipedia

    en.wikipedia.org/wiki/Structure_gauge

    Eurocode 1: Actions on structures has a definition of "physical clearance" between roadway surface and the underside of bridge element. The code also defines the clearance that is shorter than the physical clearance to account for sag curves, bridge deflection and expected settlements with a recommendation of minimum clearance of 5 metres (16 ft 5 in). [2]

  9. Engineering fit - Wikipedia

    en.wikipedia.org/wiki/Engineering_fit

    Engineering fits are generally used as part of geometric dimensioning and tolerancing when a part or assembly is designed. In engineering terms, the "fit" is the clearance between two mating parts, and the size of this clearance determines whether the parts can, at one end of the spectrum, move or rotate independently from each other or, at the other end, are temporarily or permanently joined.