| 单词 | main wheel |
| 释义 | > as lemmasmain wheel main wheel n. (a) the first, or driving, wheel in a series of gears, esp. in a clock or watch; (b) Aeronautics each of the wheels which are located near the centre of an aeroplane and bear most of its weight when it is on the ground, as distinguished from a nose or tail wheel. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear cog-wheel1416 main wheel1678 spur-wheel1731 rack wheel1772 spur gear1808 gear1829 gearing1833 spur gearing1844 pitch wheel1854 tooth-wheel1862 gear-wheel1874 maintaining wheel1874 cog1883 1678 J. Moxon Mech. Exercises I. iii. 47 The Tumbler is so placed..that while the Jack line is winding up upon the Barrel its round britch passes forwards by all the Crosses of the Main wheel... But when the Barrel is turned the contrary way,..the Tumbler..thrusts the Main Wheel about with [it]. 1852 C. Tomlinson Cycl. Useful Arts (1854) II. 25/2 As the great or main wheel which communicates motion to all the rest in the watch or chronometer, is attached to the fusee, their centres of motion coinciding with each other, it follows that the power at the teeth of the main wheel is perfectly uniform. 1959 F. D. Adams Aeronaut. Dict. 104/1 ‘Landing gear’ includes all supporting components, such as the tail wheel or tail skid, outrigger wheels or pontoons, etc., but the term is often conceived to apply only to the principal components, i.e., to the main wheels, floats, etc., and the nose gear, if any. 1962 E. Bruton Dict. Clocks & Watches 84 Great Wheel, the main wheel of a fusee clock or watch. 1993 Flyer July 63/2 Even nosewheel aircraft are supposed to arrive on the ground in the tail-down attitude so that the wheel up front may be lowered gently onto the airfield, thus reducing the angle of attack and firmly gluing the mainwheels to the runway. < as lemmas |
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