单词 | ballonet |
释义 | ballonetn. A separate gas- or air-filled compartment or small balloon within the main envelope of a balloon or airship, esp. one designed for the maintenance or adjustment of the envelope's shape, buoyancy, or orientation. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > balloons and airships > [noun] > gas or air container of balloon or airship balloonet1838 gasbag1852 ballonet1869 air vessel1870 envelope1901 1869 W. A. Fraser Coila's Whispers 21 The Nassau's a bubble, Its size I will double, Silk, cordage, and car in proportion; And a Ballonette there, Au dessous de sa mère, We will hang as a measure of caution. 1901 Times 9 Aug. 3/4 The Santos Dumont balloon carries in its front portion a ballonet, or pocket, which is filled automatically by a ventilator driven by the motor. 1903 Daily Chron. 21 Sept. 3/6 In the central compartment is an internal air balloon, or ballonnette. 1915 Sphere 6 Feb. 152/1 At high altitudes the ballonettes [of the zeppelin] leak, and the covering does not by any means wholly retain the hydrogen. 1916 C. C. Turner Aircraft of To-day xiii. 203 All non-rigid and semi-rigid airships are provided with ballonnets. 1920 Flight 12 663/2 In Italy the British method of supplying air to the ballonets through airscoops fitted in the slipstream of the propellers is never used. 1985 N.Y. Times (Nexis) 6 Aug. 3/1 The ballonets also act like ballast in a ship, and pilots can help control an airship's attitude by shifting air to the front or back. 2003 New Yorker 9 June 69/2 The envelope contains a central helium balloon, along with fore and aft airbags, or ballonets, which help control the ship's pitch. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021). < n.1869 |
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