New Britain herald., 1921-09-07
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 AERONAUTICAL LINE
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 Air Terms

waahtngton, Sept :. -- Standard apdonauticnl terms. devised and com oiled by the National Advisory Com Q inittee for Acronautics, have been of dciaIly prescribed for use in the Army and Navy. Hereafter. the new order states. the officers of the two air serv- iccs will use the regulation nomcncla turo!
 For some time. aerial experts point out, laymen have been calling any thnE that traverse the air an air ship" whereas the "aircroft' should be employed. They say. that all bal looms, rigid and non-rigid airships. or lighter than-air craft. are constai tlv termed "blimps." slang word LOW obsolete, but originally used to dcstg- nate a non-rigid airship, driven by an engine installed In an airplane fusel- age stuna bcheath tho gas bag. The word "hydroplano" has often been misuAcd in referring to a seaplanc. "hydroplane" dcsiEnates a sea-sled. witch planes on the surface of the water but does not take the air. An alrplane has been called an aero" which, tt ls explained. Is as wrong as ealing a boat n water" The words tsroplgne." 'yrdo-aoroplane.' and
 
 with and 'nirplane, 'seaplanc' and "a.'shlps" have taken their places.
 According to tho rocent published report of the National Advisory Com ln ttec, aircraft" constitutes any form of craft designed to navigate tho air aud Ia divided into "aerostats' and "HirpiRnen." Aerostats comprise light er-than aircraft. cmbodying a con ialnor hiled with a gas lighter than air, such as hydrogen. and sustained hy it's buoyancy. they include air ships" and "balloons.'
 The word "atrplane" is now used to dcatgnate craft heavier than air. ob- tanning their support from the action tF the air on the wings and driven through the air by screw propcllers. Tractors" are airplancs having thet' pt opeIiera in front. "pushems" having them in tho rear. Usually atrplanes nre equipped for land work with wheeled landing gear. but when fitted for aliRhttng on water with boat or gontoons. tho term "seaplanc" is used.
 "Airshipa." as the craft formerly known as tishterthan-air are no" called. are divided into three types. "riEid." whose form is maintained by a metallic frame within the gas bas or envelope. "non-riL d." whose en- Velopo Ia kopt taut by the pressure Gf the rontalncw gas. and 'scmo-rigid' ninintatned by n rigid or Jointed keel and also by gas pressure. These three types arc propelled by gas engines located In hull or car. or in indi- vidual engine houses suspended be- low tho supporting envelope, and con- trolled by means of rudders and fins.
 Balloons" tho second division of mo aerostat class, have no power pinnts nor means of controlling their horizontal flight. They include free" or flight balloons of the old style spherical type: captive" secured by a cable to the earth: "barrage." cap i've balloons used in forming an aer- ia' harrngc against nirplnne attacks: "Site," ionEated captive balloons such ns tho Cnauot observation balloon. which has tail fins 10 koep it headed Into tho wind; nurse" small, heav- fly fabricated balloon used for storing ELA and filling service balloons: and pilot" and sounding balloons em- pioycd In securing meteorological data.
 The heavier-than-nir types of nir- ninft now offisiaiiy termed "airplanes.' hrr divided Into seT Tsrai riassea accord Ine to tha number of pianss or wings. which ara usually suporiInposed.