New Britain herald., 1926-02-19
AVIATION SHOWS GREAT ADVANCES All Branches Are Progressing
 Rapidly

Dayton, O., Feb, 10 P-Aviation, both military and commercial has been advanced along several lines during the last year by experimenta- ton and research at the engineering division headquarters of the army air servica at McCook field.
 The developments have pertained 70 improvement ot metals and other materials used in airplane construc- ion. to moro economical airplane onstructlon, 10 Improvements in de- Ncns Of planes, and inventions and adaptations of accessories and methods in connection with aviation. says a report Of the years progress,
 The predominant trend in military aircraft development has been to- ward marked reduction in the number of types Of planes rcQuierd tor military purposes. Formerly fif- teen standard types of aircraft were considered necessary 10 properly mlnU all military functions. Today only five general types are required 70 accomplish the same purposes. The reduction was brought about hy designing aircraft in certain in- stances 10 perform two or more functions through interchangeable equipment.
 The five general types 10 which planes now conform 10 meet mili- ,ary requirements are: Pursuit. homhardmcur, observation, training and transport.
 The first plane built in 'ho United States exclusively for ambulance purposcs made its appearance dur ing thc year. T. arcomodates q pilot nfam surgeon and two patien's 'ne latter being carried in filters in tnc ruecl1go. Medical supplies are carried.
 practtcahiIity of the Looming am- nhihiau plane for land-water-alr use WAS proved by the MacMillan polar flight and the photographing tour in the Minnesota watershed region said tho report.
 New arccssoros developed turing the year included pneumatic landing shock ahsorbcrs and the airpane brake. The shock ahsorbcrs arc telo- snopinc cylinders containing oil and water. Tho brakes docrcas" Ky about oro-ihird the distance of roll on the ground after landing.
 Engine development has progress d toward its ultimate goal Of one bound per horse power. Nc" Wat"r- cooled engines weigh ono and small fraction pounds per horse- power. A yaIuHhlo contribution 10 flIis branch of air navigation vas ,na air-coolod Liberty engine,
 Bombing under conditions form oilv considered unfavorahlo both as n height and clarity of the a'mos- ,rcrc vas improved by a ne" homo sight. Effect results can no" U" obtained at a height of from IN."'" ,o oo,ooo feet, well above tho pres .ri actual danger zone of an't-air- .rar' guns,
 High powered in0and'SconI I'L ms arc hoou developed 'o s'ppian' ..erbon arrs in aerial h"aoons ar, ..,on,c nooIIi2h4 and lonlirE fold Ja"miu9'iou.
 Trrcc now Instruments, 'h" earth ndrcton romr"se. th" drift sight md tnr flight indicator ar" being perfected for cours" flying through socs and auoro clouds, \ s"nsi'iv" .lHmo'cr has hrn" developed for aiding in acr'al rho'orrohp work.
 Now aerjrl map-maEinE cameras navo bocn iu,"n'od and developed. Hight acrj"l pictures arc no" b"in" .9%en win ',r ojl Of f."eali"h' powder dropped from plon"e. Nap- niog of air mail lano@ and Nho'o- .:raphjn- of vrr,onl'"rm fields for ,rop reports las hs"n successfully undertaken. $