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1945 - H.M. Hleva at controls of new, light, two-place Sikorsky helicopter and operating Bendix  Flightphone


CD 1967054 E&MP106.193


July 2, 1945

H.M. Hleva, of Sikorsky Helicopter experimental engineering department, at controls of new, light, two-place Sikorsky helicopter and operating "Bendix Flightphone" VHF transmitter and MF receiver installation at the National Aircraft Show.


A new two-piece Sikorsky Helicopter officially designated as S-52, which was unveiled at the National Aircraft Show at Cleveland, was designed for utility, low gross weight, and high useful load, even to the radio equipment.

Outstanding features of the new model which attracted the attention of thousands during the Cleveland Show, who dubbed it "The Honeymoon Special", include a gross design weight of only 1,750 lbs., a 650-lb. Useful load capacity, a Bendix Radio FLIGHTPHONE VHF transmitter and MF receiver, with a built-in speaker, and all-metal rotor blades, the first specified as standard equipment on a military or commercial helicopter.

Shown by the Sikorsky Aircraft Division of United Aircraft Corporation, it is the sixth in the service of service-proved Sikorsky helicopters.

The S-52 will cruise at 85 to 90 miles per hour, and at a top speed will travel at better than 100 miles an hour.

Rate of climb at sea level at 40 miles an hour is 1500 feet per minute.

It will hover at 6000 feet without ground effect.

While particularly suitable for military liaison and patrol work, the S-52's performance makes it attractive for numerous other specialized applications.

The Bendix Radio installation shown in the model at the Show increases the utility of this new 2-place helicopter.

Utilizing the new VHF (Very High Frequency) 122 mc channel recently permanently allocated by the Federal Communications Commission, this small transceiver permits air-to-ground transmission to airport control towers and CAA communications stations and furnishes all-weather transmission over distances of 75 miles or more, depending upon altitude, and above all, eliminates atmospheric static.

Providing maximum performance with minimum weight, the advantages of this new Bendix FLIGHTWEIGHT Radio add up to virtually a conception of radio transmission for private flyers just as the newest Sikorsky helicopter's minimum gross design weight and maximum useful load improves previous performance for aircraft of this class by considerable margin. 

Original Caption by Science Service
Bendix Radio

National Museum of American History


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