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March 25, 1957

SAFETY

Pilot Describes Stratocruiser Ditching

Air Transport

Douglas Proposes Replacement for Dc-3

AERONAUTICAL ENGINEERING

Naca Models Seek Critical Spin Answers

132133

SAFETY

Pilot Describes Stratocruiser Ditching

The emergency landing last Oct. 16 of PAA Stratocruiser N90943 beside the Coast Guard vessel Ponchartrain halfway between Honolulu and San Francisco has aroused much interest throughout the various pilot groups, and it is appropriate to set forth the story from the pilot’s standpoint, and to detail what was learned and what might be suggested in the way of changes in our emergency equipment*and technique to improve our ability to perform in possible future emergencies.
3839

Air Transport

Douglas Proposes Replacement for Dc-3

High-wing, four-turboprop transport proposed for local carriers; production hinges on reception.

5051

AERONAUTICAL ENGINEERING

Naca Models Seek Critical Spin Answers

Langley Field, Va.—Increasingly critical problems of spin in high performance aircraft may lead to automatic controls designed to keep incipient spin from becoming a violent maneuver. Although free-flight models have been used in a variety of ways for more than 20 years by researchers at the National Advisory Committee for Aeronautics’ Langley Aeronautical Laboratory, their importance in the exploration of incipient spin has forced development of new techniques for their use outside spin tunnels.

116117

BUSINESS FLYING

Contract F-51 Gathers Tornado Data

New York—Civilian-owned F-51D flown under contract with the Weather Bureau has begun to fill in gaps in understanding of squall line and tornado formation, and promises to pay benefits in lives saved in the Midwest “tornado alley." Besides soundings made of severe local storm situations where tornadoes were forecast to form, the project has provided observations of general interest to pilots.
9293

EQUIPMENT

Timer System Warns of Engine Failure

New York—Sudden gas turbine engine failures due to accumulated overtemperatures melting the hot parts of an engine can be forestalled by a maintenance device developed by Avien Inc.. Woods ide, L. I. The new system uses a scries of stop clock timers which add up the intervals that the engine has been subjected to various levels of overtemperature.

124125

FINANCIAL

Stock Transactions

Washington—Acquisition of 35,502 common shares of Slick Airways Inc. Stock by Earl F. Slick, director and beneficial owner, has been reported bY Securities and Exchange Commission. Slick’s total holding is now 173,283 shares, with Slick Oil Co., a beneficial owner, holding 7,200 shares.
158159

Letters

Rascal Mount I have appreciated your magazine for many years. In my opinion, it is the best aviation magazine published in the United States. And, in particular, your cover photo —each one a masterpiece. However, I would like to bring to your attention the write-up on your Feb. 18 cover.
2627

MISSILE ENGINEERING

Army Partisans Challenge Wilson; Denounce Irbm, Aviation Edicts

100101

EQUIPMENT

New Aviation Products

Compass Shield Fernetic shield around weather radar magnetron eliminates need to recompensate magnetic compass whenever radar is pulled for check or replacement. Result is lower maintenance cost and time. Shielding is not affected by shock or vibration because fernetic material does not retain residual magnetism or require periodic annealing.
8889

EQUIPMENT

Usaf Tests Flashing Approach Lights

March Air Force Base, Calif.—Enthusiasm appears high for the new Electronic Flash Approach System now under evaluation at March Air Force Base, initial construction has begun on another EFAS system at Dow Air Force Base, Me., which is expected to be completed in early summer.

March 181957 April 11957