Powerful

Shrouded in mystery were the British planes and motors, entrants in last autumn's Schneider Cup Race on the Solent (TIME, Sept. 16). Even after the Royal Air Force astounded the world by winning the race at 328 m. p. h. and later smashing all speed records by flying 357.7 m. p. h. on a three-kilometer closed course at Calshot, little was known of the Rolls-Royce engine used.

In the U. S., those interested presumed its power to be somewhere near that of Packard Co.'s mightiest, a 24-cylinder X-type engine, producing 1,250 h. p. No airplane engine was known to be more powerful. The Rolls-Royce engine was of the W-type, better known as Broad Arrow, a conventional British design used in the Napier engine to whoop Sir Henry O'Neil de Hane Segrave in his queer record-breaking motorcar over the sands at Daytona Beach at 231 m. p. h. last year.

Last week, England's Air Ministry revealed that its Rolls-Royce engine developed over 1,900 h. p., for 1,530 lbs; of weight, about five-sixths of a lb. per h. p.*

*The new Hudson type of locomotive used by the New York Central Railroad, to haul its 20th Century Limited, develops 4.075 h. p., weighs 630,300 lbs., about 150 lbs. per h. p.

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