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A New Method for Calculating the Climbing speeds of Aeroplanes of Great Climbing Capacity

Published online by Cambridge University Press:  28 July 2016

G. Otten
G. Otten*
Affiliation:
Royal Dutch Air Force in Dutch East Indies
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Extract

For the calculation of the climbing speeds of aeroplanes several methods are in use, which, as is well known, do not yield quite accurate results when applied to machines with great climbing capacities, and give rise to inaccuracies which become of greater importance with increasing climbing capacity of the plane. The climbing speed, up to the present, has not been great in respect to the forward speed used when climbing, so that for the calculation of the climbing speeds the method fairly generally used and described in the “Handbook of Instructions for Airplane Designers, ”from the U.S. Army Air Service, could be used without serious objections. It has, however, been found desirable to look for a better method for calculating the climbing speeds, owing to increasing engine powers accompanied by decreasing drag coefficients of the aeroplanes, as well as to the introduction of variable pitch airscrews.

Type
Research Article
Information
The Aeronautical Journal , Volume 39 , Issue 290 , February 1935 , pp. 133 - 142
Copyright
Copyright © Royal Aeronautical Society 1935

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References

Note on page 1 * 1 h.p. =75 kg.m. 133

Note on page 137 * Prof.von Mises, Dr. R., “Fluglehre,” Berlin, 1933, p. 330 CrossRefGoogle Scholar.

Note on page 137 † As a matter of fact, “curve I” applies to horizontal flight only and for each climbing angle b differing from zero a separate curve should be drawn. However, because we are chiefly concerned with climbing angles of less than 10°, and cos 10° is still 0.985, it will be obvious that the maximum amount of the error will be l.S per cent., and that the whole set of “ curves I ” will be confined to an area of some tenth part of a millimetre wide.

Note on page 139 * Devillers, R., “Le Moteur k Explosions,” Tome II, p. 820.Google Scholar