Full Scale Drag Tests on Various Parts of Fairchild (FC-2W2) Cabin Monoplane Page: 4 of 26
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N.A.C.A. Technical Note No. 340
the landing gear with both types of wheels attached and obtain
an indication of their relative aerodynamic merits.
Methods and Apparatus
The Fairchild (FO-2W2) airplane is a cabin monoplane (Fig.
1) with accommodations for four passengers and a pilot. It
has an over-all length of 32 ft. 10-1/4 in., span of 50 ft.,
chord of 7 ft., split-axle type oleo landing gear, and a 425 hp
9-cylinder radial air-cooled Pratt and Whitney "Wasp" engine.
The airplane was mounted on the balance (Fig. 2) in the
tunnel test chamber with its thrust line horizontal and in the
center of the air stream. Due to the nature of the support-
ing arrangement which attached to the axles, it was found nec-
essary to use dummy wooden wheels with cut-outs for the struts
to the axles instead of the service wheels.
The factors investigated and described are as follows:
1. Drag due to the tail surfaces.
2. Drag due to the engine.
3. Effect on the drag of the airplane of adding a
4. Drag of bare fuselage with nose faired.
5. Effect on the drag of the airplane of opening the
6.. Drag due to the landing gear with both 13-inch by
30-inch Musselman wheels, and 8-inch by 36-
inch standard wheels.
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Hernstein, William H., Jr. Full Scale Drag Tests on Various Parts of Fairchild (FC-2W2) Cabin Monoplane, report, May 1930; (digital.library.unt.edu/ark:/67531/metadc54073/m1/4/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.