An investigation of cowlings for long-nose radial engines was made on the Curtiss XP-42 fighter in the NACA full-scale wind tunnel. The unsatisfactory aerodynamic characteristics of all the cowlings with scoop inlets tested led to the development of the annular high-velocity inlet cowlings. Tests showed that ratio of cooling-air velocity at cowling inlet to stream velocity should not be less than 0.5 for this type of cowling and that critical compressibility speed can be extended to more than 500 mph at 20,000 ft altitude.
Development of Cowling for Long-nose Air-cooled Engine in the NACA Full-scale Wind Tunnel
1941-10-01
Miscellaneous
No indication
English
Aerodynamics , WIND TUNNEL TESTS (NACA-FULL-SCALE) (EXPER ) (AMER ) , DRAG REDUCTION-CURTISS P-42 , FLAPPED , PRESSURE DISTRIBUTION-PROPELLER SPINNERS , ENGINE COWLINGS-NACA , AIR FLOW-ENGINE COWLINGS , AIRPLANES-CURTISS P-42 (PURSUIT) , SCOOPS , HIGH-INLET-VELOCITY (LONG-NOSE) , PRESSURE DISTRIBUTION-ENGINE COWLINGS
Development of cowling for long-nose air-cooled engine in NACA full-scale wind tunnel
Engineering Index Backfile | 1941
|Full-Scale Tests of a New Type NACA Nose-Slot Cowling
NTRS | 1937
|Emerald Group Publishing | 1934
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