Preliminary Model Tests of a Wing-Duct Cooling System for Radial Engines, Special Report

One of 111 reports in the series: NACA Special Reports available on this site.

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Description

Wind-tunnel tests were conducted on a model wing-nacelle combination to determine the practicability of cooling radial engines by forcing the cooling air into wing-duct entrances located in the propeller slipstream, passing the air through the engine baffles from rear to front, and ejecting the air through an annular slot near the front of the nacelle. The tests, which were of a preliminary nature, were made on a 5-foot-chord wing and a 20-inch-diameter nacelle. A 3-blade, 4-foot-diameter propeller was used. The tests indicated that this method of cooling and cowling radial engines is entirely practicable providing the wing of the prospective ... continued below

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Biermann, David & Valentine, E. Floyd February 1, 1939.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 130 times . More information about this report can be viewed below.

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  • Main Title: Preliminary Model Tests of a Wing-Duct Cooling System for Radial Engines, Special Report
  • Series Title: NACA Special Reports

Description

Wind-tunnel tests were conducted on a model wing-nacelle combination to determine the practicability of cooling radial engines by forcing the cooling air into wing-duct entrances located in the propeller slipstream, passing the air through the engine baffles from rear to front, and ejecting the air through an annular slot near the front of the nacelle. The tests, which were of a preliminary nature, were made on a 5-foot-chord wing and a 20-inch-diameter nacelle. A 3-blade, 4-foot-diameter propeller was used. The tests indicated that this method of cooling and cowling radial engines is entirely practicable providing the wing of the prospective airplane is sufficiently thick to accommodate efficient entrance ducts , The drag of the cowlings tested was definitely less than for the conventional N.A.C.A. cowling, and the pressure available at low air speed corresponding to operation on the ground and at low flying speeds was apparently sufficient for cooling most present-day radial engines.

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  • URL: http://hdl.handle.net/2060/20090015242 External Link
  • Report No.: NACA-SR-101
  • Center for AeroSpace Information Number: 20090015242
  • Archival Resource Key: ark:/67531/metadc65128

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

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Creation Date

  • February 1, 1939

Added to The UNT Digital Library

  • Nov. 17, 2011, 5:13 p.m.

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  • Nov. 30, 2016, 12:44 p.m.

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Biermann, David & Valentine, E. Floyd. Preliminary Model Tests of a Wing-Duct Cooling System for Radial Engines, Special Report, report, February 1, 1939; (digital.library.unt.edu/ark:/67531/metadc65128/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.