Stability and control characteristics determined from tests in the Langley 19-foot pressure tunnel of a 0.2375-scale model of the Douglas XA-26 airplane are compared with those measured in flight tests of a Douglas A-26b airplane. Several designs of nitrided-steel piston rings were performance-tested under variable conditions of output. The necessity of good surface finish and conformity of the ring to the bore was indicated in the preliminary tests. Nitrided-steel rings of the same dimensions as cast-iron rings operating on the original piston were unsatisfactory, and the final design was a lighter, rectangular, thin-face-width ring used on a piston having a maximum cross-head area and a revised skirt shape. Results were obtained from single-cylinder and multicylinder engine runs.
Nitrited-Steel Piston Rings for Engines of High Specific Power
1945-01-01
Miscellaneous
No indication
English
Nitrided-steel piston rings for engines of high specific power
Engineering Index Backfile | 1944
|Internal Combustion Engines--Piston Rings--Steel Rectangular Rings
SAE Technical Papers | 2008
INTERNAL COMBUSTION ENGINES—PISTON RINGS—STEEL RECTANGULAR RINGS
SAE Technical Papers | 1998
Nitrited Steel Piston Rings for Internal Combustion Engines
SAE Technical Papers | 1994
|INTERNAL COMBUSTION ENGINES - PISTON RINGS - RECTANGULAR RINGS
SAE Technical Papers | 1989