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Analysis of V-G Records From the SNJ-4 Airplane

Description: Report discusses an attempt to adapt a method of analysis of V-G data to predict the occurrences of large values of airspeed and acceleration from an SNJ-4 airplane; the data are presented as "flight envelopes". The flight envelopes "predict that, on average, in a stated number of flight hours, one airspeed, one positive acceleration, and one negative acceleration will exceed the envelope with equal probability of the accelerations being experienced at any airspeed" (from Discussion). The analy… more
Date: December 1945
Creator: Wilkerson, M. & Bennett, S. A.
Item Type: Refine your search to only Report
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Laboratory Investigation of Icing in the Carburetor and Supercharger Inlet Elbow of an Aircraft Engine 1: Description of Setup and Testing Technique

Description: Report discussing icing and de-icing of the carburetor and supercharger inlet of typical aircraft engine induction systems. A description of the systems used to control and simulate different conditions is provided.
Date: December 1945
Creator: Mulholland, Donald R.; Rollin, Vern G. & Galvin, Herman B.
Item Type: Refine your search to only Report
open access

Laboratory Investigation of Icing in the Carburetor and Supercharger Inlet Elbow of an Aircraft Engine 2: Determination of the Limiting-Icing Conditions

Description: "The carburetor and engine-stage supercharger assembly of a fighter aircraft were laboratory-tested to determine the icing characteristics of the induction system under three simulated engine power conditions with varying carburetor-air temperature, relative humidity, simulated-rain injection, rain and fuel temperature, fuel-air ratio, and fuel of different distillation characteristics" (p. 1).
Date: December 1945
Creator: Essex, Henry A.; Keith, Wayne C. & Mulholland, Donald R.
Item Type: Refine your search to only Report
open access

Laboratory Investigation of Icing in the Carburetor and Supercharger Inlet Elbow of an Aircraft Engine 3: Heated Air as a Means of De-Icing the Carburetor and Supercharger Inlet Elbow

Description: Report discussing the use of a twin-barrel injection carburetor and a supercharger inlet elbow to establish the relation between wet- and dry-bulb temperatures of the de-icing air and time required to recover from air-flow loss due to icing. The tests were performed at several power conditions, icing conditions, temperatures, and dry and humidified air. De-icing time was found to be a function of the nature of the ice formation and of the wet-bulb temperature of the de-icing air.
Date: December 1945
Creator: Lyons, Richard E. & Coles, Willard D.
Item Type: Refine your search to only Report
open access

Laboratory Investigation of Icing in the Carburetor and Supercharger Inlet Elbow of an Aircraft Engine 5: Effect of Injection of Water-Fuel Mixtures and Water-Ethanol-Fuel Mixtures on the Icing Characteristics

Description: Report discussing the effects of internal coolants injected with fuel on the icing characteristics of a twin-barrel injection carburetor mounted on an engine-stage supercharger assembly. The tests were made at conditions that simulated war emergency power and at a variety of water-fuel ratios, carburetor-air temperatures, and carburetor-air relative humidities.
Date: December 1945
Creator: Renner, Clark E.
Item Type: Refine your search to only Report
open access

Process of Lead-Deposit Accumulations on Aircraft-Engine Spark Plugs

Description: Report discussing an investigation of the progressive accumulation of load deposits on spark plugs under nonvarying operating conditions. Deposit-weight determinations and photographic observations are presented, and the specific characteristics of deposit accumulation are described.
Date: December 1945
Creator: Sloop, J. L.; Kinney, George R. & Rowe, William H.
Item Type: Refine your search to only Report
open access

Two-dimensional wind-tunnel investigation of 0.20-airfoil-chord plain ailerons of different contour on an NACA 65(sub 1)-210 airfoil section

Description: Report presenting an investigation of three interchangeable sealed-gap 0.20-airfoil-chord plain ailerons of different contour on the NACA 65(sub 1)-210 airfoil section. The three aileron contours tested were the true airfoil contour, straight sides, and a beveled trailing edge. Results regarding the aileron effectiveness, aileron hinge moments, lift, pitching moment, and drag are provided.
Date: December 1945
Creator: Underwood, William J.; Braslow, Albert L. & Cahill, Jones F.
Item Type: Refine your search to only Report
open access

Wind-Tunnel Investigation of Alternative Propellers Operating Behind Deflected Wing Flaps for the XB-36 Airplane

Description: Report discussing testing on the aerodynamic characteristics of two pusher propellers with the same plan form but different airfoil sections behind a slotted flap on the XD-36 airplane. Testing was carried out over the range of blade angles and flap deflections necessary to cover all flight conditions. The effects of flaps and of tip Mach number are described in detail.
Date: December 1945
Creator: Boxer, Emanuel
Item Type: Refine your search to only Report
open access

Tests of an Attack-Type Airplane in the Ames 40- by 80-Foot Wind Tunnel to Improve the High-Speed Maneuvering Control-Force Characteristics

Description: Report discussing testing on a twin-engine airplane to determine which modifications would make it suitable for ground-support attack operations. Some of the suggested modifications include replacing fabric-covered elevators with metal-covered elevators with a balance tab, replacing fabric-covered ailerons with metal-covered ailerons with a balance tab, sealing the airplane, fairing the nose guns, removing the lower-periscope deflector, and fairing the bomb racks. The results of other types of … more
Date: November 1945
Creator: McCormack, Gerald M.
Item Type: Refine your search to only Report
open access

A Flight Investigation of the Ice-Prevention Requirements of the United States Naval K-Type Airship

Description: Report discussing a research program to investigate ice prevention and elimination on airships in order to develop suitable airship ice-prevention equipment. A Naval K-type airship was equipped with photographic and meteorological tools in order to record ice formation and the propellers were outfitted with electrically heated blade shoes. Testing discovered that an airship can be flown successfully in wet snow and freezing rain with only the propellers and induction systems protected from the … more
Date: October 19, 1945
Creator: Hillendahl, Wesley H.
Item Type: Refine your search to only Report
open access

Aerodynamic Characteristics of a 1/8-Scale Powered Model of a High-Speed Bomber With a Dual Pusher Propeller Aft of the Empennage

Description: Report presenting wind-tunnel tests made to determine the aerodynamic characteristics of a scale model of a high-speed bomber with a dual pusher propeller aft of the empennage. Some of the results discussed include longitudinal, lateral, and directional stability and control, the empennage design, and ground effects on the aerodynamic characteristics. The results indicate that this particular airplane has several advantages with regard to stability and control over the conventional-type single-… more
Date: October 12, 1945
Creator: Weiberg, James A. & Schnurbusch, Alfred W.
Item Type: Refine your search to only Report
open access

Correlation of the Characteristics of Single-Cylinder and Flight Engines in Tests of High-Performance Fuels in an Air-Cooled Engine 2 - Knock-Limited Charge-Air Flow and Cylinder Temperatures

Description: An investigation was conducted to correlate the knock limited performance of flight and single-cylinder engines under a variety of operating conditions.
Date: October 12, 1945
Creator: Brown, Kenneth D.; Richard, Paul H. & Wilson, Robert W.
Item Type: Refine your search to only Report
open access

Correlation of the Characteristics of Single-Cylinder and Flight Engines in Tests of High-Performance Fuels in an Air-Cooled Engine 1 - Cooling Characteristics

Description: Variable charge-air flow, cooling-air pressure drop, and fuel-air ration investigations were conducted to determine the cooling characteristics of a full-scale air-cooled single cylinder on a CUE setup. The data are compared with similar data that were available for the same model multicylinder engine tested in flight in a four-engine airplane. The cylinder-head cooling correlations were the same for both the single-cylinder and the flight engine. The cooling correlations for the barrels differ… more
Date: October 4, 1945
Creator: Wilson, Robert W.; Richard, Paul H. & Brown, Kenneth D.
Item Type: Refine your search to only Report
open access

Endurance Tests of a 22-Inch-Diameter Pulse-Jet Engine With a Neoprene-Coated Valve Grid

Description: Report discussing the results of testing to determine the operating life of a 22-inch-diameter pulse-jet engine equipped with a neoprene-coated valve grid. The valve grid was found to extend the operating life and only reduced the performance slightly.
Date: October 3, 1945
Creator: Manganiello, Eugene J.; Valerino, Michael F. & Breisch, John H.
Item Type: Refine your search to only Report
open access

Sea-Level Performance Tests of a 22-Inch-Diameter Pulse-Jet Engine at Various Simulated Ram Pressures

Description: Report on sea-level performance tests of a 22-inch-diameter pulse-jet engine on a thrust stand. The tests were conducted at several ram pressures and the entire range of fuel flows that the engine can operate at. Information about the maximum-thrust operation, operating frequency, maximum combustion chamber pressures, and operating lives is provided.
Date: October 2, 1945
Creator: Manganiello, Eugene J.; Valerino, Michael F. & Essig, Robert H.
Item Type: Refine your search to only Report
open access

The effect of afterbody length of the hydrodynamic stability of a dynamic model of a flying boat: Langley tank model 134

Description: Report presenting some model tests that will be used to guide the relation of length of afterbody and depth of step. Results indicated that an increase in length of afterbody requires an accompanying increase in depth of step to maintain adequate landing stability.
Date: October 1945
Creator: Land, Norman S.
Item Type: Refine your search to only Report
open access

Flight Measurements of the Effect on Elevator Stick Forces of Stabilizer Incidence and Elevator Rib Spacing on the P-63A-1-BE Series Airplane

Description: "Flight tests were made to determine the cause and correction for the unusual stick-free instability of the original production P-63 airplane in high-speed straight flight." The rib spacing and stabilizer incidence of the original design were found to increase instability. When they were both altered, stability was improved and fabric deflection was reduced, but stick forces were not substantially altered.
Date: October 1945
Creator: Johnson, Harold I. & Mungall, Robert G.
Item Type: Refine your search to only Report
open access

An Investigation of the Ranger V-770-8 Engine Installation for the Edo XOSE-1 Airplane 2: Aerodynamics

Description: Investigations were made to determine the cowling and cooling characteristics of the Ranger V-770-8 engine installation in an observation seaplane. Final cowl configurations possessed ample engine and oil-cooler pressure drops for cooling in the critical normal-power climb condition with any of the three baffle configurations tested. The indicated critical Mach number of the cowling was found to be 0.70 as determined by the pressure on the lower lip of the inlet.
Date: October 1945
Creator: Dennard, John S. & Nichols, Mark R.
Item Type: Refine your search to only Report
open access

Some Flight Measurements on Pressure Distribution During Tail Buffeting

Description: Report presenting pressure-distribution measurements obtained from the horizontal tail surfaces of the Curtiss P-40K airplane during low-speed pull-ups to abrupt stall in which tail buffeting was experienced. The chordwise load distributions during buffeting are similar to those experienced during angle-of-attack changes. The location of the stall and frequency of stall disturbances are also described.
Date: October 1945
Creator: Boshar, John
Item Type: Refine your search to only Report
open access

Tank Tests of a Powered Dynamic Model of a Flying Boat Having an Afterbody Length-Beam Ratio of 4.7-Langley Tank Model 203C-1

Description: Report discussing the results of testing on a flying boat model with an afterbody length-beam ratio of 4.7 to determine its takeoff and landing stability and resistance characteristics.The range of stable trims was smaller than models with a conventional afterbody, but the range of stable positions for the center of gravity was about the same. Landing stability was satisfactory, and the hump resistance and trim is less than a boat with a smaller ratio.
Date: October 1945
Creator: Olson, Roland E. & Haar, Marvin I.
Item Type: Refine your search to only Report
open access

Two-Dimensional Wind-Tunnel Investigation of Six Airfoil Sections for the Wing of the Vega XP2V-1 Airplane

Description: Report discussing testing of six airfoil sections for the wing of the Vega XP2V-1 airplane in a smooth condition and with standard leading-edge roughness. Information about the lift, drag, pitching-moment characteristics, and sensitivity to roughness is provided. No airfoil was found to be superior to the others in all categories.
Date: October 1945
Creator: Fullmer, Felicien F., Jr.
Item Type: Refine your search to only Report
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