Front: Text describes action on various war fronts: Americans drive toward Manila; Allied aircraft active in Pacific; Red Army on road to Berlin; Allies erase German bulge. Maps: Objective Manila; Pacific action; West to Berlin; East to Berlin. Inset map of Berlin. Back: Text and 6 photographs highlight the activities of the Army Postal Service that delivers an average of 40 million piece of mail a week.

Front: Text describes action on various war fronts: Allies close on Reich from two sides, Aircraft strike over wide Pacific area, Manila liberation frees prisoners. Maps: [Germany]; [Pacific area]; Manila liberated. Insets: Manila Back: Text and 17 photographs show Japan in 1939.

Front: Text describes action on various war fronts: Allies press western front Offensive; Manila battle continues - B-29's active; Soviets make new crossings Maps: Western Front, Soviet Salient, U.S. troops continue to clear Manila. Back: Text and illustration and photographs highlight the role of Military Police.

Front: Text describes action on various war fronts: Allies Widen Kleve-Goch Salient, Red Army Drives on Danzig, Americans Land on Iwo and Corregidor - Tokyo Hammered Maps: European war [Berlin including surrounding area and 2 insets] -- Pacific war [South Pacific and insets of Tokyo and Iwo]. Back: Text, photograph, and map highlight the big three Crimea conference. "President Roosevelt, Prime Minister Churchill, and Marshal Stalin meeting on the shores of the Black Sea, fully agreed on plans and policies that are designed to bring a secure peace to the World." Highlights are: the defeat of Germany; liberation; peace security and freedom for all; remove the causes of war.

This guide is "published for the information and guidance of all concerned" (p. ii) about the proper protocol of transporting sick and wounded war victims. According to the Foreward, "It includes a description of the common methods and means of transporting patients on land, sea, and in the air, and is appropriately illustrated" (p. iii); the descriptions include manual, motor ambulance, rail, water, and air transportation.

A manual for the beginning airplane mechanic. Discusses the proper use and care of tools.

"The present report covers tests made on elliptical cylinders with a center support which were subjected to various simple and combined loadings. The tests yielded a series of interaction curves for combined loadings on such cylinders which should be useful in wing nose section analysis" (p. 1).

Note presenting an investigation of the fatigue characteristics of riveted joints in aluminum alloy sheet. The purpose of this report is to summarize all the results of fatigue tests that have been made to date in the Aluminum Research Laboratories of lap joints with 1/8-inch aluminum alloy rivets.

Report presenting an investigation to determine the bearing yield and ultimate strengths of 75S-T alloy in sheet form in both with- and across-grain directions and extruded angle in the longitudinal direction. Ratios of bearing to tensile properties were also determined.

Report presenting an iteration method for determining the longitudinal control characteristics of a flexible horizontal tail. The method permits factors such as the actual spanwise variation of elasticity and the aerodynamic induction effects due to three-dimensional flow to be accounted for to any degree of accuracy needed. An analysis is also included of the effects of horizontal-tail flexibility on the tail effectiveness, the hinge-moment characteristics, and the control-force gradients in a dive recovery for two modern fighter airplanes.

Report presenting an investigation of ailerons with a beveled trialing edge and a blunt-nose overhang of 35 percent aileron chord on an NACA 66(215)-26 airfoil in two-dimensional flow. Five configurations were tested with various modifications of the aileron nose and adjacent airfoil contour to determine the effect of modifications on lift and aileron hinge-moment characteristics.

Report presenting a large air scoop designed for high critical speed, which has been tested in the 8-foot high-speed tunnel on the fuselage of a scale fighter-type airplane. The effects of boundary layer on scoop characteristics were found to be important at all inlet-velocity ratios. Results regarding the boundary-layer surveys, characteristics of original scoop installation, and characteristics of scoop with boundary-layer passage are provided.

Report discusses the shear and normal stresses caused by a load applied until failure on the tension side of an open box beam with a flat stiffened cover. The maximum strain was found to be much less than in solid tensile specimens of the same material. Special attention is paid to the variation in strains at various parts on the beam and the potential effects of rivet holes and riveting, which requires further testing.

Force and flight tests were performance on an all-wing model with windmilling propellers. Tests were conducted with deflected and retracted flaps, with and without auxiliary vertical tail surfaces, and with different centers of gravity and trim coefficients. Results indicate serious reduction of stick-fixed longitudinal stability because of wing-tip stalling at high lift coefficient. Directional stability without vertical tail is undesirably low. Low effective dihedral should be maintained. Elevator and rudder control system is satisfactory.

Report presenting the results of tests to determine the extent to which the knocking tendency of an air-cooled engine cylinder is increased when the cylinder head is poorly cooled and when the cylinder temperature exceeds the maximum specified by the engine manufacturer. The tests showed that, when the cylinder-head temperature was increase from 400 to 600 degrees Fahrenheit, the knock-limited indicated mean effective pressure was reduced 3 percent at a fuel-air ratio of 0.097 and 39 percent at a fuel-air ratio of 0.065.

Report presenting an electron-diffraction examination of cast-iron piston rings used in a single-cylinder test engine, which showed the presence of a layer of graphite covering the surface. The wear curves from the rings studied had shown variation from high rates to very low rates of wear.

"An injection system that supplies water to each cylinder of a double-row radial engine was tested...as part of a general investigation of the power-plant installation of a four-engine heavy bomber. The tests were conducted to determine the effectiveness of water injection in cooling the engine during take-off. The injection of 500 pounds of water at the take-off power condition reduced the maximum measured exhaust-valve-seat temperature 64 degrees Fahrenheit and the maximum spark-plug-gasket temperature 55 degrees Fahrenheit" (p. 1).

Report presenting an attempt to establish a correlation of the cooling characteristics of the Wright R-2600-8 engine with water as an internal coolant and to investigate methods of introducing the water. A cooling correlation, including the effect of water as an internal coolant, was established by use of the NACA cooling-correlation method. Results regarding the cooling-performance predictions and engine condition are provided.

Report presenting testing of a German superchrager from a Junkers Jumo 211F engine. The supercharger differed from conventional American superchargers in that it had a fully shrouded impeller, which discharged through a very short vaneless diffuser into a scroll-collector case. Tests were run at impeller tip speeds from 400 to 1200 feet per second at increments of 100 feet per second for a wide range of air flows.

Report presenting testing to determine the effect of special baffles on the temperatures and cooling-air requirements of the Wright 1820 G200 and R-2600-8 cylinders. Nine baffles were tested with the 18020 cylinder and two were tested with the R-2600-8 cylinder. Results indicated that the internal cylinder surfaces with good thermal connection with the external-cooling means respond to changes in external cooling.

Report presenting an investigation of the effect of progressive ring failure on piston life. Two endurance runs were conducted on an Allison single-cylinder engine at high power output until destruction of the pistons occurred at 33.1 and 84.25 hours.

"An exhaust-port design was developed that provides a heat-flow path of increased area from the valve stem to the outside surface of a Wright C9GC cylinder. The effects of the new port design on exhaust-valve temperature and volumetric efficiency were determined from single-cylinder engine tests. A reduction of 70 degrees Fahrenheit in the exhaust-valve temperature was obtained with no decrease in volumetric efficiency or power output" (p. 1).

Report presenting strain-gage measurements made on the crankshaft of a Wright R-1820-73 test engine while under power. Bakelite-bonded wire strain gages were installed on the front half of the crankshaft and the connecting wires were brought out through the oil passages and connected to slip rings at the rear of the engine. The inertia-excited bending and tensile-compressive stresses increased almost directly with speed.

Report presenting results of tests conducted with an air-cooled, radial aircraft engine to determine the reduction in the brake specific fuel consumption that would result from operating with a very low fuel-air ratio and an increased spark advance. Computed values of the brake specific fuel consumption corrected for cooling-air drag are also given.