Home Technique • Air Force Colors 1926 - 1942 Vol. I by Dana Bell

Air Force Colors 1926 - 1942 Vol. I by Dana Bell

By Dana Bell

Ninety six pages, learn folks army plane colour schemes from 1926 to 1942, bw and colour illustrations

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A shunt motor and a series motor are connected in parallel Compare the percentage changes in the speeds, torques, and outputs when the motors are connected in parallel across 110- volt mains and the loads are adjusted so that the currents are unchanged. Neglect all losses and assume that the magnetization curve for each motor is a straight line. across 220- volt mains. A shunt motor takes a total current of 10 amperes from If the resistances of the field and armature circuits are 100 ohms and 1 ohm respectively what are the currents in the field and in the armature windings?

5 miles, the total current is 250 amperes, the voltage at the generator end is 600, and each conductor has a cross-section of 220,000 circular mils. Find the voltage at a Find the point on the line "x" miles from the generator. 43. distribution system consists of between which rate at and x 2 44. 32 cell is which a given portion is At the end ohm between points of the line x^ delivering energy. there of a transmission line having a resistance of Each floated a storage battery of 246 cells. f. 1 volts and an internal resistance of is has a normal The station voltage is 550 volts.

Volts 15. fs. of 5 volts and 20 volts and internal resistances of 1 ohm and 2 ohms respecThe tively are connected in parallel between points a and b. fs. of both act from a to b. connected between a and b and its resistance is 5 ohms. f. in order that the power loss in Q may equal the combined power loss in A and B. 16. fs. are 10, 15, and 20 volts and whose internal resistances are 1, 2, and 3 ohms respectively have their positive terminals connected together. The negative terminals of the first two batteries are connected to the ends of a slide wire of 10 ohms resistance, and the negative terminal of the third battery is connected, through a resistance of 5 ohms, For what to a point on the slide wire by means of a slider.

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