B and C). Since the final velocity imparted by the catapult is proportional to the area enclosed by the

pressure-time curve, it is evident (from fig. 45) that the catapult must be designed so that acceptable

performance results at both extremes of allowable temperature.

(2) *Use of "Ideal" acceleration vs. time curves to estimate stroke length.*

for determining the approximate acceleration, velocity, and travel vs. time curves for a three-tube

catapult system.

moves only upon completion of the stroke of the telescoping tube.

ratio) is equal to 0.82. This figure is representative of the catapults developed for pilot ejection.

the dashed lines of figure 43 and as described in the preceding paragraphs. The basis for this

derivation is the acceleration-time curve for a three-tube catapult shown by the dotted line

approximation of figure 44. The subscripts 1, 2, and 3 refer to increments of acceleration,

velocity, or travel over the times t0-1, t1-2, and t2-3, respectively.

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