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This result can also be obtained from Eq. 11-11 or 11-14. The ratio is given by

The loaded gross weight of the rocket motor (not the vehicle) can only be estimated after a detailed design has been made. However, an approximate guess can be made by choosing a total impulse to weight ratio of perhaps 143.

Beause the propellants account for 109 lbf, the hardware parts can be estimated as 14 0- 109 = 31 lbf.

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Project Management Made Easy

Project Management Made Easy

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