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Reasons for air-lighting solids?


lextacy

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Ive seen where some vehicles such as the Delta II have 9 solid boosters, but only light 6 on the ground and then 3 more in the air at certian altitude. Can someone explain what purpose this serves?

it's because they only need all 9 at a certain time, there's no need to turn them all on at launch, it wastes fuel.

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