Ainda não temos significados para "sustaining surface".
1This would give two planes with a sustaining surface of 360 square feet.
2But the sustaining surface is only four times as great.
3The smaller the sustaining surface, the higher the speed.
4One square foot of sustaining surface for every pound of the total weight will be sufficient for security.
5But this time he quickly shook out a portion of his reefed sustaining surface and slowed down in time.
6The weight, compared with sustaining surface, if expressed in understandable terms, would be equal to sixty pounds for every square foot of surface.
7We have an aeroplane with a sustaining surface of 300 square feet which weighs 900 pounds, or 30 pounds per square foot of surface.
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