This has about half the lifting power of hydrogen, so the balloons had to be larger; however, coal gas was far more readily available, and the local gas works sometimes provided a special lightweight formula for ballooning events.
32.
Helium's advantage is that it requires no fuel to maintain its lifting power; its drawback is that as it expands from the sun's heat, it threatens to tear a balloon apart and must be vented, depleting its supply.
33.
Because it is a noninflammable gas with nearly as much lifting power as inflammable hydrogen, it was prized by airship builders and users following World War I, a conflict in which hydrogen-filled Zeppelin bombers had proved to be deathtraps.
34.
This flying machine consisted of a light frame covered with strong canvas and provided with two large oars or wings moving on a horizontal axis, arranged so that the upstroke met with no resistance while the downstroke provided lifting power.
35.
His flying machine consisted of a light frame covered with strong canvas and provided with two large oars or wings moving on a horizontal axis, arranged so that the upstroke met with no resistance while the downstroke provided lifting power.
36.
Ideally I'd like to have an accurate understanding of the lifting power before I make my purchase so as to better calculate the total area required . . . Thank you . talk ) 09 : 33, 29 October 2012 ( UTC)
37.
In December 1959, the Silverstein committee ( formally known as the " Saturn Vehicle Evaluation Committee " ) decided to skip development of the Saturn A and B configurations and go straight to the Saturn C configurations, which provided greater payload lifting power.
38.
Most attention was given to soil physics, for example, water-holding capacities of soils, moisture requirements of plants, aeration, movement of water in soils, movement of groundwater, the drafts of plows, and the lifting power of windmills; he also began studies of soil fertility.
39.
Being a genetically enhanced human being gives the Agent various skills namely Strength ( punching and lifting power ), Agility ( jumping and movement speed ), Driving ( handling vehicles ), Explosives ( the use of grenades and rocket launchers ), Firearms ( shooting ability ).
40.
Either they must agitate for bigger nominal wage increases _ making better use of the leverage they have from a very low unemployment rate _ or they will have to accept that the longest economic expansion in American history has lost its lifting power for them.
