Equation 14 · Part 1 · Flight at the Energy Floor: Transport Selection to 2100
Symbol M
What this part means
M is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
M is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol M→Article meaning
The passage around this formula
…and 53.6 for the McDonnell Douglas DC-10 — the direct fuel-efficiency cost of pushing lift-to-drag ratio through the transonic and supersonic regime, exactly the L/D term in the Breguet equation collapsing even as speed M rises [ 11 ] . Its program cost ballooned from an initial 1962 estimate of 70 million pounds to somewhere between 1.5 and 2.1 billion pounds by 1976, with a unit cost of 23 million pounds per aircraft in 1977; against initial predictions of 350 aircraft sold, only 20 were ever built, 14 of them…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
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Sources cited in the surrounding passage
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