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MMLU-Pro / 12205 / The wings of anaeroplanehave a total plan area of 320 ft^2 The plane weighs…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

The wings of anaeroplanehave a total plan area of 320 ft^2 The plane weighs 18,000lbf, and the normal speed in level flightis 230 ft/sec when the atmospheric density is 0.076lbm/ft^3. (a) If thetailplanecontributes 5 percent of thetotal liftforce, whatmust be the lift coefficient of the wings at this operating condition ? (b) If, at the same flight condition, the drag coefficient of the wingsis 0.055, and the total drag is 1.75 times that caused bythe wings alone, what forward thrust is required? Ignore interferencebetween the wings and the fuselage.

category

engineering

options

  1. 0.85, 1937lbf
  2. 0.80, 1987lbf
  3. 0.95, 1837lbf
  4. 0.70, 2087lbf
  5. 0.78, 2032lbf
  6. 1.00, 1787lbf
  7. 0.90, 1887lbf
  8. 0.75, 2037lbf
  9. 0.60, 2187lbf
  10. 0.65, 2137lbf

src

stemez-FluidMechanics

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Source and history

upstream_id / Original problem ID
12205
task_id
af676769-c6c9-5bb8-a465-c8b573741bbd
task_key
default--test--12205
task_revision_id
1
config / split
default / test

Official source

initial import