Share
In 1923, the United States Army (there was no United States Air Force at that time) set a record for in-flight refueling of airplanes. Using
Question
In 1923, the United States Army (there was no United States Air Force at that time) set a record for in-flight refueling of airplanes. Using two refueling planes, an Airco DH-4B biplane was able to remain in flight for 37 h . During the flight, the refueling planes were able to air-transfer a total of 687 gallons of fuel to the plane in 9 refueling transfers. Assume that the refueling nozzle had a diameter of 1.45 in and each refueling took 2.45 min to perform. Calculate the velocity of the fuel through the nozzle. Assume that the fuel filled the entire cross-sectional area of the nozzle.
in progress
0
Physics
3 years
2021-07-17T23:19:52+00:00
2021-07-17T23:19:52+00:00 1 Answers
0 views
0
Answers ( )
Answer:
Explanation:
Total time of transfer oil fuel = 2.45 x 9 = 22.05 minutes
= 22.05 x 60
= 1323 s
Total volume of ful transferred = 687 gallon
= .0037854 x 687
= 2.6 m³
radius of pipe = .5 x 1.45 inch
= .5 x 1.45 x 2.54 x 10⁻² m
r = .018415 m
cross sectional area
= π r²
a = 3.14 x .018415²
= 10.648 x 10⁻⁴ m²
If v be the velocity
volume of fuel coming out a x v x t , a is cross sectional area , v is velocity and t is time .
10.648 x 10⁻⁴ x v x 1323 = 2.6
v = 1.845 m / s