Problems a jet airplane has the ta (attachment)


5. A jet airplane has the TA
and TR curves in fig. 2-1. The airplane data: weight = 12,000 lb.
standard sea level day; clean configuration. Find:


a. Vmax at


V for maximum climb angle 95% (RPM)


sine of maximum climb angle (100% RPM)


Rate of climb at 300 knots (95% RPM)


V for best endurance;


Vfor maximum range;


V for maximum range with 100 knots of headwind.


The value of L/D max


Home Work #6


How much horsepower does it take to climb a 4000 pound airplane through a 1980
foot change in altitude in one minute?

In a power off glide at 78 knots, the drag is 200 pounds. In a 2450
pound aircraft, what is the rate of descent?


If 500 pounds of thrust results in 200 knots TAS, what is the thrust


What is the brake horsepower assuming 88% propeller efficiency?


At 5500 ft density altitude and 55% Power, a B-19 consumes 6.7 gallons per hour
in order to generate 84 knots true airspeed. What is the specific range?


A Travel Air uses 16 gallons per hour to generate 234HP. What is the specific
fuel consumption?


11. Using figure 2-2 Calculate the
velocity for best range with a 100kt headwind for the airplane at 12,000 and
8,000 lb gross weight.


15. Using
the PA-PR curves in 2-3 for a propeller airplane find: (Assume a
10,000-lb weight)




sine of the climb angle at Vs


sine of the climb angle at L/D max


rate of climb at Vs


rate of climb at 300 knots


velocity for maximum endurance


velocity for maximum range


h. velocity for maximum range
with 100 knots headwind


A Beech Baron 55 has a published sea level power of 520 HP. At 10,000
feet with 70% cruise power set, the fuel flow is 30 gallons per hour and the
TAS is 200 knots.


is the specific fuel consumption?_______


is the Specific range?________


22. How much brake horsepower does
it take to cruise an airplane under the following conditions?


= 600


= 200


ratio =


efficiency = 80%


23. It requires 525 pounds
of thrust to hold 200 knots EAS at sea level. How much thrust would it take to
hold the same EAS at 15,000 feet?


hint: in balanced flight drag equals
thrust required



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