An airplane takes, 7 min, 30 sec to reach 8000 ft altitude. In that same interval, (i.e. 15 min from sea level) it reaches 13600 ft. altitude. What is the ceiling?

- An airplane weighs 4600 lbs; its rate of climb at sea level is 1100 ft./min; its absolute ceiling is 14,000 ft. What is its service ceiling?

Answer: 15, 650 ft

An airplane weighs 2,500 lbs. What is the excess horsepower at its service ceiling?

Answer: 7.6 hp

The service ceiling of an airplane is 14,000 ft. Its rate of climb at sea level is 890 ft./min, what is the absolute ceiling?

Answer: 15, 650 ft

A Bellanca airplane, whose ceiling is 17,000 ft., climbs 900 ft./min. at ss;c. How long will it require to climb from sea level to 12 000 ft?

Answer: 23 mins

For the Sopwith Camel in problem #14, calculate the equilibrium glide velocity at 3000 ft., corresponding to the minimum glide angle. The aspect ratio of the airplane is 4.11, the Oswald efficiency factor is 0.7, the weight is 1400 lb, and the wing area is 231 ft.^{2}.

An airplane climbs to a certain time to 2200 ft; in twice that time it climbs to 3800 ft. What is the ceiling?

Answer: 8000 ft

For an airplane weighing 4000 lb, the excess horsepower at sea level is 60 hp; at 10000 ft altitude there is an excess power of 17 hp. What is its service ceiling?

At sea level an airplane’s rate of climb is 1000 ft. per min. Its absolute ceiling is 15000 ft. How long will it take to climb to 7000 ft altitude?