The phrase "airplanes to replace" is correct and usable in written English.
It can be used when discussing the substitution of one type of airplane for another or when referring to a plan to introduce new airplanes in place of older models.
Example: "The airline announced plans to acquire new airplanes to replace the aging fleet."
Alternatives: "aircraft to substitute" or "planes to take the place of".
One aviation expert gave a preliminary estimate of $3 million an airplane to replace the insulation, but stressed that this was a rough guess.
The trail declined in use in the 1920s, when the airplane began to replace the dogsled as the primary means of crossing the difficult terrain.
By now another Coast Guard airplane had arrived to replace the first one on the scene and was soon followed by an MH-60 Jayhawk helicopter, piloted by Lt. Cmdr.
The aircraft, which takes off like a helicopter and cruises like an airplane, is meant to replace the Marine Corps' aging fleet of transport helicopters, the Boeing CH-46E Sea Knight and United Technologies Sikorsky Aircraft Divisionon's CH-53D Sea Stallion.
"Eventually, Nasa would love to replace airplanes like the Boeing 737 or Airbus A320 that represent a large fraction of civil aviation," says Jack Langelaan, a professor of aerospace engineering at Penn State University.
[C13.] Economics of Fighting Terrorism Given the nature of the conflict with terrorism, the economy is not likely to be revived by the developments that fueled previous wartime booms, like surging orders for tanks and airplanes or demand for workers to replace those who go off to fight.
The Marine Corps wants to spend more than $30 billion to buy 360 of the tilt-rotor Ospreys, which can cruise like an airplane and hover like a helicopter, to replace its CH-46 and CH-53D helicopters.
BlackBird wants to replace driving with private airplane travel.
This kind of design might be used to replace metal support structures in airplane seats, according to the company.
Ara Guzelimian, the artistic adviser of Carnegie Hall, argues that distance-learning should not be used merely "to replace the expense of an airplane ticket".
