The phrase "a type of engine" is correct and usable in written English.
It can be used when categorizing or describing a specific kind of engine within a broader context.
Example: "The hybrid vehicle utilizes a type of engine that combines both electric and gasoline power for improved efficiency."
Alternatives: "a kind of engine" or "a category of engine".
That kind of grounding happened most recently after the engine failure on Southwest Airlines Flight 1380 last spring prompted the F.A.A. to order closer inspections of a type of engine made by CFM International.
Aerion does not yet have a manufacturing partner, however.America's armed forces see potential in hypersonic aircraft, which fly at Mach 5 or faster using a type of engine known as a scramjet.
And modern microelectronics means that small payloads can be useful ones.A second way to get into space would be to use a design with a lot of aerodynamic lifting surfaces and a type of engine known as a hybrid motor.
The fans will be powered by four 700-horsepower marine diesel engines, a type of boat engine.
Dr. Avery's work led to a type of jet engine, the ramjet, that uses this phenomenon to achieve supersonic speeds with no moving parts.
A glimpse of what may be possible in the future can be seen in what appears to be the current pacesetter - a type of electric engine called Vasimr (Variable Specific Impulse Magnetoplasma Rocket).
"We've built a type of search engine that indexes every tool/service you connect with ChatGrape (so far, we've got GitHub, BitBucket, Google Drive, Google Calendar and Trello, with DropBox and Jira coming up next).
In the UK, a company called Skylon has just attracted £60m ($110m) of government funding to develop a futuristic type of engine known as a "reaction engine".
In an effort to salvage something from their investment, they brought in Henry M. Leland, a machine maker who had developed a new type of engine, one built to unusually fine tolerances.
ANA is the world's biggest operator of Dreamliners; its domestic rival, Japan Airlines (JAL), operates 30 787s, but they are fitted with a different type of engine.
