Honeywell T55 family
Lycoming-origin, Honeywell T55 multi-generation heavy-helicopter turboshaft family powering every Boeing CH-47 Chinook and MH-47 flight line. The engine grew from 1,600 shaft horsepower at its 1955 introduction to today's 5,000-shp class, while the latest T55-714C upgrade is a 6,000-shp-class drop-in enhancement delivering 20% more power and 8% less fuel than T55-714A. Honeywell reports more than 6,000 engines and roughly 12 million CH-47/MH-47 operating hours, with active Army production, modernization, and sustainment; exact dash variants and installations remain separate records.
Identity
- Aliases
- Lycoming T55Honeywell T55T55-714C
- Domains
- aviation
- Identity Level
- family
- Kind
- turboshaft
- Name
- Honeywell T55 family
- Status
- active
Details
- Air Breathing Specs
- Shaft Power Kw
- 4,474
- Description
- Lycoming-origin, Honeywell T55 multi-generation heavy-helicopter turboshaft family powering every Boeing CH-47 Chinook and MH-47 flight line. The engine grew from 1,600 shaft horsepower at its 1955 introduction to today's 5,000-shp class, while the latest T55-714C upgrade is a 6,000-shp-class drop-in enhancement delivering 20% more power and 8% less fuel than T55-714A. Honeywell reports more than 6,000 engines and roughly 12 million CH-47/MH-47 operating hours, with active Army production, modernization, and sustainment; exact dash variants and installations remain separate records.
- Developers
- Manufacturers
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 22:16:02 UTC
- Updated Time
- August 14, 2026 at 19:35:43 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- Honeywell identifies T55 current and next-generation configurations, 6,000-shp-class T55-714C capability, 20% power improvement, 8% fuel reduction, and CH-47/MH-47 compatibility.
- Publisher
- Honeywell Aerospace
- Title
- T55 Turboshaft Engine
- Accessed Date
- 2026-08-14
- Note
- Honeywell records the 1955 origin, 1,600-to-4,800-shp evolution, more than 6,000 engines, and approximately 12 million Chinook operating hours.
- Publisher
- Honeywell Aerospace
- Title
- I'm 65 and I'm a Legend
- Accessed Date
- 2026-08-14
- Note
- Honeywell confirms the T55-GA-714A production contract for U.S. Army Chinook fleets and continued modernization support.
- Publisher
- Honeywell
- Title
- Honeywell Secures New Engine Production Contract for U.S. Army Chinook Fleet
- Accessed Date
- 2026-08-14
- Note
- Honeywell records Army testing of the next-generation T55-GA-714C capability for CH-47F Chinook helicopters.
- Publisher
- Honeywell
- Title
- Honeywell Successfully Begins Testing Next Generation T55 Engine