Category Archives: TBM

The TBM 700 Powered by the PT6A-64 Led to Even Faster TBM Variants

The SOCATA TBM (now Daher TBM) is a family of high-performance single-engine turboprop light business and utility aircraft manufactured by Daher. It was originally collaboratively developed between the American Mooney Airplane Company and French light aircraft manufacturer SOCATA.

The design of the TBM family originates from the Mooney 301, a comparatively low-powered and smaller prototype Mooney developed in the early 1980s. Following Mooney’s acquisition by French owners, Mooney and SOCATA held a series of in-depth discussions on the potential for co-developing a new enlarged turboprop design derived from the earlier 301; these resulted in the formation of a joint venture for the purpose of developing and manufacturing the envisioned aircraft, which was designated as the TBM 700. From the onset, the emphasis was placed upon the design’s speed, altitude, and reliability. Upon its entry into the market in 1990, it held the distinction of being the first high-performance single-engine passenger/cargo aircraft to enter production.[

Shortly after launch, the TBM 700 was a market success, which quickly led to the production of multiple variants and improved models, often incorporating more powerful engines and new avionics, amongst other features. 

The prefix of the designation, TBM, originated from the initials “TB”, which stands for Tarbes, the French city in which SOCATA is located, while the “M” stands for Mooney. At the time of its conception, while several aviation companies had studied or been otherwise considering the development of such an aircraft, the envisioned TBM 700 was the first high-performance single-engine passenger/cargo aircraft to enter production. From the onset, key performance criteria were established for the design, demanding a high level of reliability while also being capable of an unequaled speed/altitude combination amongst the TBM 700 other single-engined peers.

The Pratt & Whitney CanadaPT6A-64 engine, providing up to 700 shp (522 kW) powers the TBM 700. According to Flying Magazine, the PT6A-64 engine is “the secret to the TBM 700’s performance. At sea level, the engine is capable of generating a maximum 1,583 shp (1,180 kW), which is intentionally limited to 700 shp (522 kW) on early TBM models; the limit allows the aircraft to maintain 700 shp (522 kW) up to 25,000 ft (7,620 m) on a typical day. Engine reliability and expected lifespan are also enhanced by the limitation. While the typical engine overhaul life is set as 3,000 flight hours between overhauls, on-condition servicing can also be performed due to various engine parameters being automatically recorded by the engine trend monitoring (ETM) system. Data from the ETM can be reviewed by the engine manufacturer to determine the level of wear and therefore the need for inspection or overhaul. The ETM, which is connected to the aircraft’s air data computer, also provides information to enable easy power management by the pilot.