Category Archives: PT6A

A Brief Look at the PT6A Powered Beechcraft Model 99 & Variants

The Beechcraft Model 99 is a civilian aircraft produced by the Beechcraft. It is also known as the Beech 99 Airliner and the Commuter 99. The 99 is a twin-engine, unpressurized, 15 to 17 passenger seat turboprop aircraft, derived from the earlier Beechcraft King Air and Queen Air. It uses the wings of the Queen Air, the engines and nacelles of the King Air, and sub-systems from both, with a specifically-designed nose structure. Design and development

Jamaica Air Shuttle Beech 99 In Flight

Designed in the 1960s as a replacement for the Beechcraft Model 18, it first flew in July 1966. It received type certification on May 2, 1968, and 62 aircraft were delivered by the end of the year.

In 1984, the Beechcraft 1900, a pressurized 19-passenger airplane, was introduced as the follow-on aircraft.

Production ended in early 1987. Nearly half the Beech 99s in airline service are now operated as freighters by Ameriflight.

Variants

  • 99 Airliner: Twin-engined Commuter and cargo transport aircraft, 10,400 lb max takeoff weight, accommodation for a crew of two and up to 15 passengers. powered by two 550-hp (410-kW) Pratt & Whitney Canada PT6A-20 turboprop engines.
  • 99 Executive: Executive transport version of the 99 Airliner.
  • 99A Airliner: Same as the 99 Airliner, but powered by two Pratt & Whitney PT6A-27 engines flat-rated at 550 hp.
  • A99A Airliner: One of a kind, 99A Airliner without wing center section tanks; this aircraft has been scrapped.
  • B99 Airliner: Improved version, 10,900 lb max takeoff weight, powered by two 680-hp (507-kW) Pratt & Whitney PT6A-27/28 engines.
  • B99 Executive: Executive transport version of the B99 Airliner.
  • C99 Commuter: Improved version, 11,300 lb (5,100 kg) max takeoff weight, Pratt & Whitney PT6A-36 (engines flat rated at 715 hp)
Ameriflight Beech C99 freighter takes off from the Mojave Airport

Operators

In July 2018, 105 Beechcraft B99 were in airline service, all in the Americas:[1]

Specifications (Model 99A)

General characteristics

  • Crew: One
  • Capacity: Normally 15 passengers (8-seat ‘Business Executive’ model available)
  • Length: 44 ft 6¾ in (13.58 m)
  • Wingspan: 45 ft 10½ in (13.98 m)
  • Height: 14 ft 4⅓ in (4.37 m)
  • Wing area: 279.7 ft² (25.99 m²)
  • Empty weight: 5,533 lb (varies depending upon equipment and configuration) (2,515 kg)
  • Loaded weight:
  • Max. takeoff weight: 10,400, 10,900, or 11,300 lb – see above (4,727 kg)
  • Powerplant: 2 × Pratt & Whitney PT6A-20, -27. or -36 turbopropHartzell constant speed, feathering, and reversing, 550, 680, or 715 eshp depending upon model/mod status each

Performance

First read at https://www.revolvy.com/page/Beechcraft-Model-99

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Epic Aircraft E1000 wins Flying Innovation Award

BEND, Ore. (KTVZ) — The Epic Aircraft E1000 has been selected to receive Flying Magazine’s prestigious 2020 Flying Innovation Award, which recognizes the most innovative product to have reached the general aviation market in the previous year.

According to Flying, the new turboprop combines power with passion to earn Flying’s highest honor, among a strong field of 2020 Editors’ Choice Award winners.

“The team at Epic can be honestly and deeply proud of the accomplishment they’ve made with the E1000. Certified in November 2019 and delivered to its first customers this past spring, the E1000 is a true beauty. And it’s truly deserving of Flying’s 2020 Innovation Award,” said Julie Boatman, Editor-in-Chief of Flying.

Epic Aircraft’s E1000 via Epic Aircraft

“We are honored to receive the 2020 Flying Innovation Award,” said Epic CEO Doug King. “This is true validation of the incredible effort of our entire team to bring this phenomenal aircraft to market. It recognizes our unwavering commitment to a pilot-driven design process where performance, function and form are all priorities. This balance of design with engineering has allowed us to elevate industry standards and offer our customers tremendous safety, ease of operation and fun.”

Despite the challenges posed by COVID-19, Epic said it “continues to complete customer deliveries, with strong support from its employees, suppliers and the FAA, and expects to further accelerate production schedules in coming months.”

Powered by the Pratt & Whitney 1200-horsepower PT6A-67A engine, the all carbon fiber single-engine turboprop, the E1000 flies at max cruise speeds of 333 knots, climbs at 4,000 feet per minute, operates up to 34,000 feet, and offers a full fuel payload of 1,100 pounds. Normally, presentation of the Flying Innovation Award would take place at EAA AirVenture, but instead it will be presented to the entire Epic Aircraft team at an event this fall.

ABOUT EPIC AIRCRAFT: Epic Aircraft, LLC specializes in the design and manufacture of high performance, all composite, six-seat single-engine, turboprop aircraft. Epic is a privately held, design-driven aviation company that conducts all of its engineering, manufacturing and administrative operations at its Bend, Oregon headquarters. For more information about Epic Aircraft, please visit www.epicaircraft.com.

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A Look at the Ayres Thrush S2R Series

The S2R Series is a fixed undercarriage low-wing single-engine tailwheel configuration agricultural aircraft of all-metal construction with the welded steel-tube fuselage. The hopper is located forward of the cockpit, and the aircraft is available in single or dual (tandem) cockpit configurations. The S-2R model was developed by Rockwell from the S-2D by widening the fuselage from 38” to 46” to accept a larger 400 US gallon hopper, to be able to carry a greater volume of low-density materials used by Rice growers, and adding flaps.

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The History of And Types of Air Tractor Aircraft Powered by P&W Engines

Air Tractor is a leading manufacturer of purpose-built aircraft for agricultural, firefighting and a variety of utility applications. From North, South and Central America, to Australia, Indonesia, and China to Spain, Italy, Croatia and Africa, Air Tractor aircraft can be found in more than 30 countries around the world and are supported by a global network of Air Tractor dealers.

Continue reading The History of And Types of Air Tractor Aircraft Powered by P&W Engines

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The Perils of Having an Oil Starved PT6A & What To Do About It

Sometimes things happen!  It’s not very profound, but it is very true.  Engines suffer through prop strikes, wire strikes, hot starts and hard landings.  Frequently, post incident inspections reveal minor damage and the engines are repaired and returned to service promptly.  Recently, engines have been brought to Covington for investigation because “things” have happened to them.  One was a reported incident of a starter/generator arcing.  The starter/generator malfunctioned and was replaced.  While the maintenance appears to have been performed properly, “things” still happen.  Here is what we found upon disassembly:

oil starved PT6a

An indication of electrical discharge was noted from the starter gear and all through the accessory gearbox. The #1 bearing failed, which in turn allowed the compressor to shift causing a severe rub of the compressor components and the compressor turbine blades. Another engine suffered from oil starvation:

Another engine suffered from oil starvation:

PT6A oil starved

And a third engine had a failure in the turbine area:

pt6a oil starved 2

Even though the engines pictured here suffered from in-flight shutdowns, all of the aircraft were able to land safely and all pilots walked away.

Although we understand that “things” happen, we don’t want them to happen to you.  If they do, we will work with you no matter where your previous maintenance was done, to ensure that you have a rental/replacement engine as quickly as possible to keep you flying.  Remember to be aware of changes in your engine or events that could cause damage.  Pay attention to the way it sounds (blade rubbing), looks (metal or debris in oil), smells (oil burning) and feels (vibrations) along with watching the gages.  You may be able to detect a problem before some ”thing” happens to your engine.

Need to have a certified expert look at your PT6A engine? Founded in 1972, Covington Aircraft is a world-leading aircraft engine maintenance, repair and overhaul facility specializing in the PT6A turbine engine and R-985 and R-1340 radial engines. We are a Pratt & Whitney Canada certified Distributor and Designated Overhaul Facility (DDOF), and provide world-class corporate and agricultural aircraft service.

Request maintenance by visiting here >>>> http://www.covingtonaircraft.com/contact-us/request-maintenance 

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The PT6A Powered Beechcraft King Air 250

Beechcraft King Air 250 is a highly advanced turboprop business aircraft developed by Textron Aviation.

The aircraft secured type certification from the Federal Aviation Administration (FAA) in June 2011. It also received similar certification from the National Civil Aviation Agency of Brazil (ANAC) in the same year. The European Aviation Safety Agency (EASA) certified the aircraft in April 2012.

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