Category Archives: Uncategorized

Piper’s PT6A Powered M600 Flagship Makes LABACE Debut

Making its first appearance in Brazil is Piper’s sleek M600 six-seat turboprop single. Local dealer J.P. Martins Aviação is hoping to conclude the first sale in the country during the show and reports significant interest in the aircraft.

Much of that interest is coming from the agricultural business, which needs fast, efficient, and reliable transport links between farms, cities, and regional airports. Piper has yet to certify the M600 for unimproved runway operations from grass and sand surfaces, but that approval is expected before the end of the year, which will make the job of selling the M600 into the “agro” sector that much easier.

Continue reading Piper’s PT6A Powered M600 Flagship Makes LABACE Debut

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

The R-1340 Powered AT-6 Texan from the Cockpit Pilot View

The best indication of how good a trainer the AT-6 Texan was/is can be seen by the fact that here we are forty years into the jet age and there are still countries around the world using the North America aerial classroom as first-line trainers. As recently as five years ago, major air forces still used it and it is the updating of those air forces which has pumped so many surplus T-6s into the American civilian market.

Continue reading The R-1340 Powered AT-6 Texan from the Cockpit Pilot View

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

Choosing Your Engine

Choosing Your EngineObviously, an aircraft is made up of many different parts. And just like a car, your aircraft can be improved or modified as needed – or as desired. The engine is the primary aspect of operation, and it’s important to have the best possible engine for your aircraft. While regular maintenance and care from a certified mechanic will keep your engine working properly for years, there may come a time when you want or need an upgrade. And when that happens, you’ll need to find the right engine for your aircraft. There are a few different things you’ll want to take a look at when choosing your engine to ensure you find the best one for your situation.

Continue reading Choosing Your Engine

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

Pratt & Whitney PT6 Celebrates 50 Years Part 2

The 12 engineers who gathered in 1957 to build the first turbine engine for Pratt & Whitney, and who can be considered the brains behind the PT6, created an engine in two sections that are easily separated for maintenance.  The creation of these engineers led to aviation history.

First Flight

beechcraft The PT6 first flew on May 30, 1961 as the power for a Beech 18 aircraft in Ontario, Canada.  Full-scale production began in 1963, and in December of that year, Pratt & Whitney shipped the first PT6 to Beech Aircraft Company to power their Beech 87, an aircraft that later became the King Air.  Experts said that the PT6 was an innovative gas turbine representing significant advances in technology, with great advantages over traditional piston-driven engines.  Much of this benefit was due to the higher power to weight ratio the PT6 offered.

Piper Milestone

piper

In 1967, the Piper PA-31 Navajo first flew using a PT6 engine.  Despite enormous success building light aircraft engines since the 1930’s, Piper fought the adoption of turbine engines in their aircraft.  Instead, they preferred the more traditional piston-driven engines.  This marked an important milestone for Pratt & Whitney who had attempted to get Piper to switch to their turbine engines for many years.

Other Applications

 Although the Pratt & Whitney PT6 became the most popular engine for powering high-performance airplanes and helicopters, in its early days an industrial version known as the ST6 appeared in some interesting applications.  In 1966, the Thunderbird, a 10-meter boat owned by Jim Wynn, a racing-boat champion, used two ST6 engines.  It was one of only two boats out of 31 to complete the Sam Griffith Memorial Race on February 22, 1966, and although it came in first, it was denied official recognition as it was considered experimental.  The turbine engine powered Turbo Train was designed to provide passenger service between New York and Boston, and was supposed to be a centerpiece at Expo 67.  Unfortunately, it was not completed in time for the Expo, but by 1973, was regularly travelling at speeds of nearly 193 km in the Montreal-Toronto corridor.  In 1978, Andy Granatelli, President of STP, installed an ST6 in his custom-made Corvette after it was banned from use in the STP Indy cars by the USAC.

The PT6 not only has a long and colorful history as an aircraft engine, but in powering other types of vehicles as well.  Learn more about the PT6 and find out more about the aircraft maintenance services at Covington Aircraft by contacting them online or by phone today.

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

Pilot Safety and Warning Supplements Part 2: System Operations

Pilot SafetyIn addition to pilot safety factors affecting flight operations, there are additional considerations regarding system operations of an airplane. System operations include restraint systems, fuel system operation and contamination possibilities, the operation of auxiliary fuel tanks, instrument power, alternate air systems, carbon monoxide, and turbochargers. In addition, pilots must understand what to do in emergency situations, such as in-flight fires or the opening of the plane’s doors while in flight.

Pilot Safety and Restraint Systems 

As pilots gain experience, one area of pilot safety where they often become complacent is in the use of seat restraints throughout the flight. Injuries are often reported due to cabin occupants not being properly restrained, especially during turbulence. Not only could this cause injury to pilots, but it could also result in the loss of aircraft control. In addition to posing a threat to the cabin crew, failure of passengers to continue wearing seat restraints may result in injury during rough periods of flight, making it critical that part of every pilot safety process should include proper seat restraint for all passengers and crew throughout the flight. Pilots should be sure that cabin crew seats are on the seat tracks and in locked position. It is also important to check any aft seats in the aircraft to be sure that the seat stop pins are engaged before takeoff and landing.

Aircraft Fuel System

It is the pilot’s responsibility to ensure the aircraft is properly serviced prior to each flight. This includes ensuring that the quantity of fuel is adequate, that proper fuel system checks are complete, and that fuel in the tank has been properly sampled. In addition, it is a critical part of pilot safety to be sure that the fuel cap is secure to avoid fuel syphoning during flight, which could interfere with the operation of the fuel quantity indicator. An understanding of fuel pump operation is another factor that must be included in pilot safety. Understanding the operation of the auxiliary fuel pump, the risks of excessive fuel vapor, and the differences between the fuel pump operations of carbureted engines, TCM fuel injected engines, precision/Bendix fuel injected engines, centerline thrust twins, and multi-engine planes is important.

Auxiliary Fuel Tanks 

Some aircraft incorporate auxiliary fuel tanks to increase the range and endurance of the airplane. If a pilot plans to use the auxiliary fuel tanks, the main tank must be used for at least 60 minutes of flight if the plane has a 40-gallon auxiliary tank, or 90 minutes if the auxiliary tank is a 63-gallon tank. This pilot safety feature allows enough space in the main tanks for fuel vapor and fuel return from the engine. Failure to do so could result in fuel overflowing through the overboard fuel vents, or lead to fuel in the auxiliary tanks being depleted sooner than expected.

Instrument Air Power 

Several areas of instrument air power can affect pilot safety. They include:

  • Vacuum Power Failures – In some cases, an aircraft has a backup vacuum system in the event the primary system malfunctions. When a plane does not have a backup system, the pilot must rely on partial instrument panel operation, which includes monitoring several indicator gauges and lights on the panel. If the pilot suspects that the vacuum system is not operating properly, pilot safety requires that the plane be landed as soon as possible for repair.
  • Electrical Power Failures – Operational handbooks provide emergency procedures should the aircraft lose partial or total loss of power during flight. Early detection of an electrical power failure is critical for the pilot to maintain control of the aircraft.
  • Loss of Pitot/Power Sources – If the pitot tube ram air inlet becomes blocked, the aircraft airspeed will drop to zero, and if the blockage cannot be removed in flight, pitch attitude and power settings must be used by the pilot to maintain reasonable airspeed. Therefore, pilot safety requires that the pitot tube, drain hole or static port be inspected thoroughly pre-flight to avoid such an emergency.

In-Flight Emergencies 

Many pilot safety recommendations are designed to prevent in-flight fires, which must be controlled as quickly as possible. It is critical that a pilot not become so distracted by an in-flight fire that control of the airplane is lost. Another in-flight emergency that can greatly affect pilot safety is the opening of doors in-flight. In the case of an accidental door opening during flight, it is critical the pilot remains calm and undistracted by the shock of a sudden loud noise or increase in noise level, as this can result in loss of control of the aircraft.

All of these pilot safety features are critical to safe flight for passengers, the crew and the aircraft itself. In addition to these important safety checks, the pilot must be familiar with carburetor heat and induction icing, alternate air for fuel injected engine icing, the possibility of carbon monoxide contamination in the aircraft, and the operation of turbochargers if they are present. For more information on pilot safety, visit us at www.covingtonaircraft.com. Follow us on LinkedIn and Twitter to stay up to date on the latest aviation news.

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

Airplane Maintenance

NationalCropdustingDay

Although every aviation mechanic should be well-versed in the maintenance requirements of aircraft turbine engines, with time comes complacency. Failure to adequately perform maintenance on a gas turbine engine can lead to engine failure, which could have catastrophic, if not deadly, results.  Therefore, let’s examine a few routine maintenance items on aircraft turbine engines that are often overlooked.

Improper Torqueing Techniques

One common error during maintenance on an aircraft turbine engine is using improper torque.  Mechanics often estimate the amount of torque they are using rather than getting a torque wrench to perform the maintenance correctly.  When engineers design an aircraft, whether it is one with a large or small turbine engine, a thorough analysis is done on the stresses that will affect each part of an aircraft.  Under-torqued hardware will result in inadequate preload and lead to unnecessary wear on nuts and bolts, while over-torqued hardware exceeds the design limits and often leads to failure.

Improper O-Ring Installation

When mechanics get busy, O-ring installation is one of the aircraft turbine engine maintenance requirements that are easily overlooked. However, by following good standard practices, O-ring maintenance is much easier.  Inspect O-rings prior to installation, looking for manufacturing defects, such as cracks or material left over from the manufacturing process.  Ensure the O-rings are properly lubricated using the correct type of lubricant.  Improperly lubricated O-rings can clog filters and fuel nozzles.  Install a protective sleeve over any threads the O-ring slides over to prevent damage.

Clamp Complacency

Another area where mechanics can become complacent while performing routine aircraft turbine engine maintenance is inspecting the many clamps found in the aircraft engine.  Mechanics should inspect clamps for proper cushioning as worn or out-of-position clamps can cause wire and tubing chafing.  When clamps are replaced, check for damage to the tubing where the clamp was located, and replace the clamp with one of the same size.  A clamp that is too small will pinch the hose, while one that is too large will not hold the hose securely.  Solvents spilled on rubber clamps could cause deterioration of the rubber, so use caution.  Never use tie wraps in place of clamps as tie wraps are hard enough to cause serious damage to the wiring, tubing and engine frames.

 

Visit us at www.covingtonaircraft.com for more information about aircraft turbine engine, as well as radial engine, overhauls, maintenance and repair.  You can also find us on Facebook and LinkedIn.

[gravityform id=”1″ name=”Request Maintenance”]

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS

Spitfire Pilot vs. Hawker Hurricane Dog Fight

The Spitfire pilot flies a very similar plane to the Hawker Hurricane, even though the aircraft were built by different companies.  The Spitfire, designed with a focus on the highest technology available at the time, was designed by R.J. Mitchell, chief designer at Supermarine Aviation Works, a subsidiary of Vickers-Armstrong. The Spitfire’s inaugural flight took place in March 1936, and was introduced into the Royal Air Force in 1938.  The Hawker Hurricane, built by Hawker Aircraft, flew its first flight in November 1935, and was introduced into the Royal Air Force in 1937.  Although the Hurricane became renowned during the Battle of Britain and accounted for 60 percent of the Royal Air Force air victories in that battle, the Spitfire is a more well-known aircraft.

spitfire-pilotBetter Maneuverability

Spitfire pilots agreed that the plane provided superb maneuverability, while the Hurricane’s maneuverability was just “good.”  The Spitfire was armed with four .303 machine guns and two 20mm cannons, while the Hurricane carried four 20mm cannons.  During the Battle of Britain, there were 32 squadrons of Hurricanes compared with only 19 squadrons of Spitfires, yet the Spitfire is the better known of the two planes.  Many Spitfire pilots claimed that the plane was like a thoroughbred, and reported that the plane was more responsive than the Hurricane.

Battle of Britain

During the Battle of Britain, Spitfire pilots were renowned for defending Britain against the Luftwaffe, with the Spitfire intercepting German fighters, while the Hurricane concentrated on the bombers.  The Hurricanes, considered the workhorse of the RAF, executed corkscrew dive maneuvers which the German planes found difficult to counter.  The Spitfire pilot, due to the plane’s thin cross-section elliptical wing, could fly at higher speeds than the Hurricane, allowing it to maneuver deftly against German fighter planes.

Easier Repairs

One benefit the Hurricane had over the Spitfire was that the Hurricane had a wooden rear frame covered in fabric, making it easier to repair than the all-metal Spitfire.  Guns in the Spitfire were further apart, and the guns placed toward the tips of the wings occasionally caused balance problems when fired.  Spitfire pilots also stated that it was harder to see the ground from the cockpit due to the plane’s long, straight nose, while the curved nose of the Hurricane made it easier to see the ground in front of the plane.  The Spitfire was retired in 1961 to the dismay of many Spitfire pilots.

The Spitfire and the Hawker Hurricane were excellent fighter planes during their time.  For more information on these aviation marvels, visit Covington Aircraft.

[gravityform id=”1″ name=”Request Maintenance”]

Share and Enjoy

  • Facebook
  • Twitter
  • Delicious
  • LinkedIn
  • StumbleUpon
  • Add to favorites
  • Email
  • RSS