The restorers of a North American XP-82 Twin Mustang, one of the most unusual fighter/escort aircraft ever deployed by the U.S. military, are aiming to make EAA AirVenture 2018 its first public appearance to celebrate completion of an arduous ten-year restoration project.
The 66th annual Experimental Aircraft Association fly-in convention will be held in July at Wittman Regional Airport in Oshkosh, Wisconsin. The event is the world’s largest annual gathering of vintage warbird aircraft, with more than 300 participating each year among the 10,000 airplanes that arrive in the region for the event.
The ten-year restoration project in Douglas, Georgia, began after aircraft restorer Tom Reilly discovered the complete airframe on a farm in Ohio. Reilly then scoured the earth seeking engines, propellers and a multitude of other XP-82 parts to continue the restoration.
“The interest and enthusiasm for this restoration has been wonderful and gratifying,” said Reilly, who has chronicled the restoration process online. “There is no better place than Oshkosh to make the first public flights of this aircraft, which is why it is our intent to complete the restoration and testing so we can be a part of AirVenture 2018.”
The XP-82 restoration brings back a unique flying example of an aircraft designed late in World War II as a long-range fighter escort to accompany B-29 bombers for thousands of miles on missions over the Pacific Ocean. Based on the highly successful P-51 Mustang design, the XP-82 used twin fuselages and two specially designed Rolls-Royce Packard-built Merlin engines to supply the speed, range and armament needed for the task. Fewer than 300 of the airplanes were produced as the P-82, with all but five scrapped in the years after the Korean War as the military moved to jet aircraft.
“It has been decades since people have seen this aircraft type fly anywhere,” said Rick Larsen, EAA’s vice president of communities and member programs, who coordinates AirVenture features and attractions. “The return of this historic aircraft to the sky is a tribute to the vision and perseverance of the restoration team, and it’s fitting that the group has AirVenture as a goal to fly this beauty before a huge, appreciative audience.”
EAA AirVenture is known as the “World’s Greatest Aviation Celebration” and is EAA’s yearly membership convention. For further information, please visit www.eaa.org/airventure.
Bye Aerospace has announced that its prototype Sun Flyer 2 completed its first flight on April 10. The prototype aircraft flight test programme, which began in late March, is being conducted at Centennial Airport (KAPA), south of Denver, Colorado.
According to George Bye, Founder and CEO of Bye Aerospace, “We are excited about the future and the potential the Sun Flyer family of aircraft has to revolutionize general aviation, providing improved affordability and accessibility. Lower operating costs are key to solving the student pilot drop-out rate, which is curtailing the successful attainment of badly needed airline pilots. The Sun Flyer 2’s $3 hourly operating costs are ten times lower than traditional piston-engine flight trainers, with no carbon emissions and significantly reduced noise.”
EP Systems provided the energy storage system for the Sun Flyer 2 prototype being flight tested, including battery modules (packs), battery management unit and power distribution unit. The battery cells are LG Chem 'MJ1' lithium-ion battery cells with a 260 Wh/kg energy density. Bye Aerospace will soon announce who its electric motor partner will be for the family of FAA-certified Sun Flyer aircraft.
The Sun Flyer family of aircraft, including the Sun Flyer 2 and the 4-seat “Sun Flyer 4,” will be the first FAA-certified, U.S.-sponsored, practical, all-electric airplanes to serve the flight training and general aviation markets.
For more information, visit www.ByeAerospace.com or www.GeorgeBye.com
Since last fall, EPS Diesel has made significant progress in certifying their 'clean sheet' Graflight Flat 8 engine. The company expects to complete the process later this year. Certification activity has kept the company busy in the past year, as it continues to expand its staff and facilities.
Last fall, EPS Diesel subjected its engine to more than 70 hours of climb, cruise and restart scenarios in a revived air force chamber, which simulated altitudes up to 30,000 feet. The tests were conducted to affirm the mechanical design configuration of the Graflight Flat 8 engine, along with the advanced capabilities through the use of EPS’ proprietary Electronic Engine Control Unit (EECU) and its state of the art fuel system. “The engine responded in normal parameters at all altitudes up to 30,000 feet,” said EPS CEO Michael Fuchs.
Last summer, EPS began working on a new facility intended for engine testing, inspection, assembly and STC work. The inside space of the building is for EPS’ quality management team and for installing dyno technology, welding, fabrication space, and an engine tear down and inspection room. Once the new dyno testing facility is completed in April 2018, EPS will have the capacity to work on three engines at a time. Outside the building is an area being developed to accommodate specialized test stands that will allow for propeller tests, engine durability tests and any other climate/environmental testing as a part of certification and manufacturing.
“There are a considerable number of innovations in the Graflight Flat 8 engine,” said Fuchs, “and some of the new installations have stretched the known rules and methods for certification, especially in software, but progress has been steady and we are satisfied with our current timeline. We should be able to ship certified engines by the end of the year.”
For further information, please visit EPS.aero