Aero ‘lectrics

Author Jim Weir explains his preparation for the installation of an energy-efficient power system for a hangar or building shed-all on a shoestring budget. He explains how to choose equipment, calculate power needs, the right light fixtures, power generation, equipment suppliers and prices, and the basic legality of such systems;

Lancair Evolution

Lancair Aircraft is revolutionizing its already successful turboprop line of kits with the new Evolution, a 750-horsepower, Pratt & Whitney-PT6A-powered, carbon-fiber composite, 380-mph four-seater to be available later this year.

Wag-Aero Super Sport

The easy-to-build, high-wing Wag-Aero Super Sport CUBy combines the Cubs classic looks with modern technology and materials, increasing both maximum weight and payload. Using engines of up to 150 horsepower, the Cub offers great short-field performance, high roll rates and easy glideslope control-a great option for those who cant afford vintage prices.

Around the Patch

Taking a measured, conservative approach to the development of new technologies and basing decisions on real-world experience rather than hearsay is the best way to move forward in homebuilding.

What’s New

Drill holes without a template using a transfer, get around an airport with a foldable mobility scooter, auto-darkening smart welding helmets are introduced, and relays can save your avionics.

Wind Tunnel

The author discusses the theory and effect of constant-speed propellers on piston-engine airplane performance, and compares fixed-pitch versus constant-speed props, effect on thrust HP and propulsion, the comprises involved in choosing a prop, how props perform in various conditions and phases of flight, how variable-pitch props work, and why a constant-speed prop is the best choice for high-performance aircraft.

Builder Liability and You

There are ways to protect yourself from lawsuits when you sell a homebuilt aircraft. These include accurate and complete documentation of the building process, adherence to manufacturers instructions during the build, a good record of safe flight over a period of time, third party liability insurance protection and a signed liability waiver.

Light Stuff

The author reviews the Kappa KP-5 LSA, imported by Kappa Aircraft from the Czech Republic. This is a conventional, low-wing, trigear configuration airplane, with a staggered seating arrangement that allows more room for each occupant, while keeping the cockpit narrow. The KP-5 is powered by a 100-horsepower Rotax 912 ULS engine and a Woodcomp three-blade prop, and has a useful load of 583 pounds. Full-power airspeed is stated as 138 mph. Avionics equipment includes a Dynon EFIS and engine monitor, Garmin GPSMAP 496 and Garmin transponder.

Lancair Evolution

Lancair Aircraft is revolutionizing its already successful turboprop line of kits with the new Evolution, a 750-horsepower, Pratt & Whitney-PT6A-powered, carbon-fiber composite, 380-mph four-seater to be available later this year.

The Home Machinist, Part 6

Paying attention to the working environment and maintaining machining tools in tip-top shape can yield a more polished finished product, while also making the fabrication process easier.

In Case You Missed it

Letters

More Power, Scotty! I just read the article about the Arion Lightning in the...

Meet the Grizzly

AeroTek Aviations Beaver-size amphibious kit airplane, the Grizzly, showcases the company's 550-shaft-horsepower Pratt & Whitney PT6A engine conversion, which has also flown in the Murphy Moose. By Ed Wischmeyer.

Viewfinder

Marc Cook presents an argument for rewriting LSA weight-limit rules to encourage new design and technology, while improving safety and performance.

Free Flight

Modern avionics, knowledge of the weather, a sturdy airframe and a cell phone make cross-country trips less of a gamble.