Experimenter

September 2013

Experimenter is a magazine created by EAA for people who build airplanes. We will report on amateur-built aircraft as well as ultralights and other light aircraft.

Issue link: http://experimenter.epubxp.com/i/178050

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ing, proper cylinder stud support, long-throw crank clearance, and added strength. The engine is cast in lightweight magnesium by Motorav's Brazilian sister company, RIMA. DeltaHawk V-4: The Diesel of the Future? The rest of the engine is also aero-focused: pistons of 94-, 98.4-, or 101.6-millimeter diameter motivate the engine's forged 94-millimeter throw crankshaft to deliver 95, 105, or 115 hp. There are proper steel cylinders and aluminum upflow dual-plug heads with generous fins; the sump has extended fins, too. These Brazilian engines are starting to accumulate flight test hours in anticipation of their general release. In the works: fuel injection and turbos. Stay tuned to www.Motorav.com. DeltaHawk's 202-cubic-inch (3.3-liter), mechanically fuel-injected, direct-drive V-4 multi-fuel compression ignition engine has been in test and development flying for more than a decade and is undergoing design revisions and further testing on its way to certification. A liquidcooled, staged turbo-supercharged (the supercharger is used for starting and "rescue power") two-stroke, the "internal dry sump" DeltaHawk can be mounted in any orientation—V up, V down, or with the shaft vertical. Horsepower ratings of 160, 180, or 200 at 2650 rpm and a compact plan view generate a lot of interest every year. Planned follow-on engines include V-2, V-6, and V-8 configurations and are in various stages of preparation. www.DeltaHawkEngines.com D-Motor's LF26: Modern L-Head When this engine appeared at the U.S. Sport Aviation Expo in January, the booth was constantly mobbed. How could an "old" L-head design attract so much attention? This 125 pounds wet (and including radiator, oil tank, and exhaust), Belgian-made, 2.7 liter, two-valve, fuel injected, dry sump, aluminum engine has grown since Sebring, and now displaces 2.7 liters, and is a bit less oversquare, at 103.6 x 80mm. Brazilian 2.6/2.8/3.1-Liter Fours Motorav is the world's largest producer of VW engine cases for the automotive market. It has now made a dedicated aircraft engine from that original inspiration, based on engineering a new optimized case that incorporates improved oiling, a real nose bear- Photography by Tim Kern Designed to fit on a Jabiru engine mount, the smalldimensioned flat four has an integrated 20A alternator and dual electronic ignition. Cylinders are Nikasil-lined. The LF26 runs on avgas or high-octane mogas. A Speed Cruiser has flown an early test engine for 1,500 hours so far. The company expects ASTM compliance this year, even as assembly is moved to Ft. Pierce, Florida. D-Motor is actively looking for builders who want to fly this 93 hp, $17,500 package. A six-cylinder "LF39" version (135 hp, 174 pounds) is in the works. www.D-Motor.eu EAA Experimenter 33

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