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Engine Theory: Exhaust
...Engine companies may or may not offer an exhaust system—Rotax does, Lycoming does not—and airframe manufacturers consider exhaust more an engine consideration than something they’re equipped to handle. Even worse,...
Engine Theory: Diesel Engines
...4-cylinders based on Mercedes auto engines. Befitting a premium design, these engines feature everything from turbos to gear reduction prop drives and a matching price tag. Diesel Combustion Diesel engines...
Prop Momentum Theory
...the details of the propeller blades, engine, rpm, etc. It is a pure energy and momentum balance approach to the problem. The efficiency predicted by actuator disk theory is a...
Theory vs. Practice
...out of theories about raising kids. A quote often attributed to that eminent scientist Yogi Berra (but actually predates him) reads, “In theory, there is no difference between theory and...
Flight Testing: Static System Error, Theory and Practice
All the high-tech flight instruments wont help much if the basic pitot-static system contains inherent errors. Read the story to learn how to find them. Most owners of amateur-built aircraft...
Flight Testing: Static System Error – Theory and Practice, Part 2
...affect its accuracy. It should not be in the wake of the engine exhaust or cowling air exits. Many builders of RVs have put the OAT probe in the fresh-air...
UND Valve Recession Cause—GAMI’s Theory
...bought three barrels of 94UL and did his own tests in his own engine test facility and thinks he’s isolated the issue. Meanwhile, Braly said his 100-octane unleaded fuel G100UL...
2014 Engine Buyer’s Guide
...engines are built with looser tolerances than other engines you may be familiar with, especially your car’s engine. Aircraft engines are designed to run long and hard, very hard. As...
Lycoming’s 2019 Engine School Dates
...Program The Lycoming Engines Service School training program includes a review of Lycoming service publications and manuals and covers construction, theory of operation, and servicing of Lycoming reciprocating engines. Additional...
Firewall Forward: Starting Your Engine
...your first engine start should occur no more than one month before your first flight. Un-preserving the Engine Your engine should have been preserved, either by the factory or your...
In Case You Missed it
Ask the DAR
How do you know when the sum of purchased parts exceeds the 51% rule? Does the data plate have to match the registration? DAR Mel Asberry answers these questions and more.
The Little Bush Plane That Could
Amy Laboda takes a slow flight down Memory Lane. The rich history of the Kitfox over the last 25 years has had its challenges and happy endings.
Insurance And Training
Just because you built it, doesn't mean you're ready to fly it. By Scott Sky Smith.