David Rose obviously built the overpowered RP-4 for speed. The experimental counter-rotating propellers, inspired by a NASA project, run at an impressive rpm. Rose can connect both propellers directly to their engines without heavy reduction gearing. The props can change pitch for maximum efficiency at any speed. Type keyword s to search. Today's Top Stories. Advertisement - Continue Reading Below.
Amateur built and experimental aircraft
How exactly is the 51% rule applied for amateur-built aircraft? - Aviation Stack Exchange
The world of homebuilt aircraft — officially known in the United States as Experimental Amateur-Built Aircraft — has existed as long as powered flight. They, like the homebuilders of today, used their own abilities and craftsmanship to construct safe and efficient flying machines. EAA was founded in by a group of airplane enthusiasts mostly comprised of airplane builders, although anyone with an aviation interest has always been welcome in the organization. EAA has been the organization of record as the homebuilt movement moved from simple, single-place tube-and-fabric airplanes 60 years ago to today's wide spectrum of aircraft that feature plans- and kit-built models.
ADS - Aircraft Design Software
To be eligible for an experimental airworthiness certificate, satisfactory evidence must be presented to show that the aircraft was not assembled from completely prefabricated parts or kits. The FAA recognizes that amateur builders cannot be expected to have fabricated every part that makes up the aircraft and that some parts will be acquired from commercial sources. Items such as engines, engine accessories, propellers, rotor blades, rotor hubs, tires, wheel and brake assemblies, instruments, and standard aircraft hardware, including pulleys, bell cranks, rod ends, bearings, bolts, rivets, hot air balloon burners, and fuel tanks, are acceptable and may be procured on the open market. The use of these items is not counted against the amateur builder or kit manufacturer when the FAA determines whether the amateur-built aircraft has met the major portion requirement.
Amateur-built aircraft can be built from scratch, based on original or established designs, or from a kit. If a kit is used, the builder must have completed the majority of the build for it to be considered an amateur-built aircraft. If they meet certain performance, weight and design limitations, they can be registered with a self-administering organisation. We work with a number of self-administering organisations to provide support for aircraft builders through training, test flights and airworthiness administration and approval processes. There are hundreds of different designs and models of aircraft across the Australian amateur-built fleet.