The only way you'll get an all-electric fuel feed system, ignition system, or any other required system approved is if there are 2 independent charging systems and batteries.
As for where to begin, an IA will have to sign off on the 337, so he's the place to start. He will have to present data supporting the modification. In answer to Ed's question, unless an FAA Airworthiness Inspector is willing to sign off himself (beyond unlikely in the current climate), an FAA approved DER (Designated Engineering Representative) would have to sign off on the design. He may accept data from someone like Chris, but he'll be the final authority. John Cooper Skyport Services www.skyportservices.net _____ From: [email protected] [mailto:[email protected]] On Behalf Of Chris Sent: Wednesday, February 18, 2009 11:53 AM To: [email protected] Subject: [ercoupe-tech] Ercoupe with 2 Electric Fuel Pumps on O200 Engine As an electrical engineer I envision a system with two fuel pumps for a 0-200 with no center tank. It would have two electric pumps. One would be powered conventionally off the generator-or-alternator/battery. The other pump would be powered off a small auxiliary battery. That battery would be on the order of a pound in weight. It would be charged off the electrical system of the aircraft. However, it would be isolated from the rest of the system by a diode (or two diodes in series for redundancy). A small circuit would be devised to indicate it is charged and has a button for testing. The whole thing could be built for $50. Of course, all the regulatory 337 stuff would be required and I don't even know where to begin on that. Chris N99674, about a year to go before flight.
