Hello Mr. Lamar,

You might find this of interest:
http://www.designworldonline.com/developing-an-electronic-fuel-injection-system-for-uavs/


Developing an Electronic Fuel Injection System for UAVs
August 16, 2012 Natasha
Townsend<http://www.designworldonline.com/author/natasha-townsend/>
 :
Small and miniature aircraft, also known as UAVs (unmanned aerial
vehicles), require reliable propulsion systems in order to achieve extended
flight times with minimal quantities of fuel. Previously, the only option
available for fuel delivery to the engine was a carburetor.

The latter, however, is not able to provide an optimum fuel mix for all of
the various phases of flight. A newly developed miniaturized electronic
fuel injection (EFI) system created especially for small combustion engines
provides the benefits of fuel injection, long enjoyed in larger engines,
for small UAVs. This system combines reduced consumption and considerably
increased reliability. Microdrives are used to power the fuel pump to
ensure the correct pressure in the fuel system.

Regards,

Chandra Shekhar


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