The first diesel-powered LSA debuts from IndUS Aviation, Stafford Manufacturing offers a variety of mounting collars, and AirGator improves its handheld electronic flight book (EFB).
If you need a horn to sound when the airspeed drops below a certain level or when the power is cut and the landing gear is still up and locked, an electronic circuitry solution is the lightest, most reliable and most cost-effective way to go.