Honeywell Aerospace’s engine division has been active the last three years testing its business aviation engines and airline APUs on 50/50 blends of biofuel and military JP8 jet fuel.

Efforts to remove lead from aviation gasoline date from the mid-1970s when the first unleaded and low-lead fuels were introduced by refiners in response to the Clean Air Act. The initiative to qualify some light aircraft piston engines for operation on automotive fuel (“mogas”) stemmed from that era, as well.

Here are FAA headquarters’ answers to questions posed on UAV operation. 1. BCA: The deployment of civil UAVs in the NAS — when and where? FAA: Currently, there are 60 unmanned aircraft systems representing 17 aircraft types operating in the NAS under Special Airworthiness Certificate — Experimental Category. With current rulemaking under way, we are expecting small (less than 55 pounds) UAS(s) to operate starting early in 2013 under day, visual flight conditions.