The testing of AirMule is continuing. Initial hovers with Controp's D-STAMP payload (see April 2012 update) have shown a stable and noise free image of a landing marker placed on the tarmac. The next steps involve estimating the position of the marker relative to the aircraft and having the FCS plan and execute an autonomous final approach for landing next to the marker. We expect this phase to be completed in 2-3 months.
Another development is the completion of 'in-house' manufacture of 12 composite rotor blades (see picture below) for our two new six bladed rotors that we plan to install on the aircraft next month. These rotors will replace the present, four bladed rotors that have been used since the beginning of 2010. The new rotors have the same diameter and RPM as the original four bladed sets but are expected to increase the payload by approximately 200 Kilograms and are much closer to the final production version than the initial rotors were. The design of the blade (section, planform, layup, wash-out, stress analysis etc.) as well as construction of tooling, rotor hubs, variable pitch mechanism, blades and all retention and other associated hardware have all been carried out by the engineers and workshop personnel at Urban Aeronautics. The blade design complies with the loads specified the FAA's FAR 35 standard for propellers.