Robert Adam writes to let the CAFE Foundation know that the 2015 Green Speed Cup is underway, just now finishing its second of three days of competition. Think of a Green Flight Challenge with a need for green speed balanced against a need for economical use of energy. Taking place out of Strausberg Airport in Germany, the event consists of three days of tasks which always bring the competitors back home ever day. “Every task comes with a minimum energy consumption. It will be derived from the energy used by a reference airplane on 10% of the tasks length at MCP. Combustion and electric aircraft use different reference airplanes. Class definitions All aircraft capable of taking off under own power, are allowed in the following classes: Electric – Class (but alas, no entrants this year) Electrical driven aircraft All aircraft with one to four seats Up to 2700 kg ( MTOW 5950 lbs) Maximum task distance of 400 km (216 …