The Green Speed Cup – Fourth Edition

Dean Sigler Diesel Powerplants, Electric Powerplants, GFC, Sustainable Aviation 1 Comment

Robert Adam helps run the Green Speed Cup, a time, speed and economy run for aircraft in Germany.  The rules for this year’s contest elucidate the intent and ambitions for the event: “The GREEN SPEED CUP is an aviation competition focusing on efficient flight. The emphasis lies on fast and energy saving transportation. The competition is meant to develop new methods to reduce energy consumption of motor driven aircraft using external energy sources like lateral winds and updrafts. In making the ability of certain aircraft and techniques transparent, the competition shall set new standards in general aviation.” The Cup provides a sounding board for discussion of energy efficient flight and the changing experience of flying while exploring new techniques and …

Green Speed Cup Day Two – A Clear Winner

Dean Sigler Diesel Powerplants, Electric Powerplants, GFC, Sustainable Aviation Leave a Comment

Robert Adam, one of the organizers of the Green Speed Cup in Germany and pilot of the Flight Design CTLS that ended the competition in seventh place, shared some information on the challenges faced by pilots in this year’s event. “We had 12-15 knots crosswind today (only a little less yesterday) and Tim-Peter (-Voss) managed this demanding taildragger (the SPACEK s.r.o. SD-1 microlight) calmly!”  This very light and short-coupled airplane flies with a variety of two- and four-stroke engines, but Voss’ had a Verner JVC-360 four-stroke unit of 38 horsepower.  It averaged a little over four liters per hour fuel consumption per 100 kilometers (59 mpg) over the practice day and two contest days.  In the Green Flight Challenge, it would …

Green Speed Cup – Year Two, Days Three and Four

Dean Sigler GFC, Sustainable Aviation 1 Comment

As the Stemme Green Speed Cup speeds into day five of a six-day series of challenges, the leaders are all – little surprise here – Stemme aircraft. Markus Scherdel took first place on day three’s task, a 346.1 kilometer (214.58 mile) triangle, with a new low in fuel consumption, 2.5 liters per 100 kilometers (94.08 mpg or 188.16 passenger miles per gallon) at an average speed of 142.2 kilometers per hour (88.16 mph). This is impressive because it comes close to requirements for Green Flight Challenge qualification. None of the five Stemmes competing managed less than 4.5 l./100 km. (52.26 mpg), right in Prius territory at much higher speeds. The Diamond DA40 TDI departed the contest because of other obligations …