News, facts, and comments on the coming revolution for piston-engine aircraft. News of April 11, 2009 Diamond Air: Re-engined Diesel Twin Star EASA Certified According to AVWeb, the European Aviation Safety Agency (EASA) has certified the Diamond DA42 NG, which is powered by Diamond s own 170-horsepower Austro 300 diesel. The certification came less than a year after Thielert, whose engines powered first generation Twin Stars, became insolvent, resulting in serious maintenance issues for DA42 owners. The EASA certification means Diamond can start delivering Twin Stars again in Europe (it has 40 on the line) and also start turning its attention to retrofits for existing owners who want to swap out their Thielerts. 'We are focusing our efforts to achieve the certification of the optional upgrade of all delivered DA42s with the Austro Engine, such that all customers can benefit from these improvements along with comprehensive customer support for their engines,' said Diamond CEO Christian Dries. Although the EASA certification is valid only in Europe, it should be fairly straightforward to get it recognized everywhere else, and Dries said Diamond is working on it. Dries says that even though the new engine pumps out 20 percent more horsepower, it actually delivers better fuel economy than the Thielerts while giving the aircraft a higher gross weight and better performance. As part of the NG package, the new DA42s come with Garmin GFC 700 autopilot, and they're ready for Garmin synthetic vision. The initial TBO of the new engine is 1,000 hours, but Dries said the goal is to extend that to 2,000 hours. It's not clear how that will translate to North American customers where the Thielerts are on a 1,000-hour TBR (time before replacement). The company is also working on a maintenance program that will undoubtedly address some of the cost and AOG time spans that affected Thielert operators. (AVWeb 4/11/09) Comments: Thielert claims that the Austro engine is only certified for the new DA42NG specially modified to accommodate it, and cannot be retrofitted on an older DA42, or even less DA40 diesel or Cessna 172Thielert. Anyone who can provide information on this contradiction is welcome. Meanwhile, the continuing dispute between Diamond and Thielert is not very helpful. As well, Christian Dries claims that the Austro engine is 20% more fuel efficient than the Thielert. It may be true since the Thielert was not very convincing in terms of Specific Fuel Consumption (SFC), but 20% is a lot. We would prefer to know data on the SFC, and better know the fuel flow at best glide speed. posted at 6:40 PM

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Mission Statement

Every month: news, facts, and comments on the coming revolution for piston-engines aircrafts between 130 and 400 HP: Retrofitting a diesel engine to run on Jetfuel or Kerosene, reduce Gallons/Hour by some 30%, eliminate ignition systems (magnetos, spark plugs) and their problems, eliminate mixture control, increase TBO to 2,400-3,000 hours, increase performance between 6,000 and 12,500 ft., and drastically reduce Operating Costs.

The letter is intended for piston engines aircraft owners, manufacturers, fleet operators and FBOs, re-manufacturers of engines for these aircrafts, manufacturers of engine components and ancillaries, and all professionals acting in decisions of engine exchange or refitting at TBO, in North and South America, Pacific Rim, African continent, and all parts of the world were Avgas, Mogas, Kerosene and Jetfuel are available.

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