April 2014

Experimenter is a magazine created by EAA for people who build airplanes. We will report on amateur-built aircraft as well as ultralights and other light aircraft.

Issue link: http://experimenter.epubxp.com/i/287214

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Page 30 of 38

EAA Experimenter 31 135 ENGINE TORQUE (MOGAS, no hydraulic governor) 130 125 912 iS 912 ULS 120 o rque [Nm] 912 iS Sport 115 T o 110 fuel efficiency by switching to a lean ECO mode once the throttle is pulled back to a setting below 97 percent. All this can be monitored on the proprietary (or third-party) engine instrument in a cockpit. The biggest advantage of the 912 iS Sport versus 912 ULS is its lower fuel consumption. Real-life flight tests showed a fuel economy improvement of up to 36 percent as compared to the carbureted Rotax 912 ULS engine. The new 912 iS Sport, according to Christian Mundigler, manager of Rotax Aircraft Engine Sales, is not going to supplant the 912 iS, but it is an easy guess that OEMs and other buyers will opt for the 912 iS Sport and the 912 iS will likely disappear. According to Mundigler, all 912 iS en- gine owners who wish to upgrade to the 912 iS Sport will receive a retrofit kit for free until October 31, 2014, and only will be charged for labor costs. From Novem- ber 2014 on, the retrofit kit will be an op- tion, but the price is not yet determined. Rotax has retrofit kits on hold for all the 912 iS engines already sold (more than 500 units). The price of the 912 iS Sport will be held at the same price as the 912 iS until October 31, 2014. The certifica- tion and the TBO for the new 912 iS Sport are the same as for the 912 iS. Marino Boric, EAA 1069644, is an aeronautical engineer and holds a private pilot license in Ger- many with commercial and instrument ratings (CPL/IFR). He also fl ew as a military pilot. 50ft 912iSSporttakeoffrun 40ft 45ft 30ft 35ft f t] 20ft 25ft Altitude[ f 10ft 15ft 0ft 5ft Distance[meter] 912iS 912iSSport E A A E X P _ A p r 1 4 . i n d d 3 1 EAAEXP_Apr14.indd 31 3 / 3 1 / 1 4 9 : 4 5 A M 3/31/14 9:45 AM

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