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Europa Trigear with Rotax 914 running out of steam at FL200?

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Roland

Joined: 30 Nov 2009
Posts: 334
Location: EDLE

Posted: Thu Apr 19, 2018 4:44 am Post subject: Europa Trigear with Rotax 914 running out of steam at FL200?

Hi Europa Folks,



maybe some of you (especially in the US?) with a Rotax 914-powered Trigear can help me evaluate the high altitude performance of my bird.



It is an XS TG 914 (no Intercooler) with Airmaster CS-prop. On two flights yesterday (DA around 20.000 ft - ISA+10°C) at a mass of around 560kg (1235lbs) my Europa did 105KIAS at WOT and 5500RPM (I have no MP-gauge). Although still climbing with around 500FPM at 75KIAS I instantly loose altitude when transiting to Level flight and handling feels quite a bit "spongy". 



Erich Trombley posted a picture of his EFIS schowing 126KIAS with his Mono N28ET at a DA of 19500ft at 5310RPM.



The fuel consumption up there was only about 21 l/h (5,5 GPH), so that my assumption is simply, that the 914 can't deliver the appropriate power for the heavier and more draggy Trigear for better performance. 



At FL100 at MCP and a FF of 26 l/h (7 GPH) I see 130KIAS. 



Any idea what to expect up there at FL200?



Regards

Roland

PH-ZTI

XS TG 914

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