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Viking Engine in a RANS S-21

Posted by Branden on May 23, 2020 at 4:08am

Hi all,

I'm very curious about the Viking engines for the RANS S-21. Anyone else building a S-21 considering a Viking? 130 vs Turbo? I've seen the S-20 with the 141 wing on Youtube and it seems you get good performance with the 130. I'm also considering the Titan IO-340, but cost and complexity of installation with the Titan causes me to look seriously at Viking. The Viking installation look very clean and simple.

My mission will be fun flying STOL type ops off-field, local airport flights at sea level, and sometimes to airports at 4000-5000 ft elevation. I will travel long distances a few times a year for things like Oshkosh.

Max gross weight of the S-21 is 1800lbs, but I imagine I'll fly mostly at less weight. I imagine empty weight will be 930-950 if I choose the Viking 130. What performance can I expect with a Viking 130?

I'm not opposed to the turbo, but concerned about weight on the nose and turbo reliability.

Thanks,

Branden

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Replies

  • Viking Aircraft Engines May 23, 2020 at 8:01am
    We do have some installations here. Alissa at Viking can get you contact info of these great builders and pilots
    Performance is close to the Titan engine, even with the 130. Adding our latest development of a variable DUC propeller makes it a perfect combination

    https://www.vikingaircraftengines.com/customers
    Customers — Viking & Valkyrie Power
This reply was deleted.

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Viking Aircraft Engines replied to William Batten's discussion Altitude Compensation - Fuel Mixture
"The modern engines do not care what altitude they are at. The engines do not “know” what altitude they are at. They do not need this information.

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Viking Aircraft Engines replied to William Batten's discussion Altitude Compensation - Fuel Mixture
"Only if you would like to do so. The engine will start and warm up on its own."
Jan 23
William Batten replied to William Batten's discussion Altitude Compensation - Fuel Mixture
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Jan 7
Jose P M Almeida replied to bob noffs's discussion fuel for 110
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Viking Aircraft Engines replied to William Batten's discussion Altitude Compensation - Fuel Mixture
"Yes, it does that and there is no altitude limit for this"
Dec 6, 2020
William Batten posted a discussion
Altitude Compensation - Fuel Mixture
I'm new to this forum and new to Viking Engines. I'm early in my research. My question is: Does a Viking 130 engine reduce the fuel rate automatically through the ECU as altitude increases - to lean out the mixture? If so, is there an altitude limit…
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Dec 6, 2020
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