Viking Engine in a RANS S-21

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

  • 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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Joe Kanuck is now a member of Viking Aircraft Engine Forum
Feb 22
Don Freimark PP 650hrs current in a c172-based in Milwaukee,wisc, Stewart Staudinger and Laurence Jones joined Viking Aircraft Engine Forum
Feb 1
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.

The engine “Know” what the temperature and manifold pressure is. From this, the correct amount of…"
Jan 23
William Batten replied to William Batten's discussion Altitude Compensation - Fuel Mixture
"Thanks. How about the Turbo 195 - does it lean with altitude like the 130?

Bill"
Jan 23
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
"Thanks! I have another newbie question. Since the Viking engine is built to automotive tolerances regarding piston to cylinder clearance - is preheating required in cold weather?"
Jan 23
Jose P M Almeida replied to bob noffs's discussion fuel for 110
"Hi Bob. Yes you are right. The manual says maximum of 15% but all auto gas here in Brazil has 25% or 27% ethanol. Since I am monitoring closely and I had no issues with 90 hours of flight and it is a very clean fuel, the only concern would be the…"
Jan 7
bob noffs replied to bob noffs's discussion fuel for 110
"thanks jose. isn't 25% a little high for this engine?"
Jan 7
Jose P M Almeida replied to bob noffs's discussion fuel for 110
"Hi Bob. My 110 engine has 90hs. I use auto gasoline here in Brazil with 25% ethanol. It has 95 octane. I used 100 LL only once just to test. Saw no noticable difference."
Jan 6
Bill Encke is now a member of Viking Aircraft Engine Forum
Dec 21, 2020
Eric Johnson left a comment on Recent Activity - Add Comments, Videos and Pictures Below
"Chane, sorry, I misread your name.
I did some experiments with the coil spring, compressed it with a hydraulic press on a scale until I didn't dare compress any more.
Viking steel bungee spring compression rate

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Dec 14, 2020
Chane Burk left a comment on Recent Activity - Add Comments, Videos and Pictures Below
"Thanks Eric,
I started my 801 in 2008. I’m getting close to finishing it now and my original bungee is sagging. I would rather change it for a spring than buy a bungee that I’ll have to change every year.  I just wanted to make sure the Viking…"
Dec 13, 2020
Eric Johnson left a comment on Recent Activity - Add Comments, Videos and Pictures Below
"Hi Chuck. Yes, I put a steel bungee on my 801. Haven't flown it yet, but did a lot of taxiing and it seemed to work fine. Compresses about an inch, and has another 3 inches of travel.
The inner diameter of the tube seemed to be a little tight and…"
Dec 13, 2020
Chane Burk left a comment on Recent Activity - Add Comments, Videos and Pictures Below
"Is anyone flying an 801 with the steel bungee? "
Dec 8, 2020
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
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…
Dec 6, 2020
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