by fastj22 » Fri Nov 02, 2012 11:10 pm
Jan is posting performance results from a single implementation of Viking engine on a Sonex airframe. And he's promoting those results as what you should expect if you install his Viking on your Sonex. I don't begrudge his success with the Sonex, but he needs at least a few more installations before he can claim success.
There are so many other factors that Viking has posted regarding their installation. Have they done compete flight testing? Have they spin tested their installation? Did counter balancing the engine with a tail mounted battery change the spin recovery? Has moving the engine so far forward impacted the factory handling characteristics? Stall speed? Accelerated stalls? Is a Viking/Sonex expected to fly like a Jabiru/Sonex? Should Sonex be responsible for such alterations? Or the builder? If someone gets in trouble with a Sonex/Viking, who gets the bad press?
Jan has taken an adversarial position with Sonex, yet is trying to market his engine as the best solution to a Sonex. Not a good partnership if you ask me. Much like he did with the RV12.
John Gillis
SEL Private, Comm Glider, Tow pilot (Pawnee Driver)
Waiex N116YX, Jabiru 3300, Tail dragger,
First flight, 3/16/2013. 403 hours and climbing.
Home: CO15. KOSH x 5
Flying a B-Model Conversion (Super Bee Baby!)