Online Community of Zenith Builders and Flyers
I visited the aeromomentum.com website and found an interesting write-up by Mark, the owner of Aeromomentum. In it he discusses the engineering choices that led him to choose the line of Suzuki engines that he uses for aircraft conversion. Here's a link:
This is not "the one Aventura" -- rather it is the "First Aventura" with a Viking 130. I am sure that the owner did his due diligence and chose the Viking Honda 130 on that basis. Others chose the Aeromomentum. Both good choices.
So....let's then let the market tell the tale. Let's leave the "I am better" and let owners show the results of good old competition over time. No need to debate design differences.
Owners are quite capable of sorting things out.
Typically such brand reliability ratings are for the brand's entire line of vehicles. It takes quite a leap of faith to say that the overall brand reliability (as reported by consumers) relates in any way to specific engine reliability. While I agree that looking at specific engine reliability is useful and not to be ignored, and while it seems that looking at marine outboard ratings might be useful, this reference to overall brand reliability seems to me to be a red herring.
I thought there was an agreement that manufacturers (in this case Jan) are neither allowed to promote their own products in a competitor's sub-forum nor to bad mouth the competitor's products!?
I also find it quite funny that that the Viking supporters cry foul because Mark lays out in the video, in general terms, why he thinks that a lower weight is better than variable valve timing and why he prefers port fuel injection over direct injection. At the same time, they don't seem to take any offence in Jan directly attacking AeroMomentum, stating that he doesn't 'think anyone would argue seriously about the clear advantages of a direct injection fuel system on an aircraft engine, or modern variable intake valve / lift systems'. ;-)
Car manufacturers struggled for many years to launch direct injected engines, this technology is anything but trivial. Tons of information is available on the internet, including scientific research papers.
While I trust that the big car manufacturers have figured it out by now, all the calibration work goes out the window if an aftermarket ECU has to be used, like in case of AeroMomentum or Viking. Maybe it turns out that the Viking 130 will after 100s of hours still be trouble free - personally, I however rather prefer the reduced complexity of the AeroMomentum engine.
Interestingly, even Honda themselves is not using direct injection in their outboard motors: https://marine.honda.com/outboards/motor-detail/BF135-150
We have been watching you "almost fly" for some time. I am sure, one day you will. When you do, lets set up a basic cost / reliability / performance test.
Jan, the way you present yourself in this forum is a big reason why I'm happy that I ultimately decided against using a Viking engine.
Being an engineer myself, I truly appreciate Mark's knowledge, experience, thoughtfulness and agree with his reasoning. I also like that he is much more of an engineer than a sales guy.
Personally, I would really appreciate if you would stop spamming every other AeroMomentum thread with your aggressive Viking marketing.
As for "almost flying", you must be confusing me with somebody else!? As you probably know, building a plane is a long process, it will certainly take us quite a bit more time until the first flight.
Not at all true.
You are just protective of your investment.
I am an individual and I am a business person.
I don’t care what you, or anyone else think.
You deserve to order an engine.
You deserve to get the parts you ordered
You are entitled to get parts that actually fit your aircraft
You should expect that the the parts that you paid for should have been tested, fitted and working on your aircraft model and type.
You can continue to defend the choices you have made, it is all up to you.
Viking has a one day turnaround on any Zenith engine model. We don’t have an approximate delivery time, we don’t have an estimated weight, we don’t have thousands of undocumented airboat hours and we actually deliver what we sell
We are all entitled to our own opinions, but we are not all entitled to our own facts.