I'll admit that's impressive... yet keep in mind that includes about 1 lb of canister exhaust... The 26x10N prop is one not often spun and will be hard to get comparable RPMs from 75-80cc class engines. It would be nice to see what a ZDZ running the same prop would do on a stock muffler and LMB can. I think you'd be very surprised.

Being that the video is a marketing video from a distributor, I still look forward to enduser reports with various props so we can directly compare it to other engines spinning the same prop. For sure it has more power than the DA50, but them again it should being a 58cc engine and weighing a full lb more.

The stock muffler for the DAis under 5 oz... and inv. pitts for the 58 will be around 10 oz or so... another 1/4 lb difference.

Again on this airframe, AND if it can come in at 16.5 lbs with a DA50 and stock muffler, that will put a 58 powered version at 17 3/4 lb. It would then be a matter of preference... More power or better wingloading. both will power it very well... but for me 1.75 lbs is a lot of difference on a 1468 sq. in. aircraft and would definitely result in a difference in flying.

It won't be long now before we know the out of box/in the air weight of the components. Add 6.75 lbs (because of the extra 2 servos) and I'll know within a couple oz. of what one built by me would weigh all up dry.