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LOL! Thank you Shelton for pointing that out! Transformed my whole view of the forum to a better direction. The advert at the bottom of the page was pretty annoying, but didn't even come to my mind that I could actually disable it.

Well done creast! The case looks beatiful. Going to be watching this thread closely. I would be interested to know how are you planning to hold the case to get the cylinder center lines to meet the crankshaft center line precisely and bore the cylinder mounts? Is it a one setup operation with...

Anyone using Taig mills in Europe? Is there a dealer somewhere around here. Got me interested in the Taig Mill as searching a suitable first desktop CNC mill has proven a challenging task. Been looking around for two years now it seems and haven't found a suitable used option. New machine market...

Trying out the new propeller outside

Yes. That is one of the awkward features of this engine definately. The case is held together only by the four bolts through radially placed flanges and the cylinder sits in a groove machined to the case. This was first of all a tough one to get concentric in a lathe and needed accurate inside...

Propeller taking shape

I did some preparing and planning on the propeller today. That needs to be carved next!

Oh and yes the previously linked casting videos are of the Monsun build. That was my first time casting aluminium and I made those videos to hopefully help other newbies with casting. They are not that good in terms of technical quality but show the major parts of basic sand casting I hope. On...

Thank you for the kind comments! Yes the bore is 20mm (19,96 to be exact) and the stroke is 20mm aswell. That I can’t easily measure more accurately. I know I drilled the offset turning jig right at 10,00mm mark to turn the crankshaft pin. The case surely seems ’bigger’ as it has a lot of empty...

May I present you a 4-stroke model aero engine ’Rolssi’ a true Finnish classic originally designed back in 1936 at Vyborg Finland by Urho Purhonen and Aarne Heikkinen. My friend and model engine builder colleague KalleR made the CAD model couple of years ago and built a fine example of this...

Hi Patrick, I did three ports separated evenly as on the plan. 0,120 and 240 degrees. The front one being in the middle of the engine center line. I have thought about the port alignment aswell and tend to think that the alignment doesn’t really matter as it really is not referred to in the...

Hello Patrick! I don’t actually recall anything being off in the actual plans. I did build pretty much as per plans. The text and methods described in the original build article was something I did not follow in many places. Partly because of the language barrier and me not quite understanding...

Here is the article by KenC on the process of fitting and finishing the piston and cylinder. Highly recommended! I did follow these instructions carefully and have done since with good success. THE PROCESS THAT ALL BEGINNERS FEAR: FINISHING AND FITTING THE PISTON AND CYLINDER by Ken Croft -Olli

I did have some Dragonflea plans on my hard drive and just sent a copy to you via an email. rgds Olli

It has a tendency to do so to almost everything! :)

Thanks minh-thanh, it runs nicely but is a bit of a handful to get going just by flicking 😅

Some running video today

Made a vid about the Super 11 DRO installs:

Sugden sounds:

Got a simple display stand done for the Antares.