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Well, how did it all start?the whole thing started with this video:I began to look for every tiniest bit of information about this machine. All I found were just a couple of vids with intros presenting some of its characteristics.Those were:Weight: 108-150 g.Length: 670 mmRotor diameter: 430 mmRotor blade width: 41 mmBattery: 2S , 250 Mah and moreMini servos: 2.8-5 gEngine: ST-2204Controller: 6 А. I never found drafts (((Well, it’s ok. I still have the basic characteristics and appearance, so we can start )))There it went.I hand-sketched it using pictures that I had, and it did match the original pretty much. Then I zoomed in, copied it onto thick paper, and made templates.The original set:The rotor diameter was in my hands, so was the chord, and the design was quite simple. I made two rotors.I reinforced the corrected edge with a D1mm carbon rod.Now I need to make two props and keep in mind that they should not be identical.They must be symmetrical.The butt is 10 mm thick, and it is the characteristic that defines propeller pitch, which remains the same all the way down the prop’s length.Checking the weight:I suspect the original ones weigh at most 4-5 g.Final assembly:When you finish assembling it, attach a brass tube to the end of the axis to form a bushing.This is what the prop’s axis looks like. Components:Carbon axis - bead - brass tube - large bead and linkage detent )))Not tired yet? Then a few words about the fuselage.The technology is pretty standard: cut the underlay according to the template and put the whole thing together.Rough weighing: We have 69 g of weight: two 5 g servos + pull rods + a three-channel receiver.I made the canopy out self-adhesive tape and stuck two pieces at both sides. Not bad at all )))I added a bit of reinforcement to the front just for landing gearThe little servos with "mischievous pull rods" )))Here is the completed model;The nose features reinforcement;Carbon X-supports for the wings;Landing gear installed.The center of gravity should be about 5 mm ahead of the propeller's spin axis.Weight totaled 190 g.I did not make much fuss about weight, because there was no chance I'd ever fly it indoors.I just reinforced whatever I could )))The engine provides a thrust of 400 g, and it is powered by a 460 Mah battery. I used a 12A controller.Printout drawings: (нарезка.rar) Provided by: Igor Cо, Saransk City Now watch it in action!I flew it only once, it was way too slow and could land almost vertically. Quite unusual. However, if handled properly, it does wonders, as you could see in the first video.Here is another little drawing that I found among my old papers. It is not exactly the described gyro, but a similar one. Maybe you will find it useful: