XK A160-J3 Skylark 4CH 650mm EPP RTF RC Airplane from Banggood - Part 4: Serious Control Issue скачать в хорошем качестве

XK A160-J3 Skylark 4CH 650mm EPP RTF RC Airplane from Banggood - Part 4: Serious Control Issue

I ordered this ready-to-fly (RTF) J3 Cub model from Banggood on the first week of September right before Labor Day. It was on sale at $89.99, plus $2.70 for shipping and $1.80 for shipping insurance, so I paid a total of $94.49. However, the price may have changed, but I suspect it will go back on sale again if you are willing to wait: https://www.banggood.com/XK-A160-J3-S... It was not in stock when I placed the order, but I did not care since I was not in a hurry to receive it. It was delivered to my home late October. I think what I paid was a very good price for such a complete package of a nicely-sized parkflyer with a respectable 650mm wingspan. It is not too small and it is not big either. In the first and three episodes, I showed the unboxing, the assembly, and the maiden flight:    • XK A160-J3 Skylark 4CH 650mm EPP RTF ...      • XK A160-J3 Skylark 4CH 650mm EPP RTF ...      • XK A160-J3 Skylark 4CH 650mm EPP RTF ...   My initial observations were all good. However, as I watched more reviews of this airplane on YouTube, I realized that many people have had or have been having an issue they called a "tip stall". The plane was becoming unstable during some turns and then stalling or going into a spin without warning. A video posted by YouTuber Albert Kim was especially curious, because his plane crashed during a turn, although it had plenty of airspeed:    • Multiprotocol Module Tutorial // XK A...   Watch that video at 9:52 and at 10:12. After watching that video, I became concerned and wanted to investigate this issue further to figure out what is the culprit of these crashes and if they are systemic to this airplane, or even to the whole XK line. In this video, I am presenting my findings and what I believe the cause of this issue is. And my findings are really bad news in my opinion. I think this product should have never been released for sale. This instability issue seems to be widespread enough that I believe it is a design or programming flaw of the stabilization system. Now I am on high alert for any XK products using this transmitter/receiver/stabilization combination, since I have previously crashed my XK A800 glider and XK A430 Edge aerobatic plane in very similar ways. Both of these XK models come with the same transmitter, so I am assuming they also have the same 3D/6G stabilization system. I am going to continue testing my theory on these models as well and post those videos soon. If you own any XK airplanes, I suggest you check them before your next flight using the procedure I detail in this video. GOOD LUCK! Thank you very much for watching. If you find this video useful or informative, please give it a thumbs-up. If you are not already a subscriber to Props & Wheels, please consider subscribing, so you do not miss new content we are adding almost with a daily cadence. I hope you are part of this amazing hobby, or at least considering joining, because it is so much fun and rewarding. Stay safe and healthy! Cheers!