Wird hier noch mitgelesen bzw kommentiert? Kann ich mir dir Vortex Teile auch selbst an die Fläche kleben? Ja, mir Jd bewusst das diese an bestimmte Positionen muss, hätte eine FK14 mit Vortex fürs aus messen für meine Maschine. LG
At 2:34 you can see the more dramatic effect is the lateral movement, not the boundary layer backdraft forcing the strings up from the wing. The vortex generators aren't working as described.
Fantastic video! Thank you for taking the time and also sharing the video! VG clearly make a significant difference to stall speeds at different configs. The transcript is pretty hilarious though - I don't think the researcher actually says "and takes a sexy" at 12:11 🤣
Why were they put on the tail? What were the results? Was there a benefit? The Wheeler has issues with tail effectiveness at high AOA and side slip. The speeds quoted could be misleading. You could have attached flow on part of the wing but the airplane could be descending I.e. at 0.9g instead of 1g. So the speeds, if you are using them to determine your operating speeds you should correct them by dividing them by the sq root of the vertical acceleration. This is a requirement for defining reference stall speeds on big airplanes. You can’t really claim a super low stall speed if the machine is falling out of the sky and you can’t arrest the sink.
Very interesting experiment! Seems like the ailerons work well past stall angle of attack of the wing. Reminds me of the zigzag tapes we put on som gliders. Low speed handling and induced drag usually improves, at high speed drag can increase but not by much. But it seems to depend on the airfoil shape. If I remember correctly the chordwise placement of turbulator tapes is also rather is critical.
My question is what were the level cruise speeds differentials with VG and without VG. Was it a large difference between the two. My research has found that it about a 1 to 2 kts difference in level cruise. As with Aviation, there's always a give and take scenario.
Looking at installing VG on my upcoming plane and want to ensure that I fully understand the need/safety implications/lower stall speeds/lower takeoff and Landing speeds that VG provides.
Hallo Dani, sehr gerne. Habe vor kurzem einer Lancair Legacy im Birrfeld das sichere Fliegen beigebracht. Einen Bericht darüber gibt es in der AeroRevue Nr. 2/2021. Grüsse Viktor Strausak
@@hbykv ...und weil ich bei der Arbeit (Medienbranche) die AeroRevue durchgearbeitet hatte, bin ich gestern Nacht auf diesen Artikel bzw. link gestossen + hab geantwortet.... :-) // P.S: links kommen noch (= bin aktuell am Arbeiten)....... = leider kein pensionierter Ex-Swissärlär..... :-)
We added a VG kit to our stock standard 160hp Cessna 172N model a few years back and it changed the whole aeroplane. The first Cessna helicopter! The very low speed handling and very slow speed stall characteristics were there to see in the very first flight. Quite amazing really. I wouldn't want to go back to it's previous life not having VG's knowing now what VG's have done to it. In some configurations it seems almost impossible to stall..the ASI reads as low it can go on the dial. You don't even notice any change in IAS. It's only a 100 knot 172 afterall. So that's Yes Yes Yes Yes for VG's..
I see, that they delay the stall but then when the stall does happen it is quicker and more violent. They would also effect fuel economy at the cruise. There's a reason that small plane manufacturers don't use them and I suspect this is why.Many thanks to the poster for doing this video, well done.
Back when I was a CFI, one day I covered the wing of our trainer aircraft with such yarn strips and flew it all day like that, showing student pilots the visual effect of stalling. They were all delighted to see first-hand something they had only studied in textbooks. ...I take it those VGs are not certified for general aviation aircraft? How does one go about installing them? Will the airplane not be illegal with such a radical aerodynamic modification, however beneficial it might be? Would the airplane need to be re-registered as "experimental"?
0:17 This aircraft is experimental. They just had to update the magical paperwork that allows the plane to fly, I assume with data from the VG manufacturer and the new performance data from test flights. I think you can get them for non-experimental, but the manufacturer has to have done all the magical paperwork.
@@jimstanley_49 Somehow I managed to miss the big "experimental" painted there. ...And "magical paperwork" describes it nicely. Thanks for chiming in. Cheers.
Os geradores de vórtice aumentam a energia da "camada limite" (a fina camada de ar mais próxima à superfície da asa). Ao fazer isso, eles atrasam o descolamento da camada limite e com isso conseguem uma redução da velocidade de estol do avião, como mostrado no vídeo.
Swiss people very often speak German, French, English and a little Italian. This is how we usually talk and everyone can understand something. We made the video recordings for safety and not for RU-vid.
