Cobra
- Ersteller gghisleri
- Erstellt am
Peter Wick
User
wow....thats really something
another
another
this is the number 2...
the wingspan including winglets: 325cm
more info www.voloinpendio.it
another
this is the number 2...
the wingspan including winglets: 325cm
more info www.voloinpendio.it
UweH
User
Hi Beppe, it´s a nice and unusual design, i hope for you it flies well.
I´m no flying wing expert at all, but only a hobby flying wing aerodynamics.
I´m speechless about the flap divison. The Cobra- wing has the design an the back sweep of a less swept plank, but the flap division of a highly swept flying wing.
I wonder if we learn more about the design ideas and flight characteristics oft the Cobra-design with this flap division as we can read from beautiful ground-pictures and flight descriptions like
Best luck for the remaining flight testing and prying regards,
Uwe.
I have some experience with flying wings, I fly them on slope only, so, starting with the Zagi I went trough own designed PSS models such as X4 and Horten 229, published in Aufwind, I also designed X-wing wich actually is a model published on Flying Models, and SiGh in cooperation with Simone Nosi, an experimental F3F wing.
SiGh was published on RCSD the american in-line magazine.
Cobra was designed a lot of years ago when a leading italian producer asked for something new.It shoud have been a all-around model with no particular goal to reach other than to be pleasing and, hopefully, best selling.
The project was abandoned.
A friend of mine laminated two half wings that looked like to be a carbon treacherous weapon, so they are still there unused.
Last year my friends at Voloinpendio wanted to produce a little plank but when I showed them Cobra they fall in love with it, so moulds were CNC produced and prototype moulded.
So, the idea behind Cobra is almost told: originality, sexy courvaceous lines, all weather model.
Flying wings are tough to land on the slope, so I thought that the flap, placed mostly near CG could be used as butterfly to slow landing approach leaving elevons ( elevator-aileron ) to be completely free to do their work.
Test flight testified the ability of Cobra to fly thermals.......when found.
At launch the model showed to be nose heavy and required a fair amount of up trim, before to have it correctly trimmed it lost height and, as usual in this situation, no thermal was found, so I started flying around at no avail, to make a long story short, I regained launching height and choose to go out again as it looked like that conditions were turned good again.
I was wrong and the Cobra went even lower, I thermalled with little bank and with steep bank and the model flew both great, when I newly reached landing height I put it on the ground.
So I can't say how Cobra flies aerobatic or how fast it goes and if butterfly is working.
Leaving ailerons free from mix I had a mix on internal surfaces that lowers them just 1 degrees and they worked as do flap in a normal model: increased lift and a slight up trim.
More in the future.
UweH
User
Thank you very much for the infos Beppe, I´m at vacation and maybe I answer later again.
Thanks for the nice picture and I wish you much fun and good luck with the flight testing
Regards, Uwe
Gast_53593
User gesperrt
Hi
es wäre schön wen die Beiträge für unsere nicht englisch sprechenden / Lesenden User auch ins Deutsch Übersetzt würden ,
und man nicht immer das dan Über einen Übersetzer laufen lassen müsste ,
Norbert
es wäre schön wen die Beiträge für unsere nicht englisch sprechenden / Lesenden User auch ins Deutsch Übersetzt würden ,
und man nicht immer das dan Über einen Übersetzer laufen lassen müsste ,
Norbert
UweH
User
Ich glaube nicht dass die Verständlichkeit besser wird wenn jemand der nicht Deutsch spricht den Text über seinen Übersetzer laufen lässt und dann hier nur in google-Deutsch postet. Wenn jemand der ein bisschen Englisch spricht das Original über seinen Übersetzer laufen lässt sollte die Verständlichkeit besser sein
Ich würde mir wünschen dass bei deutscher Übersetzung die englische Version mit gepostet wird.
Beppe, if you want to post in German, please write the text also in English, google - translation is often funny, but even difficult to understand
Gruß,
Uwe.