Found at: http://www.army-technology.com/projects/skylark-II/skylark-II3.html
I Really like the simplicity of this one - though I'm not sure how it lands. Is there anything like it in the hobby market?
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As for the plane, it looks like a super slow stick with a 2 liter soda bottle, for the cheapy DIY market anyway. :)
In operation.
Lots of close-ups.
Thanks for the link! The Germans were definitely ahead of their time in aircraft design. I swear I saw a MiG-15 in there somewhere....
Tom
https://www.youtube.com/watch?v=YTM3X8JlHeI
With onboard camera.
Basically a shakemaster.
About deep stall, the larger surface you move, the larger risk you take.
Yes I know for free flight sometimes you would like to lift leading edge of the wing and trailing edge of the horiz. stab. But this is mostly for F1A glider that sometimes can 'escape' even with horiz. stab popped up.
In practice all this is creating Osprey class problems.
The only thing I know, at F1E models, the angle of the chord of the horizontal and the axis of the fuselage is 43˙at deep stall (they turn the horizontal like most FF gliders and Skylark as well).
All is good, but modifying estar elevator... making if popping...
Let me share a story with you.
My UAVs often take-off as a kind of RC truck loaded with useless electronics toys.
Once upon a time I induced oscillations in pitch (I swear it was intentional) and the battery from the nose felt off at 80m thrown up at very nice parabola, as in the books. At this stage I was trained enough to look all the time at the small object, because the larger wreckage you CAN find in the grass, if the scotch tape can hold things together. So I watched with a professional calm at heart as one more costly flightpower lipo landed in front of me making a small hole in the ground. It was 3rd lipo supposedly lost in stupid, hasty way and I didn't even said ouch - you cannot call yourself and idiot more than once per day, it stops being self-convincing. In the corner of my eye I quickly realized something funny happened to EasyStar. Because it lost 250g ballast from the nose, its COG ended somewhere 30mm behind wing's trailing edge. The result was immediate half-loop, then slow few (4-5?)m/s descent to the ground maintaining unbelievably stable upside-down posture (remember no battery on-board at this stage), landing on wingtips and rudder. 0% damage. Battery was literally returned to 'good shape' (whatever it means) by twisting. The runway was repaired by a single kick.
A clean job.
If the WWII would have endured only a few month more... the outcome would have been whole lot different. ;-)
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