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| yesterday in the afternoon i became quite courageous and took another flight in quite gusty wind. in was better than the first time, but i managed to let it drift away quite far and had to take 2 emergency landings: controlled fast sinking and not too hard landing, once out of sight. | yesterday in the afternoon i became quite courageous and took another flight in quite gusty wind. in was better than the first time, but i managed to let it drift away quite far and had to take 2 emergency landings: controlled fast sinking and not too hard landing, once out of sight. |
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| changed the design a bit. yesterday it was a ramshackle gaffa improvisation, but now the cap and the battery protector ring are firmly held in place by bits of velcro tape, easy to take off. the "noodles" (actually heating pipe insulation) are now very tightly fixed with zip ties. the whole cap-ring-landing gear stuff adds just 70 grams to the weight. and the whole thing looks really FAT in the air ;-) | changed the design a bit. yesterday it was a ramshackle gaffa improvisation, but now the cap and the battery protector ring are firmly held in place by bits of velcro tape, easy to take off. the "noodles" (actually heating pipe insulation) are now very tightly fixed with zip ties. the whole cap-ring-landing gear stuff adds just 70 grams to the weight. and the whole thing looks really FAT in the air ;-) |
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| Weight without battery: 580g [[BR]] * 10/03/08 on sunday we had a MK fly-in in a the rosental park, about 5 hectar of lawn. i took it quite to the limit (speaking of distance...) but managed to do without losses or even damage. others were not that lucky... for not even a week after my first flight, it's going really well. the foam tube / styro cap design (fixed with zip ties and velcro) proved really practical, low cost, lightweight and durable (survived 1 1/2 crashes with no visible damage, only the antenna now has a sportier angle ;-) ). visibility is really good as well though up to now only the antenna position and a white piece of paper mark the front i started flying with the lower styro protection ring but left it off after a while: it has to be taken off for battery change, and so far no glue has prooven stronger than velcro ;-) another drawback: in windy conditions it seems to increase the drag quite a bit. Weight with battery: 690g (without: 563g) I'll upload some pics soon... |
Name
L.I.F.E.kopter is the MK Project of ["SelectaT"]
L.I.F.E. stands for:
L (symbolizes the [http://en.wikipedia.org/wiki/Glider_%28Conway%27s_Life%29 Glider] in Conway's Game of Life)
I nverse
F rame
E xperience
... and of course for [http://en.wikipedia.org/wiki/Life life] and all around it!!!
Forethoughts
Based on the standard MK setup (FlightCtrl, BL-Ctrl 1.1 with hi-power MOSFETs)
I decided to try an inverse frame (propellers under the frame) for two main reasons:
- pushing props are supposed to be more effective than pulling props because nothing (no frame, in this case) is in the way of the streaming air - result: fewer swirls, higher efficiency, less noise (hopefully!)
- the frame ends (extended around rotors) can be used as rotor protection and feet at the same time (picture follows)
Apart from this, you can now use larger more UFO-like caps because there is more room on top of the frame 
Notes
- 06/02/08
- got me all the parts and a MC-16/20, started soldering (first time SMD)
- 14/02/08
- soldering for a week now, in what little spare time i have; not too bad, getting routine
- 18/02/08
- almost done with BL-Ctrl!!!
- 22/02/08
- tested and flashed BLctrl, all 4 thumbs up!!! attachment:sebas_regler.jpg
- 28/02/08
tested and flashed FlightCtrl, everything OK here too. And now for the frame...
- 29/02/08
- on this rarest day of them all, my frame is getting in shape! I decided to start out with the ordinary (non-inverted) frame to test everything and learn to fly...
- 03/03/08
last night at 1 a.m. sharp my kopter did its maiden flight. after ~8 hours of wicked wiring it took off in LiGi's living room and hung there for about 3 minutes (Ligi on the sticks, there was quite limited space). everything seems to be as it has to. did a few hops as well. now for the cap and some landing gear, think for a start it'll be the noodle style for me.
#&% weather!!! supposed to stay like this for 2 weeks now.
- 05/03/08
- had a finishing session last night and now it's official: it was worth it all! exactly 4 weeks of work (and fun), and in the morning today i had a first outdoor flight in the rosental park. there was a quite gusty wind so the drift was a pain in the ass, but i managed to do a few tipsy laps. tonite as the (for now) final act the lower styro ring will be fixed.
the cap is a 20cm styro half sphere (16 grams), feet from insulation foam (26 grams)
- attachment:seba_kopter.jpg attachment:pic03.jpg attachment:pic1.JPG attachment:pic02.JPG attachment:pic05.JPG
- 07/03/08
- yesterday in the afternoon i became quite courageous and took another flight in quite gusty wind. in was better than the first time, but i managed to let it drift away quite far and had to take 2 emergency landings: controlled fast sinking and not too hard landing, once out of sight.
changed the design a bit. yesterday it was a ramshackle gaffa improvisation, but now the cap and the battery protector ring are firmly held in place by bits of velcro tape, easy to take off. the "noodles" (actually heating pipe insulation) are now very tightly fixed with zip ties. the whole cap-ring-landing gear stuff adds just 70 grams to the weight. and the whole thing looks really FAT in the air
Weight without battery: 580g
- 10/03/08
- on sunday we had a MK fly-in in a the rosental park, about 5 hectar of lawn. i took it quite to the limit (speaking of distance...) but managed to do without losses or even damage. others were not that lucky... for not even a week after my first flight, it's going really well.
the foam tube / styro cap design (fixed with zip ties and velcro) proved really practical, low cost, lightweight and durable (survived 1 1/2 crashes with no visible damage, only the antenna now has a sportier angle
). visibility is really good as well though up to now only the antenna position and a white piece of paper mark the front i started flying with the lower styro protection ring but left it off after a while: it has to be taken off for battery change, and so far no glue has prooven stronger than velcro another drawback: in windy conditions it seems to increase the drag quite a bit. Weight with battery: 690g (without: 563g) I'll upload some pics soon...