RE: F3A Judges Corner . . ask a question
Someone correct me if I am wrong, please, but I believe that there is 1 point downgrade for deviation "up to 15 degress", 2 points for deviation from 15 to 30 etc. So any visible deviation should be downgraded, I believe that actually you lose the first point as soon as the judge is sure that there was not a perfectly straight line.
Posted on: 9/25/2009 2:29 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9122257

RE: A Step Change in Judging - Improvement through technology
I absolutely agree with your point about gracefulness and presentation. This tread though is about "improvement through technology". So I think that some mental excercise in that direction cannot hurt. In any case, it is not likely to happen anytime soon. Pure "AI judging" will probably never be used.
Posted on: 9/9/2009 12:56 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9081628

RE: A Step Change in Judging - Improvement through technology
Both pilots and judges would have to learn to recognize the correct geometry I guess... surely a change for the better?
Posted on: 9/9/2009 10:15 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9081319

RE: A Step Change in Judging - Improvement through technology
No GPS I am afraid - but a simple transmitter in the plane, plus 3 receivers on the ground, can reconstruct the flight path very succesfully. Imagine 3 rf range meters working and logging constantly, the rest is simple triangulation that every PC can do. This is how passive air traffic radars work... not sure about the resolution that can be achieved though. Imagine if the 3D path can be plotted in some computer program, where you can watch it from all angles etc... kind of scary, isnt it.. [;)] If we can do this, the rest is a rather difficult task for programmers - to make a fair judging software which can compare the flight path to some ideal template, with certain transformations allowable (i.e. size) without downgrading, and then diviations from ideal would have to be evaluated (geometry, radiuses etc) and downgraded. In general, a long way to go ... but doable with current technology I am sure. I can imagine quite a strong "political" opposition to this though...
Posted on: 9/9/2009 10:13 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9081314

RE: What is the real story from Portugal?
Been there, seen the finals (and semis and a lot of the preliminaries too). I must say that twoturnspin is rather correct in his observations. The main problem, as I see it, is that the judges do not have the guts to downgrade the "big names" enough for obvious mistakes. Or maybe they do not see them. Either way, this is something that hurts this category immensely.
Posted on: 9/8/2009 5:54 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9079529

RE: the winner of F3A WC 2009..
Onda CPLR QQ etc [;)]
Posted on: 8/13/2009 4:31 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9012675

RE: Best way to fix a flying mistake
Another thing that works for me: if you over- or underrotate spin or snap roll, leave the correction until it is not so obvious what you do. Like into the next radius. Radiuses in general are very good for corrections: the plane changes orientation anyway, so the correction is easier to hide. Even if they notice what you do, they may be more benevolent because you do it the "expert way".
Posted on: 8/11/2009 11:25 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=9007499

RE: Downline Braking : ESC set up query
In both the Master and Spin (Hacker/Jeti) esc you can set the level of braking. Interestingly, too much brake can be less efficient than the "right" amount of brake (probably the prop blades turn too slow, with stalled airflow..). In my case, Hacker C50 XL13, the sweet spot is between 20 and 26%.
Posted on: 8/10/2009 6:17 AM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=9004153

RE: Glow vs. Electric. Let the discussion begin.
Guys please remember that this is pattern forum. I understand pattern to be a category where people compete flying precision maneuvres and are being judged in the process. Any mention of 40 or 60 class glow motor in fact does not belong here. Judging pros and cons of electric vs glow means comparing competitive pattern setups - 110 to 170 or 200 sized engines and 2 to 3 kW electric motors and their use in pattern training and competitons.
Posted on: 7/4/2009 4:44 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8906444

RE: Glow vs. Electric. Let the discussion begin.
For me, only electric. Having my plane set up in under 5 minutes, clean, consistent power (yes, with the modern cells it is very consistent). Packs getting cheaper and better every year, the airframe lasts for ever, servos do not wear down by vibrations, no complaints about the noise from anybody... I can understand why people like/use glow when they have a lot of experience and lot of money already invested in the equipment. For newbies though, electric makes much more sense, imho.
Posted on: 7/1/2009 6:05 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8898775

RE: Your biggest
To learn, some 4 years ago, that crosswind compensation during radiuses is mostly done with ailerons. Bernd Beschorner was so kind to come to one of our local competitions and to comment our flights and help us improve. Thanks again, Bernd!
Posted on: 6/23/2009 5:27 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8874831

RE: post some pictures of your pattern plane!!
This is my new Elexant soon to be ready to fly. I already have one and it is one fantastic flyer. Hacker 13XL, Hyperion 5000 G3 pack, Jeti Spin 99.
Posted on: 6/23/2009 5:22 PM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8874814

RE: hyperion digials for pattern planes
Hacker [;)]
Posted on: 11/11/2008 7:01 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8135712

RE: hyperion digials for pattern planes
I was using them in my Leviosa the whole 08 season - they are good! Centering, speed, strenght, all was very good. I had two of the 20 FMD on ailerons, the 20 UMD rudder (unlimited power!), two of 13 ACBs on elevator halves. Could not have been more satisfied. After 200 flights did not see any slop or degradation in performance.
Posted on: 11/10/2008 6:24 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8132453

RE: European Championship 2008 - Brescia Italy
Maybe not... the smoke trail gets blown aside during the stall turn, it is not the best indicator. And the wind tends to emphasize this.
Posted on: 11/4/2008 11:56 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=8114476

RE: ESC Timing ?
[quote]ORIGINAL: Ricardo M. I wanted to know how does the timing afect the performance of the motor? I am running a Hacker C50 13 XL competition with the Master 90-O-Acro competition ESC. The timing I use is 0°. What happened if I change the timing? What is the best timing for this motor? I am useing an APC 20x15, is there any relation between the timing and the propeller. Thank you. Ricardo. [/quote] I spoke to Rainer Hacker at the Euro Champs about the timing. He told me 2 degress, from 0 to 4 it is ok, in any case the motor is quite insensitive to the timing. I have even seen one guy leave 24 degrees (from previous outrunner) and use it with the Hacker C50 14XL. It was running seemingly quite ok, he did not do any measurements. Then realized. Do not try this at home, though. I use 2 degress, 3,1V cutoff, on the Jeti Spin 99. Hacker C50 14 XL, with 20x13 3-blade, Hyperion VX 5000s. Absolutely no issues, plenty of power. Flying most of the time to the soft cutoff.
Posted on: 9/21/2008 5:29 PM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=7976480

RE: An electric engine which fails to start properly
Glad to hear that it helped! I believe that the Advance line is not advanced enough [;)] to run all F3A outrunners properly.
Posted on: 9/4/2008 5:53 AM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=7918590

RE: 2008 US Nationals
[quote]ORIGINAL: J-P Does anybody can explain me why the Chip's comments about the Team and his experience with his e-engine disappear ? [/quote] Do you mean this http://www.rcuniverse.com/forum/m_7779329/tm.htm? A different thread...
Posted on: 7/31/2008 9:07 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=7792114

RE: US F3A TEAM THE BEST
Hello Chip, could you please give a link to or full specs on the Neu motor/esc combo - I am sure more people would be interested. Thanks, David
Posted on: 7/28/2008 6:55 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=7779714

RE: A123 Cells
/ but no info in English :-( I will make more pictures when I see Jaroslav Mach, next week I hope. David
Posted on: 8/19/2007 4:02 PM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=6258607

RE: A123 Cells
After some experimenting, mach has also gone to 11s2p and he reports that the power is very good. His new Leviosa is light enough to stay under 5 kg even with the 11s. Considering the shorter sequences beginning from P09, I believe that the A123s may become a viable solution...
Posted on: 8/19/2007 6:32 AM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=6257131

RE: Hacker C50XL or Cyclon F3A?
I do... well it is a solution proven many times over, thats it... loads of power, reliability, no issues with the esc... I like mine very much.
Posted on: 5/10/2007 5:19 PM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=5837464

RE: Contest Calling
While flying in the upper level, say during a spin entry, I sometimes like my caller to count down as I approach the centre .... to get an idea of where the perfect centre is, without me having to look down where the flag is.
Posted on: 3/15/2007 8:05 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=5564014

Gernot Bruckmann AM video
, like the "KE skating". I suspect that you might like it, David
Posted on: 3/3/2007 7:05 PM by Author "David Kyjovsky" in the forum "3D Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=5504835

RE: A123 Cells
I will step in to respond on Mach's behalf... He uses the clasic DeWalt pack cells, i.e. 2300 cells in 10s2p So far testing with 6 T HiRotex outrunner, but propped up (from 20x11 to 22x12) Data logging to be done soon So far quite a good impression (better than expected), good for 9 minute flights, Mach says "I would like to have some 5% of power more and it would be perfect". The available power seems to stay constant or even feels like going slightly up throughout the flight. Mach is experienced F3A competition pilot of many years, who used to fly all kinds of glow, gas, you name it, and he was the Czech electric F3A pioneer since 2003. He also manufactured the Rhapsody for Jason Shulman to fly at the WC in Poland. Experiments will follow with a new version of HiRotex, also it would be nice to borrow the Hacker XL 12 for few flights. Obviously the A123 is missing a bit in the Wh/kg parameter, but has 2 advantages: full charge in exactly 30 minutes, and maybe, just maybe, much longer cycle life compared to Lipo. We surely hope that the technology may be developed a bit further.
Posted on: 11/27/2006 6:09 AM by Author "David Kyjovsky" in the forum "Electric Pattern Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=5043823

RE: Composite-ARF Integral, kinda build thread
Jason, what led you (an electric pioneer) to go back to glow? Is it an authentic decision or a sponsorship thing?
Posted on: 11/23/2006 8:00 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=5029843

How about a 3m indoor Yak?
If you think that it is not possible, check out this video: [link=http://www.rcmania.cz/modules.php?name=Video&op=view&video_id=74]link here[/link] please right click the "download this video" link and save the file first on your harddisk (cca 20 MB). Worth seeing!
Posted on: 10/30/2006 6:48 AM by Author "David Kyjovsky" in the forum "3D Flying!"
http://www.rcuniverse.com/forum/fb.asp?m=4932387

RE: videos from the F3A Euro Champs now on RC Mania
[quote]ORIGINAL: ual767 Yes, thank you David for the videos. They are the best F3A videos I have seen. P.S. - I love my Super Zoom [/quote] Thank you! Now, the P-07 flight of Markus Wissinger (the reining German champion) was added. It is something else, but I also recommend the "Jumbo Shocky Indoor" video to yur attention [;)]
Posted on: 10/30/2006 6:44 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=4932379

RE: videos from the F3A Euro Champs now on RC Mania
[quote]ORIGINAL: papaone Hello David Thank you very much for video's P07 Carrier (we are in the same club) Claude [/quote] Sure.. I took the video because of your request... Stephane was flying very well, too bad he crashed twice... BTW, what is his explanation for the possible reason of the crashes?
Posted on: 10/26/2006 4:08 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=4916381

RE: videos from the F3A Euro Champs now on RC Mania
Video of P-07 by Stephane Carrier was added.
Posted on: 10/25/2006 10:41 AM by Author "David Kyjovsky" in the forum "Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=4912888