Roman Vojtěch | July 6, 2010 | F3B, Workshop |  |

Last year at F3B World’s my friend made picture of Japanese guy using small greaser tank to oil line. I found this idea as very clever and used it in my own way. I found following pros in this way to grease line:
- ecologic+economic
- clean (I hate all that sprayed siliconized stuff+staff, silicon everywhere)
- tiny
- cheap
- automatic (before going for parachute, just hang on greaser and that’s all, after comming back deploy greaser)
- AND IT’S WORKING!
I don’t think few pictures bellow needs some comments. Maybe only one, I use few drops of pure silicon, in commercial spray there is max. about 5% of silicon.
Roman Vojtěch | June 4, 2010 | F3B |  |
Today with our composite toys we have many tools how to set up proper deflections on all controllable surfaces (flaps, ailerons, elevator, rudder etc.). We play with speed polars at computers with sophisticated simulation software, we cope with secret setups from top pilots etc. We play with millimeters, on elevator perhaps with tenths of millimeters.
I was just curious what’s going on for example with trailing edge of standard F3B model at launch phase. For me it was big surprise to find out that if you setup e.g. 12mm deflection, just after model release from hand you can have there only 50% of expected setup.
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Roman Vojtěch | May 20, 2010 | F3B |  | Tanga

Today I fly my Tanga (Bretamodel.cz) in following configuration:
LOLO5; records altitude, voltage, flap servo (JR/Graupner Nr.6)
SPELO5; records speed (IAS-Prandtl probe), voltage, elevator servo (JR/Graupner Nr.3)
TENZO; records line tension
JETI Duplex R6 Receiver (2,4GHz)
All three devices are time synchronized, some data are seen on-line on my transmitter via JETI Duplex downlink. There isn’t too much space, is it? Very soon I will add GPS logger and 220Volt plug (grin).
Roman Vojtěch | April 28, 2010 | F3B |  | F3B Eurotour 2010
Nice competition accompanied by nice weather and controlled by experienced team lead by H.P.Goelz, M.Seyfang and U.Trautwein. Very pleasant airfield background, incl. water, showers, cakes etc.
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Roman Vojtěch | April 12, 2010 | F3B |  |
Vitaliy Ryumshin started Android F3X (F3B, F3J and F3K) stopwatches project. It’s perhaps partly port of well-known PalmOS stopwatches from Francesco Pantano. Just look at www.f3j.net and support this project at least by comments. You can download app also from Android Market.
Roman Vojtěch | January 25, 2010 | F3B, News |  |
At RC Groups there is interesting thread about F3J/F3B launch physics. Join us and help to decode this important part of F3J/F3B flight.
Roman Vojtěch | November 2, 2009 | F3B, News |  |
Roman Vojtěch | September 10, 2009 | F3B |  | F3B Eurotour 2009
F3B Sputendorf competition nearby Berlin is nearly two weeks gone. Anyhow I’d like to present you few pictures and even less than few thoughts.
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Roman Vojtěch | September 7, 2009 | F3B |  |
This is Crossfire wing after Michael Rae hit at F3B World Championship in Ivancice. Picture made by Jan Uhlik.

Roman Vojtěch | September 2, 2009 | F3B |  | WC F3B 2009
Nice picture by my friend Jan “Carbon” Uhlik from F3B World’s. Hopefully your winches are under rules (grin). Next week I will present here another very interesting and maybe a bit shocking picture from Ivancice, stay tuned.

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News- Translation
July 21, 2010 | 11:33I’m not sure how long it will have a sense to run both; Czech and English version of this website. Starting from now you can find on Czech Lomcovak in right column (just down) few flags which allows you to translate my website to your native language. Let me know if this translation is usefull or it’s nonsense.
- Spektrum Rx Recall
June 11, 2010 | 06:47HorizonHobby recalled Spektrum AR6250 DSM2 6-Channel Carbon Fuse Receivers for replacement or upgrade. Some my friends already fell down with this device.
- LOLO5 owner?
May 19, 2010 | 07:56LOLO5 owner? Ok, relax… Thanks to my good friends I had chance to measure randomly choosen LOLO5 logger in professional pressure chamber. Source of pressure is working with error 0,5Pa at 100 000Pa. Results? [...]
- Stopwatches for iPhone
May 10, 2010 | 13:50I already mentioned F3X stopwatches for Android. Here you can try F3X stopwatches for iPhone.
- VikingRace 2010
May 10, 2010 | 13:40VikingRace 2010 Live Ticker.
- Archive News »
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