Archive for December, 2009

Video from T-Rex 250

This video was uploaded by man who knows electronics very well. His modified video transmission system gives clear view from long distance, while flying very low. Anyone who tried that will agree what it’s not so easy to achieve. I’m not a big fan of helicopters, but this video show that they can be fun too :)
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YouTube Direkt

New ducted fan quadcopter was introduced by Cyber Technology

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Last month, an Australian company, Cyber Technology (WA) Pty Ltd, used a drone with ducted fans in an actual operation. The Cyber Quad can carry a high-definition video camera or sensors to detect specific gases, like industrial pollutants or chemical warfare agents. The brushless electric motor is quiet and does not produce sparks – important when investigating a damaged oil platform. Top speed is around 40 mph with a mission time of 35 minutes. But this can be extended to some hours, because the drone is able to “perch” on various landing points, and look around from there.

You could see the perching craft as simply another type of unmanned aerial aircraft, or UAV. But another approach is to think of perching drones as unattended ground sensors capable of relocating themselves. A large number could be air-dropped over an area of operations (for example, ahead of a convoy) to find suitable perches. Their views could then be fed into a suitable video-sharing system so they are available to local commanders. And afterwards they can fly back to base or rendezvous with a drone “mothership.”

“Staring” in this context need not mean visual sensing. Perching UAVs would be an effective way of covering the battlefield with sensors for acoustic gunshot detection, which can locate the source of a shot from the sound. With several widely-spaced sensors, such a system could pinpoint shooters over a wide area.

Post prepared by: wired.com

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Our neighbours from Poland FPV club activities

Some video footage from www.rc-cam.pl meeting. They do have nice FPV setups and ground stations.

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vimeo Direkt

UAV Predator was hacked at Iraq


Military operation broadcast was leaked into enemy hands
2009 12 17 BBCCNN has reported USA UAV Predator was hacked by Iraq insurgents. USA army has found laptop which contained video broadcast from Predator UAV. These planes which costs millions dollars transmits video signal and it was captured with “SkyGrabber” program, which costs 26$. These type of broadcasts is used in UAVs Hunter, Shadow and Raven.

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Flight review: new equipment

First of all I will suggesst to see new video which I’ve took just before winter time:

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FPV soaring

Soaring is about catching thermals (rising warm air streams). Hotter air rises and carries the model up. This way it’s possible to reach new heights and better speed without using battery resources. There are some signs where you can find such zones. One of them – could is tend to form up above the thermal. Also it’s possible to use rising air which is reflected from the obstacle like forest or hill. If readers could comment more about soaring, that would be great. I don’t know about these things much, so let’s go to the equipment. Variometer is a metering device which helps to indicate if plane is rising or diving down. Measuring the pressure, coordinates, acceleration enables to calculate vertical speed. Usually it’s used sound signal – low frequency sound means you are goind down, high frequency – you are rising up. If plane catches high tone, it starts go in circles, to search epicenter of the thermal.

This video show FPV qpuipment and variometer installed in the plane. Short comments in the subtitles and nice video:

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Ion Tiger Fuel Cell UAV stayed in the air for 23h

ScienceDaily (Oct. 15, 2009) — The Naval Research Laboratory’s (NRL’s) Ion Tiger, a hydrogen-powered fuel cell unmanned air vehicle (UAV), has flown 23 hours and 17 minutes, setting an unofficial flight endurance record for a fuel-cell powered flight.

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