Archive for November, 2009

Amazing world’s UAV and much more

Amazing unmanned air, ground and water tactical, transport vehicles:

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FPV is banned in UK and Switzerland

UK this regulation is in order for a long time, but from 2009 Dec 1st, these rules applies in Sitzerland too. Vehicle must be under 30 kg and must not leave area of sight during the flight. Further flights can be done with special permission from authorities. We could say that it’s not a ban, but regulation. Still it looks like that government has nothing to do, and starts fight with the least bad thing in the country. Source.

My home town sport arena under construction

This video is submitted by Kestas from fotoskrydis.lt . This is Kaunas sport arena under construction. Most expensive development this year on my town. 100 million euros “investment”.

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Octocopter – what the hell is that?

I’ve found few interesting links to 8 propeller’s helicopter version. I guess it is doubled quadcopter, because idea of the control is the same. Video gives us a hint about increased stability. In the first video you can see how it looks like from the outside, in the seconds, there is some HD footage from the inside.

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Search and Rescue UAV iSOAR

In 2007 a team of 8 students from the University of Adelaide School of Mechanical Engineering designed and manufactured a UAV named iSOAR. The iSOAR aircraft was specifically designed for civilian applications such as bushfire monitoring, shark spotting, and traffic surveillance.

During the 2009 University year a group of four students further developed this concept. Using the experience obtained from the 2007 project, the team improved on the design of the iSOAR aircraft through enhanced aircraft aerodynamics, improvement of payload deployment and level of autonomy, and through the successful implementation of image processing systems. A new wing was designed for the aircraft, and flaps were incorporated in order to improve take-off and landing performance.

Information source Todd Sandercock.

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Added event’s calendar

To whom it may concern: we’ve added calendar for upcomming events. If you can and want to join FPV flight – you are welcome.

Stratosferic probe launched by hobbyists

Ernestas Kalabuckas from Joniškis has launched hydrogen balloon with attached probe to 32 km height. It is the first such experiment done in Lithuania by hobbyists. Probe had integrated digital camera connected to microcontroller, GPS receiver and transmitter. Launch team has tracked the balloon up to the border of the Lithuania. Unfortunately probe has dropped somewhere in our friendly neighbour Belarus. Still there is no easy way to get there in or out. So author can’t reclaim any photos from the outer space. He promised new launch with advanced equipment.

Vandenilio baliono pildymas

More about project: on GLORY.

Electric motors – Turborix 162W brushless outrunner


Our affiliate partners fro China R2HOBBIES sent us Turborix 162W motor. This RC shop has modest prices and good shipping offers. Packages are shipped by airmail, so it’s cheap and fast. (4-6$ to ship this motor). So I suggest to buy at this shop – it helps us! ;)

Old Hextronix was too weak to drag all the required equipment. This motor has twice weight, so it’s torque is better. Specifications:
rpm/v (kv) : 1070
Suggested Battery : 2-3 Cells Lithium Polymer Battery
Load Current (A) : < 15A
Recommended ESC : Turborix Advance 20A ESC
Suggested Propellers : 8 X 3.8″ – 11 X 4.7″
Weight : 60g (±5g)

In the photos you see the motor and included connectors with colored termoplastic. Quite nice setup setup for 8$ :) .

PB075691


Here you see photos of preparation for second FPV flight with 500mW transmitter. Flight itself was horrible, it was windy, elevator broke up and plane was grounded. Once again, it requires rebuild almost for the scratch.
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My first el cheapo FPV setup

MODIFICATION TO THE RECEIVER SHOULD BE DONE BY PROFESSIONALS. DON”T TRY THIS AT HOME OR DO IT ON YOUR OWN RISK. I DON”T TAKE RESPONSIBILITY IF YOU FRY YOUR ELECTRONICS, BURN DOWN YOUR HOUSE OR HARM SOMEONE, INCLUDING YOU. IT”S UNLIKELY BUT PLAUSIBLE. SHORTED ELECTRIC CIRCUITS MAY LEAD UP TO HEATING OR EVEN BURNING. REVERSE POLARITY ON CAPACITORS MAY BLOW THEM (ACTUALLY HAPPENED IN SIMILAR CIRCUIT). CONSIDER THIS PART AS A DISCLAIMER.


COPYRIGHT PART. THIS MODIFICATION IS DONE BY ME. YOU CAN NOT USE TEXTUAL OR PICTURE INFORMATION WITHOUT ASKING ME A PERMISSION AND/OR GIVING A LINK TO FPV.LT AS INFORMATION SOURCE.

When flying for the first time in FPV mode I was afraid that I’ll crash my equipment and loose some investments. Exactly that happened actually. So I didn’t want to buy any fancy expensive equipment. Something cheap, but upgradable. That’s why I’ve choose cheap camera with integrated 2.4 GHz 10mW transmitter standart 2.4 GHz receiver, USB video adapter and more powerful 2.4 GHz 500mW transmitter. I was sure that 10mW was not enough, but it was interesting to try also how 10mW works. It has much pros too (we’ll talk about it latter).

I had to mod 2 things: first of all receiver. It works from the wall plug (230V) by default. I’m pretty sure there is no such interface at the field where I’m flying. So I had to change it that it would work from my laptop USB port. I’ve seen some equipment on the eBay, which were actually USB receivers without external power supply. There is no secret that most of the are tend to be build on the same module, or atleast similar technology. So I’ve dissasmbled the receiver and slightly modified:

receiver and usb adapter

Receiver comes with 8V DC wall adapter which supplies the unit. Unfortunaly USB port provides only 5V. So we need to dig a little bit deeper. Let’s open the case and see what’s there.

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First true FPV

Finnaly I’ve setup my el cheapo FPV setup, with 2.4 GHz 10mW 380TVL camera, receiver and EasyCap USB video capture device. Laptop 1700 MHz celeron was capable recording video at 320×240 resolution. Quality awful. I hope to have better next time.

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Not sure why the plane turned nose down 2 times in a row. It ended with spectacular crash. Maybe some issues with control, mayby something else. Anyway, the results speaks for their selves: damaged HXT 3000kV motor, Graupner propeller separated into more than 3 parts. Nothing serious though. Plane’s body seen such things, kinda repairable.