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Posted by schumixmd | Jul 13, 2016 @ 02:12 PM | 945 Views
Beside of FPV, from time to time, I fly LOS, just to maintain my basic skills.
When it comes to Line of sight flights I prefer gliders.
When It comes to gliders - DLG is an old dream of mine.

To enter this discipline, is not cheap at all, if you want to start with a competition grade glider. Even a low end glider will cost a fortune.
I was lucky to get a second hand Blaster 3.5 from Vladimir's model. It was crashed but nicely repaired and not as pricey as new one.

My dream came true.

Here is my first try to launch a DLG, in not so smooth weather.
My camera girl was making fun of me - and I have spotted that at home, while watching the video

Blaster 3.5 Discus Launch Glider: Lift me up (4 min 0 sec)

Posted by schumixmd | Jul 09, 2016 @ 05:29 PM | 1,408 Views
REDCON CM651 is just another Spketrum compatible receiver. Banggood kindly sent me one to give my though about it, so I'd like to share it with you guys.

Firstly, the package should have included:
  • 1x REDCON CM651 receiver
  • 1x REDCON Satellite
  • 1x Bind plug

Well, I said "should" because the binding plug was missing, but I don't think that's a big deal, isn't it?

Now, before we go further, let's check the specs:
  • Band: 2.4G
  • Channel: 6CH
  • Material: Plastic
  • Modulation: DSM2/DSMX
  • Dimension: 21.6x30.1x12.3mm
  • Weight: 10g
  • Voltage: 3.5-9.6V
  • Receiving Antenna Length: 30mm
  • Compatible with all the Spektrum and JR 2.4G transmitter.(Not compatible with Spektrum EU version)
  • Compatible with DSM2/DSMX transmitter and expansion transmitter module.
  • Compatible with Devo10 ,DX6I , DX18,DX7,DX8,DX9 transmitter.

To be more precise the receiver measures 34.5mm x 22.75mm x 12.9mm and the satellite measures 26mm x 20.4mm x 6mm. The satellite extension cable is 18.5cm long.

Since this is a 6ch receiver with a satellite, I have classified it as an alternative for Spektrum's AR6210 receiver. Both have the same specs, except that the original is 3.75x times expensive.

I have put the receiver thru various tests and I think nobody will be surprised, but the CM651 mimics exactly the same functionalities as the original AR6210, including:
  • Full Range Receiver
  • Model Match
  • Telemetry capable - tested with TM1000
  • SmartSafe Failsafe - which by the way I don't like!
  • LED Hold Indicator
  • Brownout detection

The only feature I miss in this receiver is the cPPM which because very popular, and I do use in all my FPV planes/quadcopters.

My final conclusion is that this receiver deserves it's place on the market, and I will use it as long as I need, instead of an original receiver. At this price, even OrangeRX is not able to compete.

I know about the war Horizon is making against, what they call "counterfeit" products, but as long as they're original receivers are overpriced I'll keep to use the cheap ones!
Posted by schumixmd | Jul 01, 2016 @ 07:13 AM | 1,743 Views
I received a call this morning. I was so glad to hear the voice of the post-man, like he's the only I wanted to see today
Later he showed up to my office to bring a package. Of course I knew what I was expecting so I could not resist to open the package.

Received a set of FR2205 2400kv motors from AOKFLY which they sent out for test and review.

My first impression: That's definitely a very well packed and the best box I have ever seen for a motor.

AOKFLY does not want to look like just another cheap company releasing cheap motors. So I would Congratulate them for good start.

Posted by schumixmd | Jun 15, 2016 @ 09:04 AM | 1,368 Views
Hi everyone.

well, as you might know, the weather in Europe this summer is not so generous to us(even now is still raining), therefore I had to delay the maiden a few weeks, then I was not able to bring the team together due to the unavailable free time for all.
But I couldn't postpone it forever, and I decided to do it by my self - (therefore the video quality is suffering, sorry for that ).

I've only had two flights on that day, that's why I do believe it is too early to have the final conclusion, but I would like to already share some remarks:
  • the plane is flying slow - good for aerial video
  • single motor pusher version - no underpower problem. Twin version will be even more efficient.
  • there is still a lot of space inside for batteries and electronics.
  • the parts are aligned perfectly. If the plane is assembled correctly no trims are needed.
  • perfect for long range flights
  • good angle for FPV camera and camera behind the dome (runcam in my case).

The only cons I have identified so far, is that with all the weigh in the front, GoPro, RunCam, 2x3000mah 3s batteries, Video Tx, the AP and DragonLink Rx on the CG and additional saving the weight from the tailboom holder - the plane was in balance - or keen to have aft CG.

Most probably a gimbal in front or twin motor setup will be slightly different.

I invite you to watch the video.
You can turn your favorite music on if you don't like to listen to my annoying voice.

SkyEye by E-do Model: Successful maiden (17 min 29 sec)

I will definitely do some adjustments and will have some more flights, afterwards I will come with follow-up videos. So, please stay tuned...
Posted by schumixmd | May 09, 2016 @ 06:58 AM | 1,525 Views
Well, the tail was the first part that I have assembled after receiving the plane. As I said – there were no manual in the box, but it also has one interesting feature which makes it a little bit – different.

The plane has a feature called vertical landing. That means the horizontal stabilizer has the ability to deflect upwards. I am still not confident that this would work. From videos on the internet, I would say it is a fast controlled crash rather than landing .
Thanks to designers – they made it possible to lock it in place with two bolts.

After understanding where all the pieces have to be installed/glued the assembling is straight forward....

First of all, I have glued the fiberglass reinforcement on the horizontal stabilizer.

Then I have glued the corresponding fiberglass reinforcement on the fixed part of the tail. This part also acts like a stopper, so that the stabilizer does not move down – only up.

A carbon rod will be inserted thru the moving part (horizontal stabilizer) and the fixed part. It will make the axis/shaft for the stabilized to move on.

Also if one wants to disassemble the tail for easier transportation – the spar could be removed by pushing it out with a screwdriver, or anything round of that size.
...Continue Reading
Posted by schumixmd | May 07, 2016 @ 04:00 PM | 2,605 Views
The wing is the most interesting part of the Sky Eye, because of its profile.

E-do model came with a profile which I have not seen before on FPV airplanes. It looks very promising from the aerodynamic point of view.
The wing has a very nice camber line – and if you don’t know what this means – I would like to directly quote the Wikipedia:
Camber is usually designed into an aerofoil to increase the maximum lift coefficient. This minimizes the stalling speed of aircraft using the airfoil. Aircraft with wings based on cambered airfoils usually have lower stalling speed…

The camber works as you would have the flaps down – that’s why the stall speed is lower and the lift is increased. But it has also a down side – the cruise speed is also lower – therefore if the plane is intended for long range flying – it would take a little longer to travel the same distance compared to a plane with flat profile, e.g. Skywalker or X-Uav Talon. That’s why long range on this plane can be really boring

Personally I like to soar in the thermals more than doing long range stuff, so I am confident that this summer I would beat my record – climbing above 1.8km without motor. I can’t wait… but before that, I have to finish building the plane

On the wing, there is no much to do. First of all, as you probably noticed already, I have glued the end ribs on the both halves of the wing.
I’ve also glued in two reinforcing carbon spars, the...Continue Reading
Posted by schumixmd | May 07, 2016 @ 11:19 AM | 2,539 Views
Hello guys,

Few months ago Henry from E-do Model announced their new airplane which they called SkyEye.

The name suggests from the start that this is a plane intended for FPV, and is the very common on planes which are designed for this purpose.

I liked the fact that the announcement went together with close-up pictures and videos of the plane, not only the 3D model, that way we can see better what this plane is up to – and to be honest, it got my immediate attention because I saw few features that looked very interesting. I will talk later about each one.

So, I have contacted Henry to arrange for me a sample for review.
He agreed to provide me a prototype and here the journey begins…

As always, EMS refuses to ship in my country so I had to find a workaround. The plane was sent to my family in another EU country and from there it was sent to me by bus – 2000km.

The plane arrived without a dent or scratch. It was only covered with one layer of bubble wrap and there were a lot of free space in the box. That let me think that the EPO foam out of which the plane is made, is strong enough and does not deform easily. But packing should be improved by just a little bit.

Happy to see it, I have started to build it right away, well – almost right away, because I was busy with another project that I had to finish I was according only few minutes/day, for which I have to sincerely apologize to E-do model guys and especially to Henry.

The unboxing video I...Continue Reading
Posted by schumixmd | Mar 08, 2016 @ 04:51 AM | 1,720 Views
Just another video with the FMS Butterfly.
Actually this is the first successful maiden flight with some bonus footage at the end.

FMS Butterfly Review: Maiden flight (4 min 0 sec)

Posted by schumixmd | Mar 02, 2016 @ 02:10 PM | 2,060 Views
FMS Buterfly Review: Courtesy of (7 min 44 sec)

For more details please check the Review thread -
Posted by schumixmd | Sep 29, 2015 @ 01:35 PM | 2,799 Views
One more written review from my side.

I hope everyone will like it. Please comment and/or share.
If for some reason you didn't like it, please let me know, I'll be grateful and will try to improve in the future.

You can read it, right here -

X-Uav One EPO Black Deluxe PNP: Maiden flight (5 min 18 sec)

Video review will follow next weeks if the weather will not get worse.
Posted by schumixmd | Sep 06, 2015 @ 03:25 PM | 2,765 Views
Flying for fun is always fun Crash at the end.

ZRM250 Fun flying (2 min 32 sec)

Posted by schumixmd | Jul 20, 2015 @ 01:53 AM | 2,525 Views
My Skywalker Naja is back in service after a short pause. I needed the AP for testing X-UAV One, but now I got two more Autopilots.

This video is a response to FlyBoySee challenge: How much do you trust your autopilot?
Well, you can decide by yourself how big is my confidence.
This was the first flight after trimming the plane. No PID tuning - the PIDs are from Skywalker preset. P.S. I've used Launch mode even in the first flight, as you can see, the wind is quite blowing at about 6-7 m/s.

Skywalker Naja and MFD AP Launch mode (1 min 41 sec)

Posted by schumixmd | Jul 12, 2015 @ 04:53 PM | 3,101 Views
flying on rails .. literally.
Speed Rail (4 min 25 sec)

Posted by schumixmd | Apr 06, 2015 @ 04:10 PM | 7,003 Views
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X-UAV One was one of the most awaited planes at the start of this season.
It got a place in our hearts by two unique features, not seen on the market until now.
All FPV pilots around dream about a plane that will have an unobstructed view of the camera while they're not limited on the propeller size.
X-UAV came with a solution for that request - boom prop assembly - and on top of that they included an extra feature that made their plane unique - virtually indestructibly foam from which it is made, and in the nose they pre-installed a servo gimbal. I will talk later about all of them.

Usually I do video reviews starting with the "Unboxing part", but this time I didn't resist and opened the box right away, much more I started to build it in the first night.

What's in the Box:

Anyway, at least let me list what was in the box.
The ONE came in a shipping box only. The shipping weight is only 2.2kg. Still there were room in the box for few extra bubble wrap material, but they decided the foam is so indestructible that it does not need it.

In the box I have found:
  • Small manual with few pictures showing in general how to assemble the plane, and 4 pages of warnings about LiPo batteries and other unneeded stuff for anyone except a beginner.
  • A long glass fiber wing spar - while the box is only 110cm long the spar is 122cm. Actually this is the only picture of the box that I have, which shows how the spar was fit in the box.
  • Another shorter glass fiber wing spar.
  • The fuselage itself.
  • The carbon tail-boom with the boom prop assembly and two servo extensions for rudevators servos pre-installed.
  • The v-tail parts.
  • A piece of soft plastic pre-molded so that it can be glued underneath the plane, to protect the belly on the landing.
  • A bag with some hardware, push rods, clevis, horns, hinges, bolts, two pieces of glass fiber for the wing and bolts, two more servo extensions, three pieces of sticking tape and a zip tie. Virtually everything needed to assembly the plane - except electronics.

Posted by schumixmd | Mar 02, 2015 @ 03:00 AM | 4,387 Views
Foxtech HorzonHD v4 review Part 3: RX Connection (9 min 56 sec)

Side note to the video:
The problem described, I was able to reproduce only using DragonLink RX's I have.
I was not able to replicate the problem with Spektrum DX8 and OrangeRX 6ch.
Posted by schumixmd | Feb 14, 2015 @ 03:18 AM | 6,335 Views

Few times I've been asked how to calibrate the Current Sensor on MFD AP, and why I do it so.
First of all I would like to begin with calibration procedure:

1. Disconnect everything from AP
2. Connect camera and video tx to AP. Alternatively you can connect video output directly to monitor/goggle.
3. Connect RX to AP via PWM or PPM and power the RX from a BEC connected to a LiPo.
4. Connect current sensor to your AP via 4 pin cable.
5. Power the AP from any 3s lipo, can be the same used to power RX in point 3.
6. Now your AP should work and you must see the OSD on the screen.
7. Connect a LiPo to current sensor. Be sure there is nothing connected to CS except lipo and the sensor is connected to AP as per point 4.
8. In AP go to Sensor Settings
9. With a multimeter measure the voltage on the lipo connected to current sensor
and then calibrate the voltage in menu(SENSOR SETTINGS -> CAL. VOLT ), so that you see the same voltage on the screen
10. Your done! Disconnect everything and connect as you need, try and report back if it worked for you.

Now, why it is needed to follow this procedure - Actually it is for beginners that will ensure maximum accuracy of your calibration.
Shortly this procedure can be explained like this: before calibration you should ensure no current is flowing thru CS, that means nothing should be powered via CS.

The calibration procedure stores in AP the value that CS IC outputs when the current draw on CS is 0(zero). But if you will have something powered from CS (video tx for example), then that amount of current drawn will be considered as 0 and it will not be calculated later in flight, and the OSD will show smaller values for Instant current consumption and Cumulative milliamperes.