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Archive for March, 2013
Posted by grmis | Mar 25, 2013 @ 06:25 PM | 15,859 Views
Two days ago I did the maiden flight of my autopilot system:

- Plane: Dynam Hawk Sky
- Flight controller: CRIUS AIO Pro (v1, first batch sold by HobbyKing)
- Software: ArduPlaneNG (r268). I found a lot of useful informations on the blog of Jean-Louis Naudin.

- For the PID parameters, I took those given here for the bixler. However, because the plane is somewhat overpowered, I reduced to 50% the max throttle in auto mode, and set to 35% the cruising throttle.
- GPS: uBlox LEA6H
- Receiver: FrSky D4R-II in CPPM (PPM SUM) mode (single wire going to the CRIUS board). One just has to add ' #define SERIAL_PPM ENABLE ' in APM_Config.h, and the PPM_SUM line goes to the throttle input of the Crius board.

I tested the stabilize, fly-by-wire-A (FBWA), return to launch (RTL) and Loiter modes with success . With some wind blowing at 10-20km/h the loiter trajectory was not quite a circle, but ok. Otherwise the plane was stable and ArduplaneNG nicely managed the throttle to maintain the speed and altitude.

I am now waiting for a minimOSD to install the FPV gear back in the plane.
Posted by grmis | Mar 21, 2013 @ 12:40 PM | 13,891 Views
For completeness, I am adding my last (but not least) bird to this blog. No much to say, everything is stock, but it is a great little machine !

Just notice on the picture that one can use a (switching) UBEC to power the Celectra charger with 6 volts. This way I can charge the mCPx lipo from a larger Lipo, no need to have a wall plug.
Posted by grmis | Mar 21, 2013 @ 12:33 PM | 14,323 Views
I go on posting some pictures of my birds.

This is an indoor/F3P plane, dubbed "Progress". It is made from 6mm EPP. You can find some build informations here ( Electronic setup:
- Motor: Turnigy 2204-14T 19g
- Propeller: GWS RD 8*4.3
- 6A Plush ESC.
- 6ch DSM2 OrangeRX, without case and servo wires soldered directly (no plugs) to save a little bit of weight.
- HXT500 servos for elevator & rudder (push-pull system)
- HXT900 servo for ailerons
- Rhino 360mAh 2S
Posted by grmis | Mar 19, 2013 @ 06:19 AM | 11,935 Views
It is an Easy-star clone with ailerons (= Dynam Hawk Sky = Smart Fly Junior ).
I use if for (short-range) FPV. It is a basic and light setup:
- Motor: ~ 2400kv (Hoffman Magnetics Super Sport) & 6x4 propeller.
- 900Mhz / 200mW Video TX from Hobby King
- Inverted Vee antenna in the plane and ground-plane on the receiver side (Thanks IBCrazy).
- To help tuning the antenna, I built this DIY SWR meter.
- 520TVL sony board camera, 2.5mm lens
- Remzibi OSD.
- Goggles: Fatshark rcv922 Base.

A not-so-recent video:
First FPV flights with an EZ* clone, Hobby King 900Mhz/200mW/420TVL system + Remzibi OSD (4 min 13 sec)

I am now (march 2013) installing an autopilot in it (CRIUS AIO v1 + ArduPlaneNG + minimOSD + uBlox GPS). More pictures coming soon !
Posted by grmis | Mar 19, 2013 @ 04:58 AM | 11,548 Views
Co-axial heli of the kids, with young pilot doing a pre-flight inspection
Posted by grmis | Mar 19, 2013 @ 04:56 AM | 8,322 Views
This one does not fly...

More info on this (french) forum:
Posted by grmis | Mar 19, 2013 @ 04:45 AM | 7,764 Views
My Easy Glider, filmed with a 808#16 keychain camera:

808 #16 keychain camera on an EasyGlider (2 min 23 sec)

It is equipped with an DIY altimeter/vario inspired from this one.
The pressure is measured by a BMP085 sensor (cheaper but less accurate than the MS5611) and, using an Arduino pro mini, sent to the ground via the telemetry link of an FrSky receiver D6FR.
I am not sure if this is really useful... but fun to build :-)
Posted by grmis | Mar 19, 2013 @ 04:42 AM | 7,575 Views
I go on introducing my (modest) fleet:
Mig-15 from Alpha-model (wing span: 750 mm).
I got it used for ~40$ PNF (it already had several crashes & repairs !) so I can learn how to fly an electric ducted fan-powered jet without much risk...
Posted by grmis | Mar 19, 2013 @ 04:34 AM | 7,009 Views
Let's try to put something in this blog !

I will start with my HK450 setup:
Gyro: Tarot ZYX, firmware 4.0
Servos: HK933 servos on the cyclic, Power HD 3688HB on the tail
Motor: Turnigy Typhoon 450H 2215H, 13T.
ESC: YEP 45a, with govervor tuned at 2850rpm (I know it is not much...). Installed below the frame.
7$-HK carbon blades.
Receiver: FrSky D6FR (installed inside the frame), monitoring (telemetry) the Lipo and BEC voltages.