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Archive for January, 2018
Posted by blitzen | Jan 26, 2018 @ 08:44 PM | 3,825 Views
I recently installed my own pieces and parts into an LDARC Tiny 7 Frame Kit. Until I flew the quad around room, the experience was unremarkable. But after a few tests there was something familiar about it. I couldn’t tell what it was. The rotors seem to make a unique sound that almost triggers a memory. Where have I heard that noise before? After a few more battery charges I start to get the feeling like I’ve flown this quadcopter at sometime before. Even the way this quad handled in the air gave me a feeling of deja vu. Later on in the evening I went back to it and plugged in a battery. It was dark and the quad came to life with a phosphorescent glow. The lights filled in another part of my memory and then it all came back to me. That noise comes from the Cheerson CX-31 “Alien Head” flying saucer! I went to my collection to check it out.
Bingo! The CX-31 and Tiny 7 use the same 40mm 3 bladed props with similar 0720 motors mounted in a ducted propeller frame..
Both are 73mm OC measured diagonally motor to motor. The suggested power supplies are 450 to 500 mAh.1S LiPo batteries.
The old Cheerson “Alien Head” was designed for show. Surrounded in a ring of lights it is a great night flyer. It has been unused for a couple of years but everything still works. The newer Tiny 7 is obviously designed for FPV racing but it has some of the same inherent flight characteristics as the CX-31. And, it sounds the same.
Posted by blitzen | Jan 15, 2018 @ 02:09 AM | 2,760 Views
Eachine BeeCore F3 Flight Controller with On Screen Display
& 2.4G FrSky compatible 8 Ch. SBUS Receiver
Kingkong Tiny 6 Frame Kit*
31mm 4 Blade Propellers
Crazepony 19000KV Brushed Core-less (0615) Motors
700 TVL CMOS FPV Camera
25mW 5.8G 48 Ch. VTX
3db Dipole Antenna
Micro JST 1.25 Battery Connector w/ silicone wires**

Easy receiver binding and initial flight controller setup. Pre-configured with some basic settings.
On Screen Display including RSSI and VBAT monitoring
Reliable gyro and accelerometer
Perfectly balanced CG
Weighs only 20.5g.
Protected camera and indestructible antenna!
Better chance of finding clear reception with a 48 Channel VTX.
Designed with 10A FETs for larger battery and motors (and a slightly bigger frame).
Minor configurator, firmware and flight control /receiver bugs.
High speed motors need PWM adjustment to get rid of noise.
VTX/Cam has a tendency to over heat if air isn't moving through the canopy.***
Quad sits low on the ground. Needs a Micro USB 2.0 Data Sync Cable with a right angle connector.

* The BeeCore board fits on this Inductrix style frame correctly. Mounting the board on an E010 style frame, the battery holder is in the way of the USB connector.
** Tattu 220 mAh 45C LiPo batteries w/ micro JST 1.25 connector. (Weighs only 5.5 grams.)
*** VTX power leads tacked to battery pads. Avoids power from USB when sitting on the desk.
Posted by blitzen | Jan 03, 2018 @ 11:35 AM | 2,540 Views
What you see here is my New Year resolution. How long will it last?

The subject is FPV Micro Multi Rotors. The quadcopter size is usually less than 130mm (measured diagonally from motor to motor). Inspired by a popular model, I enjoy building my own version of it from off the shelf parts. DIY isn't a cost saving strategy. Although there is knowledge and personal satisfaction to account for.

Old man Winter is blowing his icy breath. Spring is still months away. This tiny FPV racer is my latest. Because of the holidays, I had to put off the processes of configuration and tuning until now. More about the little "Stinger" later on.