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Full test flight of a RC Coanda Effect flying saucer by Jean-Louis Naudin
http://www.jlnlabs.org : ne fonctionne plus.. >>>http://jlnlabs.online.fr
http://jlnlabs.online.fr/gfsuav/gfsuavn01a.htm
The GFS-UAV model N-01A
A Coanda effect flying saucer
created on March 10, 2006 - JLN Labs - September 15, 2006
Toutes les informations et schémas sont publiés gratuitement ( opensource ) et sont destinés à un usage personnel et non commercial
All informations and diagrams are published freely (opensource) and are intended for a private use and a non commercial use.
You will find below the full plan of the GFS-UAV model N-01A and a detailled tutorial to help you to replicate my GFS UAV..
Click here to see a 3D view video about the GFS-UAV N-01 design (1.6 Mb)
Below, the specifications and the performances of my GFS-UAV N01A (the smaller model).
The engine is a brushless motor AC 28/7-30 D brushless motor from MP JET.
| Number of cells | 6-9 or 2-3x LiPol |
| RPM per Volt | 1100 |
| Maximum recommend speed (min-1) | 12000 |
| Maximum speed (min-1) | 15000 |
| Maximum efficiency (%) | approx. 79 |
| Current of maximum efficiency (A) | to 15 |
| Short time currrent (A) | 20 |
| Internal resistance Ri ; (mW - miliohm) | 81 |
| Dimensions - diameter/length (mm) | 35,5/33 |
| Shaft diameter (mm) | 3 |
| Number of turns | 30 |
| Weight of drive unit (g) | 56 |
| Recommend propeller range | APC 7/3 - 9/6 (10/4,7) |
The brushless motor is connected to a speed controler JETI Advance 30-3P
The best propeller tested is an APC Electric 10 x 7 E from Landing Products.
The material required to build the GFS-UAV N-01A is a 3 mm thick styrofoam sheet XPS (Depron, Gediplac, Ectrupor) and some 1 mm diameter carbon rods.
( click here to see some technical infos about the Depron Foam ) Mainstage 3 2 2.
The first step is to print the 35 pages below in PDF and assemble them so as to build the plan at full scale.
Click here to download the full plan of the version 1.0 of the GFS-UAV model N-01A
Above all the GFS-UAV parts must be cut in the styrofoam with a brand new cutter and with a low angle of cut.
To glue the different parts, I recommend you to use UHU Por or special foam Cyanoacrylate (CA) glue.
Above, after a computer designed phase, below, the true model is now a reality (below).
The curved petals, the key of the Coanda effect, are carefully assembled and glued on the main structure.
Be carefull to avoid cracks on the curved surface, click here to see the method to roll the petals on the main structure.
The GFS-UAV N-01A hull is now finished and perfectly in line with the CAD design..
The four moving flaps are ready to be assembled on the hull with an adhesive tape as hinge.
The moving and fixed rudders for the yaw and the anti-torque control are prepared and installed.
Above: A detailled photo about the main electronic parts (receiver, gyro, Lipo battery, the pitch and bank servos)
Above : A detailled view about the command of the flap.
Above : A detailled view about the command of the moving rudders.
There are 4 servos in parallel controled by the anti-torque piezo gyro for the yaw control (see below)
The ready to flight weight of the GFS-UAV N-01A is 533 g with a video camera transmitter on board.
I recommend strongly to add a streamlined body 280 mm diameter and 60 mm height and placed at 45 mm above the hull. You will notice that the efficiency will be greatly improved and the flight more stable. The streamlined body is made with a 3 mm thick depron foam and fixed with 8 carbon rods (2 mm diam) on the hull.
Above, you will find the correct setup for the all flaps.
I also recommend you to use at least a 150 Watts brushless motor with your GFS-UAV N-01A.
The best engine tested for the GFS-UAV N01 is the outrunner brushless motor : AXI 2808/24 with
a propeller Graupner ECO CAM PROP 10/6' ( 25/15 cm ) ref : 2941.25.15
|
The Lipo battery used is a PowerHouse (selected cells) 3S1P at 11.1V 950mA (rated for 25C)
Lipo pack weight : 96 g
See also :
The Coanda Effect Test Bench (CETB), a very useful tool
Successful hovering at 3 meters above the ground
- The GFS-UAV in action with a video-camera
For more informations, please contact Jean-Louis Naudin : JNaudin509@aol.com
Join the GFS-UAVgroup-list : http://groups.yahoo.com/group/gfsuav/
http://jlnlabs.online.fr
kgfly, 28 Apr 2008
Quality/reliability
The BC6 is the oldest of the group and has an excellent track record for simplicity, performance, reliability and quality. It has many features. The rest are too new to know yet although I have not seen any bad comments about quality or performance issues for any of the newer chargers.
Input power:
BC6 and 0606iAD/MP860DS have integrated ac/dc power supplies which is very convenient and saves the cost of a separate DC power supply.
X6/610C/106B require an external DC power supply of at least 125W/100W/230W respectively.
Output power:
BC6 = 50W/5A, 0606iAD/MP860DS = 50W/6A, TP610C = 80W/10A, X6 = 100W/5A, iC106B = 180W/10A
If you are looking for higher power, the 100W/5A rating of the X6 is better for 5s/6s whereas the 80W/10A of the 610c is better for 4s and below but the 180W/10A of the iC106 eclipses them both. The following table reveals the relative utility of these different output power ratings.
LCD:
BC6, Maxpro, iC106B = very clear from all angles
0606i (assuming it is the same as 0610i) = poor contrast and hard to read from off-perpendicular
kgfly, 28 Apr 2008
Quality/reliability
The BC6 is the oldest of the group and has an excellent track record for simplicity, performance, reliability and quality. It has many features. The rest are too new to know yet although I have not seen any bad comments about quality or performance issues for any of the newer chargers.
Input power:
BC6 and 0606iAD/MP860DS have integrated ac/dc power supplies which is very convenient and saves the cost of a separate DC power supply.
X6/610C/106B require an external DC power supply of at least 125W/100W/230W respectively.
Output power:
BC6 = 50W/5A, 0606iAD/MP860DS = 50W/6A, TP610C = 80W/10A, X6 = 100W/5A, iC106B = 180W/10A
If you are looking for higher power, the 100W/5A rating of the X6 is better for 5s/6s whereas the 80W/10A of the 610c is better for 4s and below but the 180W/10A of the iC106 eclipses them both. The following table reveals the relative utility of these different output power ratings.
LCD:
BC6, Maxpro, iC106B = very clear from all angles
0606i (assuming it is the same as 0610i) = poor contrast and hard to read from off-perpendicular
Ease of learning/use
Of the ones I have tried, the BC6 and MaxproX6 are both very easy to learn and to use. The Hyperion is slightly harder to learn/remember but if it is your only charger you will get used to it quickly. I don't yet have hands-on experience with the TP610C or iC106B.
The BC6 lets you turn off the various beeps and tones which is a feature I really like and is missing from the Maxpro. It is present on the iC106B but not sure about beep/tone control on the others.
Feature summaries
FMA CellPro4S (~$75)
- Requires DC power
- LiXx only: LiPo/LiFe(aka A123)
- 2S to 4S integrated balance charger
- 50W/4A output (3s @ 4A, 4s @ 3A)
- Normal, Fast and Storage LiPo cycles
- No discharge feature
- optional PC interface (logging only)
Twin V2 0 6 Download
- optional balance plug adapters
Bantam eStation BC6 (~$150)
- ac/dc input
- Full multichemsitry LiXx/NiXx/Pb
- 2s-6s integrated balance charger
Xtwin V2 0 6 Exe
- 50W/5A output
- Balance current 300mA
- Normal, Fast, Balance and Storage LiXx cycles
- Discharge features (7W)
- 5 memories
- optional temperature probe
- optional PC interface (logging only)
- wide range of balance plug adapters
Hyperion 0606iAD (~$140)
Mega Power Poseidon-860DS (~$110)
- ac/dc input
- Full multichemsitry LiXx/NiXx/Pb
- 2s-6s integrated balance charger
- 50W/6A output
- Balance current 300mA
- Normal, Balance LiXx cycles (NO Storage feature)
- Discharge features (5W)
- NO memories
- NO PC interface
- NO temperature probe
- wide range of balance plug adapters
ThunderPower 610C (~$130)
- Requires DC power
- Full multichemsitry LiXx/NiXx/Pb
- Integrated 2S-6S balancer
- 80W/10A output
- Balance current ???mA
- Normal(with/without balancing) and Storage LiXx cycles
- Discharge features (7W)
- 25 memories
- ?? PC interface ??
- ?? temperature probe ??
- TP/FP and JST-XH balance port adapter
Maxpro X6 (~$140)
KongPower 100W6 (~$130)
- Requires DC power
- Full multichemsitry LiXx/NiXx/Pb
- 2s-6s integrated balance charger
- 100W/5A output
- Balance current 400mA
- Normal, Fast, Balance and Storage LiXx cycles
- Discharge features (12W)
- No memories
- included temperature probe
- included PC interface (logging and firmware upgrades)
- some balance plug adapters (JST-XH, TP/FP)
iCharger 106B (~$100)
- Requires DC power
- Full multichemsitry LiXx/NiXx/Pb
- 2s-6s integrated balance charger
- 180W/10A output
- Balance current 300mA
- Normal, Fast, Slow, Balance and Storage LiXx cycles
- Discharge features (20W)
- 10 memories
- optional temperature probe
- no PC interface
- some balance plug adapters
Conclusion
If you want the convenience of an integrated ac/dc power supply then the BC6 is the top offering. The extra features, simpler use model and better LCD (at a guess) more than make up for the small price difference from the 0606iAD. The emergence of the MP 860DS, which appears to be the same as the 0606iAD but at a bargain price makes it the value leader in this ac/dc group.
If you want more than 50W output but don't want to spend more than $150 then the iC106B is the clear value leader. On features and performance it competes against other high-power chargers like the BC6-10 and EOS0610i but on price it is down in this group. A new model from a new brand, it is a bit of an unknown quantity, but initial user feedback is positive.
Otherwise it is a toss up between the MaxproX6/KP100W6 and the TP610. Both offer good value in terms of features and power. The ability for the user to install firmware updates on the Maxpro is very appealing . In most cases in the US though, it is probably easier to get backup and support for the TP610C and it is bound to be popular.
http://www.helifreak.com/showthread.php?t=74722
