Dec 4, 2014

List of components needed (with weight, size and price)

There is a wide range for choosing the necessary plane components, there are a lot of specialized websites and lots of manufacturers and varieties.
Hobbyking.com has a huge database of all these components and more, so it’s the chosen one to take the information from. For cameras and extras, Nitroplanes.com is another useful website.

The plane will need:

  • Servos (2 x Aileron, 1 x Elevator, 1 x Rudder): 


14.4g, 25x19.6x8
2.51€


www.hobbyking.com/hobbyking/store/__3715__Hobby_King_S0361_3_6g_45kg_12sec_Micro_Servo.html


9 g, Size : 21x12x22 mm
2.1€
www.hobbyking.com/hobbyking/store/__662__HXT900_9g_1_6kg_12sec_Micro_Servo.html


17.4g, Size: 26x13x26
13.03€
www.hobbyking.com/hobbyking/store/__8760__Turnigy_380MAX_Micro_Servo_Metal_Gear_4_1kg_16sec_17_4g.html


51g, 44x40x20
5.15€
www.hobbyking.com/hobbyking/store/__16266__HK15288A_Analog_BB_MG_Servo_51g_9kg_0_20s.html



·         1 x Electronic speed controller (ESC)

32 g, Size: 54 x 26 x 11mm
www.hobbyking.com/hobbyking/store/__15205__Hobby_King_30A_ESC_3A_UBEC.html


25g, size: 50x26x12
10.1€
http://www.hobbyking.com/hobbyking/store/__11617__Turnigy_AE_30A_Brushless_ESC.html


25g, Size 45x24x11
10.26€
http://www.hobbyking.com/hobbyking/store/__2164__TURNIGY_Plush_30amp_Speed_Controller.html


33g, 55x28x13
17,15€
http://www.hobbyking.com/hobbyking/store/__2165__TURNIGY_Plush_40amp_Speed_Controller.html


35g, size: 60x28x10
15.52€
http://www.hobbyking.com/hobbyking/store/__39566__Corona_40A_Brushless_Speed_Controller_2_6s_3A_UBEC.html


54g, size 45.5x33x23
17.8€
http://www.hobbyking.com/hobbyking/store/__16364__Turnigy_dlux_40A_SBEC_Brushless_Speed_Controller_w_Data_Logging.html


38g, size: 59x27x12
24,65€
http://www.hobbyking.com/hobbyking/store/__8922__TURNIGY_K_Force_40A_Brushless_ESC.html


61g, size: 70x32x17mm
14.24€
http://www.hobbyking.com/hobbyking/store/__16892__Hobby_King_60A_ESC_4A_UBEC.html



·        Battery (choose one of the best, crucial component):

-        NiMh, Nickel Metal hybrid: less powerful, less expensive.
-        NiCad, Nickel Cadmium: less power, more battery life, heavier.
-        LiPo, Lithium Polymer: both light weight and long lasting, more expensive.

Things to know about batteries:

2000mAh is the capacity and the most important figure.
Fully charged: 4.2 V (in each cell). Discharged: 3.0 V (in each cell).
A battery with a discharge rating of 10C would mean you could theoretically & safely discharge it at a rate 10 times more than the capacity of the pack (15C pack = 15 times more or 1C discharges the battery in 1/1 hours or 1 hour and 2C discharges the battery in ½ hour). A 2000mAh cell discharged at 6 amps is being discharged at 3C (2000mA x 3).

If you have 2 2000mAh cells and you wire them in parallel then the result is the same as 1 4000mAh cell (it has the same C rating as the original 2000mAh cells did). Thus if the 2000mAh cells could discharge at a maximum of 5C, or 10 amps then the new 4000mAh cell can also discharge at 5C or (4000mA x 5) 20 amps. This method of battery pack building allows us to use LiPo batteries at higher currents than single cells could produce.
If you get a pack with a C discharge rating at least double of the maximum you intend to pull out of it; with proper care, there's no reason you shouldn't be able to get at least 400 charge and discharge cycles out of it with average degradation.

The XSXP method: for example a 3S4P pack of 2100mAh cells has a total of 12 cells inside. It will have the voltage of any other 3S pack since the number of cells in series determines the voltage. It will have the current handling of 4 times the maximum C rating of the 12 individual cells. So say our 3S4P pack had a maximum discharge of 6C. That means that it has a nominal voltage of 10.8 volts (3x3.6) and a maximum discharge rate of 50.4 amps (2100mAh x 6Cx4P).

Important to use a programmable ESC since the correct voltage cutoff is critical to the life of the batteries. Use the ESC's programming mode to set the LVC to 3.0 volts per cell with a hard cutoff, or 3.3 volts per cell with a soft cutoff. If the ESC has an automatic lithium mode. Use it, it will correctly sense the number of cells and set the auto cutoff appropriately.

Performance graphs from manufacturer. Looking at how low the voltage of the cell drops at various amperages will give you a metric to compare that battery to similar size/weight batteries.

(http://diydrones.com/profiles/blogs/complete-guide-on-lipo-batteries)
(http://www.rchelicopterfun.com/rc-lipo-batteries.html)



electronics.stackexchange.com/questions/64056/calculating-useable-amps


User “henkvdw” at fpvlab.com/forums/showthread.php?6348-3S-or-4S-lipo explains:

A 3S pack delivers nominally 11.1V. A 4S pack delivers nominally 14.8V.
The ESC controls how many volts the motor sees. For low RPM, the motor sees low Volts. This is where kV (Voltage constant) comes in:
kV = 900 RPM/Volt, like in your motor, means that motor will spin 900 RPM for every Volt supplied to it in the unloaded case (no prop). When loaded with a prop the RPM comes down. If the ESC supplies 1 Volt, the motor spin 900 RPM. If the ESC supplies 10V, the motor spins 9000 RPM etc. How many Volt the ESC supplies, is controlled by your throttle stick.
So with a 3S pack you probably get 11.1V at full throttle and maybe 6.5V at half throttle although this is not always very linear. With a 4S pack you will reach the 11.1V mark maybe at ~3/4 throttle. So essentially then up to the ~3/4 throttle mark, it is to the motor as though you are running a 3S pack.
The extra heat will come when you exceed the 11.1V. Now the motor will try spinning the same prop faster and draw more current at higher volts meaning more watts and heat.
At full throttle the motor will see the full 14.8V and even though the current drawn may be lower the input watts will be higher since p=vi (Input Watts = Voltage x Current).
So not to exceed the input watts drawn on a 3S say at 20Amps = 11.1x20=222W you should not exceed 222W/14.8V = 15A on 4S. With the same prop this would not be the case. You will have to prop down to get to that Amp draw of 15A on 4S. You may already be over propped for 3S if the motors get to hot.


161 g, Dimensions: 115x35x21mm
12.24€
www.hobbyking.com/hobbyking/store/__11908__Turnigy_nano_tech_1800mah_3S_25_50C_Lipo_Pack.html

188g, size: 105x33x24mm
8.48€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8934


204g, size: 104x27x35
13.59€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10279


270g, size: 133x44x21mm
25,59€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11949


351g, size: 145x50x21mm
21.24€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9957


408g, size: 144x51x27mm
24.1€
https://www.hobbyking.com/hobbyking/store/__8587__ZIPPY_Flightmax_5000mAh_3S1P_30C.html


536g, size: 148x49x33mm
26.39€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9177


482g, size: 149x49x30mm
33.43€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10286


569g, size: 162x46x40mm
35.87€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=21381


448g, size: 158x45x32mm
36.60€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=63428


908g, size: 167x49x55mm
64.49€
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11941



  • Motor, brushless outrunner type (best power-to-weight ratio, more torque, simpler):
Depends on the weight of the plane. It determines the propeller size

About using a blades pusher propeller or an electric ducted fan (EDF) let’s make a comparison of different parameters that set the overall performance.
As user “KenP“ detailed at www.rcgroups.com/forums/showthread.php?t=351759:


1) Flight times
Pusher will get better flight times for a given battery since you can run a more efficient propeller than you can in a EDF.

2) Speed
All depends on how much you want to spend but you can spend less on a pusher to get a given speed then you can with an EDF. Making an 80+ pusher is easy but to get an EDF to do those speeds you start looking at big bucks. Most pylon planes are props for a reason.

3) Maneuverability
I would say this is a wash, maneuverability all depends on the airframe. Unless that is you make vectored thrust then the EDF wins.

4) Pushers to get a given speed, flight times are a LOT less expensive, I would say on the order of half of a EDF. For example to make a GWS EDF fly good you need two brushless motors in the EDF units, but make the pods hold two brushed speed 300 motors with pusher props and you get good performance. Big difference in cost there.

5) Construction difficulty
With pusher setups you do not have to worry about the ducting being smooth having intakes that are big enough etc. You just need enough space behind the plane to swing the prop you want.

6) Number of blades
All depends on what you want the plane to do. Do you want speed or vertical thrust? I like to have a speed in the 70+ range with almost a 1:1 thrust I don't get unlimited vertical but in the size of planes I like they get small really quick, so unlimited vertical is not needed.




51 g, Dimension: 32mm x 26mm, 48mm (with shaft)
13.42€
www.hobbyking.com/hobbyking/store/__8502__Turnigy_2632_Brushless_Motor_1000kv.html


http://www.nitroplanes.com/02p-motor-371-as2820-kv920.html


http://www.hobbyking.com/hobbyking/store/__19621__NTM_Prop_Drive_Series_42_48_650KV_1295W.html


http://www.hobbyking.com/hobbyking/store/__14847__NTM_Prop_Drive_Series_35_36A_910Kv_350W.html


http://www.hobbyking.com/hobbyking/store/__55418__NTM_Prop_Drive_Series_35_36A_800Kv_722w.html



132g, Φ35×42mm
56.9€
http://www.rctigermotor.com/html/2013/Professional_0912/47.html

Combo motor + ESC
12.76€
http://www.hobbyking.com/hobbyking/store/__40269__HobbyKing_Donkey_ST3511_810kv_Brushless_Power_System_Combo.html

  • Propeller (must be foldable for unpowered flight)

15 cm. Size 203.2x152.4mm

2 €

www.nitroplanes.com/95a289-09-propeller.html

And too many more to put here.


  • Transmitter (two sticks operated by pilot)
24€
www.hobbyking.com/hobbyking/store/__16239__HobbyKing_HK6S_2_4Ghz_FHSS_6Ch_Tx_Rx_Mode_2_.html
2.4 GHz
6 channel

·        Receiver (mounted on the plane): depends on the transmitter. Connected to servos.
·        Telemetry system?





Mission specific devices:
  • FPV camera
Available video resolutions

http://static.dscuento.com/images/wp-content/uploads/2014/07/17/1405605444766/800px-common_video_resolutions_2svg.png


  • Camera option 1 (1080p 4G connection, unlimited range):


165g, 83.9x56.4x56 mm

400€

www.skydrone.aero/fpv/features-fpv

  • Camera option 2 (1080p (Full HD) WiFi):

640 g approx. Size 62x42x7mm

90 €

www.nitroplanes.com/70p-302-s2-wifi-sport-pro-cam-silver.html
Video resolution: Full HD recording, 1080P 30fps; 720P60fps
WiFi function (2.4 GHz or 5 GHz?)
120 degree
Support up to 32 GB Micro SD Card
90 min battery life

+ antenna + mission planner
http://diydrones.com/profiles/blogs/how-to-build-an-fpv-antenna-tracker-for-use-with-mission-planner


  • Camera option 3 (1080p (Full HD) with own 5.8GHz transmitter) :

Size 82*44*41

iLook+ (1080p): 150 €

iLook (720p): 100 €

http://www.walkera.com/en/showgoods.php?id=2611
130 degree
Support to 64 GB
1 km range

  • Camera option 4 (720p (HDTV) WiFi, small)
60€
www.nitroplanes.com/78p-301-wifi-ip-cam-black.html


  • Camera option 5 (1080p (FullHD), small):

57 €

37 g, size 64*38*16mm

www.nitroplanes.com/78p-405-1080p-mini-cam.html
140 degree
Support up to 32 GB


Camera option 6 (576p (PAL) with Pant/Tilt system, NTSC would be 640x480 px (480i)):
18 g, Size: 38*38mm
13.59€
www.hobbyking.com/hobbyking/store/__11977__1_3_inch_SONY_CCD_Video_Camera_PAL_.html

10 g + 10 g servos, Dimensions: 42x40mm
www.hobbyking.com/hobbyking/store/__12875__FPV_Fiberglass_Pan_Tilt_Camera_Mount_L_Size_.html

  • Camera option 7. Mobius Cam (Full HD):
39g, 35x61x18.3mm
http://www.hobbyking.com/hobbyking/store/__54706__Mobius_Wide_Angle_B_Lens_ActionCam_a_1080p_HD_Video_Camera_Set_With_Live_Video_Out.html


  • Camera option 8. HD Wing Camera (HD):
29.4g, 74x28x15mm
http://www.hobbyking.com/hobbyking/store/__17200__HD_Wing_Camera_1280x720p_30fps_5MP_CMOS.html

  • Camera option 9. HD Mini Cam with integrated WiFi:

http://www.hobbyking.com/hobbyking/store/__56990__Boscam_TR1_FPV_All_In_One_Camera_and_5_8_GHz_Transmitter_with_HD_Video_recorder.html






Innovative idea, use 2 cameras separated by the eyes distance, to broadcast one image to each eye in the goggles, so the pilot sees in 3D when flying between: 


Looking around the web there are some projects with the same idea, already implemented and with limited sales from 300 to 800 USD.

http://emrlabs.com/index.php?pageid=2


https://www.indiegogo.com/projects/transporter3d

+ SD Card, size for a 60 minute HD video at 30 fps. 16GB = 27€




  • Gyros system for stabilization:
Weight 4.1grams Length: 46mm Width: 22mm
www.nitroplanes.com/73p-3axisgyro-fixedwing-plane.html


  • Goggles for real FPV 
http://www.fatshark.com/


  • FPV screen system, option 1, transmitter + receiver + monitor:

200 €
www.nitroplanes.com/05p225-fpv-system-no-camera.html

  • FPV screen system, option 2, transmitter + monitor:
300€
www.mercadorc.es/Walkera-Devo-F7-FPV-7-Channel-Transmitter-58Ghz-FPV-kit-Edition-with-RX701



Complete description chart




Electronic components configuration:
http://2bfly.com/assets/bldcwiring1.png

Another wiring diagram:
http://www.reddit.com/r/radiocontrol/comments/u7tru/wondering_if_someone_could_look_over_some


And it can be placed these way:
(except for missing camera and changing motor placement)
http://www.ruberkon.com/media/catalog/product/cache/1/thumbnail/9df78eab33525d08d6e5fb8d27136e95/m/u/multiplex-solius-inner-look.jpg

Note that the battery is at the rear of the front set, just below the wings.





Nov 7, 2014

Similar planes comparison charts

Thanks to the specifications of similar planes, the range of dimensions can be narrowed, discarding the maximum and minimum values and adapting them to an increase in weight to up to 500 grams approximately, due to the added weight of the camera system.



Similar planes configuration chart
  (more models were checked but these are the most significant)


The sizes depend on the payload, which depends on the mission, the purpose that the plane is designed for.
As the plane’s purpose is diverse, let’s just say it must be able to climb to 100 meters at least, fly for 30 minutes to 1 hour non-stop with turns, ups and downs, and land smoothly. The takeoff can be made by hand-launch. The range depends strictly on the antenna that will be transmitting images from the camera.


Components from similar planes


Now for these components, an in-depth analysis with different models for each component is required, to know which ones are the most suitable ones for the mission.

Nov 5, 2014

Similar planes specs

The fact of not having a single idea about how radio controlled planes work, an inner study is required. Several features and specifications of these planes are going to be compared from existing planes that match the glider type.

Looking around the most famous websites for RC planes, there are a few that have the most similar configuration. It doesn’t matter if they are not designed for FPV because this is not such a difficult implementation to a glider compared to taking an FPV plane and transforming it into a powered glider.


This large powered glider (2.4 m):

Airfield Giant Glider
www.nitroplanes.com/95a289-giantglider-kit.html
Flight test VIDEO with explanations: youtu.be/WagA3Ywvo40

·        Wingspan: 2400 mm
·        Length: 1518 mm
·        Flying weight: 2250 – 2300 g
·        Propeller version:
o   Motor:  Out runner brushless AT3010-920KV
o   ESC: 40A Brushless ESC
o   Servo: 17g*6
o   Propeller: 8*6inch
·        Ducted fan version (much more power):
o   Motor:  Out runner brushless D2830B-3000KV;
o   ESC: 40A Brushless ESC
o   Servo: 17g*6
o   Ducted Fan: 65mm



Another one but smaller (1.4 m):

Airfield Wingsurfer X2
www.nitroplanes.com/36a11-wingsurfer-x2-aagreen-rtf-24g.html

Material: EPO
Wingspan: 1400 mm
Length: 915 mm
Wing area: 26 dm2
Wing load: 25 g/dm2
Flying weight: 650 g
Thrust force: 600 g
Drive system: 2627 KV1950 Outrunner Brushless Motor
LiPo battery: 3S 11.1V 1300mAh
ESC: 20ABrushless speed controller
Servo: 4*9g servos
Propeller: 5*5 (3-Blade)
Control system: 4CH 2.4GHz Multifunctional Transmitter



An intermediate wingspan plane (2 m):

Aerosky Robosurfer
http://www.nitroplanes.com/05a81-robosurfer-rtf-24g.html
Material: Durable EPO
Wing span: 2000 mm
Length: 1350 mm
Weight: 1350 g
Height: 285 mm
Total surface area: approx. 46.3 dm2
Prop Size: 8*7  2 Blade
Transmitter: 6CH
Battery:11.1v 2200mAh(20C)  (Li-polymer battery Maximum 11.1v(3s) 8000mAh battery)
Servo:6*17g,1.8kg/cm,0.18s/60
Motor:3536-KV1200 Powerful Out runner Brushless Motor
ESC: 30A Brushless ESC



Same wingspan (2 m) but with an EDF (electric ducted fan):

Wingspan: 2000 mm
Length: 1000 mm
Aerofoil: RG-15
Weight: 965 g
R/C System: EFLY-4B 2.4GHz
Motor: AE2810 out runner brushless, KV4100, improved 64 ducted fan
ESC: 40A brushless
Battery: 11.1V1800mAh/3s Li-Po
Servo: 9g×4



The largest (2.5 m) but with front motor:

Art-Tech Diamond 2500
http://www.nitroplanes.com/at-22093-diamond2500-rtf-24g.html

Wing span: 2500 mm
Length: 1500 mm
Wing Area: 55 dm2
Wing loading: 35g/dm2
Weight: 1900 g
Thrust rate: 0.85
Time for staying in the sky: > 30mins
Motor: Out runner brushless motor C3720
Battery: Li-Po battery 11.1V,2200 mAh 20c
ESC: 40A
Receiver: 6CH 2.4Ghz
Transmitter: 4 CH 2.4Ghz
Material: All in EPO but for the spinner cone (ABS+Al and folding propeller)



An example of a wide wingspan (2.45 m) with elevator in wing:

Air Wing Pioneer
www.nitroplanes.com/36a01-2450-pioneer-white-arf.html

Material: EPO
Wingspan: 2450 mm
Length: 800 mm
Motor: 3536-KV1000 Brushless Outrunner Motor 
ESC: 40A
Servo: 5x 9g servos
Propeller: 2-bladed Folding Prop
Battery: 11.1V, 3S 2600mAh 25C Li-polymer and Lipo Charger
Control system: 4 CH 2.4GHz Transmitter and Receiver

Long flight (1 h) glider (2 m):

Art-Tech Minimoa
www.hobbyking.com/hobbyking/store/__12885__Minimoa_Motor_Glider_EPO_2000mm_PNF_.html

DST-1200 Outrunner Brushless Motor
Long flight time clocked at 1 hour
Light weight EPO Foam Body
Battery 11.1v 3s 1300mAh
Length: 980 mm
Wingspan: 2000 mm
Weight 720 g
Servos 9g*4
ESC 20A
Wing has twin reinforcing spars and 1 cross member spar.




A Reaper-like plane (2.5 m):

Reaper drone
www.nitroplanes.com/projet-drone-2500mm-kit.html

Wingspan: 2500 mm
Weight: 2500 ~ 2700 g
Length: 1080 mm
Wing Area: 32.5 dm2
Wing Loading: 76 ~ 83g/dm2
Airfoil: Eppler 374 Modify
Motor Diameter: 38 ~ 42 mm
ESC: 40 ~ 50A
Propeller: 2 Blade 11x6 ~ 12x8 3 Blade 9x6 ~11x6
Battery: LiPo 3S/3500mAh ~ 4S/4000mAh
Reinforced carbon fiber wing structure



Another front propeller (2 m):

Phase 3 Phoenix II
www.hobbypeople.net/index.php/rc-planes/airplanes/rc-gliders/phase-3-phoenix-ii-epp-glider-kit-w-bl-motor-and-prop.html

Wing Span: 2.02 mm
Length: 1.21 mm
Flying Weight: 950 g approx.

18A BL ESC
11.1 V  1500-2200 battery
9g Servos (4)
EPP


A very strong plane (2 m):

Phoenix 2000
www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17227

Wingspan: 2 m
Length: 1160 mm
Flying weight: 980 g
Servos: 4 x 9g
Motor: Brushless 2815/1050Kv with a 3mm shaft
ESC: 30A
4 x 9g Servos
Battery: LiPoly 1300~1800mAh 3S
Main wing requires 1 servo per aileron, possibility of adding flaps, the two wing halves have a carbon fiber rod, wings and tail are made from tough EPO foam, the fuselage is made from a really strong blow molded nylon skin (more expensive).


The most expensive and heavier due to design and performance (2.16 m):

Multiplex Solius
www.hobbypeople.net/index.php/rc-planes/airplanes/rc-gliders/multiplex-solius-glider-rr-w-power-pack.html

3516-0850 Brushless Motor
40 Amp ESC

4 nano-servos and 12 x 6 Folding Propeller
Weight: 1450 g
Length: 1100 mm
Wingspan: 2159 mm
Wing Area: 40.7 cm2
Wing Loading: 35.6 g/dm2
One 3S 2200mAh LiPo battery + charger
Innovative tubular spar technology makes the wing impervious to stress


A fast sailplane (2 m):

SMM Raptor 2000
www.hobbypeople.net/index.php/rc-planes/airplanes/rc-gliders/smm-raptor-2000-powered-sailplane-with-electronics-package.html

Fiberglass fuselage, wing features molded leading edge and built-up trailing edge
9g micro servos x 6
1000kv brushless motor w/folding propeller
40 Amp Brushless ESC
3S 11.1V 2200mAh LiPo Battery
Wingspan: 2000 mm
Length: 1060 mm
Wing Type: S-4083
Wing Area: 32 dm2
Wing Loading: 25 to 35 g/dm2
Flying Weight: 800 g
5-Channel (extra flaps)