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Nov 22, 2011, 09:45 PM
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idletime's Avatar
Originally Posted by subsonic
Why couldn't you plot it with Thrust vs Power? That way the 3S vs 4S data could be comparable.

come to think of it, I always wonder why, for FPV, to people even look at amps. I always set up my OSD to display power (Watts). That way, I know what the motor(s) is(are) putting out, regardless of battery condition. Current readings vary by too much depending on the state of charge to be useful for specifying flight performance for me.

Great question.....I just plotted what was provided
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Nov 28, 2011, 05:20 AM
Registered User
Originally Posted by idletime
why couldn't you plot it with thrust vs power? That way the 3s vs 4s data could be comparable.
Dec 03, 2011, 05:12 PM
Flying low is expensive.
pdiddyg40's Avatar
* Motor: BPHobbies 2814-6 1410Kv 103 gram
* Prop size: 9x6 APC
* ESC: RCTimer 60 Amp
* Separate BEC: Turnigy 8-15A
* Servos used: Hitec HS-81
* Flight battery: 2 x 2200mah 3cell Flightmax
* Video battery: Turnigy 3S 1000mAh
* Flight cam: 600TVL Sony Super HAD CCD D-WDR Color Board Camera
* VTX: FOX 700 (~500mw)
* VTX antena: DYI Cloverleaf
* RC RX: Corona --RP8D1 8ch synthesized
* RX antenna: DIY Cloverleaf
* Average flight times: ~30 min on 4400mah with a voltage around 11.0
* Ground station battery: 2cell 800mah on Trimersions, 1000mah 3 cell on VRx
* Flight recording: Apitek MVPR
* Flight control viewing: Modified Trimersion, powered by 800mah 2 cell
* Flight backup viewing: Apitek Viewing screen

Thanks for the format, ecampos!
Last edited by pdiddyg40; Dec 04, 2011 at 07:11 AM.
Dec 04, 2011, 02:41 AM
Registered User
Sounds good. Can you give a link to that motor? What kind of amps are you getting at WOT?
Last edited by jon davies; Dec 04, 2011 at 04:14 AM.
Dec 04, 2011, 07:11 AM
Flying low is expensive.
pdiddyg40's Avatar
Originally Posted by jon davies
Sounds good. Can you give a link to that motor? What kind of amps are you getting at WOT?
You know what? I think I goofed! I actually go this motor

I don't have any tested specs for it yet, as I'll have to get some XT-60s on my wattmeter. But it works really well. It won't take my Skywalked straight up at WOT but I can climb pretty aggressively at 45-50 degrees. But do you know what? Even if my climb was restricted to 30 degrees, I wouldn't mind. This is just my liotering FPV plane.
Dec 04, 2011, 08:33 AM
Registered User
Dec 04, 2011, 09:20 AM
jsxx's Avatar

Update !

Weight: ~ 2kg
Motor: KEDA 3536 1450kv
Prop size: APC 9x6
ESC: 60-80amp
Separate BEC: Turnigy 3-5A BEC
Servos used: HXT900
Single flight & video battery: Zippy 8000mah 30c 3S -perfect fit in SW
Cruise minimal consumption: 7A
Max speed: ~90km/h
Max flight times: 40 min flight and 4600mah used
VTX: Lawmate 1.2ghz 1w
VTX antena: Stock
VRX: Lawmate RX
VRX Stock/8dbi patch
Dec 11, 2011, 01:13 AM
Promoting Model Aviation...
Murocflyer's Avatar
Awesome! Best thread on RCG. Thanks for sharing your info.

Dec 14, 2011, 08:59 AM
O <- this a ground loop
Originally Posted by thekubiaks
As requested, I have a few more tests for possible Skywalker motor/prop combinations. These tests are with a Turnigy 3542/1000kv 6 pole.

Hobbywing Pentium 40A ESC, 4S 20C Lipo

9x5 Master Airscrew

4.9A = 405g thrust
9.8A = 700g thrust
15.2A = 980g thrust
23.0A = 1300g thrust
25.6A = 1420g thrust
25.9A MAX = 1425g thrust
I just ran a test with the exact same setup and although I can only measure up to 1000gm my results were spot on with yours.

Basically keep those test results coming!

You mention the Parkzone 9.5x7.5 - sounds like the best matched prop for that motor on 4S but I reckon the yet to be tested Master Airscrew 9x6 might be the safer bet considering the proximity of the tail boom.

I'm getting some of these 9x6E to test as well.

I forgot to get some MA 9x6 - duh...

Just found this 9x7.5E - could turn out to be 'the prop' for that motor.

Dec 14, 2011, 11:27 AM
Registered User
Only thing to add at this time, I started doing motor research with Motocalc 8. The program pretty much convinced me that the Scorpion line of motors (and Hyperion) were some of the most efficient on the market. I went with a Scorpion SII-3020-780. I am running my Skywalker in the exact same configuration as I did when I ran the Turnigy 3542/1000 6 pole.

Motocalc8 said that I should be cruising at 30mph on 5.4amps using the Scoprion SII-3020-780 and a 9x7 three blade master airscrew pusher.

My actual results are closer to 7.2Amps. Although the Scorpion is a very well built motor, it costs three times as much as the Turnigy. You have to decide if the 1 less amp is worth a $100 motor.
Dec 14, 2011, 06:15 PM
Flying low is expensive.
pdiddyg40's Avatar
All of that may be true, but I'd also trust a Scorpion motor much more than I would a Turnigy. That being said, I'd buy the turnigy becasue I don't have the money for a scoripon.
Dec 14, 2011, 07:05 PM
Registered User
I've bought this 1250kv to try on it, with a 9 x 7 graupner folder on 3s. I might try it on 4s too if it/ the plane survives long enough.

Havn't even got the plane yet though.
Jan 16, 2012, 03:01 PM
Registered User
my skywalker FPV setup

Skywalker epo v3 , 980 kv motor, 40A esc, 9x6 propeller from bevRC equipments
using or pilane 4S 4500 mah lipo
and 3S 2200 lipo using for ccd cam + gps osd + fpv transmitter

Spektrum dx7 AR7000 2.4 ghz Radio
Hextronic 5A ubec for radio receiver
XEN 700mw 1.2 ghz video transmitter with 3 dbi antenna
Lawmate 1.2ghz video receiver with 6 dbi omnidirectional antenna
690TVL ultra WDR pixim seawolf HD CCTV live cam 2.8 lens
Cyclops osd gps
GoPro 1080p HD
view 10 inch LCD screen

not used FPV goggle, diversity, auto pilot , patch antenna...

skywalker flight weight 1.9 kg

and flights.

FPV Skywalker , Ankara'ya daha yakın (8 min 52 sec)

FPV 1.3 km irtifa , 2.6 km mesafe uçuşları mühye buluşmasından. (9 min 59 sec)

FPV Clouds height 1.4 km & distance 3 km & Bulutlara yolculuk (8 min 51 sec)

FPV Skywalker under the snowing (7 min 43 sec)

25-12-2011 Pazar buluşmamızdan mühye (6 min 15 sec)
Last edited by Omnias; Jan 16, 2012 at 03:15 PM.
Jan 17, 2012, 01:28 AM
Registered User
turboready's Avatar
Wow you got all that range with just dipole antennas?

Thats great, the reception did not even glitch for a single moment.

Videos are awesome.
Jan 17, 2012, 11:28 AM
Registered User
Really nice.

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