250mm Martian II

By Benn on Feb 13, 2017

11  1,452  24

First FPV build, first quad, second drone (the first one was an RCExplorer Tricopter V2).

Photos

Part List

Frame

MartianⅡ 250 250mm 4mm Arm Thickness Carbon Fiber Frame Kit w/ PDB for RC Drone (17 builds)
Banggood.com
$32.14

Flight Controller

KISS FC - 32bit Flight Controller V1.03 (180 builds)
Getfpv.com
$34.99

ESCs

4 x KISS 24A ESC Race Edition - 32bit Brushless Motor Ctrl (121 builds)
Getfpv.com
$107.96

Motors

4 x EMAX RS2205S 2300kv Red Bottom Racing FPV Motor (165 builds)
Racedayquads.com
$79.96

Propellers

4 x Ghost 6030 Blue Propellers For Night Flying LED Illumination Set Of 4 (CW/CCW)
Hobbyking.com
$5.80

FPV Camera

Foxeer HS1177 - NTSC, 2.1 lens, IR Block, Top Connector - Black
Readymaderc.com
$39.99

FPV Transmitter

Foxeer TM25 Switcher 25/200/600mW 5.8G 40CH Mini Race Band VTX – MultiRotorMania (40 builds)
Multirotormania.com
$24.99

Antenna

5.8GHz Circular Polarized Antenna Set-Transmitter and Receiver 90° (RP-SMA)
Hobbyking.com
$8.94

Receiver

Flysky X6B 2.4G 6CH i-BUS PPM PWM Receiver for AFHDS i10 i6s i6 i6x i4x Transmitter (173 builds)
Banggood.com
$9.59

Batteries

3 x Turnigy nano-tech A-SPEC G2 1300mah 3S 60~90C Lipo Pack (3 builds)
Hobbyking.com
$19.38

Power Distribution

RROSD Pro V1 (25 builds)
Redrotorrc.com
$10.00

Radio

Turnigy Evolution Digital AFHDS 2A Radio Control System w/TGY-iA6C Receiver White Mode 2 (11 builds)
Hobbyking.com
$65.00

Misc Parts

Turnigy High Quality 16AWG Silicone Wire 1m (Red)
Hobbyking.com
$1.28

Misc Parts

Turnigy High Quality 16AWG Silicone Wire 1m (Black) (2 builds)
Hobbyking.com
$1.28

Misc Parts

Turnigy High Quality 24AWG Silicone Wire 1m (Red) (2 builds)
Hobbyking.com
$0.77

Misc Parts

Turnigy High Quality 24AWG Silicone Wire 1m (Blue)
Hobbyking.com
$0.77

Misc Parts

Turnigy High Quality 24AWG Silicone Wire 1m (Black) (5 builds)
Hobbyking.com
$0.77

Misc Parts

Turnigy High Quality 24AWG Silicone Wire 1m (Yellow)
Hobbyking.com
$0.52
Show stores (7)

Discussion

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Alpha   Apr 27, 2019  

any video of this flying ?

Benn   May 01, 2019 
1

sure.

Alpha   May 01, 2019 

the video is absolute gold, i think you should try gopro7 hypersmooth for sure

Benn   May 01, 2019 

Thanks a lot, I don't fly very well but it's still nice to get some nice shots :) I've switched to a Runcam split now to save weight, but I can't manage to get a clean FPV feed :(

mogs   Jul 18, 2017  

I'm looking at a very similar build to this but as a complete noob I have doubts about using those 24A ESC's with the motors and props you have chosen. Everywhere I look I see that the combination you have (and I also want) will be drawing over 30AMP's at 100% but the KISS ESC's cap at 30amps. Should I be concerned at this? Obviously i won't go to 100% at all times but when I do, I want my ESC's to handle it if I have the hardware capable to do so?

EDIT: I see you are using 3S batteries which may make this comment redundant. Do you intend to use 4S at any point and if so would you upgrade the ESC's?

Thanks for the help!

Benn   Jul 18, 2017 

Hello Mogs,
I'm a bit of a newbie myself so I probably didn't make the best choices on this first real build...
I'm sorry I can't be of more help, please do tell me if you end up finding I should upgrade the ESCs when I do switch to 4S.
Right now, I'm still learning to fly so I don't often punch the throttle, so no trouble so far... Fingers crossed.

Cheers

mogs   Jul 18, 2017 

Thanks for the reply. Fair enough. I think I might be wrong anyhow. I think I found that the tools used to measure the pull and amperage of these motors actually use ~30% less amps in a real world scenario. I could be totally wrong of course :)

What kind of flight time do you get out of this build? My biggest concern now is that all my calculations tell me that I won't get much more than 3minutes! I'd ideally at least want to gun for 7!

Thanks again!

Benn   Jul 20, 2017 

Sorry, I missed your reply.
Flight time is around 4 minutes (I don't fly very agressively yet).
Cheers

Fulldawwg   Mar 02, 2017  

how is the gui set up? nice build!

Benn   Mar 03, 2017 

Hello Fulldawwg,
Thanks :) I'm happy how it turned out :)
Concerning the Evolution/Kiss situation, I selected S-BUS in the evolution, and "Futaba S-BUS" in the GUI :
https://static.rcgroups.net/forums/attachments/5/3/3/9/8/6/a9783685-251-kiss.jpg
I just had to fiddle around with the subtrim and endpoints in the evolution to get everything going from 1000 to 2000 and have the neutral at 1500.
Tell me if this helps.

Cheers

Fulldawwg   Mar 04, 2017 

Thanks for the tip. I'm setting the kiss fc aside for now until I can get more time to fiddle with it but I'm also getting the kiss all in one for my 3 minutes much build, which I really want to get running once I receive it so I will dedicate more time into configuring that.

Fulldawwg   Mar 05, 2017 

Did some troubleshooting. Still couldn't get S-Bus or I-Bus to work but PPM works no problem.

Whiffles   Feb 13, 2017  

Just finished this up? Might want to update your description. How does it perform?

Show 3 more comments
Whiffles   Feb 14, 2017 

Hmm, not sure what to suggest. Check your solders? Sorry, but I don't have any experience with KISS.

Benn   Feb 19, 2017 
1

I've sent the FC back, hopefully the next one will be fine ☺

Benn   Feb 26, 2017 
1

Maidened it today, it flies great (as far as hovering for a few seconds in concerned :) )

FlyinJerem   Feb 21, 2017  

Hello,

Be carefull, your motors will be drawing to much amps from this poor tiny lipo.

I highly recomand you to get lipo with a bigger capactity, at least 1300mAh.the 850mAh won't be able to provide the current needed and there a risk for them to die in a few cycles.

Benn   Feb 21, 2017 

That's my bad, I had selected the wrong one, I did go for the 1300mAh, I've made the correction. Thanks for your keen eye :)

Whiffles   Dec 07, 2016  
1

Unless you've got a compelling reason to go with KISS you might as well opt for a cheaper Betaflight solution. I like the Omnibus F3 and will be using it on my current build. And if you're going with red bottoms you might as well get the upgraded RS2205S version.

Benn   Dec 07, 2016 

Those are the items I've already bought :) I only found rotorbuilds yesterday.
I found a deal with the ESCs and the FC for 123€, and a set of 4 redbottoms for 70€ so I went for it. Was I very wrong? :)

Whiffles   Dec 07, 2016 
1

You'll be just fine. They're all proven components.

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