Grayskull 7'' Cruiser

By UnderDawg on Jun 01, 2018

67 282 16

This is my take on a 7'' GPS Cruiser. I had intitially planed to use a Futaba receiver ( more range ) but I couldn't fit it cleanly on the narrow rear end. The XM Plus will have to do for now untill I look into crossfire system.

I made a custom mount for the GPS tower using an old carbon fiber motor mount. I've used this mount before and it has worked great and doesn't look half bad either. Anyway I hope y'all like my interpretation of a 7 inch cruiser.

Photos

Part List

Frame	Geprc Mark2-7 7 Inch 300mm 4mm Arm Carbon Fiber FPV Racing Frame Kit w/ 5V&12V PDB for RC Drone Banggood.com	$52.99
Flight Controller	Matek F722-STD F7 30x30 Flight Controller w/ 32K Gyro, BFOSD, Barometer (36 builds) Racedayquads.com	$39.99
ESCs	DALRC Engine 32Bit 40A 3-5S 30x30 4in1 ESC w/ BEC (50 builds) Racedayquads.com	$56.49
Motors	4 x F40 PROII 1600KV Adamantium Grey Pirofliprc.com	$107.60
Propellers	Gemfan Flash 7042 Durable 2 Blade (Black) - Set of 4 Getfpv.com	$3.79
FPV Camera	Foxeer Predator Mini - Super WDR Flight Cam - Black (106 builds) Getfpv.com	$41.99
FPV Transmitter	FX2-ultimate VTX (International Version) (25 builds) Akktek.com	$26.99
Antenna	ImmersionRC SpiroNet v2 5.8GHz RHCP Stubby Antenna (4 builds) Getfpv.com	$14.99
Receiver	FrSky XM+ 2.4GHz Micro ReceiverDefault Title (1158 builds) Racedayquads.com	$15.99
Radio	FrSky ACCST Taranis Q X7 2.4GHz 16CH Mode 2 Transmitter Blue Orange for RC FPV Racing Drone (263 builds) Banggood.com	$139.99
HD Camera	Adorama Adorama.com	$54.99
HD Camera	Caddx Turtle V2 Micro FPV Camera / 20x20 1080P 60 FPS HD DVR - Black (74 builds) Racedayquads.com	$51.99
HD Camera	GoPro Hero5 Session, 1080p (302 builds) Amazon.com	$230.41
HD Camera	GoPro HERO5 Session (302 builds) Getfpv.com	$199.99
HD Camera	Quelima SQ12 Mini 1080P FHD DVR Camera 155 Degree FOV Loop-cycle Recording Night Vision (7 builds) Banggood.com	$16.47
Misc Parts	Cosmos® 100 Pieces Red Color PC Motherboard Screw Insulating Fiber Washers Amazon.com	$5.99
Misc Parts	Holybro Micro M8N GPS Module (11 builds) Getfpv.com	See Site

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Discussion

JJ FPV Nov 17, 2019

WOW!!! Really impressive!

DustyAir Jun 28, 2019

I was pretty sure I wanted the crocodile 7" until I saw your build. This thing is BEAUTIFUL. GEPRC is really taking over. TOP NOTCH BUILD!!!

nerdCopter May 14, 2019

you have meuliple super clean and killer quads, but this one takes the cake. kudos!

UnderDawg May 17, 2019

Thanks!

KryptoSteel24 Dec 25, 2018

What size battery do you use? How much flight time are you getting? And does it fit well on the top plate?

UnderDawg Dec 27, 2018

I'm using a 1500 mAh 4s and get around 7 to 8 min of cruising.

DavidPilot Oct 20, 2018

Nice build, curious to know your AUW?

UnderDawg Oct 21, 2018

Dry weight witghout HD cam and battery is 446g's

DavidPilot Oct 22, 2018

Thanks, that's a reasonably light 7" with GPS.
Do you have any flight footage? Curious to see how the F7 + 32khz handles the vibrations on a 7" setup like this.
Also would definitely reccomend trying HQ 7x3.5x3 V1S props too :)

UnderDawg Oct 22, 2018

Sorry, no footage for now. I killed a motor and ESC in a bad crash some time back and haven't taken the time to get her back in the air. when I do I'm going back to Betaflight and 5s.

Algrpi Aug 29, 2018

How did you wire gps on the mateksys? Any diagram? Nice quad...

UnderDawg Aug 29, 2018

Using the Mateck FC it wasn't that hard, everything is very well labeled. The GPS on the other hand isn't color coded and didn't come with a diagram. I think I got the pinout off a JJRotoGeek video.

Rc Exp Aug 16, 2018

are you running it on 5s/6s or just 4s?

UnderDawg Aug 16, 2018

For now just 4s

vexxedfpv Aug 15, 2018

Nice build man! It really looks great over all! Cant wait to share the 7inch Proto that i am busy building up!

UnderDawg Aug 15, 2018

Thanks! I'll keep an eye out for your build.

dobled Jul 12, 2018

Great Build, that case is for you gopro session? is made in 3D printer? you have the STL file. Thanks

UnderDawg Jul 12, 2018

Sorry, but I don't have the file. I bought the case.https://www.brain3d.co/collections/gopro-mounts-gopro-protection/products/gopro-session-exo-case?variant=5067999248414

RicksterDude Jun 20, 2018

Awesome looking build! Quick question, this may be a dumb question, but how did you get that design on your frame? PlastiDip? Vinyl?

UnderDawg Jun 20, 2018

RicksterDude,Thanks! The frame is hydro-dipped .

Offset Jun 13, 2018

Hi there, wondering where you got those red washers? are they just a paper type washer or plastic? thanks for your time, nice build

UnderDawg Jun 13, 2018

Hey Offset, I listed the insulating washers in Misc Parts for you.

Offset Jun 13, 2018

thanks dood, appreciate your time

Offset Jun 13, 2018

shit, you know I thought those looked like those washers you use to get with 5.25" DVD/CDRW drives back in the day, its awful the price they soak you for bloody paper washers. greedy bastards Oy

lazd Jun 04, 2018

Uhg, those props have so much jello :( I had to switch to HQ V1S 7x3.5x3, those were jello free!

UnderDawg Jun 04, 2018

10-4!! Everyone has been out.. I finally got some HQ's ordered about 2AM this morning..

Reviewedge Jun 04, 2018

Can't wait to see flight some vids.

oTOADIEo Jun 04, 2018

VERY EF'N NICE!!!!! Did you get the compass hooked up on that Holybro?

Show 5 more comments

UnderDawg Jun 04, 2018

Yes, default for now. Not really. Just some hovering in the back yard trying out position hold.

oTOADIEo Jun 04, 2018

Was it able to hold position well?

UnderDawg Jun 04, 2018

I think she did fairly well. Just as well as any of my Naza units have in the same location

Pimpmykwad Jun 02, 2018

how does it fly??? no oscillations???

UnderDawg Jun 02, 2018

Other than a backyard hover I haven't had a chance to do any real testing. I'll be out of town most of the weekend looking at jobs, so maybe late Sunday I can get her up in the air.