Catalyst Machineworks SlamNasty 5" HD Race Quad

By bugsysiegals on Jul 10, 2020

13  569  6

Thanks for checking out my build of the Catalyst Machineworks SlamNasty 5" Race Quad ... HD version!!

I was looking to build a HD freestyle quad and was considering the BangGOD 5" frame when I came across several beautiful SlamNasty 5" builds on RotorBuilds. Because the quad will have a 46g DJI Air Unit and 4x 40g T-Motor F80 motors, I figured the lighter weight 65g SlamNasty frame would help offset this additional weight ... and I just love it's sleek scorpion looking appearance. I'm not sure how well the SlamNasty frame will hold up to freestyle related crashes but figured worst case I can use it for moderate racing/filming of my sons doing motocross, etc., and build another quad for heavier freestyle!! I'd like to recognize and give thanks to @Jayembee67 for designing and sharing freely all the 3D printable parts, which would've taken me forever to design and wouldn't have looked half as nice, in addition to answering endless questions which resulted in an extremely easy, fun, and successful first quad build ... thanks for making my entrance into the hobby so enjoyable!!

With regards to this build, the most difficult part was the tight fit of the battery leads into the back of the frame. The XRotor 60A ESC came with the battery leads pre-soldered and the clearance between the frame and wires was unacceptable for me so I decided to re-solder them. It took me several attempts to get the leads just right since the battery leads ended up touching some component on the ESC when I initially moved them inwards yet not enough inwards and I wasn't comfortable with the frame/lead clearance. In addition, I used soldering wick to remove some of the excess solder from the outer edges of the battery pads to ensure nothing would short out on the frame. Once I was comfortable with the clearance, I covered the battery leads with heat shrink tubing and added electrical tape to prevent the heat shrink tubing from sliding down and allowing the wires to become exposed.

Besides the battery leads, this was my first time 3D printing with TPU and while the printer didn't require any modification, I wasn't happy with the print quality. I printed these parts on an Ender 3 Pro with stock extruder and hotend, Cheps NinjaFlex Cura profile, using 20mm/s print speed, 225C hotend, 60C bed temp, with SainSmart filament. After researching TPU print issues, it seemed I might have moisture in the filament, even though I store the filament in a gallon size Ziploc bag with desiccant, so I baked the filament in the oven for 1 hour at 170F before re-printing the antenna support mounts, and there was a HUGE improvement! At some point I may decide to re-print the rest of the parts but for now I'm ready to fly!!

The last issue I had was related to my Nano Rx which wouldn't show any Telemetry on my Tx. After using a LED Magnifier Desk Lamp I found the 5.5V wire had a tiny frayed strand of wire which was touching the Tx wire. Thankfully nothing was damaged on the Nano Rx and re-soldering the wire resolved the issue. Note to future self ... inspect all soldered wires with the magnifier before powering up the stack.

In addition to the items included with the frame, I added the following ...

  • 4x M3x25mm knurled standoffs ... required in order to fit the ESC/FC and DJI Air Unit
  • 4x 20mm socket head cap hex screws ... these are for this particular ESC/FC stack
  • 8x 14mm socket head cap hex screws ... these are for the motors if you use the front/rear arm braces
  • 8x 14mm countersunk hex screws ... these are for the arms if you choose to use countersunk washers
  • 8x 8mm countersunk hex screws ... these are for the standoffs if you choose to use countersunk washers
  • 16 countersunk washers ... optional
  • 3M Dual Lock ... lighter weight than Ummagrip and seems better
  • 3D Printed parts courtesy of @Jayembee67 -

If you're interested in seeing how this particular quad flies, I've made a YouTube playlist which I'll continue adding my flights to. That said, I've less than 10 hours flying Velicidrone and while I've picked things up fairly quickly, I've a long way to go before you'll see me pushing this quad to its full potential.

Without further ado, here's the photos I've taken during the build process ...


Part List


SlamNasty 5" Race Frame (16 builds)

Flight Controller

Hobbywing XRotor Micro F4 G3 30x30 Flight Controller (2 builds)


Hobbywing XRotor Micro 32bit 60A 4-6S 30x30 4in1 ESC w/ BEC (83 builds)


4 x T-Motor F80 Pro 2200Kv Racing Motor (2 builds)


HQ Prop 5x4.3x3 V1S Tri-Blade 5" Prop 4 Pack - Choose Your ColorBlue (355 builds)

FPV Camera

DJI Digital FPV Air Unit - Ultra Low Latency 720p 120FPS Digital HD


TBS Crossfire Nano Rx (Special Edition) (3 builds)


CNHL Black Series 1300mAh 22.2V 6S 100C Lipo Battery (7 builds)


RadioMaster MasterFire Combo TX16S Transmitter with TBS Crossfire Micro TX V2 (4 builds)


FPV Drone Parts for – FPV Quad Drone Shop – Drone Racing Store (130 builds)

3D Printed

Catalyst Machineworks SlamNasty DJI FPV System Part by jayembee67
See Site

3D Printed

DJI FPV Camera Lens Protector by kenkamm (2 builds)
See Site

HD Camera

GoPro Hero7 Black — Waterproof Action Camera with Touch Screen 4K Ultra HD Video 12MP Photos 720p Live Streaming Stabilization (26 builds)

Misc Parts

4 x Tools for FPV (57 builds)

Misc Parts

Heat Shrink Tube Red and Black - 8 Sizes 150 Pcs

Misc Parts

VIGRUE M2 M3 M4 Alloy Steel Socket Head Cap Screws Nuts Set 1080pcs Assortment Kit with Storage Box, Three Hex Wrenches Included (2 builds)

Misc Parts

ViFly Finder 2 Buzzer - Lost Drone Finder/Locater/Alarm (174 builds)

Misc Parts

3M Scotch 1 in. x 3 in. Black Extreme Mounting Strips Value Pack (14 Strips per Pack)-RF6731-VPESF - The Home Depot

Misc Parts

Capacitor Vanity Label - NOSYes (6 builds)

Misc Parts

4 x M5 Motor Nut w/ Flange (1PC) - Choose Your Color (6 builds)

Misc Parts

8 x M3 Steel Countersunk Bolt (1PC) - Choose Your Size25mm / Black

Misc Parts

8 x M3 Steel Countersunk Bolt (1PC) - Choose Your Size25mm / Black

Misc Parts

16 x M3 Countersunk Washer (1PC) - Choose Your Color (3 builds)

Battery Charger

ProgressiveRC iCharger 308Duo

Soldering Iron

TrakPower TK950 Soldering Iron Station 60W | Chisel Pt. & Pencil Tips | Sponge | Stand & Decals


Metabo HPT 3.6V Cordless Screwdriver Kit | 2 Lithium-Ion Batteries | LED Light | 21 Clutch Settings | Lifetime Tool Warranty | D


#9511 - MIP Speed Tip™ Hex Driver Wrench Set, SAE Standard (3), 1/16", 5/64", & 3/32"


#9512 - MIP Speed Tip™ Hex Driver Wrench Set, Metric (3) 1.5mm, 2.0mm, & 2.5mm


#9011S - MIP Speed Tip Hex Driver Wrench 3.0 mm


Spedix Quad Wrench Prop Tool w/ One-Way Bearing (7 builds)


Smoke Stopper (XT60) by RDQ and BengineeringLabs - Modern LED (12 builds)


Heavy Duty 5 Ply Self-Healing Cutting Work MatDefault Title (2 builds)

Misc Supplies

2 x SanDisk 128GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-128G-GN

Misc Supplies

Plano Double Cover Two Sided Tackle Organizer, Premium Tackle Storage
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MotoRotor   Jul 16, 2020  

Hey buddy - glad to see that you finally got it built and flying! Awesome build isn't it? I'm finding myself flying the SlamNasty more than the BangGod lately, probably due to the weight difference. I'm about to design a GPS TPU mount for the back for longer range flights with return to home enabled.

bugsysiegals   Jul 26, 2020 

Since this is my first quad I've nothing else to compare against but I LOVE putting the DJI FPV goggles on and flying the SlamNasty ... I feel like Top Gun!! LOL

Unfortunately I almost lost the SlamNasty yesterday. I was at my parents house, flew up, and was rotating around to capture the surrounding neighborhood, etc. After a few circles, I went to fly back down only to realize the wind had blown me away from their yard and I'd no idea where I was!! At this time the video started to get choppy and showed 5Mbps. I panicked and started bringing it down before I lost complete control. Eventually the video froze and I slowly let the throttle down to try and land softly. My brother pointed me in the direction he'd seen the quad flying off to and we so we headed in that direction with the Tx to see if the receiver would relink. We walked almost 1/4 mile and I thought I'd lost it for sure and when it eventually relinked and showed 50 on my crossfire connection. I kept heading down the road until it finally reached 100 and shortly after I could hear my Vifly buzzer when I was triggering it with the Tx. As we approached a house we seen several people in the back yard bent over and I was thinking this is definitely not good. I began down their driveway and as I triggered the buzzer I heard it loud in clear in the front bushes of this house so I grabbed it and got the heck out of there!! Thankfully they were just back there doing some sodding and nobody was hurt, no property damaged, and only a broken prop tip and bent props!!

I'd originally wanted to put a GPS module on this build but figured maybe I didn't need it or couldn't because I don't have a FC with barometer; however, after this instance, I'm getting one and not having this happen again. If I had the GPS I could've used the compass to quickly know which direction I was and flown back without issue or worst case activated RTH manually or through failsafe. I'm told as long as I have ~8 satellites linked I'll be fine without the barometer ... do you think this is true or should I be adding a barometer chip? Which GPS are you going to use?

MotoRotor   Jul 26, 2020 

Oh got lucky! Yeah, the GPS is a must considering you'll slowly want to fly further and further away with the digital stuff and comes in really handy. I use the Beitian BN-180, you can find it on Amazon. I don't think you'll need a barometer for altitude. Since the GPS locks onto multiple satallites to get a 3D lock it'll determine your altitude via GPS. One thing to know though - sometimes it takes a while for your quad to lock onto 8 satallites (default min satallite #) before being able to arm your quad...just wait a couple mins.

Jodie Froster   Jul 12, 2020  

It is very impressive that you, without ever flying b4, have chosen the IDEAL set of parts for a 5" build. Nice work with the soldering, insulation, and fitment.
p.s. you should lash your battery cable to your frame somewhere for strain relief. When you start flying faster you have the chance of throwing your battery in a crash. If this happens with no strain relief, sometimes the pad will rip off with the wire, potentially forcing you to replace the ESC. Yours looks like it has a coating on top of pads on the back side, which is better than no pads at all. If you find yourself up against this problem, you MAY be able to scrape the coating off of the bottom of the pads, and still be able to solder to them once (for a sort of "get out of jail free card").
Best of luck with your fpv journey. I would love to know where you learned cable management and soldering like this, very impressive.

bugsysiegals   Jul 26, 2020 

While I believe this FC has battery pads on the bottom, I don't think I can fit the wires underneath, at least not easily on this build, so I'll take your advice and secure the pigtail to the frame in order to prevent ever having this issue, thanks for the generous tip!!

I've soldered many things from my guitar pots/switches to doing the RGH mod to my Xbox many years ago in which I had to solder wires to pads the size of sewing needle tips!! I lifted the pads/traces on something I was soldering long ago which taught me the importance of always using flux paste. It makes a HUGE difference in the ability to make solder melt, flow, and adhere to the most difficult items quickly. I never solder without it anymore and haven't lifted a pad since. If you don't know, you don't need more than a little dab, and you want to exhale while soldering otherwise the smoke will give you a headache and has sticky resins in it which will stick to the inside of your lungs. Once I'm done soldering, I use a Qtip with rubbing alcohol to wipe the solder joints down in order to remove the sticky Brown residue that's left over.

As far as cable management, my dad has OCD and is a perfectionist. Growing up we had to keep the house in perfect order as he'd spot a crumb on the floor like a hawk spots a field mouse from a far distance. In fact, his house is so clean you can literally eat off his garage floor, and while I'm not that bad, it's rubbed off on me as everything I organize from books, to decorations have to be equidistant, symmetrical, right angles, etc. etc., and so goes with any projects I work on. While it's certainly not perfect, I appreciate the compliment! :)

Jayembee67   Jul 10, 2020  

Very nice, it came out really well!

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