Anticrime 3" freestyle quad

By DiAleksi on May 02, 2018

13  1,591  2

A long, long time ago, there was a dream... ok, no so long time ago. At the beginning of the 2018 I started to thinking about all a round quad frame that is light, small enough, simple and easy to maintain. And more important, the Runcam's Split Mini should fit inside nicely. So started to 3d modelling it in Fusion 360. After few versions and prototype printings, there was finally the result I could send for cutting from the carbon fibre sheet.
I'm familliar with Pyro-Drone's Floss v2 and Toothfairy 3" and also with Cherrycraft's Sprout. Those are woderful frames. But none of them suite my thoughts. So designed own version.

So I ended up with these:

  • 3" - Small enough, but feels like a big quad
  • Unibody design - minimalistic
  • Slightly Wide-X - better for freestyle and fewer prop's parts in the camera view
  • 3mm thick plates - good combination of strength and weight
  • Top plate is also 3mm, making it super durable. And it's cheaper to cut all parts from one sheet
  • Plenty of space - no rude fits
  • Only 20x20 - why not
  • Optional spar for the front (and back) arms to strengthen the frame for impacts

For 4 pcb stack there should be 25mm standoffs. For 2 pcb use 20mm standoffs. Widely opened front area for micro camera allow many usage styles. You can mount camera at the lowest position for better protection or highest position with an agle to hide props from the camera view. Minimalistic camera mount is printed in 95A TPU.

There is also a combined mount for Unify Nano VTX and R-XSR RX, printed in 95A tpu. This mount keeps stuff organized and the antenna from unify nano goes directly to top plate's antenna hole. There you can mount a SMA plug or just zip tie the antenna.

At the bottom plate, there is a pockets to hide M2 FC mounting screws from damaging the lipo pack.

Also created new way to mount RX antennas to the quad's arms. Formerly used the zip ties and heat shrinks to mount an antennas. But the zip ties are not flexible enough to take impacts or being catched by the wood's branches :D So this, tpu printed, mounting tube is great solution to be taped under the electric tape.

I use Nano-Tech 850mAh 4S lipo, but flew also with 1300mAh 4S and this quad flew amazingly also with it!

In the photos, you see the gps sensor mounted on top with the mount for Beitian BN-220 sensor.

Photos

Part List

Frame

DiA 3 inch Anticrime 150 quad frame - Dima's blog
Loki.dima.fi
See Site

Flight Controller

6.5g 20x20mm HGLRC XJB F428 Micro F4 AIO OSD BEC Flight Controller & 28A Blhel_S BB2 2-4S 4 in 1 ESC (49 builds)
Banggood.com
$46.99

Motors

4 x RCX H1407 (V2) 3800KV Micro Outrunner Brushless Motor (It's Time to Upgrade Your 1306 Motor) (9 builds)
Myrcmart.com
$47.96

Propellers

2 Pairs Gemfan Flash 3052 PC 3-blade Propeller 5mm Mounting Hole for 1306-1806 Motor RC FPV Racing Drone (28 builds)
Banggood.com
$3.47

FPV Camera

RunCam Split Mini FOV 130 Degree 1080P/60fps WDR Low Latency FPV Camera for RC Drone (8 builds)
Banggood.com
$79.99

FPV Transmitter

TBS Unify Pro Nano 5G8 (97 builds)
Team-blacksheep.com
$19.95

Antenna

Lumenier AXII U.FL 5.8GHz Antenna (RHCP) (148 builds)
Getfpv.com
$14.99

Receiver

FrSky R-XSR 2.4GHz 16CH ACCESS/ACCST Micro Receiver w/ S-Bus & CPPM (928 builds)
Getfpv.com
$20.99

Batteries

Turnigy nano-tech 850mAh 4S 45~90C Lipo Pack
Hobbyking.com
$15.30

Radio

FrSky Taranis X9D Plus 2.4GHz ACCST Radio & X8R Combo w/ case (Mode 2) (52 builds)
Getfpv.com
$244.99

Radio

Banggood.com (15 builds)
Banggood.com
See Site

Goggles

Dominator HD3 FPV Goggles - FSV1076 | Fat Shark (2 builds)
Fatshark.com
See Site

HD Camera

GoPro HERO5 Session (300 builds)
Getfpv.com
$199.99

Misc Parts

Dual BN-220 NEO-M8N GPS GLONASS Antenna Module Ublox M8030 TTL Level RC Drone Airplane (17 builds)
Banggood.com
$10.99

Video Receiver

ImmersionRC RapidFIRE w/ Analog PLUS Goggle FPV Receiver Diversity Module (180 builds)
Banggood.com
$149.00

Radio Module

FrSky R9M Transmitter Module (72 builds)
Racedayquads.com
$34.99

Soldering Iron

MINI TS100 Digital OLED Programmable Interface DC5525 Soldering Iron Station Built-in STM32 Chip (258 builds)
Banggood.com
$53.99
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Discussion

Sign in to comment

cutthenoise   May 02, 2018  

Nice! How would you say this frame compares to the Tooth Fairy? Pros/Cons between them?

DiAleksi   May 03, 2018 
2

Based on my preference:
Tooth fairy 3"

  • 30g with hardware
  • streched-X, good for racing
  • changeable arms, good for racing, bad for simplicity
  • pros
    • stronger arms
    • FC mounting holes on the top plate for upside down builds
  • cons
    • a bit tight for versatile usage
    • no widening for camera and enough room to make super low frame
    • no pockets for FC bolts, requires some protection for battery

Anticrime 3"

  • 29g with hardware (without spar)
  • wide-X, good for freestyle
  • unibody, simple
  • pros
    • optional spars, more crash resistant frame
    • plenty of room for imagination
    • plenty of holes to mount or tie what ever you want
    • super low build possible
    • vtx antenna hole, compatible for mounting the sma-plug
    • pockets for hiding the FC mounting bolts, no damages for battery and easy to stick some velcro or rubber
  • cons
    • weak arms, use spars for aggressive proximity freestyle

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