Original idea

Here’s DXF design of Joerg’s original design. The holes in the file are 3.5mm but those are bit tight for 5mm tube that I used. I suggest 4.5mm – 5mm holes if you use 5mm silicone tube.

slingshot dxf

Yes, it’s my own version of Floss 2.1 originally designed by KababFPV.

4mm dual-arms, 3mm bottom plate, 2mm top plate.

AUW (just add battery) 320gr (with props, VTX antenna, strap etc..)

Specs:

– Nema 17 steppers (Bipolar, 200 Steps, 42x42mm, 12V, 0.33A)

– A4988 Chinese stepper drivers

– 3S (12.6V) battery

– Arduino Pro Mini (5V, 16Mhz)

– Turnigy Evolution transmitter and TGY-iA6C Receiver

– MPU6050 gyro

Two 90mm 5V PC fans, 6.5mm birch plywood.

No self-milled or 3D-printed parts here. Just for the setup:

Camera: http://www.ebay.com/itm/252416912486 (FX797T 40CH 5.8G Mini Transmitter TX with 700TVL, 120 degrees, 4.5gr)

Body: http://armattanproductions.com/pages/kit_detail/273 (two plates 31gr +spacers+nuts)

Motors: DYS BE1104 6500kv Brushless Motor (about 6gr)

ESCs: Sunrise model Cicada BlHeli-S 15A 2-4S

Props: https://flexrc.com/product/rotorx-rx2535w-props-8-cw-8-ccw/ (63mm in dia)

FC: Naze32 (betaflight 2.9, default PIDs worked fine!)

Total weight without battery: 130gr + battery approx 40gr

Outer diameter: 155mm x 155mm x 28mm (without camera dome)

M2M: 110mm

Flight Time: 370mAh 3S: 3min 20sec, charged 360mAh = Average current 6.7A (1.675A per motor)

This is a reincarnation of my alien-clone. The arms+motors+ESCs were transferred from old quad. Middle plates were milled only. Got this idea on saturday evening, maidened on monday-evening. Fastest quad I’ve had so far by all means, it also flies quite fast!

Arms 4mm thick, 14mm wide. Base plates 3mm thick. FC luxx with non-released betaflight 2.7, default PIDs. Camera angle: 35deg (angle at it’s max limit IMHHO, my personal preference would be 30deg). Motors SunnySky 2204 2300kv, rotorgeeks 20A escs.

Measured speed with Stalker radar gun (4S2-blade 5″ dalprop): 120-125km/h (at the same time – about same setup Vortex Pro: max 100km/h)

Practice track video:

https://www.youtube.com/watch?v=-jY2NqMvOaU&feature=youtu.be&t=1m9s