Hei, Everyone.

Here is my next build. CROSS5 lightweight racing FPV frame from CrissCross FPV.

Main specifications and features of CROSS5 FPV racing frame:

• True X type frame,
• 205 mm MTM,
• 60 grams weight including hardware,
• Bottom battery mounting,
• 25 mm height of stack,
• 30.5x30.5 and 20x20 stack mounting options,
• 5.1 inch props,
• up to 24xx motors,
• up to 5s 1800mAh battery,
• fits Mini and Micro sized cams,
• up to 90 deg. rotation angle of DVR camera,
• 3 holes for optional mounting of DVR camera,
• fixing points for unversal adjustable CrissCross FPV GoPro camera pod,
• 7075 T6 Aluminium middle plate.

Main description

CROSS5 frame was one of my first frames. The ideas behind CROSS5 frame frame are same as ideas I'm implementing in all my designs.
Frame should be simple, lightweight, durable, easy to assemble and work on.

CROSS5 is simple yet not simplistic. I have added some interesting features that makes the frame unique.
The main core of the frame is 2 mm thick 7075 T6 Aluminium middle plate. Use of Aluminium middle plate instead of carbon fiber sheet brings few major advantages:

• no need for additional hardware, especially self-pinching nuts, they can shred the carbon and become loose over time,
• easier to assemble and work on, everything is connected to one core
• additional torsional rigidity and strength.

Middle plate has 3 holes for connecting of each arm. It is made with one purpose to separate fixing points of arms and FC stack. That deliveres less parasitique noise and vibrations from motors to FC's gyro. Have a look at the picture:

The centre holes (20x20 FC stack) were used for rubber mounts. And they are screwed directly to middle plate without touching arms. But arms are fixed with screws going through other two threaded openings.

And vice versa - using middle holes for FC stack (30.5x30.5), other two is used for fixing of arms.

Top plate is fixed on four 25 mm high aluminium standoffs. That gives plenty of space for most of equipment, in the same time it grants easy access for repair or modification of kwad.

CROSS5 weights around 60 grams, but still is very durable and robust due use of High Strength carbon fiber sheets. Composite sheets for all of CrissCross FPV frames are made from T700 Toray carbon fibers. They are 1.5-2 times more stronger than most frames on market.

Building process

Assembly is easy and straight forward. I will just put some notes.

It is highly recommended to use small RX and VTX. For instance I used FrSky XM+ RX and put it under FC with antennas going to the sides of the kwad.

And small TBS Pro Nano have found place on the top plate right behind DVR camera. But there is still enough space to install any full size VTX over the FC or below top plate.

I like to position battery wires on the back of the kwads. Wires are going on sides and fixed with plastic straps to the frame's tail. Also here on the back I have put big Rubycon 35V 1500uF capacitor.

The total weight of the current build is 293 grams without battery.

Universal CrissCross FPV GoPro camera pod can be installed on the top. It has adjustable viewing angle of camera. You can position your HD camera using 3 steps with 10 degrees steps between them.

Thanks for reading and Happy Flying !!!

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