Hi! This micro frame has been designed from scratch with 3d printing in mind. It is designed to be strong, but as lightweight as possible. It is for 65mm props (or 56mm) with 07xx/08xx motors. The perfect frame for conversion from a Mobula 7 or Trashcan parts for example.

The bare frame weight is only 4 grams! (approx in pla)
It comes in 3 flavours, 16x16 95mm m2m (3.8g), 20x20 100mm m2m(4.0g) and 26x26 100mm m2m (4.2g) for BL whoop conversion.
In my unscientific tests I found the frame can take over 1kg of force before breaking, even in PLA!
And it prints in under 30 minutes!

Use 0.2 layer height with standard 0.4 nozzle.

Increase the number of walls to 10 to force the print to be solid with no infill.

Flip the model over onto the flat side for printing. No supports required. No brim required for PLA (recommended for ABS/PETG). For some reason, I had far better results using Slic3r, even though i usually use Cura. Ensuring a good base layer is important and it seemed to go down easier with Slic3r. But naturally feel free to use your slicer of choice :)

The frame doesn't have a battery mount as part of it, I intend to use small elastic bands (loom bands) to hold the lipo.

*Edit - Whoop versions now have center cross brace to reduce arm flex. (Brace is not required on 16x16 and 20x20 versions as they gain more strength from the electronics stack).

*Edit - 1103 motor mount option just added :D I have made the arms slightly thicker to compensate for the extra motor weight. A high kv 1103 should work great. I don't really recommend anything bigger than 1103.

*Edit 02-04-19 New 1103 beefy edition for both 3 and 4 holes mounter mounts. Designed for 2s in mind hence the extra beef and weight.

**Note, this design is fresh and not yet flight tested! Holes may need to be drilled out to size. (I may add a larger holes version later if requested)

*Tip! Increase scale in Z axis to increase strength!

This design is totally free for the love of our community and hobby! :)

I look forward to seeing those builds!

Cheers!

Chris