Ummagawd Botgrinder Grinderino 3.5″ Freestyle Frame Kit

Introducing the Grinderino.

If you love your Demibot, but wish you had one that’s juuuust a little smaller, your wishes have been granted!

When Botgrinder asked if we can make him a 3.5″ frame, he said he wants something just as good as the Demibot but in a smaller package. It took a bit of adjustment, but I think we hit the mark. As for flight controllers, this frame will fit a single board whoop style AIO, or a 20 x 20 stack. The rear of the frame provides plenty of space to fit a VTX of your choice, and just the same, the front will accommodate any camera. We’ve provided motor mounting holes to fit our Ummagawd Aerolite 1605 3600kv motors, as well as a standard mounting pattern for any other motors you might like to run.

And if you were curious… Yes, this is less than 250g all up weight!

UPDATE: The Grinderino arms are now compatible with 9x9mm motor mounting!

You can find all the related parts in the Botgrinder Grinderino 3.5″ Frame & Parts Collection.

Also check out all our 3″/3.5″ Frames and the rest of our Ummagawd Products!

Specifications:

• Arms: 4mm
• Top Plate: 2mm
• Bottom Plate: 2mm
• Mid Plate: 2mm
• Standoffs: 6mm OD 7075 Aluminum
• FC Mounting: 20×20 and 25.5×25.5 (whoop style)
• VTX Mounting: 20×20 and 25.5×25.5 (whoop style)
• Frame Weight: 65g
• Motor Mounting Pattern: 12mm x 12mm and 9mm x 9mm

Package Includes:

• 1 x Top Plate
• 4 x Arms
• 1 x  Bottom Plate
• 1 x Mid Plate (with press nuts)
• 1 x Hardware Kit
• 1 x Ummagrip Battery Pad
• 2 x Battery Straps
• 1 x Set of TPU FPV Camera Mounts

Downloads:

Grinderino Assembly Guide