Botgrinder Grinderino mini Freestyle Frame (3.5"/5")
3/5/25: DJI O4 compatible
The DJI O4 air unit fits out back just fine, but the O4 camera holes are different from anything previous. Yes, you can technically use a single hole and make the O4 camera work with the cam mounts just fine (we ran it like that). If you do this, we suggest using washers to get more surface area and keep it from moving. That said, we designed an O3/O4 specific cam mount that uses the 2 standoffs for super secure mounting. Be sure to add these to your order if you plan to go with O3 or O4:
7/11/24: UPDATE: 5" arms now an option!
Thanks to a loyal customer we'll call JKS, we tinkered with how the grinderino would fly on 5" motors/props. Long story short, we loved it, Botgrinder loved it, and here we are. Now you can choose a grinderino in 5"!
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!
Specs:
- Arms: 4mm
- Top Plate: 2mm
- Bottom Plate: 2mm
- Mid Plate: 2mm
- Standoffs: 6mm OD 7075 Aluminum
- FC Mounting: 20x20 and 25.5x25.5 (whoop style)
- VTX Mounting: 20x20 and 25.5x25.5 (whoop style)
- Weights: Carbon frame + standoffs 64g (69g for 5"), steel hardware 15g
- Motor Mounting Pattern: 12mm x 12mm and 9mm x 9mm (5" is 12x12 only)
Frame Kit Includes:
- 1x Top Plate
- 4x Arms
- 1x Bottom Plate
- 1x Mid Plate (with press nuts)
- 1x Hardware Kit
- 1x Ummagrip Battery Pad
- 2x Battery Straps
- 1x Set of TPU FPV Camera Mounts
Downloads: