Beta85 is the largest whoop style drone for the moment. With 8.5x20 motors and 48mm props, this big drone could stand much of the FPV work in your backyard, without the influence of the breeze.
Here is the recommended parts list for 85mm wheelbase distance brushed drone.
The strut design is very different and actually creates a complete X all they way back to the battery chamber. The struts between the motor mounts and ducts are fragile and break easily. So these upgraded frames stiffen the struts considerably. The struts themselves have a flat cross section which creates more bonding area with the duct.
Here is the review by krachall at RCGroups.
The perfect Tiny Whoop Frame!
This plastic durable package can protect the package from deformation during
the shipping process. ( cubic Shipping)
- 1 * 85mm Whoop clear plastic frame (Fit 8.5x20 motors)