The file 'Adjustable Electric Motor Mount For RC Plane (NTM 42-58) 3D Printer Model' is (stl) file type, size is 16.2KB.
This is an electric motor mount designed for my Phoenix Edge 540 (55.5" wingspan). It is made to work with any of the cheap 42mm NTM prop-drive motors from Hobbyking. I made it to be roughly the right length so that the prop on the electric motor when mounted sits at the same length from the firewall as the prop did when on the original nitro motor.
Motor mount holes are roughly 48x48mm (designed to be used with the aluminum plate that is included in the NTM prop drive accessory kit also from Hobbyking). Firewall mounting holes are approximately 45x45mm. All holes are 4mm so should work fine with 4-40 hardware or 3-4mm hardware.
The mount is likely extremely over-built but I went for safety and durability! On 6s (22.2v) this motor is going to pull like crazy!
Motor:
http://www.hobbyking.com/hobbyking/store/__70917__NTM_Prop_Drive_Series_42_58_500kv_1300w_AR_Warehouse_.html
Motor accessory kit: http://www.hobbyking.com/hobbyking/store/__70914__NTM_Prop_Drive_42_Series_Accessory_Pack_AR_Warehouse_.html
UPDATE: I have now uploaded an updated version of the mount that features adjustable mounting positions.
adjustable_electric_motor_mount_for_phoenix_edge_540.stl | 42.7KB | |
electric_motor_mount_for_phoenix_edge_540.stl | 45.9KB |