T4 Quadcopter Mini 250 Drone (5 inch props)

thingiverse

Introducing a compact version of the T4 Quadcopter design, fitting into the "250" class. This mini quadcopter supports 5" props and offers a lighter frame weight of less than 110 grams. The unique feature includes three arm options - 24mm, 28mm, and 30mm motor cup (inside diameter), with the 30mm cup having slots for 3mm motor bolts. It's fully assembled with a strong, simple assembly using 2.5mm zip ties instead of bolts to save weight. The frame is designed for a 3S battery located at the center of rotation/thrust and offers ample space for ESCs concealment and ventilation. The Sketchup file is included, allowing you to make custom changes as desired. The T4 Mini Quadcopter design has gone through multiple iterations with new features like vibration isolating top plate option, low-profile bottom tray, improved attachment methods, and additional layers for mounting the receiver or other items. To assemble, print all parts in PLA using 0.25mm layers, 40% infill, 2 shells, and 3 top/bottom layers. Fit the top plate and bottom tray by sliding them from front to back at a 45-degree angle while pressing firmly down onto the angled guides. Test the fit of arms using T4MiniTestSocket.stl before committing to full body print. Required components include four arms, one body, one top plate, one bottom tray, one battery pin, two posts (optional), and one post plate (optional). Additionally, you'll need 2.5mm zip ties, foam for padding the battery compartments, anti-vibration gel, double-sided adhesive foam tape, soldering gear, connectors, a radio control receiver, and transmitter. Updates to the design include using 12amp Afro ESCs with SimonK firmware, Lumenier 2206-11 motors, Gemfan 5x3 propellers, and a KK2 flight controller. The X8R receiver is recommended for its size despite being too big for the model. For further information on RC copters, refer to the ArduCopter wiki.