About this 3D model

This is a mini version of my [T4 Quadcopter](http://www.thingiverse.com/thing:261145) design. It uses the same concepts but is completely redesigned to fit into the "250" class of mini quadcopters. This design is suitable for 5" props. If you are after something a little bigger there is now also the [T4 Quadcopter Mini 315](http://www.thingiverse.com/thing:408363) that supports up to 8" props and a 2200mah battery - or just use the longer arms on this model if you don't need the battery space. Check out the whole "T" copter family: - [TX8 Octocopter](http://www.thingiverse.com/thing:753840) - [T6 Hexacopter](http://www.thingiverse.com/thing:246350) - [T4 Quadcopter (10" props)](http://www.thingiverse.com/thing:261145) - [T4 Quadcopter Mini 315 (7-8" props)](http://www.thingiverse.com/thing:408363) - [T4 Quadcopter Mini 250 (5" props)](http://www.thingiverse.com/thing:304237) - [Tubular Crossfire 2 quadcopter](http://www.thingiverse.com/thing:261298) I've added a post on the [forums over at DIY Drones](http://diydrones.com/forum/topics/3d-printed-t4-and-t6) for discussing and improving these designs. ### Videos - [FPV flight by Abormor](youtu.be/iu97fqEjFB8) - [Build video playlist](https://www.youtube.com/playlist?list=PL0qBvLOwYdXwQ9CYtgXDOnvXfrc28UaNF) - [Build video 1: Body assembly](https://www.youtube.com/watch?v=NaGzNY3dDgQ&index=1&list=PL0qBvLOwYdXwQ9CYtgXDOnvXfrc28UaNF) - [Build video 2: Install motors](https://www.youtube.com/watch?v=zut1kLQi3nE&index=2&list=PL0qBvLOwYdXwQ9CYtgXDOnvXfrc28UaNF) - [Build video 3: ESCs and power](https://www.youtube.com/watch?v=moWXMUr9Wls) - [Build video 4: Flight control](https://www.youtube.com/watch?v=lqxaXrBg9x4) - [Frame strength testing](https://www.youtube.com/watch?v=rHAknbRfIsI) ###Features: - completely 3D printable (without support) - fully assembled frame weight less than 110 grams! - strong, simple assembly with no bolts to save weight! Everything is secured using 2.5mm zip ties. - includes three arm options - 24mm, 28mm, and 30mm motor cup (inside diameter). The 30mm cup has slots for 3mm motor bolts (the others are 2mm). - strong braced tube section arms with plenty of room to conceal motor wiring - designed for a 3S battery (1000 - 1500mah) located right in the centre of rotation/thrust (88 x 38 x 22mm capacity). - plenty of space to mount ESCs - concealed but still well ventilated for cooling. - top plate has space for a variety of flight controllers and a Mobius style camera. It also features 3mm mounting holes so stand-offs could be used to add an additional deck of components. Alternatively two hex holes are available to add 3D printed posts and rear upper deck. - RF "invisible" frame - as opposed to carbon fiber or aluminium - Sketchup file included so you can make changes to suit yourself ###History **2 September 2014** [Legs for your T4 Mini](http://www.thingiverse.com/thing:448694) are now available. **12 August 2014** *Version 1.4* New vibration isolating top plate option. This option is compatible with previous body and all other components. It replaces the top plate with one that has mounting points for [65 gram vibration damping balls](http://hobbyking.com/hobbyking/store/__40603__Vibration_Damping_Ball_65g_Bag_of_8_.html) that then connect to a new floating plate to hold your flight controller and camera. New files: - T4MiniVibrationTopPlate.stl - T4MiniVibrationFloatingPlate.stl Also updated Body.stl to slightly raise the arms giving a bit more strength in the arm sockets. **20 July 2014** - Added T4MiniArm30mm7inch.stl so that "blackdice" can experiment with bigger (7") props. Also added T4MiniArm28mm7inch.stl **12 July 2014** *Version 1.3* - Added T4MiniTrayShallow.stl as requested by "p25o1". This low profile bottom tray reduces the available height to 7mm (compared to 14mm original). **(no other files have changed)** **1 June 2014** *Version 1.2* - added T4MiniArm30mm.stl which has a 30mm internal cup to fit motors such as the [Lumenier 2206-11](http://www.getfpv.com/motors/fxc2206-11-2350kv.html). This arm also has slots for 3mm motor bolts (the others are 2mm). - T4MiniBatteryPin.stl has also been updated to add a small tab to make it easier to install and remove the battery pin. **(no other files have changed)** **31 May 2014** No changes to the files but I've just replaced my Multistar ESCs with [12amp Afro ESCs](http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=55241) (SimonK firmware) and its made a huge improvement. Even the cheapo Multistar 1704 motors sound better. I'm about to fit some [Lumenier 2206-11](http://www.getfpv.com/motors/fxc2206-11-2350kv.html) motors so we'll see how that goes... **26 April 2014** *Version 1.1* - improved method for attaching top plate and bottom tray to the body. - slightly increased zip tie hole sizes to make them easier to thread through. - thicker top plate (2mm) with rearranged rubber band and hex post mounting points at the rear. - new posts and plate added to give an additio