250 Quadcopter Multirotor frame for kk2.1 and kk2.0 board by brolfes16

Last crawled date: 3 years ago

All parts can be printed separately on a printer with a build platform that is 5.5" by 5.5" or bigger. It will take about 9 hours in total at .2mm layers.
This is a 250 quadcopter frame that i designed based off of other 250 sized quads. This frame is designed around the KK2.1 board sold from HobbyKing for only $20. It may be able to work for other flight controllers. This frame is in multiple parts so it is easy to replace parts after a crash, everything is held together, including the the KK2.1 board and motors (depending on motors) with M3 screws or bolts (M3= 3mm diameter). Each arm is labeled with the according motor spin and each arm will have to be printed twice, along with each landing gear.
Required bolts, nuts and washers: x20 M3 (3mm diameter) nuts, x16 M3 washers, x16 M3 25mm in length bolts, x4 M3 10mm in length bolts. (Washers are used for the screws for the motors to hold the screws steadier in their place.
The frame has enough clearance for any reasonably sized 3s battery (like 2500) or less.
The motor mounts are in a "X" formation an the mounting holes can mount screws that are 14mm apart to 20mm apart (from one screw across to the other screw)...aka any small motor made for 250 quads will fit. Recommended propeller size is 5 inches.
There are battery strap holes (2 of them) that passes under the kk2.1 board and holds the battery underneath the main frame.
Disclaimer: This has not been printed and tested yet, but it has been assembled electronically and seems to fit fine. I also have built my own 650 multirotor and feel comfortable flying and designing them. If anyone is interested in this print and would be willing to do the first test print, and upload an image on this page for me that would be awesome. At worst, at this stage, you might just have to sand some parts down.