Eachine Racer 250 Battery Tray by KDan

Last crawled date: 3 years ago

The battery tray has now evolved into a multi-purpose part. In addition to the original basic version, there are now two special versions which allow you to add other neat features to your Racer 250. See updates at the bottom of this summary.
Eachine, in their infinite wisdom (not) has decided to save pennies and omit the battery tray from this popular budget mini-quad racer.http://wikirotors.com/index.php?title=Eachine_Racer_250#Versions
The omission of this part in the newest version 5 model virtually guarantees that the CC3D flight controller board will be damaged and the USB connector will be sheared off in a mild crash. This is absolutely ludicrous because 250 class racing quads are specifically designed to be crash resistant.
I have included two basic versions of the part. Both require 2.5mm screws which pass through holes already present on the Racer 250 lower frame (PCB).
One version is for 12mm long screws, and the other is for 16mm long screws. The 16mm version is preferred for greater strength, but the 12mm version can be used if you don't have any 16mm screws. The part is designed to accept standard 5mm hex head M2.5 nuts.
I believe this part should actually be stronger than the original because it doesn't use the skinny little standoffs. It also has a larger contact area with the battery and is more centrally located. There is enough clearance for thin battery straps, but probably not the big fat ones.
Update 3/13/16:
Created revised versions with servo mount point and bracket that is designed to work with my FPV camera tilt mount. http://www.thingiverse.com/thing:1393669
Update 3/18/16:
Created revised versions with a 36x36mm platform and 30.5mm center holes to allow attachment of a receiver mount or other experimental part.
See the 20 degree version of my D4R-II receiver mount as an example.http://www.thingiverse.com/thing:1413058/#files