Hi,

Here is one of my latest design, the Ripple 4B, it works on 4 and 5S. This is the most powerfull 4 inch quad i saw. The speed and weight to power ratio is increadible! see video.
The complete frame weight is 39.9g, which is excellent for a 4 inch 2204 motor capable 4" frame. The RTF weight without battery is 187.g. The beauty and ultime performance of design simplicity.

Rcgroups thread: https://www.rcgroups.com/forums/showthread.php?2932884-New-BDR-Ripple-4