This is a replacement for the metal motor mount for a Dynam (Nitroplanes.com) 1400mm T-28 RC Airplane. It's designed to use a NeoDym 10 size motor (http://www.cermark.com/products/NEODYM-10-series-brushless-outrunner-motor%3A-KV%3A-1,000.html). But you can use any motor that has a 25/19 mm bolt circle and a motor can that is long enough. It has 2.5 deg of down and right thrust built in. I have multiple flights with this with no issues. The above motor flying on a 2000mAh 4s battery I can hang this bird by the prop, no problem. Just use M3 x ~10mm screws to bolt the motor to the mount and some 2.5mm screws to attach it to the firewall.