I am using a YS 140 DZ with an APC 18x8W on 30% nitro. The aircraft flies fast and high throttle on down lines are NO-NO. Please don't do it, you can tear your plane apart doing this, especially your light plane with good power I guess. You may try the APC 18x6W as it is the prop for the OS 160 FX and Saito 180. This prop on my engine turns too fast [8D].

Hope this helps.