FlyerBry , thanks for the reply . IMHO I think the .40 will be bulky for the .10 shrike but power wise as I have both the OS .25FX and OS .40 will be in the same ball park, but the .40 will really make it move due to the size of the props you can use. I would check with KEN or some one more experienced than I about whether this size shrike can hold up to such speeds.
Welcome aboard and help yourself to my build thread or asking me questions. I was hoping it would come in handy
now I feel I have helped at least on fellow RC pilot.
If you get away with putting a .40 on the .10 size shrike I have to plan for buying a .60 size engine for my .40 size shrike. Also my OS .40 was some what of a power house I still don't know why but after changing the crankcase it has been nothing but a drag.
GL with your SHRIKE build.