ORIGINAL: TCrafty
Maybe it's me but I've always run 10X7 or even 11X7s on my LAs. 10s for the .40 and 11 for the .46. Ilike these engines because they're light. That means Ican put them in smaller airframes and pull the plane around with a 10 inch prop where the designed ball-bearinged engine would only spin a 9X6 or something like that. I'm thinking like the Great Planes .25 T-craft or the Thunder Tigre Lazy Tiger Mustang that Icurrently have a .46LA on the front. It spins a 10X7 4-blade APC prop quite well. Ilove these little "underpowered" engines!
Nope, those are about the normal sizes that most people run on these engines but when looking to make a plane fly the way you the pilot would like it to you have to start testing different sizes and spending a lot of time doing it.
As Minn mentioned though, you can only do so much before you need to buy something with a bit more punch.
Iused almost nothing but the LA .46 engines on my 40 size fun fly planes and loved them but there are better choices when looking for more power. Just takes more money though and right now I can understand that little problem.