ORIGINAL: psgugrad
I forgot to add: I'm a mediocre pilot so I won't fly 3-d anyway....I just poke holes in the sky. I'd like to use the dle 20 as I prefer the beam mounts....just concerned about the plane being underpowered. My first plane was a Kadet LT-40 with a .61fx and the 2 seemed a great match. Never once did I say to my self ''this thing is way overpowered'' It seemed just right and couldn't imagine what a dog it would have been with an fp40!
If you think the LT-40 with a.61 in it is a "great match" then you'll need the DLE30 in that 4*! Dang.... my wife's LT-40 with a .46 in it is way overpowered at just under a 1:1 p/w ratio. Seriously, if it were mine, I'd put the 30 in the 4* .... if not for the power .... the larger prop disc will give noticable prop braking on steep landing approaches and downlines. You'll need a taller landing gear though so consider that when you make the final engine choice.