If that is all you have right now go for it. Just be prepared to rotate a little faster. Or use a low pitch prop. Just flew a John Lowrey Stuka on 52 foot lines by .015. They are my scale race lines. Power is LA .25 with 10-5 prop. Felt good until third flight when engine decided to go rich at a bad point in outside loop. Plane is fine. the prop and needle valve assemble are trash. I used to fly the log 1/2A's(Scientific kits) on 15 foot of line as that is all I had room for safely.