Have you checked to see if the eng. you have is indeed the Quadra 42. I think most of the one piece wing that you have came through with the Quadra 40's . The newer 2 piece wings had the Quadra 42. From your pictures you have the earlier 1 piece wing. I cannot remember the way you can tell but I do know that one of them has a 2 ringed piston and the other has 1 ring. I have built many of the BYRON P-51's over the years and I still have 2, one with the 1 piece like yours and tnewer 2 piece still in the box. They also came out with the MUSTANG 50 eng. in the later ones. IT would help get a few hundred more rpm if you switch the coil to a G-38. I did that on the one I fly and it did make a difference at first I did not think so but after a few more runs the eng. picked up approx. 300 rpms. If you have any questions please feel free to ask.


thanks bob