That AP, I tried to port it to the AME timming (which isnt much different) and make the port windows the same size of the AME (big difference here)
Upon carnage inspection, The piston seized in the cyl, with evidence of the coating of the cyl wall "melting" away from the top of the ports I cut. The lower end of the rod let go. Max rpm I got was 29,400 on the tnc tach. I was very anal about smoothing the edges of the ports after I cut them, and I was skeptical that the hard anodized cyl would not like to have the ports cut into. It seems I was right. The engine was not leaned out all the way when it broke either. I did this same porting excersize on a BigMig revlite cyl, That one has over 16oz of fuel ran thru it and it never did run up to where the AME revlites run for me. But The bigmig never seized either. I think trying to re-port the AP to run with the AME is probably not worth it.
Maybe I will try it again. My goal on the 1/2a proto is to enter a speed contest, I am about a 7hr drive from the L.A. california area and I think it would be a blast, plus I would like to see a good speed event anyway. I have never seen it done nor have I flown a speed c/l plane. Larry's plane looks different from what I read the rules to state. I thought they had to have a clear canopy? So I stole one from a Lil Jumpin Bean Kit I have lol
I probably should start over on my plane, larry's looks like it would kick mine into trainer status.
To get back on topic, I am going to try that APC 4.2x4 prop on my profile speeder. I'm going to be realy late getting this project done. I have to order some .049 parts to put in the .061's I already ordered.....I still feel stupid about that mistake I discovered this morning. DOH!