She's been ready to fly for almost three weeks, now, and it looks good for the maiden tomorrow at the Interlochen Field of the TRAMPS club. One day of 63 degrees, little wind and no rain, and then it's back to winter when the storm moves in Friday.
Dry weight as shown is 18.3 pounds. It took 8 oz of lead and two 2000 Hydrimax packs in the nose to get the CG, which is set at about 4-5/8" back from the LE, as close as I could get my CG machine pads to the fuse. Using the accepted methods of calculating CG, this equals 36.8% of mean aerodynamic chord. I don't mind saying that scares the hell out of me. All my other conventional aircraft fall between 25 and 30%. I've seen a half dozen videos of this B-25 flying OK with the CG at 5", and generally they look pretty good, except there is a noticeable tendency for everyone to "over flare" on landing. I think this is due to pitch sensitivity, caused by being tail heavy. MHO. That's why I went with the CG I did. (Top Flite says 4.5 is ok) I also took some hints from various reviews and forum posts, and put in about half the down trim that has typically been used, and some right aileron trim. I also made the flap/elevator coupling give me a total of 1/4" down trim, instead of adding 1/4" to the existing trim, as one reviewer said that the recommended down coupling was way too much.
I'm leaving the turret, gun packs and decals off until she's had some time in the sun to see if the covering wants to bubble up anymore.
If I can get three good flights tomorrow, I'll feel comfortable taking it to Warbirds Over Paradise in January.
From watching the various videos, I get the impression that this bird is a wonderful flyer. Being 2 pounds lighter than most of them and with more power (55AXs) I'm thinking takeoff should be pretty easy. The Interlochen field has a long runway, and even if the grass is a bit tall, I shouldn't need flaps. I also used some "real" wheels instead of the foam ones, which should help.