The Magnum XLS .36 is the best .25LA I've ever run!!!
Steve
I have flown mine on everything from a Fox 35, McCoy 40, and OS 40 FP, and all worked well. Mine is slightly modified with a shorter nose, longer fuse, and different verticle fin. The Banshee is a really good flying plane. I think mine weighs around 45 oz.
Some may argue but I agree with Steve, more than a .25 would be wise.
A .35 or even a .40 will give you a good, authorative model. . . .
Here's Norm Skuderin's "Banshee". I believe he moved the wing a bit forward, and I'm pretty sure that's an LA .46 or LA-.40 up front in the first picture . . .
Here’s my story, and I’m stickin’ to it. I was reading about all these guys having fun with FP 21s and FP 25s, so I bought a couple of FP 25s – one for a Brodak
Flite Streak (still in primer since 2001), and one for future use (maybe a
Medic?) The
Banshee at 510 in
2 struck me as being in the ballpark. A closer look at what airplanes are actually being used for those engines confirms what all y’all are politely saying. It was a case of the “If all you have is hammer, every problem looks like a nail” syndrome. I’ve actually never built a plane for less than a .35 since 1950 something, hence my ignorance of the “new” modern .20 to .25 engine comfort zone. Reading Dan Rutherford’s trials with the
Wimpact sheds even more light on the subject, even given the thicker wing of the
Wimpact However, this proves how valuable this forum is. If you are about to do something stupid, and announce it here, somebody will
try to save you

Hey, I have the kit now! Nice wood, nice die cutting.
Nitty Gritty time: Moving the wing forward seems like the best of both worlds – longer tail moment, plus shorter nose for better balance with a blocked boost port FP 35 (I have several of those) and a 1.6 ounce muffler. Stock LE of wing to front of motor mounts on the stock
Banshee is 9 ¾”. Moving the wing forward 1 ½” gives an 8 ¼” nose and a nicer tail moment.
Does 1 ½” sound about right to those of you who have built a
Banshee? I have seen suggestions of 1 to 1 ½ in other threads. (I’d rather have it come out a little tail heavy and add nose weight vs. adding tail weight.) I am also assuming those who lengthened the tail and shortened the nose also simply moved the wing forward. Since I have seen the wing move published (but no verifiable dates), I’d argue moving the wing forward keeps it N30 legal. (Plans copyright date 1975; the N30 legality would not have occurred to me were it not for Alan Buck's
Twister)
I’d like to enlarge the tail also, but that’s probably an N30 stretch. Current tail area is a tad under 16% of the wing area, with an expectedly low TVC using the stock wing postion.
Larry Fulwider