I have been flying 800mm planes for a few months now and I love my 800mm Spitfire, so I figured why not make an 800mm FT Mustang?
I have added the plans here.
For an 800mm plane it performs well. It is quick, light in the air and doesn't stall very easily. It looks great and I would give it a B for high wind performance. I flew it today in 15 MPH wind and it got tossed around pretty good but overall held its own. Inverted was great, it liked being upside down.
Slow speed - Not great. I had a few close calls with slow speed stalls. Made landing a bit tricky.
Glides - I dropped speed really fast and had to give a lot of corrections to keep it straight.
Elevator - This bird suffers from the squirrely issue that some warbirds run into where giving it 'too much' elevator will cause a weird tippy, stall type behavior. I had to dial back my elevator quite a bit to get rid of the issue, to the point where I didn't feel like I had enough control over the plane at all times. I could still fly fine but I lost a lot of acrobatic capability.
All in all
I like it. The cons are workable and it's fun to fly. I like how it looks in the air and I got a lot of compliments from other pilots. The 800mm FT Spitfire performs better in pretty much every way so that will continue to be my main go to plane for now, but I won't be putting the 800mm FT Mustang away anytime soon.