Some specs (I used metric because it's easier to do the math with):

1.1 m length, 47 cm wingspan (not quite scale, but it will help the plane slow down and you won't notice the difference)

Hyperflow 56 mm fan w/ 8.6 N (880 g) thrust, 40 A ESC

Airfoil will be Clark Y for wings, NACA 16009 for the vertical stab, flat plate for the horizontal stab

On paper top-speed in SLF is about 38 m/s (85 mph) which is about what I'm aiming for

On paper stall-speed is about 10.5 m/s (23.5 mph) which is a bit fast, but not too bad for an F-104.