40 Knots flat out, I was thinking it would be faster but I'm happy with the boat and the TR props are amazing at getting the boat on the plane from a standing start in 3 seconds.. But this could be the boat design helping.
Top speed (via GPS) is 24mph / 20.8 knots, top speed with the missus, 7mph (limited by her comments on ride comfort).
2010 Zodiac Futura Mark IIC Alu (3.7m SIB) with 2013 Honda BF20D (4-stroke) with stock 4-blade prop (9.25" diameter x 10"). This is 1-up with several hundred pounds of crap aboard. That speed is exhilarating and a little scary. Engine is around 5500 RPM (hard to read the digital tach while being bounced around and looking out for larger waves). I'm sure that with a nice 3-blade stainless prop I'd get a few more mph out of it, but this boat isn't made for that kind of speed on the choppy waves of Puget Sound.
Ive tried a few times to see what mine will do, but the noise from the missus gets too loud so I throttle back
You need to chuck the missus off as it will save weight
On a serious note I reckon your boat should be one of the quickest off the shelf / consumer rib here on ribnet and I would love to know what its top speed is as I must admit I have a bit of a soft spot for hyrdofoils