Love this thread and want to contribute but I have never been concerned with the actual speed number. I just love the feeling of speed, but in the interests of research I will be quantifying the fleet.
Over the next few weeks plan on taking all the family's RIB's and SIB out for a run with the iPhone gps app. Of course that depends on weather and other commitments.
Anybody wants to take a guess beforehand, you are most welcome.
Zodiac AR340 with a beat up 2001 Yamaha 20hp 2 stroke. Prop came with outboard and i think is 9 7/8 x 11 1/8.
Dockitjet 5.6m with 1996 200hp Suzuki in excellent condition. Has a 3 blade 25 inch prop at the moment. Only ever been run once and bad chime walk at 3000rpm but will raise the motor, put a 4 blader on and some weight in the front to see what will happen.
Ribtec 890SX with twin Yamaha diesel sterndrives 240hp ME421 sti's. Currently had standard Yamaha 21 inch props.
3.2 m no name air floor, inflatable keel Chinese SIB with Mariner 1989 15hp. Not sure of the prop, the only thing i can see on it is A122105P.
Redback Stinger 2.9m rib with Mariner 9.9, about 1990. No idea of the prop.
Zodiac 470 with (2000?) Mercury 50hp. Has a stainless 18 pitch prop.