Originally Posted by Dirk Diggler
They only imported one, because it didn't perform as it should. I'm not aware of anyone working at Poole Boat Park with 15 years rib experience! They did however have a Evinrude main agent in the yard, who was given the impossible task of making it work.
Hmm, so what your saying is that George over engined the boat. So what would the max kw be on the CE plate of that particular boat? Was it not you that suggested moving the console etc?
Shame he didn't do the test when the bigger motor was on it! I went out in that boat and it wasn't fun.
Dirk, I have not clue who you are, but apparently I must have met you in 2003 in Poole.
Please read my posts properly. I never said George had someone in the yard with 15 years RIB experience. I said George lost a guy with RIB experience that had worked for him for more than 15 years. Can you see the difference here? I do not remember the blokes name, but he was a short, strong chap that had been working for George since he was 16 or something.
The max allowed power on the 555 was intially 52kw, but it was designed for 37kw and up to 34 knots. It was later modified for up to 67kw, but that was a couple of years later.
With the 75 'rude (I am still not sure that actually was a 75hp, the boat was faaaaar too fast for that amount of power) it reached 44 knots. That is more than 20% over the speed it was initially designed for. Try to understand that. If you put a 300bhp engine in a Volkswagen Golf, it will most likely not handle very well. Unless you also change the suspension, brakes etc. So when "everybody" wanted us to make the 555 for 90hp, we changed the hull accordingly. Reckon that was in 2005/2006. It made it slower with the 50hp, but it also made it safe to handle with a 4 stroke 90hp.
According to George Pittock, LC suggested to move weight forward and unfortunately George listened to him. Apparently he had said the CG should be forward of the front step - and that is sooooooo wrong for a 4,8m double stepped hull. So Poole Boat Park started to play around with the console and made a complete mess out of it.
When I came over with a representative of Det Norske Veritas certification bureau, we just tried to understand what they had been doing. We tested the boat and verified it started to chine-walk at aprox 41 knots. For an experienced driver that knows how to compesate for that, it was never a problem, but as a manufacturer we did not want to be liable for potential future problems and asked them kindly to reduce power.
In a world where "everybody" is screaming about the environment we have tried to give our contribution. More top speed with less engine. Problem is nobody wants to listen. People still want to show big muscles to impress the neighbours.
The 555 was made for up to 50hp. People started to put 75 and 90 on it.
The 636 was made for up to 115hp. Almost the only country a 90hp is used, is Portugal. Everywhere else 135, 140, 150 is used and I reckon there is even one in Spain with a 200HO on it.
The 808 was made for up to 225hp. There is one in Portugal with a Honda 150hp and it reaches 47mph. There is one in Holland that has touched the 80mph mark with a 250HO. But the fact is that most 808's in Holland are fitted with 300's. Why? I reckon a big engine compensates for a small.... yeah, you know.
And still they say the important is not the size of it, it's how you use it.
PS. The new RIB 646 VFi is made for 140hp, and the new RIB 737 VFi is made for 175hp. Yeah, sure, but for how long? :-)