me again. I`m thinking about something special and would like to hear the opinions of all the experts in here:
I went out with my RIB today to test the effect of some Doel-Fins that I`ve mounted on my 75hp Honda because the boat started to become nervous atop 33kn! What happened today? In some ways exactly what I`ve predicted: The boat lost 3kn topspeed, normal due to enhanced drag. The boat now started getting REALLY nervous (dangerous?) from 30kn on, it did what we call "sawing on the outer rails"- so this is a complete desaster? No, because while at displacement- speeds the boat performed much better when I trimmed the motor down, it really lifted up his (too) fat a..! It also had a much smoother pass from displacement to planing, not bad! Since I`m more interested in cruising I`ll leave the fins on- hate going over 30kn on the water in a RIB anyway.... don`t get me wrong, while I was in the german Navy I was on a fast attack boat which was capable of going almost 50kn!!!!
So everything was fine until I looked into german Ebay, look for yourself:
Bought that one right on the spot, will pick it up on the weekend. The jet is powered by a little FIAT engine with 1000ccm and about 40- 45 hp. It`s pretty easy to squeeze another 10- 15hp out of them, just a pair of Weber carbs and a sharper crank will do.... so what about putting this into my Supersport?! Has anyone in here already done something similar? Here are my thoughts:
1. I`m losing weight, the jet-unit should be about 40kg lighter than my Honda!
2. I`ll have the center of gravity moved forward= better trim since the engine doesn`t hang on the outside of the transom but is located on the inside!
3. I`ll keep 4-stroke technology with very cheap parts- you`ll find thousands of these engines in cars
4. I`ll have something special
I`d really like to know what you guys think about this, shouldn`t be so complicated to swap that unit into my hull since I have the templates from the old hull!