Swvski1 found this picture and it is the best she has. It may not clear enough for the header, but here it is: jim
Re: Dyne 18 pulling swvski1 The boat is set up to run as flat as possible at slow speeds. It is going about 16 in that picture. jim
Re: Dyne 18 pulling swvski1 Looks nice and flat there. Are you trimmed all the way down with the engine to stay flat or are you doing something else in your set up? The transoms on these boats (the outboards, at least) are designed with a negative camber on the transom. In other words, the transom is at an angle to the boat such that when you trim the engine all the way down, it is actually not perpendicular but is at a negative angle relative to the boat (i.e., it is going to push the nose down).The negative transom angle is popular on the bass boats to give them a very hard nose down push on the hole shot and the outboard ski boats are designed the same way. I was wondering, since your boat was originally an I/O, if the transom did not have that negative camber and - if so - what did you do to overcome that. I know that you can put a "wedge" between the motor and the transom to create a more negative transom angle.
Re: Dyne 18 pulling swvski1 I think the I/O transom has about the same angle, but i am not sure. I did use a wedge to get more tuck and at that speed the motor is full in. My daughters boat (17.6) has a wedge also and I highly recommend them. The motor weighs in at 370 and that helps. Her new motor weighs 303. As the speed increases the weight makes less difference. At speeds above 20 I use about neutral trim. I use neutral or a little above for around the boat so it will dig a little and not uncover the prop in the turns. She says the 18 wake is superior. I use a 17 pitch prop that has the cup removed. The cup especially in the tips will cause the boat to dig more. The Hydrodyne hull responds well to uncupped props, at least mine and my daughter's does. I have tried the doel fins and similar additions to the cavitation plate on the boat when it was an I/O. They do help, but they also create rollers in the wake and you seldom see them on a ski boat. jim
Re: Dyne 18 pulling swvski1 Here are some more pictures. You can see the difference in the angle when it was an I/O. It had less tuck more weight and a cupped prop. Those were the learning years for me. In the bottom picture you can see that it now runs flat even in the turns. If you click on the pictures, they get bigger. The previous post is the same too. jim
Re: Dyne 18 pulling swvski1 The difference is amazing. What did you say the I/O engine weighed in at again?
Re: Dyne 18 pulling swvski1 Mark, I think I said 950, but that is for a Ford. Mine was a Chevy 305 Mercruiser model 898 and it weighed 1000 pounds, but the weight was mostly forward of the transom so it would not be the same as a 1000 pound outboard. It is amazing to me that the little hull could deal with it. I never ceased to be amazed at this design. I have had 5 people in it when it was an I/O. 5 is no big deal now. jim
Re: Dyne 18 pulling swvski1 Now those are pictures that I can use. Nice and wide. You have a beautiful area, much different then Pensacola (I was stationed there while in the Navy) Daniel
Re: Dyne 18 pulling swvski1 Daniel, Here is a wider version of the first one. The top picture in the above post was taken at our summer home in the Upper Peninsula of MI which I sold a few years ago. The log cabin in the background actually belonged to my folks. Our place is not in that picture. The bottom picture in the above post is here at our lake in FL. I have a lot of relatives in Pensacola. I like the white sand beaches. The picture in this post was taken at a tournament in Rockford IL on the Rock river. jim
Re: Dyne 18 pulling swvski1 All of these pictures were made possible by the man, the myth and the legend:
