|Posted: July 26 2010 at 15:01 | IP Logged
Hello Doral lovers ! Quick question...
We've just gotten a 2004 28 foot Doral Prestancia a few months ago, and I was wondering about the proper 'trim tab' settings. The majority of the time, we're cruising a small series of canals, (like Fort Lauderdale) which lead out onto our Lake. Approx. 20 min of dead slow, no wake allowed, then once out on the Lake, we can 'zip' to where ever we want.
Most of the time, our trim tabs are completely down - for NO WAKE, while in the canal. However, when up on plane on the lake, I've accelerated, trimmed up the engines a bit, until the nose (bow) dropped. I continue to trim the engines until the bow feels very 'loose' and the boat actually 'skates' a bit from side to side - but the bow is level. I noted the trim tab level as well.
Question is: When I checked with the Doral manual, it indicated that the "normal' or 'optimal' trim setting was practically HALF WAY UP on the trim tab scale, dependant of course on number of passengers, wieght, wave conditions, etc. My setting, when up on plane and four passengers was only around a QUARTER of the way up.
Which is better? Again, when I tried trimming the engines higher, the boat remained on plane, and the bow relatively level, but the steering seemed quite 'loose' and almost 'floating.
Would that 'feeling' be correct and indicate that I found that 'sweet' spot of success with both optimum planing and trim levels for fuel economy and performance, or not? (Maybe I should get up on plane, choose the right speed I want, and then raise the tab levels until the bow starts to rise itself again - what the Doral manual calls 'porpoising' (like a dolphin I guess...) When it starts to rise, I simply 'back down' the trim tab to level out, and leave it there...(?)
What 'trim' levels are YOU experiencing or using for proper ride and performance? Anything NEAR half way up?
2004 28' Prestancia Owner