Moderated Discussion Areas
ContinuousWave: Whaler Performance
|Author||Topic: RE: TURBOLIFT|
posted 10-21-2003 07:09 PM ET (US)
Please someone give me the URL for grand island marine. I have searched the web and ended up under a deluge of trekkies !!!
$29 if it doesn't stop the porpoising little lost
posted 10-21-2003 07:57 PM ET (US)
They don't have a web site. Old fashioned phonage is required: 321-452-8126 is the last number I have for them. Area code may have changed.
posted 10-21-2003 09:04 PM ET (US)
Check in MARKETPLACE--maybe you can find a used one that was only run a few times.
posted 10-22-2003 12:24 AM ET (US)
Is thiS what you are after?
posted 10-22-2003 03:46 PM ET (US)
This was in a previous post:
posted 10-22-2003 05:22 PM ET (US)
Rick has nailed it
posted 10-22-2003 11:15 PM ET (US)
I like the part about how it "stores energy" and has "energy chambers."
NASA ought to look into this thing.
posted 10-23-2003 10:42 AM ET (US)
Caught that, too - must be kind of like flubber?
posted 10-23-2003 11:15 AM ET (US)
I still think you oughta replace the bow-lifting prop to address the porpoising issue before using a fin. If motor is mounted high so the fin is out of the water at higher speed and not producing drag, how is it going to hold the bow down, particularly trimmed out?
Here's what Merc has to say about your Laser II prop:
"Amazing bow lift" is the last thing I'd want on a porpoising boat.
posted 10-23-2003 01:00 PM ET (US)
yeah i follow, but the boat is fine at high speed say 30mph up, its at lower speeds 25 ish that she will tend to sit lower down at the stern and porpoise.
To be perfectly honest a new ss prop at the moment here in the uk will cost around $600 and having run the idea of trying a few past local dealers, I did not get a warm reception. Which will mean I'll have to buy before I can really tell if its improved the problem.
Am I unrealistic to expect the boat never to porpoise, or is It possible that I need to control the trim better, trimming in will stop the problem but the engine note changes and the feeling is that the boat is not running in the sweet spot so to speak.
I have read much discussion on the site and many posts seem to imply that the turbo-lift or Doel fin are the answer?
as you can probably tell I am now going round in circles with more questions than answers.
thank you all for your input.
posted 10-23-2003 02:10 PM ET (US)
I went thru the same drill with the prop change out and while it helped a little especially with the bow lift out of the hole the porposing was still there until I down trimed all the way to the stop. The addition of the Turbo Lift gave me back trim to the mid rage of my digital display with out noticable loss of speed. I now trim up once on plane from a digital # two positon start out of the hole until the porposinging starts and then back off to down trim a bar or two (4 per # notch) with 5 notches on display. 5 being the up trim top end. It seems to like it between # 2 and #3 depending on weight and location of passengers/gear.
posted 10-23-2003 02:25 PM ET (US)
I understand your perspective, Chris. While I'm generally not in favor of fins on a properly designed and loaded hull, I'll just wish for you that the turbo lift solves the problem. Sounds like it's happening as the boat wants to fall off plane, and the fin may do the job in that case.
posted 10-23-2003 02:35 PM ET (US)
Ill probably give the Doel fin a go, as it is easy to buy in the UK and just see where we get too. if it doesn't work I have to start looking at props.
posted 10-23-2003 03:48 PM ET (US)
thanks for the post sounds good I will try the fin first as like yous the boat doesn't really want to respond to trim at least as much as I expect it to.
my only other experience with PTT is on a larson 18sei and she was much more effected by trim position.
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