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Wandering Sagebrush
Joined: 21 Jan 2005
Posts: 2785
City/Region: Northeast Oregon
State or Province: OR
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Constant Craving
Photos: Constant Craving
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 Posted: Sun Oct 07, 2007 6:55 pm Post subject: Permatrim - Definite Thumbs UP |
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Today we got Constant Craving out on the Willamette between Oregon City and Newberg, and I heartily agree with everyone regarding Permatrim. Much better control of the nose of the boat, and it tracks better at low speed.
For grins, i opened it up with the engine trimmed down, and the boat wanted to lean heavily on the right side. I am not sure if that is prop torque, or just that most of the weight of my boat is on the right, but it was not comfortable. So lesson learned, don't go WOT with the engine trimmed down.
It was a great fall cruise.
Steve |
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oldgrowth
Joined: 27 Jun 2005
Posts: 2196
City/Region: Rochester
State or Province: WA
C-Dory Year: 2002
C-Dory Model: 16 Cruiser
Vessel Name: C-Voyager
Photos: C-Voyager
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| Posted: Sun Oct 07, 2007 9:01 pm Post subject: |
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Steve - I notice that my boat tends to level out (side to side) at higher speeds. At slow speed I list to the starboard, but that is because I am loaded heavier on that side. I haven’t noticed if engine trim makes any difference in the list.
When you say engine trimmed down, do you mean the bow down?
________
Dave  |
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Wandering Sagebrush
Joined: 21 Jan 2005
Posts: 2785
City/Region: Northeast Oregon
State or Province: OR
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Constant Craving
Photos: Constant Craving
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| Posted: Sun Oct 07, 2007 9:07 pm Post subject: Permatrim - Definite Thumbs UP |
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Dave,
Yes, I had the bow down as far as it would go. Like you, I am much heavier on the right side. Kicker, two group 24 batts, and my 246lbs.
With the bow trimmed up, I was pretty level, but it was actually uncomfortable with the bow trimmed down and the throttle open.
Steve |
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bshillam
Joined: 21 Aug 2007
Posts: 783
City/Region: Bellingham
State or Province: WA
C-Dory Year: 1981
Vessel Name: Heaven To Me
Photos: My Heaven
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| Posted: Mon Oct 08, 2007 1:51 pm Post subject: Question on permatrims |
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| Do you have trim tabs? Do they serve the same purpose as trim tabs? The wife and I headed out this weekend and I was impressed with the trim tabs - really made a huge difference on ride quality and comfort at higher speeds. Trimmed down they took about 1mph off but the ride was worth it. I trimmed the engines up at was cooking about 30mph on smooth water. Granted I didn't check the water speed but still thought that was more than enough for the wife and I. |
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Sea Wolf
Joined: 01 Nov 2003
Posts: 8650
City/Region: Redding
State or Province: CA
C-Dory Year: 1987
C-Dory Model: 22 Cruiser
Vessel Name: Sea Wolf
Photos: Sea Wolf
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| Posted: Mon Oct 08, 2007 2:09 pm Post subject: Re: Question on permatrims |
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| bshillam wrote: | <Stuff clipped>
Do they serve the same purpose as trim tabs? |
Trim tabs also allow lateral (side to side) trim adjustment, whereas a hydrofoil works only in the fore-aft plane.
Trim tabs are more efficient at fore aft adjustments, as the motor drive can be kept parallel while the trim adjustment is done with the tabs. In the hydrofoil case, triming with the foil also moves the motor's thrust at different angles to the boat which is less efficient.
Besides simple trim, the one really big advantage of either the tabs or the hydrofoil is to hold the bow down into the chop waves to cut into them rather than to pound on each one.
Joe.
_________________
Sea Wolf, C-Brat #31
Lake Shasta, California
  
"Most of my money I spent on boats and women. The rest I squandered'. " -Annonymous |
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Captains Cat
Joined: 03 Nov 2003
Posts: 7313
City/Region: Cod Creek>Potomac River>Chesapeake Bay
State or Province: VA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Captain's Choice II
Photos: Captain's Cat
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| Posted: Mon Oct 08, 2007 2:12 pm Post subject: |
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I would add to what Joe says in that with widely spaced twins, such as a TC, permatrims would have that side to side effect as well if you trim the engines separately. Seems like you could have the best of both! I plan to get them for CAPTAIN'S CAT! On Edit: Just ordered a pair....not in stock however, they're coming from New Zealand!
Charlie
_________________
CHARLIE and PENNY CBRAT #100
Captain's Cat II 2005 22 Cruiser
Thataway (2006 TC255 - Sold Aug 2013)
Captain's Cat (2006 TC255 - Sold January 2012)
Captain's Kitten (1995 CD 16 Angler- Sold June 2010)
Captain's Choice (1994 CD 22 Cruiser- Sold Jun 2007)
Potomac River/Chesapeake Bay
K4KBA
Last edited by Captains Cat on Mon Oct 08, 2007 2:28 pm; edited 1 time in total |
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Sea Wolf
Joined: 01 Nov 2003
Posts: 8650
City/Region: Redding
State or Province: CA
C-Dory Year: 1987
C-Dory Model: 22 Cruiser
Vessel Name: Sea Wolf
Photos: Sea Wolf
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| Posted: Mon Oct 08, 2007 2:14 pm Post subject: |
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| Captain's Cat wrote: | I would add to what Joe says in that with widely spaced twins, such as a TC, permatrims would have that side to side effect as well if you trim the engines separately. Seems like you could have the best of both! I plan to get them for CAPTAIN'S CAT!
Charlie |
Good point, Charlie! 
Joe. |
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dave
Joined: 21 May 2005
Posts: 381
City/Region: Riverview
State or Province: FL
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: Cocoon
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| Posted: Wed Oct 10, 2007 3:41 am Post subject: |
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| Does anyone have any info about the SE Sport hydrofoil in relation to the Permatrim and others? |
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