Like Tree0Likes

Speed Rails - fact or fiction?

Reply
Old 12-04-2002, 10:36 AM
  #1
Charter Member
Charter Member
Thread Starter
 
Cignificant's Avatar
 
Join Date: Oct 2000
Location: Richmond, VA
My Boats: 2003 33' Donzi ZX
Posts: 1,679
Default Speed Rails - fact or fiction?

So, what do you all think? Anybody tried them, or is this snake oil?

http://www.thunderoffshore.com/roca.html
Cignificant is offline  
Reply With Quote
Old 12-04-2002, 10:45 AM
  #2
Registered
 
Back4More's Avatar
 
Join Date: Feb 2002
Location: Lake Michigan
My Boats: 353 Fastech
Posts: 6,624
Default

Interesting results...5-18% speed gains.
I rack my boat and they have problems without those things.
Back4More is offline  
Reply With Quote
Old 12-04-2002, 11:06 AM
  #3
Registered
 
Mark in So. MD's Avatar
 
Join Date: Mar 2002
Location: Solomons Island, MD
Posts: 885
Default

Canada Jeff, you bring up a very good point, seems most bunks(trailer or lift) lift right where those are mounted.

Also, so who will be the first guinea pig to try these things. Probably...........no one?
Mark in So. MD is offline  
Reply With Quote
Old 12-04-2002, 11:19 AM
  #4
Registered
 
VelocityMike's Avatar
 
Join Date: Feb 2002
Location: Annapolis MD
My Boats: Boatless
Posts: 433
Default

By looking at the picture I would agree that a tralier, rack or lift might do damage. I would also tend to think that there are boats out there that would not benefit form those things. My velocity rides on a pad which means I am already on top of the water. Warlocks and Fountains do the same thing so I would think that these are meant for older more deep v hulls.

An example of that would be an older Scarab vintage 1986 or so. These boats have no pad nor do they have a stepped hull, at that time, so they ride deep in the water. By using these speed rails they force water down pushing the boat up out of the water creating less drag and faster speeds. Remeber this only makes sense in theory. I think they would work well for some people and not well for others and the application needs to be looked at closely first.

Although Mark your Sonic is a true deep v hull maybe we should put some on and try it. After that you might not want to sell it

Oh yeah sorry for calling so late last night.
VelocityMike is offline  
Reply With Quote
Old 12-04-2002, 11:51 AM
  #5
Tom
Registered
 
Tom's Avatar
 
Join Date: Oct 2000
Location: San Diego, CA
My Boats: 2000, BatBoat B24
Posts: 519
Default

I have speed rails integrated into my batboat and believe they are part of the reason my boat runs so extremely well in calm and rough water. I posted positive comments about them on OSO when I noticed the ad and requested info from thuderoffshore. They never even returned my email. Seems like a waste of ad dollars to not even follow up on prospects.

I contacted Ocke mannerfelt who invented them www.ocke.se and he got back to me right away. Anybody interested in boating should visit ocke's site as he has designed everything from huge ships to ribs to batboats.
Tom is offline  
Reply With Quote
Old 12-04-2002, 11:56 AM
  #6
Charter Member
Charter Member
Thread Starter
 
Cignificant's Avatar
 
Join Date: Oct 2000
Location: Richmond, VA
My Boats: 2003 33' Donzi ZX
Posts: 1,679
Default

I had thought about the trailering problem, but they would not hit my bunks. The strap issue is something I had not thought of.
__________________
Steve Gresham
'03 Donzi 33ZX
Cignificant is offline  
Reply With Quote
Old 12-04-2002, 12:15 PM
  #7
Registered
 
Shorty's Avatar
 
Join Date: Apr 2001
Location: LOTO / Overland Park, KS
My Boats: 1999 Mach1 290
Posts: 375
Default

Would you have to screw those things on to your nice water tight hull? Not sure I like that!
Shorty is offline  
Reply With Quote
Old 12-04-2002, 01:53 PM
  #8
Charter Member
Charter Member
Thread Starter
 
Cignificant's Avatar
 
Join Date: Oct 2000
Location: Richmond, VA
My Boats: 2003 33' Donzi ZX
Posts: 1,679
Default

Quote:
Originally posted by Mach1Shorty
Would you have to screw those things on to your nice water tight hull? Not sure I like that!
I asked them the same thing. I'll post the response when I get it.
Cignificant is offline  
Reply With Quote
Old 12-04-2002, 01:56 PM
  #9
Intolerant1
Guest
 
Posts: n/a
Default

I was looking at these as well. My hull has a rounded keel (92 Four Winns Liberator )and large strakes. I can see where the rounded keel would push water out to the sides more. I would want to mount them with 3M 5200. From what I have been told, you would not need screws with 5200 but would damage the hull if one got ripped off.
 
Reply With Quote
Old 12-04-2002, 02:11 PM
  #10
Mike J
Guest
 
Posts: n/a
Default

Speed Rails were or still are a
product that Volvo Hi-Performance
came out with in the Mid 90s I
beleive, I was involved in the
Early Bat Boat and Volvo during
that time.
The Boat was the Rain-X A-50 and
te speed rails were added to the
bottom but I did a full inline
Canopie at the same time so the
Boat rode a lot different.
At This shop Speed Rails were
added to a 29ft Scarab but were
Scuffed off in the Rough SoCal
Water and never put back on.
The Rain-X boat went to Florida
for a season and returned to SoCal in 1996 for a APBA race in
Ventura and I noticed the Speed
Rails had been removed.
Hope this answers some of the
Questions.
Mike J.
 
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
z.zuperboat
Superboat
2
05-23-2003 11:03 AM
blown formula
General Q & A
7
12-10-2002 11:21 PM
Tom
General Boating Discussion
8
12-01-2002 10:19 AM
Gumbydammit
General Boating Discussion
4
03-30-2002 06:31 PM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 09:03 AM.


Copyright 2011 OffShoreOnly. All rights reserved.