View Full Version : How fast should this boat go?
Kid Mex.
05-08-2004, 01:19 PM
I am going to make this thread kinda vague as not to disclose the manufacturer nor the buyer of this boat. But my buddy needs some advise. My friend is purchasing a 27-29' cat with twin Scorpion motors with dual hydrolic steering and xr drives running 26 pitch 4 blade props, tunnel tab,. The boat is open bow and wieghs about 4,600-4,800 pounds. How fast should this boat be running.
Blown 472
05-08-2004, 01:52 PM
Originally posted by Kid Mex.
I am going to make this thread kinda vague as not to disclose the manufacturer nor the buyer of this boat. But my buddy needs some advise. My friend is purchasing a 27-29' cat with twin Scorpion motors with dual hydrolic steering and xr drives running 26 pitch 4 blade props, tunnel tab,. The boat is open bow and wieghs about 4,600-4,800 pounds. How fast should this boat be running.
68.675 mph:D
Originally posted by Blown 472
68.675 mph:D
Is that on a GPS?
Tom Brown
05-08-2004, 02:04 PM
Originally posted by Kid Mex.
How fast should this boat be running.
The throttles should be at idle in no wake zones.
Originally posted by Tom Brown
The throttles should be at idle in no wake zones.
Like 5mph.
Tom Brown
05-08-2004, 02:07 PM
Sounds right.
He should have a pretty good idea how fast this boat should go then.
Blown 472
05-08-2004, 02:20 PM
Originally posted by HARDCORE-SKI
He should have a pretty good idea how fast this boat should go then.
If not, thats ok, we didn't build it.:D
Tom Brown
05-08-2004, 02:22 PM
I'd say it should go as fast as the salesman said it would go so you've definitely got a good case there, Kid Mex.
1stepcloser
05-08-2004, 02:27 PM
Originally posted by Kid Mex.
My friend is purchasing a 27-29' cat with twin Scorpion motors with xr drives running 26 pitch 4 blade props.
How fast should this boat be running.
Assuming 5100 RPM and a 1.5:1 gear ratio, about 75.3 MPH (http://www.boatpropellers.com/propcalc.html) :)
burtandnancy
05-08-2004, 04:28 PM
1 step; what did you use as a slip factor?
Dr. Eagle
05-08-2004, 04:29 PM
Originally posted by Blown 472
68.675 mph:D
Don't forget to correct for the earths rotation!
Jordy
05-08-2004, 04:31 PM
Originally posted by Dr. Eagle
Don't forget to correct for the earths rotation!
As well as the position of the moon in the lunar cycle. ;) :D
phebus
05-08-2004, 04:32 PM
Originally posted by burtandnancy
1 step; what did you use as a slip factor?
By using the calculator, and leaving the slip factor blank, it comes up with 10%
twistedpair
05-08-2004, 04:32 PM
Does it have Thru-Hulls?:D
Dr. Eagle
05-08-2004, 04:33 PM
Originally posted by jordanpaulk
As well as the position of the moon in the lunar cycle. ;) :D
Ooohhhhh good catch Jordy...:D
Jordy
05-08-2004, 04:34 PM
Originally posted by twistedpair
Does it have Thru-Hulls?:D
Dammit, I dropped the ball on that one. With thru hull exhaust add 8 mph. (4 mph per engine) :D :D
Dr. Eagle
05-08-2004, 04:35 PM
Originally posted by jordanpaulk
Dammit, I dropped the ball on that one. With thru hull exhaust add 8 mph. (4 mph per engine) :D :D
Depending on the amount of water circulating through the engine...;)
mickeyfinn
05-08-2004, 04:41 PM
Not a pump boat so add another 8 or 10.
Dusty Times
05-08-2004, 05:00 PM
The hull manufacture matters alot but I would guess 75 to 90 depending.
I would only trust those speeds to a few builders though.:confused:
Kilrtoy
05-08-2004, 06:05 PM
With thru hull exhaust add 8 mph. (4 mph per engine)
See what happens when I go to the lake and not lurk on ***boat, Some beat me to my own SHIT....
actually the correct version is 4 to 10 single engine 2 to 5
Kid Mex.
05-09-2004, 12:14 AM
Originally posted by Tom Brown
I'd say it should go as fast as the salesman said it would go so you've definitely got a good case there, Kid Mex.
That is why I asked you guys for your opinion! If I were to trust a salesmans word I wouldn't be asking this question!
Kid Mex.
05-09-2004, 12:15 AM
Originally posted by Dusty Times
The hull manufacture matters alot but I would guess 75 to 90 depending.
I would only trust those speeds to a few builders though.:confused:
Thanks for your honest answer
Jordy
05-09-2004, 01:23 AM
Originally posted by Kilrtoy
With thru hull exhaust add 8 mph. (4 mph per engine)
See what happens when I go to the lake and not lurk on ***boat, Some beat me to my own SHIT....
actually the correct version is 4 to 10 single engine 2 to 5
I was splitting the 3-5 difference and calling it 4. Don't worry bud, I was lookin' out for ya. :D
Kilrtoy
05-09-2004, 01:45 AM
I was splitting the 3-5 difference and calling it 4. Don't worry bud, I was lookin' out for ya
Hey FOCKER
You gonna be in town friday night for OP6?
If so i'd like to buy you a HEFE at Baily Bros.
Jordy
05-09-2004, 01:54 AM
Originally posted by Kilrtoy
[B
Hey FOCKER
You gonna be in town friday night for OP6?
If so i'd like to buy you a HEFE at Baily Bros. [/B]
Absolutely. Looking forward to partying with all y'all again. :D
Signed,
Focker. :D
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