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07-14-2008, 09:43 AM
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#1
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Registered
Join Date: Sep 2001
Location: St. Louis
Posts: 3,046
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Question for the experts
Was having a drunken discussion this weekend about the speed at which and MTI would become airborn and flip.
i am assuming that that is primarily the reason for the high insurance. So if you can stay under that speed wouldnt your insurance be cheaper
So my question is what is the minimum speed you could be traveling to get the cat out of water, airborn, and over?????
100, 125, 150, what do you think??
some monday morning discussion -
thanks
Randy Wild
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07-14-2008, 10:58 AM
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#2
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A to Z
 Platinum Member
Join Date: Apr 2004
Location: KC/LOTO
Posts: 9,160
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I would say wind and water conditions play as big or if not bigger role than speed... they aren't gonna blow over unless you stand it up, so unless there are conditions to make that happen, I don't think you are gonna get there on speed alone unless you get into the speeds that you are packing a tremendous amount of air and are running the boat extremely loose to get that speed (200+). Even then you need outside conditions to help "start" the blow over.
The only large cats you see go over are the UIM boats since they are setup for much faster sweeping corners (larger tunnels, more compression, more stern lift).
To answer your question though, I would guesstimate that you would be north of 140 or 150 and have to stand it up pretty tall (think perpendicular) to worry about going over directly backwards.
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07-14-2008, 11:24 AM
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#3
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Charter Member
 Charter Member
Join Date: Jan 2001
Location: Edgerock Baby!!
Posts: 7,169
Neptune 18 CC, 2005 Superboat Y2K
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My buddy just bought a 44. It doesn't really even lift well untill 100 and so far has never even bobbled the frt end up. Since Geico seems to fly pretty flat at race speeds and has run 180 without incident I would suspect at least 140 mph and stupid rough conditions. Of course head winds would change it slightly but it seems like the MTI needs a lot more speed to get lift (as opposed to the 40 Skater we ran with this weekend).
__________________
Chesapeake Bay Powerboat Association
www.cbpba.com
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07-14-2008, 03:15 PM
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#4
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Registered
Join Date: Jun 2001
Location: McHenry, Illinois
Posts: 1,993
39 MTI "Wildcat",
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Go up and over is a rare event and I am trying to think of even one time that has happened in a big cat in flat water. V-hulls and cats can trip/stuff or barrel roll in rough water. Watch the offshore races and see what accidents happen in condtions that pleasure boats are not subject to. Up and over is not a concern in a cat unless it is under 20' long. Outboard drag racers in 18' boats do it once in a while. I used to race the small outboards (18-20') and even then it is rare and always driver error trying to get a little more speed thinking the up button is faster.
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07-14-2008, 03:46 PM
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#5
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A to Z
Platinum Member
Join Date: Apr 2004
Location: KC/LOTO
Posts: 9,160
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it can happen, but probably not a real concern in a pleasure application... another good way is to take another boats rooster tail down the tunnel, that water doesn't compress so well... 
Last edited by Sean H; 07-14-2008 at 03:49 PM.
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07-14-2008, 03:47 PM
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#6
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A to Z
Platinum Member
Join Date: Apr 2004
Location: KC/LOTO
Posts: 9,160
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houston, we have a problem...
Last edited by Sean H; 07-14-2008 at 03:50 PM.
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07-14-2008, 04:18 PM
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#7
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Registered
Join Date: Dec 2005
Location: Flagstaff, AZ
Posts: 285
'05 Sea-Doo RXP 215HP SC-IC
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Nice 
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07-14-2008, 04:21 PM
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#8
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Offshore Cowboy
Platinum Member
Join Date: Nov 2002
Location: Houston, TX
Posts: 1,691
2009 36' 1075 Skater........ "Fast Money"..................... And a really fast big Center Console................ "Fins-Up"
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it depends on if YOU are driving or not, randy!!!! hehe...
call and let me know how my props did on your boat.......
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Throttle-Up, Thanks for the WORLD'S FASTEST, BEST HANDLING, GUARANTEED not to break, CNC Propellers
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07-14-2008, 05:06 PM
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#9
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Platinum Member
Platinum Member
Join Date: Jun 2006
Posts: 1,929
2007 32 skater/710 Ilmors/#6s
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Quote:
Originally Posted by Sean H
houston, we have a problem...
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un f..... ing believable shots ! 
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07-14-2008, 10:06 PM
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#10
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Registered
Join Date: Sep 2001
Location: St. Louis
Posts: 3,046
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So why the high insurance if flipping and rolling are rare ocassions, and it seams that more step bottom Vs are spinning out then why are cats so expensive to insure
Just to sturr the pot a ( i have only driven a 39 MTI with 662s on LOTO with Woods) $500k 39 cig is alot more loose at 100mph than a $500k 39 mti at 115. so the cig is more dangerous but the insurance is triple on the cat. why
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