Cold weather pondering-hull design '70's SN |
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MourningWood ![]() Gold Member ![]() Joined: June-13-2014 Location: NorCal Status: Offline Points: 891 |
![]() ![]() ![]() ![]() ![]() Posted: November-29-2017 at 12:45am |
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Have a chance to screw around with (or screw up) an '82 SN hull.
Chatting over beers discussing hull shape and resultant wake shape. Question: what part of the hull is most responsible for the wake shape? Forgiving the bow and perhaps the 1st 3rd of the hull, is the middle impactful or just the rear-most portion? Thinking of 'filling in' the rear side scallops, and removing the keel 'v' from prop shaft back. Wondering how this will affect the wakes..... |
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MourningWood ![]() Gold Member ![]() Joined: June-13-2014 Location: NorCal Status: Offline Points: 891 |
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Oops. Meant 80's SN.
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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The thread title may be appropriate, lol.
I would recommend studying older and newer SN hulls relative to the one you’re considering modifying. Also familiarize yourself with how the different generation hulls handle and ski. You might find that the modifications you’re considering would be a step backwards in terms of hull evolution rather than a step forwards. |
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SNobsessed ![]() Grand Poobah ![]() Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Sounds like something I would do!
However, I usually end up with a dog that won't hunt, after pouring considerable money & time into it. I'd just glue on some wood strips (5200 works good) & try it before doing massive fiberglass work. |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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Me too. I say just do it ![]() |
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Fl Inboards ![]() Grand Poobah ![]() ![]() Joined: January-20-2008 Location: United States Status: Offline Points: 2075 |
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Coming from someone that has been There and done that I would leave it alone and find something more productive to do. Again working in the Engineering Dept and now a corporate field tech at Nautique boat's/Correct Craft now for over 25 years seeing post's like this scare me.
The Inboard boat is a fine balance of executed Genius. The problem when modifying the bottom of an inboard is you have no clue of what you are doing and results could be catastrophic! We don't like to use words like chine lock, rudder stall and misbehaving. If you are looking to make a bigger wake for wake-boarding use water bags or other known weight bags. If you are looking to make a better surf wake there are many after market devices that enhance the surf wake. If you are looking for a better slalom boat then get a modern slalom boat. Hopefully this sinks in and you and your family and fellow boaters do not get put in a compromising position due to Blind experimentation. |
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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MourningWood ![]() Gold Member ![]() Joined: June-13-2014 Location: NorCal Status: Offline Points: 891 |
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So that's a no, then........ :)
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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And Brian, don't even think about messing with the X55 bottom especially the steps. If you don't know already, there' was a patent on the hull
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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How old is that patent? Is he selling his hull design? Wtf
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phatsat67 ![]() Grand Poobah ![]() Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
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Someone jump on that patent if it is timed out. Lots of money to be made there.
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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The patent "BalanStern" & "Stepless-hydro hull" was in the early 60's. when Dunphy used it to made the X55's.
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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The only problem is finding authentic contaminated mahogany plywood. That is if you want to keep it original ![]() |
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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I think M/W should combine features of an 82 2001 and a Dunphy.
He could call it a Dunph Nautique or maybe a Ski Dunphtique. |
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phatsat67 ![]() Grand Poobah ![]() Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
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Make it a Wood/Glass hybrid.
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Riley ![]() Grand Poobah ![]() ![]() Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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I got to think that messing with the hull is not nearly hazardous as increasing the factory hp by 50%-75%.
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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In that case I'd use the Kanye West system to tart it up a bit |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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Extra hp won’t cause bad behavior at normal (stock equivalent) speeds like a hull modification might. I am not afraid of modifying a hull but it’s not something to be taken lightly. It would probably help to understand the purpose of certain hull features before adding, eliminating or changing them. |
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Riley ![]() Grand Poobah ![]() ![]() Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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Are you saying "Just because you have the horse power you don't have to use it"? . |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Yup, all the work on the engine and never a WOT!!!! ![]() ![]() ![]() ![]() |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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I’m saying I’d rather have a 55mph boat that might behave badly at the limit than a 45mph boat that might go up on shore in the slalom course. Presumably boats with engine modifications are still used to ski at normal speeds... I know mine are.
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MourningWood ![]() Gold Member ![]() Joined: June-13-2014 Location: NorCal Status: Offline Points: 891 |
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Pete, I swear, your bottom is safe with me....or from me. I spent good money to have the bottom, keel, stringers, and a few questionable frames redone by a renowned Tahoe builder. I'm convinced the Dunphy ski wakes are better than SN up through the 196 at least. |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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![]() ![]() Brian, Yup, the ski wake of the X has been notorious at least in this area for years. The countless times compliments have been made go back to the mid 60's when the X first came out. Our local ski club even had one as their tow for around 8 years. I believe it's the steps at the aft that flattens the wake so much. I'd say it's even better than a 196! ![]() |
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TRBenj ![]() Grand Poobah ![]() ![]() Joined: June-29-2005 Location: NWCT Status: Offline Points: 21141 |
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Oh boy.
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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"Oh boy" what?? ![]() |
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Gary S ![]() Grand Poobah ![]() ![]() Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Not even December yet,whats going to happen between now and June when the ice finally melts?
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KENO ![]() Grand Poobah ![]() Joined: June-06-2004 Location: United States Status: Offline Points: 10775 |
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It's a world class tubing wake that Pete's talking about here.
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Hollywood ![]() Moderator Group ![]() ![]() Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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Someone put the course too close to shore |
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MourningWood ![]() Gold Member ![]() Joined: June-13-2014 Location: NorCal Status: Offline Points: 891 |
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Good one!! I managed to replicate the original mahogany mold strain in a petri dish, and introduced it into the new wood prior to assembly, so it can come apart as if it's 1965......... :) |
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Fl Inboards ![]() Grand Poobah ![]() ![]() Joined: January-20-2008 Location: United States Status: Offline Points: 2075 |
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I thought this thread was about modification of 80's Fiberglass CC hull's not floating furniture!
LOL!!!! |
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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Duane in Indy ![]() Platinum Member ![]() ![]() Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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Truer words were never spoken. A small change can make a huge difference. Start with taping paint stir sticks along the transom bottom and see what difference it makes Feel sure it will surprise you, it did me!! |
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Keep it as original as YOU want it
1978 Mustang (modified) |
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