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09-06-2020, 09:32 AM #1Member
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Learning to deal with Chine Walk.
Newby questions.
24’ Superboat Millennium CC. 300XS on a bracket. I gaining confidence runner her faster. Above 60 is when she’ll start to walk.
When it starts I bump the trim down switch a time or two seems to settle out. Then I slowly add some up trim.
Also should I experience much higher steering loads to port as opposed to starboard when it’s trimmed up, or should it be pretty even?
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09-06-2020, 09:44 AM #2
As the prop spins it creates a paddle wheel effect that makes the boat want to turn right. That is the load you feel. When the chine walk starts put the boat into a slight left hand turn and see what happens.
RockTeam Junk
No sparkling wiggles in here, only dump truck grinches.
"Screamin Heathen"
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09-06-2020, 09:48 AM #3Screaming And Flying!
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Bring it up to the speed just before the chine starts. Start with neutral trim. Very slowly raise the r's and play with the trim as you go. The goal is to stop the walk before it gets the boat unsettled. You have to control the boat all the way to top end. Driving thru the walk is not good lmo. Boat walks, slow dn and start creeping up again. Learn why the boat is unsettled. May have to work on balancing the hull better too by moving weight around. Torque in the steering needs to be addressed. It shows the lower is tracking with a "crab" angle which may also contribute to the chine walk. This is one reason I indicated to take it easy on the trim. jm2cts.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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09-06-2020, 09:50 AM #4Member
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Thanks, makes sense and I’ll try it.
Next time out I’m going to take the GoPro and video the lower leg of the motor at speed. I’m also curious about the height it’s set at. I’m running a Torquemaster lower unit.
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09-06-2020, 09:52 AM #5Member
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09-06-2020, 09:55 AM #6Screaming And Flying!
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Just keep it safe and under control is the most important thing. And be patient. Lot of others will have info, as all of us have been thru the learning curve ourselves and have mastered it or found the cause of it if the boats not really drivable. edit.. Neutral trim is where the engine is fairly level in relation to the pad or keel. A 4' straight edge will give you the point where that is. Hold it against the bottom going to front of lower and observe where the cav plate is in relation to the bottom. They should be the same angle for neutral trim.
Last edited by XstreamVking; 09-06-2020 at 10:00 AM.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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09-06-2020, 09:56 AM #7Screaming And Flying!
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What model prop are you running currently?
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09-06-2020, 10:26 AM #8
Assuming that you have hydraulic steering....it has to be TIGHT, no play (squish). System has to be adequate and jam up tight on an outboard Vee. Also, high rake props are great for lifting but that paddle wheel effect is magnified. If everything is right, you just have to learn to drive it out.
1970 15' Allison/135 Chrysler stacker
RC Mod-VP Boats
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09-06-2020, 12:53 PM #9Member
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09-06-2020, 12:55 PM #10Member
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09-06-2020, 12:57 PM #11Member
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09-06-2020, 01:59 PM #12
Any torque tab on skeg?
We have invented the world; WE see
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09-06-2020, 02:17 PM #13
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09-06-2020, 06:02 PM #14Member
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09-06-2020, 06:05 PM #15Member
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