Bad list at speed?
 

My 42 Sonic just started lising to starboard to the point that it's getting kinda scary at speed. I can find no obvious cause. Any ideas anyone?

Sean said to check your tabs and see if they are in sync with your indicators and also to do the same with the drives. Also do you have more than one fuel tank? If so make sure that they are the same level in both sides if applicable. Also do same with any other tanks he said. Get back with more info if needed.

this is not rocket science people!! all you have to do is move 1/2 the beer to the otherside of the boat:D

After you have moved the beer, check for Fat chicks.

List
 

Do you have a tie bar? It sounds like the steering is somehow out of whack, or the tabs are. Also check drives and the indicators.

Wannabe

Tabs & Drives seem to be in order. Didn't check the tie bar. Fat chicks? Letr me think fora secondNO!:D

Madcow a friend had a similar problem when I drove the boat the throttles tried to heel the boat over slightly everything else was in order, There was no trapped water and I set the trim at the Ramp to be sure.

Turns out one of the Propellers was the culprit! You would be surprised at the stern lift ! Here is the Problem in the US with propellers !In a Nutshell!

ISO 484/2 is a classification system set up by the International Standards Organization for the Repair and Manufacture of Ship's Screw Propellers.

While the U.S. is not a signatory to this particular standard it none-the-less, allows us A tool to discuss the quality of the propellers.

ISO defines four different classes of propellers. Class 3 which is defined as a Low Accuracy Propeller where the mean measured pitch of the blades have to be within 4% of each other. Class 2 is defined as a Medium Accuracy Propeller where the pitch of the blades must be within 1.5% of the other blades. Class 1 is a High Accuracy Propeller, blade pitch must be within 1%. Finally, Class S, which is a Very High Accuracy Propeller with pitches within 0.75% of each other.

Most propellers are Class 3 or worse. We regularly see pitch variances between blades of a single propeller and between propellers on twin screw vessels of as much as _3/4". This means that there can be as much as 1 1/2" of total pitch difference between two propellers!

So you see it is kind of Wild West here in the States In some cases! Make sure whoever does the props has Prop Scan or the Equivalent to check with !
:)

Boats always list into the wind (never understood why) and it's far more pronounced at the higher speeds when less boat is in the water. It's also more noticable on high freeboard boats like Sonics.

Does it list the other way if you turn around?

Ron - Here's how a certain Swedish (lawn-dart) designer explained it to me: The wind tries to push the front of the boat off downwind, so you counter-steer into the wind. Therefore, you are effectively "turning" (hence the heel into the wind), but the wind keeps you going in a straight line. Make sense?

Who Drives In A Straight Line??? :D

Yes that makes perfect sense. Sort of... Why doesn't it push the back of the boat with equal or more force since there is more surface area for the wind to push against at the stern?

When you drive a lawn dart, does the wind make is lean over as well. Or do the wings flap to counter balance the effects of the wind?

Is this a question for the masked man???? Robin, break out the T2x beacon.

You're right - it does push on the back of the boat as well - but the back of the boat is hooked up to the water (hopefully) by the hull and (especially) the skeg or rudder, so it doesn't move to any real extent. (Unless you're driving through one of those big, turbulent washes that tugboats create as they are trying to push a supertanker into the dock..... :eek: :eek: ) Then, EVERYTHING moves.......a lot.

And yes......lawn darts behave the same way. Physics is physics. :p If the wings start flapping, you need to go see your local composite repair shop. Fast.

BajaBob38's .38 Special, on the other hand......Well, it seems to wander all over the place at any speed, current, or wind condition.....:rolleyes: :confused:

Madcow - sorry we hijacked your thread. So far the prop / drive alignment answers seem to make the most sense. Any signs of a bent or (worse) twisted skeg?

To a certain extent that kinda makes sense. My boat will blast through six footers, no problem. But give me two footers directly on the beam and it SUKS! I'm giong up to the boat today to check the tie bar, and I'll let you all know.

Mad,

Check to make sure all 3 motors are there???????:D :D :D



Dan

Hey Madcow....
 

If you didn't carry all that steak and shimp around in your boat that probably wouldnt be an issue !!!:D

Nothing like good advise from your friends:D

You ever hear the joke about the mom who hung a pork chop around the kid's neck so the dog would play with him? Thats why I carry steak and shrimp.:D