This guy is GOOD....and not me!

D

David M

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Walking it in sideways has always eluded me.

To this fellow, it's a walk in the park.

LINK
 
Not difficult with a thruster (the whirring sound you hear). Work the screws against the thruster and it walks sideways.
 
quote:
Originally posted by Rub Rails

Not difficult with a thruster (the whirring sound you hear). Work the screws against the thruster and it walks sideways.

Click to expand...


I wondered what the hight pitched sound was. I did not see any thruster wash. I thought it was the transmisions.
 
Yup thrusters. People get into spaces like that everyday at the local YC without thrusters . Opposite rudders and trannys with a little back and forth. Just remember "astern away" every shift of one side to reverse gives a little side push And a shift to forward against the rudder does also the combination in short bursts can move the boat sideways in place.
 
quote:
Walking it in sideways has always eluded me.
Click to expand...


David: Shift one side briefly into reverse a little above idle and see if your boat pushes away from that side a bit. If it does you can walk it.

Small props, rudders and tunnels make it harder but any sideways push is all that is needed. Trawlers with barn door rudders do well.

My boats rudders are small so the boat always turned in the direction of the transmission setting until I learned to only use short in gear shots one side at a time. Use the trannys to twist the bow and individual sides to push or stop sideways movement. I added s suicide knob to my wheel for fast rudder movement.

Practice, practice, practice.

Of course all that is just for showing off. Fenders and springs work too.
 
SOME inboard boats you can do it with just the engines, but not all.
 
This one has been around for awhile. Kiddies stuff with a bow thruster & two engines. Should be able to walk it with just the engines if he was really good. Easy enough to get in there with 1.5 boatlength space with only a single IB.
 
Meh. Unless that really was a coffee grinder, and it was grinding really good coffee, unimpressed. If he was slinging an alongside tow into there, without the thrusters, I'd be mildly impressed.
 
I don't have thrusters but don't thimk that I would have a problem with that situation unless there was a strong wind.
Jim
 
interesting comments on the use of rudders.

in my own case the shafts are wide enough apart AND the 20" blades AND judicious use of (a) throttle and (b) using the throttle AGAINST the momentum of the vessel.

I always leave the rudders straight ahead.

She walks sideways nicely, and really strong when a burst or throttle thrust is used AGAINST the momentum.

this method works well for me and is easy to think through.

RWS
 
Whatever works. Rudders against the trannys is common for large rudder designs.
I too set up momentum then add twist and control position with trannys.
Undocking of course you have no momentum. Use of rudder comes from a lot of single shaft operation.

I agree wind makes it more difficult and not to exaggerate my limited skills I would enter that dock bow first spin then walk the last few feet.
 
quote:
Originally posted by Riverratt

Is the noise from the thruster caused by cavitation?

Click to expand...


In that case it sounds more like motor noise.

You can see thruster wash if you look closely.

And all boats will not walk sideways. Boats with deep prop pockets come to mind.
 
quote:
Originally posted by Riverratt

Is the noise from the thruster caused by cavitation?

Click to expand...


In that case it sounds more like motor noise.

You can see thruster wash if you look closely.

And all boats will not walk sideways. Boats with deep prop pockets come to mind.
 
You can hear the grinder and see the wash at the bow... I don't see what is so special about this maneuver, calm conditions, plenty of room with at least 1.5 times the length of the boat.

Without a thruster All he had to do woudl have been to come in at an angle, put his bow near the wall close to the stern of the boat up there, pass a spring and pivot in. That woudl even work with a single...

This is similar to the pump out dock at bayside here in downtown Miami which is at the end of a fairway with a long pier full of boat on each side. Fairway is about 100' wide and plenty of bigger boats do it all the time with only 20 or 30' to spare.
 
Its still pretty impressive. I doubt most of you here would attempt to do that.
 
There doesn't seem to be much to be impressed by. There seems to be little or no wind nor current effecting him. He had plenty of space, so what is so impressive about it?

Heck, it wouldn't even be impressive without the thruster. And in those conditions even without a thruster there should be no real need to use a spring line to bring you in. Just come in at an angle with some forward momentum, turn away from the dock at the last minute, bring the stern in if need be by stopping your forward momentum with some reverse on the outboard engine, or just stop your momentum with a bit of reverse on both engines as your stern comes into the pier and toss over your lines.
 
Different strokes for different boats. IMO not using the rudders is like hopping on one leg. Yeah you'll get there but...
 
Bill' s got it. I'll add that when you reverse only the outer engine you add a little sideways push as well as stopping forward momentum and converting it into rotation. As the stern comesto the dock a bit of reverse on the inner engine helps stop sideways movement. Multiple brief shifts astern add more push. All this at low rpm.

Remember the pros dock hundreds of times per year. It is the one thing worth watching and learning from pro SF drivers. They mostly like higher rpm than I do however.

Have fun trying and imagining over winter.
 
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