Inboard diesel powered boats commonly have different
gearing in reverse.

Interesting ..... says who?

I see you and otnmbrd have come crawling back because
of the intellectual nature of the threads I start and reply to.

Some people never learn that taking a beating is not really
necessary. Try starting out on a new foot by agreeing with
me and things might go well for you two pretenders.

CN

"Shen44" wrote in message ...

Inboard diesel powered boats commonly have different
gearing in reverse.

Interesting ..... says who?

Subject: Seamanship Question #15 Props
From:


I see you and otnmbrd have come crawling back because
of the intellectual nature of the threads I start and reply to.

To crawl back, one must first leave. Other than some short trips, been here all
along.

Some people never learn that taking a beating is not really
necessary. Try starting out on a new foot by agreeing with
me and things might go well for you two pretenders.

G I'm neither agreeing or disagreeing, merely asking for clarification.
Seems your sabbatical did nothing to improve your reading comprehension.

Shen

CN

"Shen44" wrote in message
...

Inboard diesel powered boats commonly have different
gearing in reverse.

Interesting ..... says who?

Hey, Capt. Shen,

I just remembered something you said last year when the
discussion about the Pilot of the ferry that crashed
full speed into the dock up on Staten Island which resulted
in several deaths and numerous injuries, was being held here.

At the time I said it was obviously pilot error and the pilot
should be relieved of his Captain's license, fined, imprisoned,
etc.

You maintained that until all the evidence was in no valid
conclusions could be drawn. It seems you were wrong
yet again. I used the evidence found only in the newspaper
articles, considered the evidence in light of my knowledge
of all things Captain and came to the conclusion
that turned out to be the very same the courts found.

I think you owe me an apology for doubting my wisdom
and powers of reasoning. Are you man enough to apologize?

CN


"Shen44" wrote in message ...
Subject: Seamanship Question #15 Props
From:


I see you and otnmbrd have come crawling back because
of the intellectual nature of the threads I start and reply to.

To crawl back, one must first leave. Other than some short trips, been here all
along.

Some people never learn that taking a beating is not really
necessary. Try starting out on a new foot by agreeing with
me and things might go well for you two pretenders.

G I'm neither agreeing or disagreeing, merely asking for clarification.
Seems your sabbatical did nothing to improve your reading comprehension.

Shen

CN

"Shen44" wrote in message
...

Inboard diesel powered boats commonly have different
gearing in reverse.

Interesting ..... says who?

And, you were, as usual, wrong. The fact is that when all the evidence was
brought to light (the key phrase), then and only then was the guy relieved
of his license, etc.

--
"j" ganz @@
www.sailnow.com

"Capt. Neal®" wrote in message
...
Hey, Capt. Shen,

I just remembered something you said last year when the
discussion about the Pilot of the ferry that crashed
full speed into the dock up on Staten Island which resulted
in several deaths and numerous injuries, was being held here.

At the time I said it was obviously pilot error and the pilot
should be relieved of his Captain's license, fined, imprisoned,
etc.

You maintained that until all the evidence was in no valid
conclusions could be drawn. It seems you were wrong
yet again. I used the evidence found only in the newspaper
articles, considered the evidence in light of my knowledge
of all things Captain and came to the conclusion
that turned out to be the very same the courts found.

I think you owe me an apology for doubting my wisdom
and powers of reasoning. Are you man enough to apologize?

CN


"Shen44" wrote in message
...
Subject: Seamanship Question #15 Props
From:


I see you and otnmbrd have come crawling back because
of the intellectual nature of the threads I start and reply to.

To crawl back, one must first leave. Other than some short trips, been
here all
along.

Some people never learn that taking a beating is not really
necessary. Try starting out on a new foot by agreeing with
me and things might go well for you two pretenders.

G I'm neither agreeing or disagreeing, merely asking for clarification.
Seems your sabbatical did nothing to improve your reading comprehension.

Shen

CN

"Shen44" wrote in message
...

Inboard diesel powered boats commonly have different
gearing in reverse.

Interesting ..... says who?

I'll take some of those points - It was me, not Neal, that pointed out
that the gearing could well be different in reverse. I also pointed out
that it would be easily noticeable.

Curiously, his first answer, that the prop was mounted backwards, may
have been a better answer. That doesn't change the handedness, but if
the blade is not symmetrical it will affect the efficiency.



N1EE wrote:
5 points to Neal.

Inboard diesel powered boats commonly have different
gearing in reverse.

Incorrectly installing a RH or LH pitched prop when
the opposite was called for could cause a boat to
run at slower than expected speeds, albeit it would
move forward in the reverse position and vice versa.

Neal immediately grasped that the gear ratio might be
wrong and this could be explained by the boat running
in reverse, and at a lower gear ratio.



Capt. Neal® wrote

If the shaft has a taper there is no way to put it on
backwards so, perhaps, they shipped a LH prop instead
of a RH prop or vice versa? Diameter and pitch could
be identical but it would be so slow if turning
direction were wrong.

CN


"Capt. Neal®" wrote

Remove it, turn it around, put it back on.

CN

"Bart Senior" wrote in


5 points (Impress me with your genius)

You just bought a new boat and notice the prop is old and brittle.

You replace it with an identical prop. After motoring around for a
while you find the top speed of the boat is much lower, estimated to
be 2.5-3 knots and the prop seems to be slipping.

What is the most likely cause, explaination, and cure?

(N1EE) wrote in message . com...
Joe,

Have you considered that the previous owner of a
boat might bave screwed up and put the wrong prop on?

Yes

Then you as the new owner might make the false assumption
that replacing the prop, with an indentical one, would be
a solution.

No, if it slipping as defined by cavitating then its pitch is to
great.
And if I put another opposite rotating prop on it would not be
IDENTICAL.

And I can not think of any marine transmission that does not have the
same ratio forward and reverse.

So all around your question is screwed up.

The only way a identical prop would be slipping and losing speed is
A: The transmission bands are slipping
B: You did not put the woodruff key in and the prop slips underload.
C: The woodruff key is missing in the shaft coupling.

No shame in it Bart, Just admit your wrong.

Joe


Bart

(Joe) wrote in message . com...
(N1EE) wrote in message . com...
5 points to Neal.

Inboard diesel powered boats commonly have different
gearing in reverse.

Incorrectly installing a RH or LH pitched prop when
the opposite was called for could cause a boat to
run at slower than expected speeds, albeit it would
move forward in the reverse position and vice versa.

Neal immediately grasped that the gear ratio might be
wrong and this could be explained by the boat running
in reverse, and at a lower gear ratio.


And you said identical. Identical is not a diffrent rotating prop.
To much rum Bart? WTF.... you usually do much better than this.
Sheeeeeze

Joe




Capt. Neal® wrote
If the shaft has a taper there is no way to put it on
backwards so, perhaps, they shipped a LH prop instead
of a RH prop or vice versa? Diameter and pitch could
be identical but it would be so slow if turning
direction were wrong.

CN

"Capt. Neal®" wrote

Remove it, turn it around, put it back on.

CN

"Bart Senior" wrote in

5 points (Impress me with your genius)

You just bought a new boat and notice the prop is old and brittle.

You replace it with an identical prop. After motoring around for a
while you find the top speed of the boat is much lower, estimated to
be 2.5-3 knots and the prop seems to be slipping.

What is the most likely cause, explaination, and cure?

"Shen44" wrote in message
...
I think you owe me an apology for doubting my wisdom
and powers of reasoning. Are you man enough to apologize?

CN


LOL don't hold your breath waiting.
To date, I haven't seen the final NTSB report of this incident (Jeff seems
to
find these more easily than I [hint]), so I won't comment as to the
validity of
a Federal courts findings.

Shen

Well you're _not_ Neal! Neal is omniscient. He KNOWS what happened Be a
man and apologize!

John Cairns

The issue of whether the city's liability can be drastically limited for the crash turns on whether the ferry management had
"privity or knowledge" of the negligence that led to crash. The ferry pilot, Richard Smith, pleaded guilty in August to seaman's
manslaughter charges, admitting he passed out at the wheel from fatigue and the effects of medication.

Like I said, the man was not fit to pilot that ferry . . . Damned druggie!

The above is from:

http://www.newsday.com/news/local/ne...news-headlines

Now do I get that apology?

CN

"Shen44" wrote in message ...
I think you owe me an apology for doubting my wisdom
and powers of reasoning. Are you man enough to apologize?

CN


LOL don't hold your breath waiting.
To date, I haven't seen the final NTSB report of this incident (Jeff seems to
find these more easily than I [hint]), so I won't comment as to the validity of
a Federal courts findings.

Shen

Shen44 wrote:

LOL don't hold your breath waiting.
To date, I haven't seen the final NTSB report of this incident (Jeff seems to
find these more easily than I [hint]), so I won't comment as to the validity of
a Federal courts findings.


It takes a few years for the NTSB reports to be published. Here's the
current list:
http://www.ntsb.gov/Publictn/M_Acc.htm

The CG reports are harder to track down. And the court findings are
buried in the various appeals courts.