Re: Man that prop pushes (and walks) hard to starboard

[unabated]

Exactly right – at 80% – 2700 I SHOULD be able to run
the engine without it being overloaded (the black
smoke). Not that I WANT to but I should be able to do
it. Now that I have the pitch at 12 inches I feel
better.
alan

— Robert Fine <> wrote:

Hi Adam,

That seems right. I’m wondering why you’d want to
run the engine above
about 2 grand? Sure, the red line is like 3400 rpm,
at least for the W58,
and it has been said that diesels ‘like’ to run at
80% of their max speed
(or 2720 for the W58) (which I think is bullcrap,
mostly because just
because you can do a thing doesn’t mean you should
do that thing), but with
any machinery, running slower is probably running
better.

Not only that, but it’s so noisy at higher speeds…

Bob

On Thu, May 8, 2008 at 4:30 AM, adam silverstein
<> wrote:

Excellent survey question. Cruise 1800-2000, fuel

burn 3/4 to 1 1/4 gph.

Speed 6-6 3/4 kn

-Adam Silverstein(via iPhone)

On May 8, 2008, at 7:05 AM, “Robert Fine”

<> wrote:

Really? I cruise at 1900-2000 rpm at 6 to 6.5

knots. I can get the

engine up to 2400 rpm, but by that point it’s

trying to climb out of the

water. At 1900 rpm it’s burning about 3/4 gallon

per hour. At 2200, it’s

burning nearly 2 gal/hr. Since the gain in speed

of at most a knot isn’t

worth it, I just cruise right along.

What are your experiences with speed/rpm/fuel

consumption?

Bob

On Thu, May 8, 2008 at 3:17 AM, alan P <

<>

> wrote:

I repitched mine from a 13 to a 12. Mainly

because I

thought I should have more engine RPM’s before

the

engine started to bellow black smoke. I have a

W58 and

now can get it past 2800 rpms. Not that I ever

run it

that high, mostly cruise at 22 to 2400.
alan
— Syringa <

<>> wrote:

Patrick

Hope you had a good trip back from Bellingham!

I

have been looking into the prop pull on

Syringa as

you know. (This is when the vessel is under

steady

steaming in forward at 1800 rpm or above)

(not

backing or docking) I don’t believe the shaft

is

off set (if it is it’s not much) and should

not

account for that much pull. The prop may be

over

pitched. I will let you know if or when I

come up

with the answer.

I would like to hear from anyone who has

changed

propellers or reduced the pitch.

Thanks
Don
Syringa

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Fine Software LLC
Your data on the web your way. No kidding

—
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Fine Software LLC
Your data on the web your way. No kidding

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[madsailor]

Hmm, I'll try that on my first outing. I think I can, I think I can, I think I can get to 2700….

On Thu, May 8, 2008 at 4:49 AM, alan P < ([email][/email])> wrote:

Exactly right – at 80% – 2700 I SHOULD be able to run
the engine without it being overloaded (the black
smoke). Not that I WANT to but I should be able to do
it. Now that I have the pitch at 12 inches I feel
better.
alan

— Robert Fine < ([email][/email])> wrote:

Hi Adam,

That seems right. I'm wondering why you'd want to
run the engine above
about 2 grand? Sure, the red line is like 3400 rpm,
at least for the W58,
and it has been said that diesels 'like' to run at
80% of their max speed
(or 2720 for the W58) (which I think is bullcrap,
mostly because just
because you can do a thing doesn't mean you should
do that thing), but with
any machinery, running slower is probably running
better.

Not only that, but it's so noisy at higher speeds…

Bob

On Thu, May 8, 2008 at 4:30 AM, adam silverstein
< ([email][/email])> wrote:

Excellent survey question. Cruise 1800-2000, fuel

burn 3/4 to 1 1/4 gph.

Speed 6-6 3/4 kn

-Adam Silverstein(via iPhone)

On May 8, 2008, at 7:05 AM, “Robert Fine”

< ([email][/email])> wrote:

Really? I cruise at 1900-2000 rpm at 6 to 6.5

knots. I can get the

engine up to 2400 rpm, but by that point it's

trying to climb out of the

water. At 1900 rpm it's burning about 3/4 gallon

per hour. At 2200, it's

burning nearly 2 gal/hr. Since the gain in speed

of at most a knot isn't

worth it, I just cruise right along.

What are your experiences with speed/rpm/fuel

consumption?

Bob

On Thu, May 8, 2008 at 3:17 AM, alan P <

< ([email][/email])>

()> wrote:

I repitched mine from a 13 to a 12. Mainly

because I

thought I should have more engine RPM's before

the

engine started to bellow black smoke. I have a

W58 and

now can get it past 2800 rpms. Not that I ever

run it

that high, mostly cruise at 22 to 2400.
alan
— Syringa <

< ([email][/email])> ()> wrote:

Patrick

Hope you had a good trip back from Bellingham!

I

have been looking into the prop pull on

Syringa as

you know. (This is when the vessel is under

steady

steaming in forward at 1800 rpm or above)

(not

backing or docking) I don't believe the shaft

is

off set (if it is it's not much) and should

not

account for that much pull. The prop may be

over

pitched. I will let you know if or when I

come up

with the answer.

I would like to hear from anyone who has

changed

propellers or reduced the pitch.

Thanks
Don
Syringa

____________________________________________________________________________________

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< ([email][/email])>

()
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< ([email][/email])>

()

—
Bob Fine
Fine Software LLC
Your data on the web your way. No kidding

—
Bob Fine
Fine Software LLC
Your data on the web your way. No kidding

____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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Fine Software LLC
Your data on the web your way. No kidding

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[unabated]

It’s little unnerving at first…..

— Robert Fine <> wrote:

Hmm, I’ll try that on my first outing. I think I
can, I think I can, I
think I can get to 2700….

On Thu, May 8, 2008 at 4:49 AM, alan P
<> wrote:

Exactly right – at 80% – 2700 I SHOULD be able to

run

the engine without it being overloaded (the black
smoke). Not that I WANT to but I should be able to

do

it. Now that I have the pitch at 12 inches I feel
better.
alan

— Robert Fine <> wrote:

Hi Adam,

That seems right. I’m wondering why you’d want

to

run the engine above
about 2 grand? Sure, the red line is like 3400

rpm,

at least for the W58,
and it has been said that diesels ‘like’ to run

at

80% of their max speed
(or 2720 for the W58) (which I think is

bullcrap,

mostly because just
because you can do a thing doesn’t mean you

should

do that thing), but with
any machinery, running slower is probably

running

better.

Not only that, but it’s so noisy at higher

speeds…

Bob

On Thu, May 8, 2008 at 4:30 AM, adam silverstein
<> wrote:

Excellent survey question. Cruise 1800-2000,

fuel

burn 3/4 to 1 1/4 gph.

Speed 6-6 3/4 kn

-Adam Silverstein(via iPhone)

On May 8, 2008, at 7:05 AM, “Robert Fine”

<> wrote:

Really? I cruise at 1900-2000 rpm at 6 to 6.5

knots. I can get the

engine up to 2400 rpm, but by that point it’s

trying to climb out of the

water. At 1900 rpm it’s burning about 3/4

gallon

per hour. At 2200, it’s

burning nearly 2 gal/hr. Since the gain in

speed

of at most a knot isn’t

worth it, I just cruise right along.

What are your experiences with speed/rpm/fuel

consumption?

Bob

On Thu, May 8, 2008 at 3:17 AM, alan P <

<>

> wrote:

I repitched mine from a 13 to a 12. Mainly

because I

thought I should have more engine RPM’s

before

the

engine started to bellow black smoke. I have

a

W58 and

now can get it past 2800 rpms. Not that I

ever

run it

that high, mostly cruise at 22 to 2400.
alan
— Syringa <

<>>

wrote:

Patrick

Hope you had a good trip back from

Bellingham!

I

have been looking into the prop pull on

Syringa as

you know. (This is when the vessel is

under

steady

steaming in forward at 1800 rpm or above)

(not

backing or docking) I don’t believe the

shaft

is

off set (if it is it’s not much) and

should

not

account for that much pull. The prop may

be

over

pitched. I will let you know if or when I

come up

with the answer.

I would like to hear from anyone who has

changed

propellers or reduced the pitch.

Thanks
Don
Syringa

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https://www.pearson424.org/bb2forum/viewtopic.php?p=831#831

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Bob Fine
Fine Software LLC
Your data on the web your way. No kidding

—
Bob Fine
Fine Software LLC
Your data on the web your way. No kidding

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