At what rpm, which engine, what speed, what's your hull speed?


"Donal" wrote in message
...

"Jeff Morris" wrote in message
...
snip

Further your fundamental claim is flawed because Donal's 28 hp engine is
probably run at reduced throttle and actually puts out about 12 hp to
cruise at
80% of hull speed. (I'm just guessing because I don't know the details of
his
boat or engine.) He probably uses slightly over a half gallon to go
about 7
miles. Doing that, 10 Imperial Gallons is plenty to get him over to
France and
back.

On a flat calm, I can do 74 miles on about 7.5 gallons. If it isn't flat
calm, I usually get assistance from the wind.


Regards


Donal
--

"Jeff Morris" wrote in message
...
At what rpm, which engine, what speed, what's your hull speed?

2300, Volvo 30hp, 6 kts , 7.2 (I think)



Regards


Donal
--

Time for the meds again, jaxie, reality is slipping away pretty fast!

Just to test you theory that I scoured the 'net in search of an engine that
didn't match your claim, I checked the Westerbeke site for the other diesel I've
used, the 30B. At WOT it gets 17 hp/gal/hour, however, if you back off to 3000
rpm it goes up to 24 hp/gal/hour, and at 2500 rpm it goes up to 30 gal/hp/hour.
Even if you just look at propeller output instead of engine output, the number
is well over the value of 16 you claimed.

As for my "mileage," this discussion started from various claims of actual fuel
usage that you dismissed as silly. I think everyone here is smart enough to
compute their own fuel consumption - you're the only one silly enough to claim
that the spec sheets say everything.



"JAXAshby" wrote in message
...
jeffies, I also showed a lying sack of squat engine dealer bragging about his
16 hp/gal engine, and another engine dealer bragging about 19 hp/Imp gal.

you wanna play el stew pee doh and go on believing that diesels get 30 or 40
or
50 hp per gallon of fuel (if you run the engine slow enough) go right ahead.
Kindly please do NOT bring an EPIRB along with you when you set off. That
would be unethical on your part. You would be endangering some young coastie
sent out to save your sorry stupid butt.

but, you really do have waaaaaaaaaaaaaaaaaaaaaaaay too much fuel onboard. you
know that. leave half of it to home.

No need to Google, You said "go to the specs", so just went to the specs from
the dominant supplier of diesels for recreational sailboats, and looked for
the
engine closest in size to what Donal might have. Actually, I was looking
for
the specs for my engines, but there weren't there. I even admitted there was
room for interpretation in the numbers, but you were too dense to notice
that.

You're the one who said "specific fuel consumption figures for brand new
engines
operating under laboratory conditions is about 16 hp for each gallon burned
per
hour." You then backed this up with an engine that had a SFC of 21
hp/gallons/hour. You picked the engine, not me. You picked the web site,
not
me.

Now you're just claiming the specs all lie. You're a real piece of work,
jaxie.




"JAXAshby" wrote in message
...
jeffies, the trouble in trying to discuss things with you is that you start
absolutely ignorant, google the hell out of the subject for a couple days,
getting important details 85* out of kilter, eventually start to feel
stupid
then blame me for your feelings.

Do keep in mind that *you* claimed early on the 30 hp per gallon was
normal,
and even right at the end you had to google through site after site to find
a
manufacturer with a rep for exagerating to pick a tiny difference from my
ordinary starting statement.















The funny thing is that there really is an upper limit to how much energy
can
be
taken out of a gallon of fuel, and his number of 16 is a reasonable number
for
an engine run at WOT. But to claim it as an absolute is ridiculous, since
most
engines at reduced throttle do better, and some do much better. Further,
claiming that cruisers always run at the full rated hp is absurd.

Its so typical of jaxie to take a simple "rule of thumb" and claim that
its
an
absolute that can never be violated.


"DSK" wrote in message
...
JAXAshby wrote:

modern, water-cooled, 4-cycle, brand spanking new diesel engines in
laboratory
conditions use about 1 gallon of fuel for each 16 hp produced.

Well, in this corner, all by himself, we have JAXAshby repeating "16 hp
per gph, 16 16 16" and then we have the rest of the world providing more
detailed and sensible explanations for a variety of differing figures.

Jax is right, of course... the whole rest of the world is wrong. We all
know that and agree, don't we? Of course we do, there there don't
worry...

I'm not sure why Jax enjoys being center man in this perpetual game of
kick-the-clown.

DSK

On a flat calm, I can do 74 miles on about 7.5 gallons.

Donal

meaning, if you are making 5 knots in calm water you will take 15 hours for the
trip, burning about 9 US gallons of fuel, for about 6/10ths of a gallon/hour
for about 9-1/2 hp.

That's about right.

Or making 6 knots, taking 12 hours and burning 9 US gallons, using about .75
gallons per hour for about 12 hp.

That's about right.

Or making 7.5 knots (rather fast for your size boat) taking 10 hours, burning 9
US gallons, using about .9 gallons/hour for about 15 hp.

Best bet is that you make the 74 miles in about 12 to 15 hours -- or maybe
longer -- in flat calm water.

Now ..... How long should it take me to cross the Channel?
Portsmouth - Cherbourg = 74 miles.


53 hours.

on a good day.

in other words, you are using about 12 hp.

"Jeff Morris" wrote in message
...
At what rpm, which engine, what speed, what's your hull speed?

2300, Volvo 30hp, 6 kts , 7.2 (I think)



Regards


Donal
--

jeffies, it is near impossible to discuss things with you, for you are so
ignorant you make mke errors 85* out of kilter and you have no capability to
understand just why you are wrong.

you are not even intelligent even to be considered a sophist. you are just
stupid.

so, leave your fuel at home, leave your EPIRB at home (it would be unethical of
you to own one, let alone take one with you on a boat, for merely having one
onboard means you might endanger the life of a young coastie trying to save
your sorry butt) AND GO TO SEA!! Let Darwin sort it out.

Time for the meds again, jaxie, reality is slipping away pretty fast!

Just to test you theory that I scoured the 'net in search of an engine that
didn't match your claim, I checked the Westerbeke site for the other diesel
I've
used, the 30B. At WOT it gets 17 hp/gal/hour, however, if you back off to
3000
rpm it goes up to 24 hp/gal/hour, and at 2500 rpm it goes up to 30
gal/hp/hour.
Even if you just look at propeller output instead of engine output, the
number
is well over the value of 16 you claimed.

As for my "mileage," this discussion started from various claims of actual
fuel
usage that you dismissed as silly. I think everyone here is smart enough to
compute their own fuel consumption - you're the only one silly enough to
claim
that the spec sheets say everything.



"JAXAshby" wrote in message
...
jeffies, I also showed a lying sack of squat engine dealer bragging about
his
16 hp/gal engine, and another engine dealer bragging about 19 hp/Imp gal.

you wanna play el stew pee doh and go on believing that diesels get 30 or
40
or
50 hp per gallon of fuel (if you run the engine slow enough) go right
ahead.
Kindly please do NOT bring an EPIRB along with you when you set off. That
would be unethical on your part. You would be endangering some young
coastie
sent out to save your sorry stupid butt.

but, you really do have waaaaaaaaaaaaaaaaaaaaaaaay too much fuel onboard.
you
know that. leave half of it to home.

No need to Google, You said "go to the specs", so just went to the specs
from
the dominant supplier of diesels for recreational sailboats, and looked
for
the
engine closest in size to what Donal might have. Actually, I was looking
for
the specs for my engines, but there weren't there. I even admitted there
was
room for interpretation in the numbers, but you were too dense to notice
that.

You're the one who said "specific fuel consumption figures for brand new
engines
operating under laboratory conditions is about 16 hp for each gallon
burned
per
hour." You then backed this up with an engine that had a SFC of 21
hp/gallons/hour. You picked the engine, not me. You picked the web site,
not
me.

Now you're just claiming the specs all lie. You're a real piece of work,
jaxie.




"JAXAshby" wrote in message
...
jeffies, the trouble in trying to discuss things with you is that you
start
absolutely ignorant, google the hell out of the subject for a couple
days,
getting important details 85* out of kilter, eventually start to feel
stupid
then blame me for your feelings.

Do keep in mind that *you* claimed early on the 30 hp per gallon was
normal,
and even right at the end you had to google through site after site to
find
a
manufacturer with a rep for exagerating to pick a tiny difference from
my
ordinary starting statement.















The funny thing is that there really is an upper limit to how much
energy
can
be
taken out of a gallon of fuel, and his number of 16 is a reasonable
number
for
an engine run at WOT. But to claim it as an absolute is ridiculous,
since
most
engines at reduced throttle do better, and some do much better.
Further,
claiming that cruisers always run at the full rated hp is absurd.

Its so typical of jaxie to take a simple "rule of thumb" and claim that
its
an
absolute that can never be violated.


"DSK" wrote in message
...
JAXAshby wrote:

modern, water-cooled, 4-cycle, brand spanking new diesel engines in
laboratory
conditions use about 1 gallon of fuel for each 16 hp produced.

Well, in this corner, all by himself, we have JAXAshby repeating "16
hp
per gph, 16 16 16" and then we have the rest of the world providing
more
detailed and sensible explanations for a variety of differing
figures.

Jax is right, of course... the whole rest of the world is wrong. We
all
know that and agree, don't we? Of course we do, there there don't
worry...

I'm not sure why Jax enjoys being center man in this perpetual game
of
kick-the-clown.

DSK

The why do you bother?



"JAXAshby" wrote in message
...
jeffies, it is near impossible to discuss things with you, for you are so
ignorant you make mke errors 85* out of kilter and you have no capability to
understand just why you are wrong.

you are not even intelligent even to be considered a sophist. you are just
stupid.

so, leave your fuel at home, leave your EPIRB at home (it would be unethical
of
you to own one, let alone take one with you on a boat, for merely having one
onboard means you might endanger the life of a young coastie trying to save
your sorry butt) AND GO TO SEA!! Let Darwin sort it out.

Time for the meds again, jaxie, reality is slipping away pretty fast!

Just to test you theory that I scoured the 'net in search of an engine that
didn't match your claim, I checked the Westerbeke site for the other diesel
I've
used, the 30B. At WOT it gets 17 hp/gal/hour, however, if you back off to
3000
rpm it goes up to 24 hp/gal/hour, and at 2500 rpm it goes up to 30
gal/hp/hour.
Even if you just look at propeller output instead of engine output, the
number
is well over the value of 16 you claimed.

As for my "mileage," this discussion started from various claims of actual
fuel
usage that you dismissed as silly. I think everyone here is smart enough to
compute their own fuel consumption - you're the only one silly enough to
claim
that the spec sheets say everything.



"JAXAshby" wrote in message
...
jeffies, I also showed a lying sack of squat engine dealer bragging about
his
16 hp/gal engine, and another engine dealer bragging about 19 hp/Imp gal.

you wanna play el stew pee doh and go on believing that diesels get 30 or
40
or
50 hp per gallon of fuel (if you run the engine slow enough) go right
ahead.
Kindly please do NOT bring an EPIRB along with you when you set off. That
would be unethical on your part. You would be endangering some young
coastie
sent out to save your sorry stupid butt.

but, you really do have waaaaaaaaaaaaaaaaaaaaaaaay too much fuel onboard.
you
know that. leave half of it to home.

No need to Google, You said "go to the specs", so just went to the specs
from
the dominant supplier of diesels for recreational sailboats, and looked
for
the
engine closest in size to what Donal might have. Actually, I was looking
for
the specs for my engines, but there weren't there. I even admitted there
was
room for interpretation in the numbers, but you were too dense to notice
that.

You're the one who said "specific fuel consumption figures for brand new
engines
operating under laboratory conditions is about 16 hp for each gallon
burned
per
hour." You then backed this up with an engine that had a SFC of 21
hp/gallons/hour. You picked the engine, not me. You picked the web site,
not
me.

Now you're just claiming the specs all lie. You're a real piece of work,
jaxie.




"JAXAshby" wrote in message
...
jeffies, the trouble in trying to discuss things with you is that you
start
absolutely ignorant, google the hell out of the subject for a couple
days,
getting important details 85* out of kilter, eventually start to feel
stupid
then blame me for your feelings.

Do keep in mind that *you* claimed early on the 30 hp per gallon was
normal,
and even right at the end you had to google through site after site to
find
a
manufacturer with a rep for exagerating to pick a tiny difference from
my
ordinary starting statement.















The funny thing is that there really is an upper limit to how much
energy
can
be
taken out of a gallon of fuel, and his number of 16 is a reasonable
number
for
an engine run at WOT. But to claim it as an absolute is ridiculous,
since
most
engines at reduced throttle do better, and some do much better.
Further,
claiming that cruisers always run at the full rated hp is absurd.

Its so typical of jaxie to take a simple "rule of thumb" and claim that
its
an
absolute that can never be violated.


"DSK" wrote in message
...
JAXAshby wrote:

modern, water-cooled, 4-cycle, brand spanking new diesel engines in
laboratory
conditions use about 1 gallon of fuel for each 16 hp produced.

Well, in this corner, all by himself, we have JAXAshby repeating "16
hp
per gph, 16 16 16" and then we have the rest of the world providing
more
detailed and sensible explanations for a variety of differing
figures.

Jax is right, of course... the whole rest of the world is wrong. We
all
know that and agree, don't we? Of course we do, there there don't
worry...

I'm not sure why Jax enjoys being center man in this perpetual game
of
kick-the-clown.

DSK

Jeff,
On my Univ 18 I go thru a 1x2 step-up transmission. I run very nicely at
2400, turning a 13x13 prop thru the 1x2 transmission AND I get 6 knt on
a Qt of fuel an hour. This is Measured and confirmed. No spec sheet no
calculation., a graduated 1/2 Gal bottle hooked to the engine inlet.

I done this because I didn't believe a engine could perform on that
amount of fuel. It certainly can!!

Ole Thom

(JAXAshby) wrote in message ...
joe, your Lister is producing 12 hp at 1800 rpm, or using 0.4 gal at the hp it
produces at 1800 rpm? Big difference, unless of course 1800 is max hp rpm for
your Lister.


Its a gen set and its set at 1800 rpm for the proper hertz, voltage ect..
stay at 1800 rpm with 1 lightbulb on or everything on. Still it averages 0.4 ph.




Jax is not to far off maybe 30% or so, but thats not to bad for a
Mensa genious. My lister 12 HP 2 cly diesel burns 0.4 gallons per hour
under load at constant 1800 RPM's. Thats 8 gallons every 20 hours.

Joe