PUMP vs. PROP
 

Lost In Space/Woodchuck wrote:
All depends what you want to do. My 21 footer with 300hp runs 95mph. Try
that with a jet boat drive.




What's the point of doing that? To see which d.f. incurs the most
serious spinal injury?

PUMP vs. PROP
 

On Thu, 5 Jul 2007 22:09:13 -0400, "Lost In Space/Woodchuck"
wrote:

All depends what you want to do. My 21 footer with 300hp runs 95mph. Try
that with a jet boat drive.

I don't know what type/model of boats they were, but two years ago the
Harbor Master in Lake Quinsigamond (Shrewsbury/Worcester, MA) arrested
two jet boat drivers clocked at 105 mph on radar.

If I remember correctly, the picture of the boats put them in the
18/20 foot category easily.

PUMP vs. PROP
 

Short Wave Sportfishing wrote:
On Thu, 5 Jul 2007 22:09:13 -0400, "Lost In Space/Woodchuck"
wrote:

All depends what you want to do. My 21 footer with 300hp runs 95mph. Try
that with a jet boat drive.

I don't know what type/model of boats they were, but two years ago the
Harbor Master in Lake Quinsigamond (Shrewsbury/Worcester, MA) arrested
two jet boat drivers clocked at 105 mph on radar.

If I remember correctly, the picture of the boats put them in the
18/20 foot category easily.


How did he catch 'em?

PUMP vs. PROP
 

On Fri, 06 Jul 2007 07:14:47 -0400, HK wrote:

Short Wave Sportfishing wrote:
On Thu, 5 Jul 2007 22:09:13 -0400, "Lost In Space/Woodchuck"
wrote:

All depends what you want to do. My 21 footer with 300hp runs 95mph. Try
that with a jet boat drive.

I don't know what type/model of boats they were, but two years ago the
Harbor Master in Lake Quinsigamond (Shrewsbury/Worcester, MA) arrested
two jet boat drivers clocked at 105 mph on radar.

If I remember correctly, the picture of the boats put them in the
18/20 foot category easily.

How did he catch 'em?

Wasn't hard. While Qinsig is 4 miles long, it's only 150 yards wide
at it's widest point - there are only two launch ramps, one is
inaccessible to boats of this type and the other is at the far end of
the lake towards I-290.

http://tinyurl.com/28jxb2

PUMP vs. PROP
 

Short Wave Sportfishing wrote:
On Fri, 06 Jul 2007 07:14:47 -0400, HK wrote:

Short Wave Sportfishing wrote:
On Thu, 5 Jul 2007 22:09:13 -0400, "Lost In Space/Woodchuck"
wrote:

All depends what you want to do. My 21 footer with 300hp runs 95mph. Try
that with a jet boat drive.
I don't know what type/model of boats they were, but two years ago the
Harbor Master in Lake Quinsigamond (Shrewsbury/Worcester, MA) arrested
two jet boat drivers clocked at 105 mph on radar.

If I remember correctly, the picture of the boats put them in the
18/20 foot category easily.
How did he catch 'em?

Wasn't hard. While Qinsig is 4 miles long, it's only 150 yards wide
at it's widest point - there are only two launch ramps, one is
inaccessible to boats of this type and the other is at the far end of
the lake towards I-290.

http://tinyurl.com/28jxb2


Awfully fast for a little lake.
My first boating memory is watching my father race his "utility" hydro
on Lake Zoar in Connecticut, a fairly small lake, though larger than
four miles long, and on the river just below the dam there. I think it
was called the Indian River or Indian something or other. Anyway, there
was another first that day. Afterwards everyone went to some Italian
joint on the lake and I had my first slice of pizza. Wow.

I was five or six at the time.

PUMP vs. PROP
 

"HK" wrote in message
...

Awfully fast for a little lake.
My first boating memory is watching my father race his "utility" hydro
on Lake Zoar in Connecticut, a fairly small lake, though larger than four
miles long, and on the river just below the dam there. I think it was
called the Indian River or Indian something or other. Anyway, there was
another first that day. Afterwards everyone went to some Italian joint on
the lake and I had my first slice of pizza. Wow.

I was five or six at the time.


Otta be a law against those overpowered motorboats.... they tend to bring
out the worse in the yahoo faction.
http://www.thechronicleherald.ca/Front/845681.html

PUMP vs. PROP
 

Don White wrote:
"HK" wrote in message
...
Awfully fast for a little lake.
My first boating memory is watching my father race his "utility" hydro
on Lake Zoar in Connecticut, a fairly small lake, though larger than four
miles long, and on the river just below the dam there. I think it was
called the Indian River or Indian something or other. Anyway, there was
another first that day. Afterwards everyone went to some Italian joint on
the lake and I had my first slice of pizza. Wow.

I was five or six at the time.


Otta be a law against those overpowered motorboats.... they tend to bring
out the worse in the yahoo faction.
http://www.thechronicleherald.ca/Front/845681.html



Every so often I see one of those overpowered penis boats go by at about
80 mph on Chesapeake Bay, and of course you always hear them, too. I
wonder if they ever find those waterlogged timbers that occasionally
plague the bay?

PUMP vs. PROP
 

On Jul 5, 2:45 am, "Steven Vaughan" wrote:
Now, I would like to find this all out for myself, BUT, you cant
really go down to your local boat dealer, show you drivers license and
take a couple boats for a spin. At least not at the dealers that I
know of.

Does anyone have some light to shine on this subject? Any
experiances? They would be much appreciated.

Thanks,

Justin Van Dyken

The rule of thumb for the small-river-jet-boaters in my neck of the woods is
that switching from prop to jet setup equals a 50% reduction in real HP at
the business end. This is probably why you see (used to see?) lots of
2-stroke jet boats- higher power-to-weight ratio. This is probably also why
jet boats suck twice as much gas as prop boats.

See I have not heard that it was a 50 percent loss......but I have
heard of a 70 percent loss in HP

PUMP vs. PROP
 

On Fri, 06 Jul 2007 08:37:00 -0400, HK wrote:

Don White wrote:
"HK" wrote in message
...
Awfully fast for a little lake.
My first boating memory is watching my father race his "utility" hydro
on Lake Zoar in Connecticut, a fairly small lake, though larger than four
miles long, and on the river just below the dam there. I think it was
called the Indian River or Indian something or other. Anyway, there was
another first that day. Afterwards everyone went to some Italian joint on
the lake and I had my first slice of pizza. Wow.

I was five or six at the time.


Otta be a law against those overpowered motorboats.... they tend to bring
out the worse in the yahoo faction.
http://www.thechronicleherald.ca/Front/845681.html



Every so often I see one of those overpowered penis boats go by at about
80 mph on Chesapeake Bay, and of course you always hear them, too. I
wonder if they ever find those waterlogged timbers that occasionally
plague the bay?

I think most of us who see them report the logs to the Coast Guard as
hazards.
--
John H

PUMP vs. PROP
 

On Jul 8, 7:00 pm, John H. wrote:
On Fri, 06 Jul 2007 08:37:00 -0400, HK wrote:
Don White wrote:
"HK" wrote in message
...
Awfully fast for a little lake.
My first boating memory is watching my father race his "utility" hydro
on Lake Zoar in Connecticut, a fairly small lake, though larger than four
miles long, and on the river just below the dam there. I think it was
called the Indian River or Indian something or other. Anyway, there was
another first that day. Afterwards everyone went to some Italian joint on
the lake and I had my first slice of pizza. Wow.

I was five or six at the time.

Otta be a law against those overpowered motorboats.... they tend to bring
out the worse in the yahoo faction.
http://www.thechronicleherald.ca/Front/845681.html

Every so often I see one of those overpowered penis boats go by at about
80 mph on Chesapeake Bay, and of course you always hear them, too. I
wonder if they ever find those waterlogged timbers that occasionally
plague the bay?

I think most of us who see them report the logs to the Coast Guard as
hazards.
--
John H- Hide quoted text -

- Show quoted text -

Justin Van Dyken wrote:

I recently had a conversation with a boat machanic who told me that
the loss in HP on a jet pump is already factored into the boat. For
example: A jet boat has a HP rating of 100. Now, take that same
engine, and put it into a prop boat, and the HP would be like 130.
So in other words what you see is what you get. But you do lose
efficiency from a pump.

Justin Van Dyken