Suggestions for a quiet PWC?
Ryan Lackey
I'm interested in buying a PWC (sit-down or jet boat) for going back
and forth through 10nm or so of 1-3m waves.
One of the features I'd like would be something which is as quiet
as possible. I'd be willing to invest in aftermarket modifications/etc.
to accomplish this, but I'd like to know which models/manufacturers
are the quietest to begin with.
Thanks!
--
Ryan Lackey
r...@mit.edu
http://sof.mit.edu/rdl/
Tim Weinert
The 1998 Sea-Doo GTX RFI(Rotax Fuel Injection) is by far the quietest PWC on
the market. To top that off, it is the first ever fuel injected production
model personal watercraft.
Ryan Lackey wrote in message <6lk1k2$3...@senator-bedfellow.MIT.EDU>...
Groupklemm
Ryan,
We have conducted sound level tests on numerous pwcs (and traditional big
boats). The 1998 batch of pwcs are the quietest marine crafts that money can
buy.
If you are interested in the quiet-est of the quiet ... get the Sea Doo RFI
785. This machine is the new maritime standard of "low sound level".
If you long for open class power with your "quietness" ... the Kawasaki STX
1100 (meeting 1998 emission standards), Sea Doo GTXL 950, and Yamaha XL 1100
are all "quiet giants".
Regards, Group K
><HTML>Subject: Suggestions for a quiet PWC?<BR>
>From: r...@mit.edu (Ryan Lackey)<BR>
>Date: 6/9/98 12:15 PM US Mountain Standard Time<BR>
>Message-id: <6lk1k2$3...@senator-bedfellow.MIT.EDU><BR>
><BR>
><FONT SIZE=3 PTSIZE=10>I'm interested in buying a PWC (sit-down or jet boat)
>for going back<BR>
>and forth through 10nm or so of 1-3m waves.<BR>
><BR>
>One of the features I'd like would be something which is as quiet<BR>
>as possible. I'd be willing to invest in aftermarket modifications/etc.<BR>
>to accomplish this, but I'd like to know which models/manufacturers<BR>
>are the quietest to begin with.<BR>
><BR>
>Thanks!<BR>
>--<BR>
>Ryan Lackey<BR>
>r...@mit.edu<BR>
>http://sof.mit.edu/rdl/
Tim W Carbone
Can you say Sea-Doo RFI?
Ryan Lackey wrote:
> I'm interested in buying a PWC (sit-down or jet boat) for going back
> and forth through 10nm or so of 1-3m waves.
>
> One of the features I'd like would be something which is as quiet
> as possible. I'd be willing to invest in aftermarket modifications/etc.
> to accomplish this, but I'd like to know which models/manufacturers
> are the quietest to begin with.
>
W.S. O'Neal
The Sea Doo GTX RFI is the quietest PWC ever made and it will handle big
water too.
Bill O'Neal
WCM
--
Bill @ E-MAIL: Water...@worldnet.att.net
Larry KN4IM wrote in message <357deff8...@news.mindspring.com>...
>THREE METER WAVES!? I hope not...
>
>Larry....9 ft seas....Wow....
Larry KN4IM
Todd M
I find the noisey part of pwc is when they jump out of the water. The
prop makes twice as much noise as the engine does. Just trim that 150
hp outboard out of the water. Nuff said. Its not the engine, its the
constant leaping out of the water.
Todd M
Harry Krause
Todd M wrote:
>
> I find the noisey part of pwc is when they jump out of the water. The
> prop makes twice as much noise as the engine does. Just trim that 150
> hp outboard out of the water. Nuff said. Its not the engine, its the
> constant leaping out of the water.
>
> Todd M
>
I agree. It's also the ratcheting up and down of the throttle that also is most
annoying.
I try very hard NOT to trim our outboard so that the prop is out of the water,
except when idling though a shoal area.
Gordon R. Kennedy
Ryan Lackey (r...@mit.edu) wrote:
: I'm interested in buying a PWC (sit-down or jet boat) for going back
: and forth through 10nm or so of 1-3m waves.
: One of the features I'd like would be something which is as quiet
: as possible. I'd be willing to invest in aftermarket modifications/etc.
: to accomplish this, but I'd like to know which models/manufacturers
are the quietest to begin with.
I have had my 1998 Sea Doo GTX-RFI for just over three weeks now, and
am incredibly pleased with it's "stealthiness". I've been riding since
1990, and believe me, this machine is more than just quiet! At
moderate speed (say 30 mph on the dream-o-meter), about all I hear
is the wind in my face and the splashing of water. There, of course,
must be some exhaust noise ... but at a much lower level than either
the wind or water. At "putting speed" (up to about 2,000 rpm), there
is no noticeable intake/exhaust sound.
The RFI (Rotax Fuel Injection) is AFAIK the industry's first production
Fuel-Injected PWC ... fuel economy seems to be much better than my
previous SeaDoos.
Try to test ride one, I suspect your search will end right there.
Hope this is of some help.
Todd M
I disagree. When on plane, the exhaust outlet is always out of the
water.
Todd M
On Wed, 10 Jun 1998 16:34:22 GMT, ea...@CHANGE-EDU-TO-COMgeocities.edu
(E) wrote:
>In article <357e7527.404522@news>, uka...@athenet.net wrote:
>>
>>I find the noisey part of pwc is when they jump out of the water. The
>>prop makes twice as much noise as the engine does. Just trim that 150
>>hp outboard out of the water. Nuff said. Its not the engine, its the
>>constant leaping out of the water.
>>
>Ummm.....the prop doesn't make any noise. The noise you hear when a PWC
>leaves the water is the exhaust....the engine.
>
>--
>Eric
>(Remove CHANGE_EDU_TO_COM and do what it says when sending me mail.)
typhoon
Harry Krause wrote:
>
>
> I agree. It's also the ratcheting up and down of the throttle that also is most
> annoying.
>
So called "ratcheting" of the throttle is a technique used to better control the
enertia of the boat, it'll always be used.
If the craft is quieter, you won't notice it so much.
Larry
On Wed, 10 Jun 1998 19:41:29 GMT, ea...@CHANGE-EDU-TO-COMgeocities.edu
(E) wrote:
>In article <6lkugl$3...@bgtnsc03.worldnet.att.net>, "W.S. O'Neal" <Water...@worldnet.att.net> wrote:
>>The Sea Doo GTX RFI is the quietest PWC ever made and it will handle big
>>water too.
>>
>
>I saw the RFI two days ago finally and I must say I was extremely unimpressed.
>It looks no more spectacular than an MRI FI system. I was expecting some
>technology breakthru with the way they've touted it. I fail to see how it's
>any sort of a leap in cleaner emissions for PWC, and (as Larry has commented)
>I don't expect it to be around in this configuration for more than a model
>year or two.
>
>The reduced noise is great though, hope Bombardier equips all its 1999 model
>year craft with it. Especially that 1999 SPX-Limited. ;-)
>
If you didn't pull out the rear storage bucket and look at the plastic
resonator pipes on the starboard sidewall, go back and take a look!
It has tuned resonators that cancel out frequencies, several of them,
built into a plastic exhaust pipe BEHIND the waterbox. These,
gentlemen, are ORGAN PIPES, actually closed flute pipes, a technology
that dates back into the BC era of the water tuned blowpipes. The
sound injected into these closed pipes, which are rather widebanded,
is reflected back where it came from in such a way that it arrives
out-of-phase with the sound that produced it. The effect is a
cancellation in sound, over a wide range from the multiple resonators
of different lengths, back in the final exhaust. Dealer told me he
was informed all PWC SeaDoo makes will have this technology to silence
the bees buzzing in future boats.
Now, have a little fun with your dealer.....
Take out the front storage bucket and look at the injection computer
on the port side, a water-resistant box. Ask your dealer to go look
up what it's going to cost you, out of warranty next year, to replace
this injection computer thingy....Watch the expression on his
face...heh.....heh.....heh...(c;
There's a hose that comes from under the back of the engine up the
front and is metal hose-clamped to a black plastic 90 degree fitting
on the engine. Ask him how much that hose is gonna cost to replace
when it's cracked. We couldn't find the other end without removing
the engine...geez! Awful lot of "stuff" way down inside there and
impossible to get TO!
Lotsa plusses on this boat. I loved the 4 tiedown places, 2 on either
side of the passenger's seat, so you can bungee stuff to it...er, ah,
including your passenger! Nice ski hook in back. We took a hard look
at the new flip-down boarding step. We decided it was heavy enough,
in spite of its VERY WIDE stance...except for the pin under the step
that limits it's DOWN position. The boardee has a terrible mechanical
advantage over this pin because the pin is very close to the hinge.
Dealer told me some of his 300# customers, the ones who will buy the
SeaDoo Catera GTX, will bust that pin in half before the summer's
over. It isn't replaceable, pressed in. We wondered aloud why they
didn't use a boarding step like the one on the big Kawasaki next to
it...much narrower and goes down into the water farther.
All in all, a nice looking boat. Wonder who'll have parts in 2003 to
fix it when SeaDoo is all Ficht injected and has forgotten this boat
from its corporate (and parts department) memory??
Larry
