Re: [bolger] Re: Interesting Stern Drive
The price turned me off for what you are getting. It's way simpler in
moving parts compared to a stern drive for the same cost. I believe that
it could make serious inroads into the Mercruiser market if they dropped
the price and went for volume. If they marketed as a package with an
engine and/or teamed up with a boat manufacturer and used the simpler
design to give them a price edge I think they would really sell.
HJ
Hugo Tyson wrote:
moving parts compared to a stern drive for the same cost. I believe that
it could make serious inroads into the Mercruiser market if they dropped
the price and went for volume. If they marketed as a package with an
engine and/or teamed up with a boat manufacturer and used the simpler
design to give them a price edge I think they would really sell.
HJ
Hugo Tyson wrote:
>Those Dbd stern drives seem like a good idea for certain applications.
> I inquired about them last year from the manufacturer and was sent a brochure which didn't really tell me anymore than what was on their website, it did tell me the price, $7500.ooc (AuD) which is about $5400 (UsD).
>
>Hugo Tyson, Launceston, Tasmania, Australia.
>
>donschultz8275 <donschultz@...> wrote:
>
>--- Inbolger@yahoogroups.com, "Roger Derby" <derbyrm@s...> wrote:
>
>
>
>>I was wondering if lateral hydraulic cylinders could be added to
>>
>>
>provide
>
>
>>steering at speed. Then the rudder could be gotten out of the way
>>
>>
>and drag
>
>
>>reduced.
>>
>>Roger
>>
>>
>
>
>Actually ALL steering is done with the outdrive. the link the passes
>thru the transom above the drive shaft rotates providing steering.
>The cylinder controls drive depth.
>
>
>
>
>
>Bolger rules!!!
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>- no cursing, flaming, trolling, spamming, or flogging dead horses
>- stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
>- Pls add your comments at the TOP, SIGN your posts, and snip away
>- Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
>- Unsubscribe:bolger-unsubscribe@yahoogroups.com
>- Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
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Those Dbd stern drives seem like a good idea for certain applications.
I inquired about them last year from the manufacturer and was sent a brochure which didn't really tell me anymore than what was on their website, it did tell me the price, $7500.ooc (AuD) which is about $5400 (UsD).
Hugo Tyson, Launceston, Tasmania, Australia.
donschultz8275 <donschultz@...> wrote:
I inquired about them last year from the manufacturer and was sent a brochure which didn't really tell me anymore than what was on their website, it did tell me the price, $7500.ooc (AuD) which is about $5400 (UsD).
Hugo Tyson, Launceston, Tasmania, Australia.
donschultz8275 <donschultz@...> wrote:
--- Inbolger@yahoogroups.com, "Roger Derby" <derbyrm@s...> wrote:
> I was wondering if lateral hydraulic cylinders could be added to
provide
> steering at speed. Then the rudder could be gotten out of the way
and drag
> reduced.
>
> Roger
Actually ALL steering is done with the outdrive. the link the passes
thru the transom above the drive shaft rotates providing steering.
The cylinder controls drive depth.
Bolger rules!!!
- no cursing, flaming, trolling, spamming, or flogging dead horses
- stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
- Pls add your comments at the TOP, SIGN your posts, and snip away
- Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
- Unsubscribe:bolger-unsubscribe@yahoogroups.com
- Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
Yahoo! Groups SponsorADVERTISEMENT
---------------------------------
Yahoo! Groups Links
To visit your group on the web, go to:
http://groups.yahoo.com/group/bolger/
To unsubscribe from this group, send an email to:
bolger-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
---------------------------------
Find local movie times and trailers on Yahoo! Movies.
[Non-text portions of this message have been removed]
--- Inbolger@yahoogroups.com, "Roger Derby" <derbyrm@s...> wrote:
thru the transom above the drive shaft rotates providing steering.
The cylinder controls drive depth.
> I was wondering if lateral hydraulic cylinders could be added toprovide
> steering at speed. Then the rudder could be gotten out of the wayand drag
> reduced.Actually ALL steering is done with the outdrive. the link the passes
>
> Roger
thru the transom above the drive shaft rotates providing steering.
The cylinder controls drive depth.
Also on a Sneakeasy or Wyoming. You wouldn't lose the shallow draft
capability.
HJ
donschultz8275 wrote:
capability.
HJ
donschultz8275 wrote:
>Has anyone looked at these? They're not inexpensive at all but they
>have a simplicity and uniqueness that may appeal to those who
>appreciate Bolger power designs.
>
>Certainly very efficent, with lower losses through the CVs than the
>gear sets.
>
>http://www.dbdmarine.com/specs/index.htm
>
>I've explored jet pumps and concluded they don't do anything I want in
>a boat well enough to pick one as part of the power train. I think
>one of these hanging off the back of Wolfpack would work very well.
>
>
>
>
>
>
>Bolger rules!!!
>- no cursing, flaming, trolling, spamming, or flogging dead horses
>- stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
>- Pls add your comments at the TOP, SIGN your posts, and snip away
>- Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
>- Unsubscribe:bolger-unsubscribe@yahoogroups.com
>- Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
>Yahoo! Groups Links
>
>
>
>
>
>
>
>.
>
>
>
Yes, I was wondering about that -- a bit like the way the intake of a
jet drive works.
There is a theoretical (and maybe actual) benefit to this kind of
arrangement: the prop (impeller?) is free to throw water aft of the
boat above the surface of the water. Just like the recoil of a gun,
the boat is pushed in the opposite direction.
At least that's what the proponents of jet drives say. But it seems
to me an ordinary submerged prop uses the same Newtonian physical
law: the prop's push against the water is balanced by an equal push
by the water against the prop.
Howard
-- once again getting way over his head into theory he doesn't fully
understand.
jet drive works.
There is a theoretical (and maybe actual) benefit to this kind of
arrangement: the prop (impeller?) is free to throw water aft of the
boat above the surface of the water. Just like the recoil of a gun,
the boat is pushed in the opposite direction.
At least that's what the proponents of jet drives say. But it seems
to me an ordinary submerged prop uses the same Newtonian physical
law: the prop's push against the water is balanced by an equal push
by the water against the prop.
Howard
-- once again getting way over his head into theory he doesn't fully
understand.
--- Inbolger@yahoogroups.com, "Roger Derby" <derbyrm@s...> wrote:
> Is it possible that the plate above the prop produces a Coanda
effect that
> sucks water from below to fully immerse the prop?
Is it possible that the plate above the prop produces a Coanda effect that
sucks water from below to fully immerse the prop?
I was wondering if lateral hydraulic cylinders could be added to provide
steering at speed. Then the rudder could be gotten out of the way and drag
reduced.
Roger
derbyrm@...
http://derbyrm.mystarband.net/default.htm
sucks water from below to fully immerse the prop?
I was wondering if lateral hydraulic cylinders could be added to provide
steering at speed. Then the rudder could be gotten out of the way and drag
reduced.
Roger
derbyrm@...
http://derbyrm.mystarband.net/default.htm
----- Original Message -----
From: "Howard Stephenson" <stephensonhw@...>
> Intriguing. At first I thought it was designed for a surface-piercing
> prop; in fact the manufacturer's warranty is voided if a s-p prop is
> ued. So how does it work? Only about half the prop is in a clear
> stream of water below the bottom of the hull.
>
> Howard
>
> --- Inbolger@yahoogroups.com, "donschultz8275" <donschultz@i...>
> wrote:
>>
>> Has anyone looked at these? They're not inexpensive at all but they
>> have a simplicity and uniqueness that may appeal to those who
>> appreciate Bolger power designs.
>>
>> Certainly very efficent, with lower losses through the CVs than the
>> gear sets.
>>
>>http://www.dbdmarine.com/specs/index.htm
>
>
>
>
>
>
>
> Bolger rules!!!
> - no cursing, flaming, trolling, spamming, or flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
> - Pls add your comments at the TOP, SIGN your posts, and snip away
> - Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax:
> (978) 282-1349
> - Unsubscribe:bolger-unsubscribe@yahoogroups.com
> - Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
--- Inbolger@yahoogroups.com, "Howard Stephenson" <stephensonhw@a...>
wrote:
depth relative to the hull. I've seen pics of an AF4 with the OB
motor mounted on a steel tubing mount way aft the stern and set very high.
wrote:
>I think having the prop far enough astern prevents problems with its
> Intriguing. At first I thought it was designed for a surface-piercing
> prop; in fact the manufacturer's warranty is voided if a s-p prop is
> ued. So how does it work? Only about half the prop is in a clear
> stream of water below the bottom of the hull.
>
> Howard
>
depth relative to the hull. I've seen pics of an AF4 with the OB
motor mounted on a steel tubing mount way aft the stern and set very high.
Intriguing. At first I thought it was designed for a surface-piercing
prop; in fact the manufacturer's warranty is voided if a s-p prop is
ued. So how does it work? Only about half the prop is in a clear
stream of water below the bottom of the hull.
Howard
--- Inbolger@yahoogroups.com, "donschultz8275" <donschultz@i...>
wrote:
prop; in fact the manufacturer's warranty is voided if a s-p prop is
ued. So how does it work? Only about half the prop is in a clear
stream of water below the bottom of the hull.
Howard
--- Inbolger@yahoogroups.com, "donschultz8275" <donschultz@i...>
wrote:
>
> Has anyone looked at these? They're not inexpensive at all but they
> have a simplicity and uniqueness that may appeal to those who
> appreciate Bolger power designs.
>
> Certainly very efficent, with lower losses through the CVs than the
> gear sets.
>
>http://www.dbdmarine.com/specs/index.htm
Has anyone looked at these? They're not inexpensive at all but they
have a simplicity and uniqueness that may appeal to those who
appreciate Bolger power designs.
Certainly very efficent, with lower losses through the CVs than the
gear sets.
http://www.dbdmarine.com/specs/index.htm
I've explored jet pumps and concluded they don't do anything I want in
a boat well enough to pick one as part of the power train. I think
one of these hanging off the back of Wolfpack would work very well.
have a simplicity and uniqueness that may appeal to those who
appreciate Bolger power designs.
Certainly very efficent, with lower losses through the CVs than the
gear sets.
http://www.dbdmarine.com/specs/index.htm
I've explored jet pumps and concluded they don't do anything I want in
a boat well enough to pick one as part of the power train. I think
one of these hanging off the back of Wolfpack would work very well.