Re: micro navigator

Peter,the Navigator also has only 3 battens, each with a sheet as
you describe.
Alert now has a full chinese junk rig. The owner is quite elderly,
and has probably traded some efficiency for ultimate ease of sail
handling.
I will know early next year how true your comments about leaping
coils of lines are. My worst nightmare is being discovered in some
lonely bay, halfway up the rig, like a trussed dessicated starfish;
rather like the seagull I found in the netting over my tri a decade
ago.
DonB

--- In bolger@y..., "pvanderwaart" <pvanderw@o...> wrote:
> > I seem to recall
> > reading somewhere comments from Bolger(?) that despite what
looked
> > workable on paper for ALERT has in reality not dished up the
> > advantages once hoped for.
>
> I flatly state that I don't know if PB&F would agree with the
above,
> but it is clear that the thinking has progressed somewhat. The
> original Alert rig had, as I remember, a full panoply of
> interconneted Chinese sheetlets but the Fiji rig, just published
has
> a direct sheet to each batten. The number of battens may be
reduced
> as well. As I understand the writeups, the effect being aimed for
was
> the easy reefing of the Chinese rig with a Western sail shape.
>
> Personally, as much as I admire the thinking, I would stay away
from
> this rig. Neat coils of line leap into knots at my approach, and I
> don't see that multiplying the yards of line in and about the
cockpit
> would be a good thing for me. The jib-headed boom sprit rig with a
> single, single-part sheet is the match for my temperment.
>
> Peter
http://www.boatdesign.com/micro/files/navigator1.pdf
----- Original Message -----
From: "brucehallman" <brucehallman@...>
To: <bolger@yahoogroups.com>
Sent: Monday, November 04, 2002 12:54 PM
Subject: [bolger] Re: micro navigator


> --- "pvanderwaart" <pvanderw@o...> wrote:
> > As I understand the writeups,
> > the effect being aimed for was
> > the easy reefing of the Chinese
> > rig with a Western sail shape.
>
> An OCR scan of the Micro Navigator
> PB&F 'write up' is pasted at the
> bottom of this message.
>
> > Personally, as much as I admire
> > the thinking, I would stay away from
> > this rig.
>
> For the Navigator at least
> (because overall project is small
> enough) my attitude is
> to try it and see!
>
> ==== scan of PB&F 'write up' follows ====
> The reason for this change is your safety at sea, combined with the
> long-overdue need for more sail-area. MICRO, the NAVIGATOR, would
> thus become a CHINESE GAFF CAT YAWL. With the best attributes of the
> western gaff-rig and the eastern Junk rig combined, this geometry
> controls each others' well-known vices, allows more sail-area (here
> up to 203 ft2 total) which still can be reefed rapidly from within
> the `house', while using existing structural geometric relationships
> between masts-placement, rudder and keel. We've sailed the 525 ft2
> prototype-rig this fall and so far so good in terms of utility,
> safety, and convenience. And we've drawn the geometry for single
> sails in sizes ranging from this proposal to about 1100 ft2. The
> prototype proved that the geometry can be raised and lowered, reefed
> and unfurled again while remaining `on course' using the sheets,
> lazyjacks and the reeflines. On the MICRO NAVIGATOR all halyards,
> sheets, ands reeflines would run from left and right of the mast up
> aft under the housetop overhang for a reasonably dry entry via
> fairleads into the house and to cleats/ clutches on the underside of
> that top. Standing in the companionway or sitting inside, her light
> sail and moving spars can be manipulated from amidships, without
> shifting trim dramatically or opening her bow-hatch.
>
> The new rig geometry would have main (4"dia) and mizzenmasts (3"dia),
> that are unpainted stock industrial untapered aluminum pipe, as is
> the boom (2 1/2"), while the purely arbitrarily bent gaff could
> either be a bent tube (2 1/2") or a wood-lamination. There are no
> lacings of sail-cloth to the mainmast or tracks. Rather, gaff-jaws
> cut of of 1 1/2-2" plywood are connected to each other by bolts
> through the sailcoth (!) and the battens/ boom/gaff, allowing the
> cloth and battens to rotate freely around the mast controlled on the
> mast by pands on each jaw and on the other end by spans between two
> battens/spars linked to one sheet each.
> We show three (short) sheets to control the twist - eliminating it -
> of the mainsail along its trailing edge up, by sheeting only two
> battens/spars per sheet; the stresses per sheet are thus marginal.
> Thus you can produce a good shape without high-tension rigging and
> fancy hardware - not that NAVIGATOR's size would eat up much of that
> either. The boomvang shown has just the function to keep the boom
> from rising under the pull of the lower span. Use plans and boat to
> measure ropage through 180 deg arc!
> Without the risk of the `death-roll' from twist-generated
> oscillation of a gaffer down-wind, or the efficiency losses beating
> and reaching from a sagging gaff, not to mention the `plate-shape'
> losses of the Junk rig, MICRO NAVIGATOR could thus run with sail-
> areas as desired on whatever course is geometrically possible,
> without traditional gaff-hazards, and the bad aerodynamics of the
> junk rig.
> The issue remaining on each version of this geometry is the
> relative stiffness of the battens along their length, as none can be
> alike in stiffness and all have to work together to produce a
> reasonable sail- shape - i.e. some draft forward and flatter near the
> trailing edge. With NAVIGATOR's proposed 176ft2 main and shortish
> smallish battens that task would not be overwhelming. Starting out
> with too much stiffness, you'd observe the cloth's shape under
> various conditions, to then unbolt and pull the battens, and taking
> the planer/belt-sander to each batten in respective
> locations `softening' it where it needs it; errors in removal could
> be corrected by adding a layer of glasstape or put back strips of
> veneer.
> For `the long trip', we these attributes are most promising in
> performance and safety - more sail area on demand, still a shorter
> mast reefed in a blow, and none of that sprawling across her raised
> deck...
>
> =====
>
>
>
> Bolger rules!!!
> - no cursing, flaming, trolling, spamming, or flogging dead horses
> - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
> - add your comments at the TOP and SIGN your posts and <snip> away
> - To order 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
>
> Your use of Yahoo! Groups is subject tohttp://docs.yahoo.com/info/terms/
>
>
--- "pvanderwaart" <pvanderw@o...> wrote:
> As I understand the writeups,
> the effect being aimed for was
> the easy reefing of the Chinese
> rig with a Western sail shape.

An OCR scan of the Micro Navigator
PB&F 'write up' is pasted at the
bottom of this message.

> Personally, as much as I admire
> the thinking, I would stay away from
> this rig.

For the Navigator at least
(because overall project is small
enough) my attitude is
to try it and see!

==== scan of PB&F 'write up' follows ====
The reason for this change is your safety at sea, combined with the
long-overdue need for more sail-area. MICRO, the NAVIGATOR, would
thus become a CHINESE GAFF CAT YAWL. With the best attributes of the
western gaff-rig and the eastern Junk rig combined, this geometry
controls each others' well-known vices, allows more sail-area (here
up to 203 ft2 total) which still can be reefed rapidly from within
the `house', while using existing structural geometric relationships
between masts-placement, rudder and keel. We've sailed the 525 ft2
prototype-rig this fall and so far so good in terms of utility,
safety, and convenience. And we've drawn the geometry for single
sails in sizes ranging from this proposal to about 1100 ft2. The
prototype proved that the geometry can be raised and lowered, reefed
and unfurled again while remaining `on course' using the sheets,
lazyjacks and the reeflines. On the MICRO NAVIGATOR all halyards,
sheets, ands reeflines would run from left and right of the mast up
aft under the housetop overhang for a reasonably dry entry via
fairleads into the house and to cleats/ clutches on the underside of
that top. Standing in the companionway or sitting inside, her light
sail and moving spars can be manipulated from amidships, without
shifting trim dramatically or opening her bow-hatch.

The new rig geometry would have main (4"dia) and mizzenmasts (3"dia),
that are unpainted stock industrial untapered aluminum pipe, as is
the boom (2 1/2"), while the purely arbitrarily bent gaff could
either be a bent tube (2 1/2") or a wood-lamination. There are no
lacings of sail-cloth to the mainmast or tracks. Rather, gaff-jaws
cut of of 1 1/2-2" plywood are connected to each other by bolts
through the sailcoth (!) and the battens/ boom/gaff, allowing the
cloth and battens to rotate freely around the mast controlled on the
mast by pands on each jaw and on the other end by spans between two
battens/spars linked to one sheet each.
We show three (short) sheets to control the twist - eliminating it -
of the mainsail along its trailing edge up, by sheeting only two
battens/spars per sheet; the stresses per sheet are thus marginal.
Thus you can produce a good shape without high-tension rigging and
fancy hardware - not that NAVIGATOR's size would eat up much of that
either. The boomvang shown has just the function to keep the boom
from rising under the pull of the lower span. Use plans and boat to
measure ropage through 180 deg arc!
Without the risk of the `death-roll' from twist-generated
oscillation of a gaffer down-wind, or the efficiency losses beating
and reaching from a sagging gaff, not to mention the `plate-shape'
losses of the Junk rig, MICRO NAVIGATOR could thus run with sail-
areas as desired on whatever course is geometrically possible,
without traditional gaff-hazards, and the bad aerodynamics of the
junk rig.
The issue remaining on each version of this geometry is the
relative stiffness of the battens along their length, as none can be
alike in stiffness and all have to work together to produce a
reasonable sail- shape - i.e. some draft forward and flatter near the
trailing edge. With NAVIGATOR's proposed 176ft2 main and shortish
smallish battens that task would not be overwhelming. Starting out
with too much stiffness, you'd observe the cloth's shape under
various conditions, to then unbolt and pull the battens, and taking
the planer/belt-sander to each batten in respective
locations `softening' it where it needs it; errors in removal could
be corrected by adding a layer of glasstape or put back strips of
veneer.
For `the long trip', we these attributes are most promising in
performance and safety - more sail area on demand, still a shorter
mast reefed in a blow, and none of that sprawling across her raised
deck...

=====
> I seem to recall
> reading somewhere comments from Bolger(?) that despite what looked
> workable on paper for ALERT has in reality not dished up the
> advantages once hoped for.

I flatly state that I don't know if PB&F would agree with the above,
but it is clear that the thinking has progressed somewhat. The
original Alert rig had, as I remember, a full panoply of
interconneted Chinese sheetlets but the Fiji rig, just published has
a direct sheet to each batten. The number of battens may be reduced
as well. As I understand the writeups, the effect being aimed for was
the easy reefing of the Chinese rig with a Western sail shape.

Personally, as much as I admire the thinking, I would stay away from
this rig. Neat coils of line leap into knots at my approach, and I
don't see that multiplying the yards of line in and about the cockpit
would be a good thing for me. The jib-headed boom sprit rig with a
single, single-part sheet is the match for my temperment.

Peter
Perhaps I've lost my mind and I certainly do not wish to read more
into Peter V.'s comments then what Bruce has but,I seem to recall
reading somewhere comments from Bolger(?) that despite what looked
workable on paper for ALERT has in reality not dished up the
advantages once hoped for.To extract the maximum performance from
this rig,too many elements have to be virtually custom"tweeked" all
the way from the lower batten to the top AND front to back.Also,there
was some question/doubt as to the overall effeciancy of this "many
lines,many fittings" system.
By now,I would suppose that alot of the early bugs have been worked
out by the very capable owner of ALERT however I have yet to read any
final report on this from the designer.
It is a rig that is relatively expensive for all of its area and in
the smaller sizes,such as contemplated here,may not actually present
any real performance advantages over more conventional rigs available
for a boat of the LONG MICRO model.
As to the dynamics you speak of Bruce,I think if you can locate the
appropriate centers of resistance and effort,the game is half won and
the same rules apply.
Sincerely,
Peter Lenihan,enjoying some down time at work while pitching in his
02cents worth just for the fun of it while the snow continues to
fall.......





--- In bolger@y..., "brucehallman" <brucehallman@y...> wrote:
> Peter says what I was thinking. IOW,
> the dynamics of the center of the force
> of the wind on the sails, against the lateral
> plane of the boat would be significantly
> changed if you 'stretched' the Micro
> Navigator sail plan. It could be done,
> and PCB could do it easily.
>
> If I were to try, the first attempt would
> probably be a failure, and the second
> attempt a success.
>
> [Another reason to use poly-tarp sails.]
>
>
> --- In bolger@y..., "pvanderwaart" <pvanderw@o...> wrote:
> > > What would be the problem with a Chinese
> > > Gaff sail rig on a Long Navigator?
> >
> > I think the thinking behind the comment is that although the
> > Navigator cabin might be grafted to the Long Micro without much
> > change, a Chinese Gaff rig would require a careful redesign. Not
> that
> > it couldn't be done, but that it hasn't been done.
> >
> > Peter
Peter says what I was thinking. IOW,
the dynamics of the center of the force
of the wind on the sails, against the lateral
plane of the boat would be significantly
changed if you 'stretched' the Micro
Navigator sail plan. It could be done,
and PCB could do it easily.

If I were to try, the first attempt would
probably be a failure, and the second
attempt a success.

[Another reason to use poly-tarp sails.]


--- In bolger@y..., "pvanderwaart" <pvanderw@o...> wrote:
> > What would be the problem with a Chinese
> > Gaff sail rig on a Long Navigator?
>
> I think the thinking behind the comment is that although the
> Navigator cabin might be grafted to the Long Micro without much
> change, a Chinese Gaff rig would require a careful redesign. Not
that
> it couldn't be done, but that it hasn't been done.
>
> Peter
Naw, he should build the Chebacco Motor Cruiser, or the Light Cruiser,
instead of one of those boxy looking things!
(just kidding!)


----- Original Message -----
From: "Bruce Hector" <bruce_hector@...>
To: <bolger@yahoogroups.com>
Sent: Sunday, November 03, 2002 9:46 PM
Subject: [bolger] Re: micro navigator


| Not exactly a Long Micro Navigator, although it may have inspired the
| Navigator, is a photo of a Glass House Long Micro that was advertised
| sale in MAIB a few years back. The pic is in Bolger2, the files
| section, in the file "bolger Scans" that I added a while back.
|
| As a full blown Long Micro version, tyhe Navigator would be an awsome
| budget cruiser.
|
| Bruce Hector, whose Micro "Riff-Raff" is under wraps at Rust Check as
| we strive to keep up with the demands of the war on rust spraying
| cars from pre-dawn to 9 pm. Hey, I even have Sunday off but I'm too
| nackered to do anything but moan on the couch and watch the Comedy
| Channel.
|
|
|
| Bolger rules!!!
| - no cursing, flaming, trolling, spamming, or flogging dead horses
| - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
| - add your comments at the TOP and SIGN your posts and <snip> away
| - To order 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
|
| Your use of Yahoo! Groups is subject tohttp://docs.yahoo.com/info/terms/
|
|
Not exactly a Long Micro Navigator, although it may have inspired the
Navigator, is a photo of a Glass House Long Micro that was advertised
sale in MAIB a few years back. The pic is in Bolger2, the files
section, in the file "bolger Scans" that I added a while back.

As a full blown Long Micro version, tyhe Navigator would be an awsome
budget cruiser.

Bruce Hector, whose Micro "Riff-Raff" is under wraps at Rust Check as
we strive to keep up with the demands of the war on rust spraying
cars from pre-dawn to 9 pm. Hey, I even have Sunday off but I'm too
nackered to do anything but moan on the couch and watch the Comedy
Channel.
> What would be the problem with a Chinese
> Gaff sail rig on a Long Navigator?

I think the thinking behind the comment is that although the
Navigator cabin might be grafted to the Long Micro without much
change, a Chinese Gaff rig would require a careful redesign. Not that
it couldn't be done, but that it hasn't been done.

Peter
Actually Bruce, there is Alert, the Manatee with a Bolger chinese
gaff rig, which has sailed the oceans of the world. A Google search
will locate her.
DonB

--- In bolger@y..., "brucehallman" <brucehallman@y...> wrote:
> --- "janandchuck" <janandchuck@h...>
> > Is there a long micro version of the
> > micro navigator plans?
>
> I have never heard that
> the Long Micro has a Navigator
> version.
>
> I think that stretching the cabin
> of Micro Navigator would
> be easy, but the 'big deal' of
> Micro Navigator is the Chinese
> Gaff rig sail, which would be a
> bigger deal to 'stretch'.
>
> PB&F would probably be willing to
> quote a price [and probably not
> that expensive] to update the
> Long Micro with a Navigator version.
>
> The best way to ask them is to
> send them a fax, [no email]
> they are friendly and helpful.
--- In bolger@y..., "brucehallman" <brucehallman@y...> wrote:
> --- "janandchuck" <janandchuck@h...>
>> I think that stretching the cabin
> of Micro Navigator would
> be easy, but the 'big deal' of
> Micro Navigator is the Chinese
> Gaff rig sail, which would be a
> bigger deal to 'stretch'.
>
Hi Bruce,
What would be the problem with a Chinese
Gaff sail rig on a Long Navigator?
You could write Bolger. However, I predict he would ask you to start from
first pricipals.

If you are not specificaly looking for a long micro navigator, maybe you
should tell us what you are wanting the boat for, and I'm sure someone on
the list could recommend one for you.

----- Original Message -----
From: "janandchuck" <janandchuck@...>
To: <bolger@yahoogroups.com>
Sent: Sunday, November 03, 2002 9:14 AM
Subject: [bolger] micro navigator


| is there a long micro version of the micro navigator plans if there
| is could i have price and e-mail address to buy on line. any
| information would be helpful
| thank you chuck
|
|
|
| Bolger rules!!!
| - no cursing, flaming, trolling, spamming, or flogging dead horses
| - stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
| - add your comments at the TOP and SIGN your posts and <snip> away
| - To order 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
|
| Your use of Yahoo! Groups is subject tohttp://docs.yahoo.com/info/terms/
|
|
--- "janandchuck" <janandchuck@h...>
> Is there a long micro version of the
> micro navigator plans?

I have never heard that
the Long Micro has a Navigator
version.

I think that stretching the cabin
of Micro Navigator would
be easy, but the 'big deal' of
Micro Navigator is the Chinese
Gaff rig sail, which would be a
bigger deal to 'stretch'.

PB&F would probably be willing to
quote a price [and probably not
that expensive] to update the
Long Micro with a Navigator version.

The best way to ask them is to
send them a fax, [no email]
they are friendly and helpful.
is there a long micro version of the micro navigator plans if there
is could i have price and e-mail address to buy on line. any
information would be helpful
thank you chuck