Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 22-04-2010, 16:12   #406
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Displacement Hull Speed

Edmund,

The D1-30 engines are nice in the respect that you have the extra power if you need it and you can run fast on one engine and save fuel. Changing props will not make her any faster.
When you hit Hull Speed, that is your limiting factor.
I have plenty of power to spare but am limited by Hull Speed.
The only way to go faster than displacement Hull Speed is to buy a longer boat, not buy an oversized prop.

I have been at Hull Speed a few times and its nice to impress the friends, but you can see the dollar bills shooting out the sugar scoops at a high rate and your wallet feels like it just went on a diet

Mark
__________________

__________________
Cotemar is offline   Reply With Quote
Old 23-04-2010, 01:48   #407
Registered User

Join Date: Mar 2010
Location: Norheimsund, Western Norway
Boat: FP Mahe 36 #108 "Caramba"
Posts: 104
Images: 2
Hull speed

I'm not convinced about this, Mark.

The normal way of calculating hull speed don't quite fit for a catamaran. Calculated the old way we would have a hull speed of 8,3 knots, and we all know they go faster.
It's well known that a long narrow hull may manage to get out of it's own wave, and I think (or perhaps hope..) our hull's do it fairly easy. And it's also well known that if you do, the wave resistance isn't increasing in the same rate as it is before you hit the wave. It 's a bit like a boat planing: once you pass the barrior, the increase in resistance drops.
When you say you hit hull speed, I actually think you have passed it, and the reason for the dollar spending is that your engines is running at max RPM, as your props don't allow anything else.

All this is of course pure assumptions from me, as I have not tried anything yet nor do I have any qualifications on the issue, I'm only guessing...

What speed do you feel is your hull speed when motoring, and at what RPM? And what is the max speed ever reached, also when sailing?

Edmund
__________________

__________________
Edmund is offline   Reply With Quote
Old 29-04-2010, 00:53   #408
Registered User

Join Date: Mar 2010
Location: Norheimsund, Western Norway
Boat: FP Mahe 36 #108 "Caramba"
Posts: 104
Images: 2
I've been informed by FP that they refuse to deliver my boat with 18x13 folding props within warranty. So I will have to stick with the 17x12 for now...
__________________
Edmund is offline   Reply With Quote
Old 29-04-2010, 04:41   #409
Registered User
 
Jef & Marin, Netherlands's Avatar

Join Date: Feb 2008
Location: Liveaboard
Boat: Switch 51 #10
Posts: 452
sails or engine?

Edmund, Mark and others,
I am a bit surprised about the focus on engine horsepower, propeller diameter, speed when under engine etcetera. The Mahe being a sailboat.
If I would spend extra money, I would purchase a code 0 sail, for 60-110 degrees wind when we can not use the spi.

We are happy to engine at 2000 rpm using one engine, or 1700 rpm using two engines. The ship will do 5 knots (2 * 20 HP). Sometimes we even do 1700 rpm on engine engine, 4.5 knots.
And we only use the engine prolonged if boat speed falls below 2 knots or so, or if we have to reach a certain location for the tide or a bridge opening.
Last season we used 300 liters of fuel in 270 engine hours (135 each engine). Only in one case in 7200 nm, in 2008, I would have appreciated more power. To get against the force 8 wind.

Kind regards,
Jef
__________________
Jef & Marin, Netherlands is offline   Reply With Quote
Old 30-04-2010, 07:19   #410
Registered User

Join Date: Mar 2010
Location: Norheimsund, Western Norway
Boat: FP Mahe 36 #108 "Caramba"
Posts: 104
Images: 2
Jef,
The possibility of achieving perhaps as much as 40-50% higher speed as we would in a similar size monohull, both sailing and motoring, was important to us when we chose to go for a catamaran.
On rig and sails it seems to be well known what to do to utilize and optimize the Mahe's potential, but when it comes to motoring speed I think there is more to gain. And motoring speed is important to some of us who comes from a life in a motorboat. I think there is a lot of motorboat-owners who would like to convert to sail, but hesitate because of the big drop in motoring speed. I also think that the sail catamaran manufacturers don't utilize this selling argument as well as they could have done.

Edmund
__________________
Edmund is offline   Reply With Quote
Old 30-04-2010, 11:54   #411
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,423
FWIW,

As I researched whether to buy the normal engine or option for the larger one, after consulting the factory engineers, the conclusion was that the larger engine will burn more fuel and not move the boat any faster.

I normally motor at the optimum rpm, where the torque curve starts to flatten and the fuel economy is best. I'm not the least bit disappointed in the smaller engine. The few times we motor with wind on the nose isn't worth the cost, both capital and operating costs, of the larger engine.
__________________
DotDun is offline   Reply With Quote
Old 20-05-2010, 19:21   #412
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Fountaine Pajot Mahe 36 Evolution

In premier and while waiting her official presentation in the main boat shows of the world.
Here is the introduction of the: MAHE 36 EVOLUTION.

She benefits of the highest level of innovation of the range. The improvements including:
- A totally rigid bimini with integrates a dual helm seat
- The main sail track is mounted on the bimini.
She Joins the new look of the Fountaine Pajot range.
http://www.catamaran-mahe-evolution.com/
Attached Thumbnails
Click image for larger version

Name:	MAHE 36 EVOLUTION1.jpg
Views:	116
Size:	41.4 KB
ID:	16300   Click image for larger version

Name:	2.jpg
Views:	108
Size:	41.8 KB
ID:	16301  

Click image for larger version

Name:	3.jpg
Views:	119
Size:	34.2 KB
ID:	16302   Click image for larger version

Name:	4.jpg
Views:	141
Size:	33.2 KB
ID:	16303  

Click image for larger version

Name:	5.jpg
Views:	115
Size:	40.1 KB
ID:	16304   Click image for larger version

Name:	6.jpg
Views:	113
Size:	48.5 KB
ID:	16305  

Click image for larger version

Name:	7.jpg
Views:	115
Size:	51.1 KB
ID:	16306   Click image for larger version

Name:	8.jpg
Views:	127
Size:	49.8 KB
ID:	16307  

Click image for larger version

Name:	9.jpg
Views:	122
Size:	18.5 KB
ID:	16308   Click image for larger version

Name:	10.jpg
Views:	126
Size:	27.2 KB
ID:	16309  

Click image for larger version

Name:	11.jpg
Views:	122
Size:	32.3 KB
ID:	16310   Click image for larger version

Name:	12.jpg
Views:	122
Size:	28.8 KB
ID:	16311  

__________________
Cotemar is offline   Reply With Quote
Old 20-05-2010, 19:24   #413
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Fountaine Pajot Mahe 36 Evolution

After only three years in production, Fountaine Pajot has sold over 120 of its original Mahé 36 catamaran model, the smallest sailing cat in the company’s fleet.

For 2010 the boat has been re-designed with the addition of even more big-boat features, the most obvious being the addition of a full-length integrated hard top, making the Mahé 36 Evolution the first cat in its class with such a feature.

The rigid bimini houses all the sailing controls, including the mainsheet track and an integrated double helm seat for a commanding 360-degree view, just like its larger sibling the Lipari 41. This frees-up the entire cockpit for relaxing and entertaining. The result is a vast open living area protected from the sun and rain all the way from the spacious 160 sq ft saloon back to the aft guard-rails.

Inside there are also some design developments inspired by the newer, larger sailing cats in Fountaine Pajot’s range. The galley is equipped with better storage, two stainless steel sinks and a larger 130-litre capacity front-opening fridge, which is situated closer to the cockpit. The saloon table and main seating area has also been joined by a built-in bench seat that faces forward and doubles as another storage area.

Saloon comfort and ventilation have also been enhanced with the addition of two hatches either side of the mast in the wrap-around front screen. Throughout the boat the cabinetry is finished in cherry wood and upholstered with chocolate-coloured fabrics.

“The original design set a new standard in the 36-foot catamaran class and the new Evolution model takes the Mahé 36 to the next level,” says Carl Livett of M.i.Cats in Chichester, the UK’s sole importer of Fountaine Pajot catamarans. “The yard has taken a great design and made it even better – a real leader in its class.”

Available in two different versions, the ‘Trio’ will firstly appeal as a family yacht with a spacious three-cabin layout. But, in the ‘Duo’ two-suite set up (one suite per hull), the Mahé 36 is the envy of any 36-foot cruiser – an unbeatable package of space, comfort and privacy.

All this combined with the quality that comes with buying from the world’s most experienced cruising catamaran builder.
Attached Thumbnails
Click image for larger version

Name:	13.jpg
Views:	126
Size:	22.1 KB
ID:	16312   Click image for larger version

Name:	14.jpg
Views:	127
Size:	26.6 KB
ID:	16313  

Click image for larger version

Name:	15.jpg
Views:	121
Size:	20.7 KB
ID:	16314   Click image for larger version

Name:	16.jpg
Views:	124
Size:	20.4 KB
ID:	16315  

Click image for larger version

Name:	17.jpg
Views:	122
Size:	16.4 KB
ID:	16316  
__________________
Cotemar is offline   Reply With Quote
Old 26-05-2010, 06:43   #414
Registered User

Join Date: Nov 2008
Location: Singapore
Boat: Woodwind 10.3 catamaran
Posts: 16
Dear Sailors
Can anybody advice me on which autopilot system to buy for the mahe 36 evolution? Especialy the drive unit has interest as the boat will be used for long term cruising.
Best Regards
Jan Iversen
__________________
Jan Iversen is offline   Reply With Quote
Old 26-05-2010, 07:11   #415
Registered User

Join Date: Jun 2006
Location: Cocoa, Florida
Boat: Mahe, 36' "Oceanview"
Posts: 631
The factory can supply you with an autopilot in the Navigation package. I have a Furuno unit in mine, which came with the boat. Never had a problem with it and use it all the time.
__________________
Scott730 is offline   Reply With Quote
Old 26-05-2010, 07:12   #416
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Furuno NavPilot 511 autopilot

Jan Iversen,

Most FP Mahe’s are using the Furuno NavPilot 511 autopilot with a hydraulic ram to the steering quadrant.

Mark
Attached Thumbnails
Click image for larger version

Name:	P5280072.jpg
Views:	101
Size:	402.8 KB
ID:	16610   Click image for larger version

Name:	P5280074.jpg
Views:	107
Size:	399.7 KB
ID:	16611  

__________________
Cotemar is offline   Reply With Quote
Old 27-05-2010, 02:39   #417
Registered User

Join Date: Nov 2008
Location: Singapore
Boat: Woodwind 10.3 catamaran
Posts: 16
Furuno Autopilot

Thank you or your fast reply! Is it possible for you to be more specific on the drive unit, brand name and number? It does not seems to be incl. with the control unit? How long movement must it be able to make? Is there an electric bypass valve (for manual steering)? How much current can I expect it to draw?
Regards
Jan
__________________
Jan Iversen is offline   Reply With Quote
Old 27-05-2010, 05:46   #418
Registered User

Join Date: Jun 2006
Location: Cocoa, Florida
Boat: Mahe, 36' "Oceanview"
Posts: 631
Jan
You should check again with F-P. There are 2 options for electronics, one has the Autopilot. The boat also comes with an emergency tiller (hope no one has to use it).
To steer the boat manually, you just turn the autopilot off. I don't know if I'm understanding your question properly. I don't remember the exact current draw, but it is quite a bit. You should look up the Furuno NavPilot 511 for the spec's.
__________________
Scott730 is offline   Reply With Quote
Old 28-05-2010, 22:44   #419
Registered User

Join Date: Nov 2008
Location: Singapore
Boat: Woodwind 10.3 catamaran
Posts: 16
Thank you for your info. I'm now better informed to choose an autopilot.
regards Jan
__________________
Jan Iversen is offline   Reply With Quote
Old 05-07-2010, 13:05   #420
Registered User

Join Date: Mar 2010
Location: Norheimsund, Western Norway
Boat: FP Mahe 36 #108 "Caramba"
Posts: 104
Images: 2
At home, at last.

Our Mahe is finally in her berth in Norway, after a 1350 Nm trip from La Rochelle, up the Irish sea, through the Caledonian Channel, via Shetland across the North sea and home. A fantastic 16 days journey in a fantastic boat (effective 14 days, we made a two days break in Lerwick)
I think our hull 108 might be the last one delivered with the "old" design, maybe expect for the hull 69, built in 2008, still laying in the harbour in La Rochelle, with the plastic covers still covering the pillows and only 30 hours on the engines. I didn't ask why it was still lying there.
Our Mahe has the square top main, and one line reefing, very satisfied with both. The boat make no noise or squeaks whatsoever, so far. According to your reports, I was expecting some squeaks, but no, it's just silent.
On the other hand, we were a bit suprised by the occational very heavy banging in the tunnel with the seas coming in 45 deg sideways. Several times we vere sure we had hit some really heavy object in the water, but no, we didn't... We just need to get used to that.
Now we look forward to a nice, but windy summer in western Norway.
__________________

__________________
Edmund is offline   Reply With Quote
Reply

Tags
mahe 36

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mahe 36: Bimini The South African Fountaine Pajot 115 27-07-2016 08:35
Mahe 36: In General DtM Fountaine Pajot 56 27-07-2016 08:20



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:30.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.