C-C 40 – 44 12 – 13.4m Power Catamarans
This page is a presentation of the contents of the Study Plan Packs Located left hand column > Study Plan Packs > Power Catamarans > C-C 40 – 44 12 – 13.4m, along with some additional comments. The above S/P pack can be downloaded from Study Plans and saved to your computer for viewing and individual prints of each photo, drawing and details.
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5 New Very Economical Power Catamarans
Over the last few months most of my spare time has been devoted to developing a new range of super efficient power catamarans. The purpose for this exercise was to allow future Compu-Craft owners to GO FURTHER or FASTER for the SAME DOLLARS.
My Power Catamarans have always been far better than most at achieving this endeavour. All the C-C 38 to 44 foot range provide cruising speeds of 10 to 14 knots for fuel consumption of a litre per nautical mile travelled and the engines installed have ranged from 65 to 120 HP per side. This has applied now for about Fifteen years or so, after I had spent many hundreds of hours on the computers developing what was then very advanced underwater shapes for these boats. All this work was bought about after some very encouraging results, from a previous study and developmental program of Sailing Catamaran hull shapes to reduce the Sailing Catamaran’s unpleasant pitching motion (This motion also reduced their sailing performance.) and also resulted in designs that were far less likely to capsize. All this took place in the early Nineties and now the rising COST OF FUEL has driven me to DO IT ALL AGAIN.
That last generation of Power Catamarans was a great success, ask anyone who owns a Compu-Craft Power Cat and they will tell you so.
NOW THERE IS A WHOLE NEW RANGE of Compu-Craft designs, available from 37 to 63 feet long (11m to 19.2m) and ALL OF THESE BOATS are MUCH MORE ECONOMICAL than the previous boats.
ANOTHER piece of GOOD NEWS is that all the future plans for the present range of proven Compu-Craft power catamarans can now be provided with this NEW IMPROVED underwater shape.
This new hull form has ANOTHER ADVANTAGE – The size of the motors are not limited to around that 100 HP or so and a top speed of 18 to 20 knots. These boats can now be powered to cruise economically at any speed from Eight to Thirty knots or more and do so for far less FUEL COST, than any other type of boat. (See Table of speed/power.) The reason THIS IS SO! – These boats are not designed to rise up onto the plane at speed as most other designs do. These are true displacement boats and a great deal of fine tuning of these designs was aimed at preventing the bow from trimming up. On the other hand, they make very little wash and at speed trim almost level. This attitude helps to reduce pitching and positively prevents the hulls from pounding. (A real problem with planing hulls.)
Four of the designs in this range are Fly Bridge cats similar in style to the Big Game fishing boats, but with a few different features. These boats are designed for living aboard and long range cruising, family weekends and holiday trips. THEY HAD TO BE PRACTICAL.
So feature One :- These hulls had to be ECONOMICAL and perform IMPECCABLY at any speed, UP TO that achievable by the installed power. This ruled out planing hulls that would perform best only at planning speed and not so well at lower speeds.
Two. The Fly Bridge style has a lot going for it, especially on a catamaran, but it needs to be put to better use than just a sundeck and a place to steer the boat from – Then let’s put some accommodation in it as well. The steering position is still there of course, plus a couple of moveable stable chairs, a spacious lounge/dinette that folds into a double bunk, for those calm starry nights, and next morning there is a small galley to knock up a cuppa in bed before breakfast on the upper deck. This galley also serves as a bar through the day.
Three. To get to this little heaven in the sky, there is a proper set of stairs. Not a fragile S/S ladder that scares the daylights out of the little woman. YOU NEED her up there to serve the drinks and cook the brekkie. (And nudge you, when the boat is about to go aground.)
Four. The owners of these boats will often do their own maintenance, so the engine rooms had to be spacious, stand up headroom and Two metres wide.
Now if you look at the drawings I’m sure you will notice many more features of interest.
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On A Different Tack
The other design in this collection is the C-C 43 Family MS the details are set out below and the first question should be – What is MS?
MS stands for “MOTOR SAILER”. That’s right a Motor Sailer Catamaran.
This design has borrowed features from both Power and Sailing cats, such as Two large double cabins in the stern, along with a large hard top covered cockpit, an elevated steering position that has 360 degree vision over the cabin top with seating for Three people, a huge saloon galley and dining area. Top this off with Two spacious lockup tlt. shr. vanity and double cabin suites, again the engine rooms have standing hd. room and miles of space round each engine.
The drawings here show the Power Cat version without a rig, but I am in the process of completing the sailing version. Note :- This design has no centreboard,(It could have.) so it will not go to windward without some engine assist. However IT WILL GO VERY MUCH faster than most other mono motor sailers on all other points of sailing. If long range cruising at constant above average speeds is a dream, then this boat with its great accommodation and a Twenty HP diesel in each hull, will be a very cost effective and convenient CRUISING MACHINE.
The NEW DESIGNS that make up this range are listed below:-
Compu-Craft – C-C 43 Family MS Power Catamaran.
LOA. 13.3m 43’ 8”
LWL 13.0m 42’ 7”
Beam 6.32m 20’ 9”
Draft 0.9m 3’0”
HP/Side Top Speed Cruise Call Up HP
21 10kts 7 / 8kts 16
63 15kts 10 / 12kts 30
137 20kts 15 / 17kts 75
231 25kts 18 / 20kts 131
375 30kts 24 / 26kts 242
NOTE :- The C-C 43 Family MS (Above) Can Be Rigged As A MOTOR SAILER.
Compu-Craft – C-C 37 SunCoast Fly Bridge Power Catamaran. (Plan Yet To Be Finished.)
LOA. 11.3m 37’ 0”
LWL 9.88m 32’ 5”
Beam 5.25m 17’ 3”
Draft 0.76m 2’6”
HP/Side Top Speed Cruise Call Up HP
NOTE :- Engine Requirements Are Yet To Come.
Compu-Craft – C-C 43 SunCoast Fly Bridge Power Catamaran.
LOA. 13.4m 43’ 11”
LWL 11.72m 38’ 5”
Beam 6.15m 20’ 2”
Draft 0.9m 3’0”
HP/Side Top Speed Cruise Call Up HP
21 10kts 7 / 8kts 16
65 15kts 10 / 13kts 42
135 20kts 14 / 16kts 70
235 25kts 17 / 20kts 130
370 30kts 24 / 27kts 240
Compu-Craft – C-C 53 SunCoast Fly Bridge Power Catamaran.
LOA. 16.15m 53’ 0”
LWL 14.2m 46’ 7”
Beam 7.51m 24’ 7”
Draft 1.1m 3’7”
HP/Side Top Speed Cruise Call Up HP
27 10kts 8kts 18
82 15kts 10 / 12kts 36
165 20kts 15 / 17kts 95
290 25kts 18 / 20kts 153
450 30kts 25 / 27kts 355
Compu-Craft – C-C 63 SunCoast Fly Bridge Power Catamaran.
LOA. 19.08m 62’ 7”
LWL 16.76m 54’ 9”
Beam 8.74m 28’ 8”
Draft 1.3m 4’26”
HP/Side Top Speed Cruise Call Up HP
91 15kts 12kts 60
206 20kts 17kts 124
390 25kts 18 / 21kts 195
650 30kts 24 / 26kts 385
800 32.5kts 25 / 28kts 410
NOTE :- All these boats can be powered for more performance.
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C-C 40 Power Catamaran
How It’s Done
This is a combined end grain and long grain balsa core (Stripped into planks.) as fibreglass composite, hulls and superstructure. As can be seen the finish is determined from day one. This boat is well finished, from end to end, top to bottom.
The Big Day – Launching 
Now That She Floats On Her Marks - It’s Time ForTrials
This collection of designs have been produced with a range of accommodation layouts and constructed from almost every known building method and now an Alloy Frame Panel Skin design is under construction.
Photos and Drawings : See C-C 39 Below
This Is How The Alloy Frame Boats Go Together ,A Few More Stringers, And The Skin Goes On (Minimum Fairing) And It Is Time To Turn It Over.
The New Compu-Craft C-C 39 Alloy Frame Power Catamaran
C-C 43 Power Catamaran
A Real Family Boat This One – Sleeps The Round DOZEN.
An updated wider beam version is in the planning for this design now.
This Is REAL ROOM TO MOVE
Recognize the gentleman at the helm. If he would just turn his head a little, I’m sure almost every boatie in Australia would say “That’s ----“
At Last Count There Was About Seven Of These Under Construction
Compu-Craft Yacht Designs
C-C 40 to 44 Power Catamarans :- The Forty footers are a progression from these boats in the 30 - 38 foot range and most of them have been built using cedar strip plank.
The C-C 44 however is a break from One Off methods as these are moulded in Fibreglass out of a female mould and there are several under construction by different yards in Queensland. The mould for these hulls was built by Bruce Harris of “Shark Cat” fame and are therefore of good finish and A1 structure. These hulls are available for sale ready for home or professional completion of decks, superstructure and fit-out. The fist of them is now in the water.
The finished boats are big boats with sumptuous accommodation over three levels and are ideal for a day on the bay with up to thirty friends and family on board or extended live aboard cruising in the lap of luxury.
The first boat is fitted with 160 HP diesels per side and on sea trials achieved 18 kts. at 2000 RPM this is far above expectations, although she was still a light ship, with some finishing off yet to be completed. (Fly bridge is not yet fitted.) So fuel economy will be a strong point as it is with all of our power catamarans.
Dimensions :-
LOA 44’ – 48’ (14.5 – 14.5m) Depending on how the stern is finished.