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Old 04-08-2017, 07:51 PM
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guzzis3 guzzis3 is offline
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Fish and Chips

Sorry to start a new topic but I can't find one specifically for this design.

This boat must be badly overloaded. I'd hate to think that's how it's designed!

http://www.bateau123.ca/voilier/voil...es-id17686.php
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  #2  
Old 04-09-2017, 02:31 AM
jamez jamez is offline
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Quote:
Originally Posted by guzzis3 View Post
Sorry to start a new topic but I can't find one specifically for this design.

This boat must be badly overloaded. I'd hate to think that's how it's designed!

http://www.bateau123.ca/voilier/voil...es-id17686.php
I doubt very much it was designed to have two 9.9 4 strokes on the arse. A more appropriate question might be was it built to spec.
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Old 04-09-2017, 03:37 AM
Mr Efficiency Mr Efficiency is online now
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Not much clearance, but it does seem to be trimming low at the stern in the other pix.
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Old 04-09-2017, 07:51 AM
Manfred.pech Manfred.pech is offline
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Originally Posted by jamez View Post
I doubt very much it was designed to have two 9.9 4 strokes on the arse. A more appropriate question might be was it built to spec.
That might be the problem. A 9,9 Yamaha weighs in the lightest version 93lb (42kg), the high thrust 104lb (47kg) without fuel. Two of them at the stern with fuel is a lot and a bad trim.
http://www.boats.net/outboard_motor/...9HP/parts.html

http://www.teamscarab.com.au/7.3cat/design.html

Length Overall................. 7.3m (24' 0")
Beam Overall................... 4.6m (15' 0")
Width on trailer............... 2.5 (8' 0")
Draft.............................. 375 mm - 1250mm (1'3" - 4' 0") pivoting boards
Displacement to DWL........1600kg (3520#)
Weight.............................(approx) 950kg (2090#)
Main Sail........................ 22 sq m (240 sq ft)
Jib........................... 8 sq m (86 sq ft)
Mast height...............9.65m (31' 8 ")
Construction.............6mm plywood
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  #5  
Old 04-09-2017, 05:05 PM
Ray Kendrick Ray Kendrick is offline
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Hi,
The photo certainly appears to suggest that the cat is overloaded and possibly not built to plan. The floor of the demountable cockpit as designed is just below (25mm) the bottom of the beam. The design specifies one 9 to 10 hp outboard mounted at the centre of the beam.
Regards
Ray Kendrick
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  #6  
Old 04-10-2017, 01:50 AM
redreuben redreuben is offline
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The design has been butchered, probably why its for sale, there shouldn't be anything below the rear beam let alone a huge boxy cockpit, maybe it was built by a mono sailor ?
Still, nothing a chainsaw wouldn't fix
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Old 04-10-2017, 02:40 AM
Mr Efficiency Mr Efficiency is online now
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I don't think an extra 9.9 O/B's weight is of any significance. Not a chance !
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Old 04-10-2017, 05:10 AM
jamez jamez is offline
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Think about it. 2x9.9's + 20 litres of fuel is probably 20-25% of the payload. Right on the back. Choice. Take them both off and i'd bet it floats level.
A single 5-8hp LS 2 stroke would be ample for a boat that size and mounted further forward on a GBE style centre pod would be even better. It must be frustrating being a designer and seeing people f**k your boats up like that.
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Old 04-10-2017, 05:25 AM
Mr Efficiency Mr Efficiency is online now
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Any 23 foot boat that is unbalanced by a 9.9 hp outboard is a ***** ** *** to start with.
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  #10  
Old 04-10-2017, 05:49 AM
jamez jamez is offline
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Get real dude: most small multis are weight and trim sensitive. Doesn't make them heaps of ****, even if the less discerning might struggle with the concept ...........
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Old 04-10-2017, 05:51 AM
basil basil is offline
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Fair suck of the sav Cobber - thats a bit harsh. I think Ray Kendrick designs fine boats and you should go and wash out your mouth with soap.
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  #12  
Old 04-10-2017, 06:03 AM
Mr Efficiency Mr Efficiency is online now
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Give me the figure for the difference in trim by adding 50 kg ( less than 3% of the hull weight) to the stern. In this case it is actually forward of the stern. If that is enough to bugger things up, then what can I say ! The rear view shows the hulls are not that slender.
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  #13  
Old 04-10-2017, 09:40 AM
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brian eiland brian eiland is offline
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I installed a single (steerable) 9.9 Yamaha 4 stroke OB on the first Louisiane 37 footer I imported to the USA. It pushed that boat a 7 knots in flat water, and was very maneuverable in close quarters once you got use to it. (steerable engine/prop is key word/concept)

No need for twin OB's on that 24' design.
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