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Old 22-06-2011, 15:45   #1
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which inflatable

hi my name is david have a 9.9 mercury outboard and currently have a 6 year old waveline 2.9 airbed inflatable which has a max outboard capacity of 8hp,when i use the engine at full power the boat bends and flexes quite alarmingly. would a new waveline 3.2 airbed inflatable which it says can handle up to a 15hp engine still have the same problems many thanks
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Old 22-06-2011, 16:05   #2
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Re: which inflatable

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hi my name is david have a 9.9 mercury outboard and currently have a 6 year old waveline 2.9 airbed inflatable which has a max outboard capacity of 8hp,when i use the engine at full power the boat bends and flexes quite alarmingly. would a new waveline 3.2 airbed inflatable which it says can handle up to a 15hp engine still have the same problems many thanks
Hey Bazley,
Does the new waveline have a ridgid bottom?
If not i'd strongly suggest getting one with this feature as i'd think it would be needed to stop the boat bending with the speed of a 15hp engine?

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Old 22-06-2011, 16:09   #3
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Re: which inflatable

thanks for the reply but i only have a 9.9hp but it says the 3.2m waveline will take up to a 15hp
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Old 22-06-2011, 16:41   #4
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Re: which inflatable

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thanks for the reply but i only have a 9.9hp but it says the 3.2m waveline will take up to a 15hp
Opps my bad, I misread your post, can i blame the beers and watching sunset in ST Lucia?

Hope it all works out
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Old 22-06-2011, 16:54   #5
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Re: which inflatable

The rating is for the general amount of thrust that can be transmitted through the transom and float connections - so a dinghy rated at 9.8 horsepower will not flex or bend the larger 3.2m dinghy - in fact, an outboard rated at 15 hp will not flex or bend the larger dinghy...

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Old 24-06-2011, 20:12   #6
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Re: which inflatable

From looking at the Airbed inflatables, they are what I call "pure inflatables" - that is they do not have a rigid keel or bottom. My old 11 ft Avon roll-up is the same type of dinghy even though it has a fiberglass sectioned floor.
- - The keel of a pure inflatable dinghy is an inflated high pressure tube and the floor is normally a separate inflated bladder or sometimes plywood panels.
- - Unless you seriously over-inflate the keel, floor and tubes, the pure inflatable dinghy will do a "snake dance" when you try to get it up on plane. If the tubes are not rigid then you can get a dramatic folding in half of the dinghy as the outboard engine pushes the stern forward but the bow half of the dinghy is held back by water pressure. Overpowering with a larger engine makes the bending more pronounced.
- - My 11 ft Avon does a dramatic snake maneuver as it tries to get up and on plane. The bow wave ripples back through the boat as a "hump" until finally it is left astern.
- - This is normal for pure inflatables and why most everybody has moved to RIB's (fiberglass or metal hulls with inflatable tubes surrounding).
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Old 25-06-2011, 00:14   #7
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Re: which inflatable

thanks for the replies
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Old 25-06-2011, 03:22   #8
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Re: which inflatable

Dump the inflatable and get a hard dinghy. The guy who invented inflatable dinghies should be made to shove each one up near to where a monkey keeps his nuts. They are the most diabolical pieces of junk ever made, witness all the heaps of non-biodegradable fabric scattered around the boatyards of the world.
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Old 25-06-2011, 03:37   #9
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Re: which inflatable

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thanks for the reply but i only have a 9.9hp but it says the 3.2m waveline will take up to a 15hp
That doesn't mean it's right.
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Old 25-06-2011, 03:39   #10
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Re: which inflatable

that does not mean what is right
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Old 25-06-2011, 03:54   #11
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Re: which inflatable

My wife and I have a firm belief that every inflatable we have ever owned was posessed.

They tow badly, difficult to get novices in and out of ( especially in those ridiculous shoes), they leak air, etc etc

But they never once scratched my topsides!
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Old 25-06-2011, 03:57   #12
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Re: which inflatable

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My wife and I have a firm belief that every inflatable we have ever owned was posessed.

They tow badly, difficult to get novices in and out of ( especially in those ridiculous shoes), they leak air, etc etc

But they never once scratched my topsides!
even with my limited experience i think i agree with you
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Old 25-06-2011, 04:28   #13
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Re: which inflatable

See
ABYC S-7" Boat Capacity Labels
http://www.abycinc.org/committees/s-07.pdf
and
ABYC H-28" Inflatable Boats
American Boat and Yacht Council (ABYC) - Page not Found
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Old 25-06-2011, 04:33   #14
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Re: which inflatable

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that does not mean what is right
Whatever " it " says.

" thanks for the reply but i only have a 9.9hp but it says the 3.2m waveline will take up to a 15hp "

Bite the bullet and get a RIB.
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