Dinghy Disappointment :(/Dinghy Joy :)

[SVNeko]

Originally Posted by Cheechako

I meant RIB.
The one in my avatar? it had custom removeable davits, not on in that picture.
on my HC38: Foredeck 9ft RIB
On my 42 Cat: Davits
On my Passport 47: Foredeck

Good lord, why do you have so many boats, and big ones?

[ghendoaus]

Originally Posted by Dockhead

A Ducati outboard --

would be cool . . .

Hahahahahahahaaaaaaa

[Panope]

Originally Posted by Dockhead

.........Concerning the motor -- I'm also liking this. It's a Selva 8hp ultralight 4 stroke. It's ultra-cheap and ultra-plasticky as well as ultra-light, and I don't know whether it will hold up as well as the previous Mariner two-stroke, but it's working well so far. It doesn't start as easily as the old one, but starts ok. It's a one-cylinder and vibrates, but this has not bothered me at all. It's not enough power to plane with more than two people, and barely planes with two, but it's plenty of power for any non-planing use..........

Hi Dockhead,

I am looking to get an outboard for a 310 sized, lightweight dinghy, and I am trying to predict planing performance with a high degree of accuracy.

Can you tell me the amount of load in kilograms, your current tender will plane?



Thanks,

Steve

[Dockhead]

Originally Posted by Panope

Hi Dockhead,

I am looking to get an outboard for a 310 sized, lightweight dinghy, and I am trying to predict planing performance with a high degree of accuracy.

Can you tell me the amount of load in kilograms, your current tender will plane?



Thanks,

Steve

Can't say with great precision, but the 8hp Selva four-stroke, which weighs 27kg, will plane the dink with two people plus gear fairly easily, and will stay on a plane with reduced throttle. Three people only with difficulty and full throttle and very calm water. Four people not at all. "People" means normal size folks, average 75kg, no porkers. YMMV.

But weight is not the only story -- hull form is also important. So this experience is probably only relevant to this specific dink -- Avon Lite 310 folding transom RIB.

[SVNeko]

Originally Posted by Dockhead

A Ducati outboard --

would be cool . . .

Maybe after you installed the aftermarket mods to prevent the hunting and surging... etc.

[Panope]

Originally Posted by Dockhead

Can't say with great precision, but the 8hp Selva four-stroke, which weighs 27kg, will plane the dink with two people plus gear fairly easily, and will stay on a plane with reduced throttle. Three people only with difficulty and full throttle and very calm water. Four people not at all. "People" means normal size folks, average 75kg, no porkers. YMMV.

But weight is not the only story -- hull form is also important. So this experience is probably only relevant to this specific dink -- Avon Lite 310 folding transom RIB.

Thanks DH,

I briefly borrowed a twin cylinder Honda 8HP and it had reserve power while planing 150 kg. The engine weighs 42 kg. and is ABSOLUTELY too heavy for what I need to do.

The Selva engines are not sold in my area, so it looks like I will be stuck with 6 HP at about 27kg.

Here is a video (not mine) of a 6 HP planing a claimed 200 kg. Impressive.

https://www.youtube.com/watch?v=fq90cxECr3U

[Dockhead]

Originally Posted by Panope

Thanks DH,

I briefly borrowed a twin cylinder Honda 8HP and it had reserve power while planing 150 kg. The engine weighs 42 kg. and is ABSOLUTELY too heavy for what I need to do.

The Selva engines are not sold in my area, so it looks like I will be stuck with 6 HP at about 27kg.

Here is a video (not mine) of a 6 HP planing a claimed 200 kg. Impressive.

The difference is that the Selva has only one cylinder. This means it vibrates a lot more, but that doesn't seem to be of any consequence.

Before anyone thinks I'm selling them - they are cheap to buy, and the cheapness shows everywhere. I haven't had any trouble so far, but I don't expect the Selva to be nearly as durable as my old Mariner two stroke. We shall see.

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