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Old 17 March 2012, 17:35   #1
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On the plane.... almost!

Hi Guys,

Took the wife's Ribeye IF250 2.5m inflatable out last weekend.This is an inflatable V hull model and nice and light. I also bought her a 2003 Mariner 5hp 2-stroke engine to go with it.

The engine seemed to run well, and it was great fun.

The boat didn't quite get up onto the plane though, so was just wondering if there was any tips to help with this, or do you think that the engine isn't ever going to be quite powerful enough to do this?

We were both in the boat, so maybe it would with only one of us, but that would defeat the point of having the little boat, and I certainly couldn't trust her to take it out by herself

The boat specs 5hp as the max... but I'm brave
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Old 17 March 2012, 17:37   #2
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Oh.. here's a video if it helps...

[youtube]
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Old 17 March 2012, 17:49   #3
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I'm not sure if 5 HPI will get 2 adults on the plane..... But you could try circling round a few times to create a ripple in the water then go straight forward.....as you go full speed across the ripples it "might" help
.. I'm no expert and not sure it will work, worth a try though
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Old 17 March 2012, 17:56   #4
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LOL Brainz - was the set up REALLY for your wife??
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Old 17 March 2012, 17:56   #5
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That video cheered my evening up a lot

You certainly did look close to planing. I'd recommend a tiller extension. Don't buy one to try - just use a piece of PVC piping and test it. Sitting forward can help get over the hump. Other than that you look OK. Put the fuel in the bow. Make sure that your tube and deck pressures are perfect, i.e. use a gauge. If that doesn't do the do for you, try experimenting with different trim levels. Start low and work your way up.

I'd agree than 5hp is a touch low for two adults planing, but you don't look like XL fits, so fingers crossed.
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Old 17 March 2012, 18:26   #6
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Quote:
Originally Posted by Dusk View Post
LOL Brainz - was the set up REALLY for your wife??
Yes.. The boat was her Christmas present, and the engine was a special treat for Valentines Day

The seat fits in two places, near the back, or just before halfway down the boat... where would most people put that?

On that little trip, we were sitting on the tubes, would it be better to snuggle up in the middle?
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Old 17 March 2012, 18:31   #7
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Quote:
Originally Posted by BrAinZ View Post
The seat fits in two places, near the back, or just before halfway down the boat... where would most people put that?
I'd put that seat somewhere safe, like the attic

I've never felt secure perched on the tubes while on the plane - but then my tub planes at comparatively high speeds.
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Old 18 March 2012, 03:15   #8
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On the Plane, almost.

2.5 seems a touch small to plane with 2 up. It will need quite a burst of power to lift it enough to plane.
However, Doelfins or similar on the engine might just do it.

It should plane 1 up though, so if you want speedy fun, you could take it out 1 at a time.
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Old 18 March 2012, 07:04   #9
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Planing

My sister has a 3m inflatable with a 5 hp Mercury four-stroke. I managed to get the boat to plane by moving my weight forward. Lacking a tiller extension I did this by lying outstreched on the sponson and steering with my foot - probably not to be recommended for an extended voyage :-)

It works with my son (6) on board as well, but with two adults you need more power to plane. I've already told my brother-in-law to buy a 10 hp instead!
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Old 18 March 2012, 12:32   #10
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Our 2.8m Zodiac (wood floor, V-keel) would plane easily with a Mercury 6hp 4 stroke on it, achieving about 15mph on the GPS with two of us on board.
Our combined weight is about 20 stone, which is not that much, so it depends I guess how much you both weigh.
However I've just sold that engine and bought a Tohatsu 9.8hp 2 stroke which weighs only 26kg, the same as the Mercury 6hp.
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