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Old 07 April 2011, 21:41   #1
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Old 07 April 2011, 21:46   #2
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http://www.rib.net/forum/showthread.php?t=40661

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I am reluctantly selling my newly commissioned Osprey Vipermax 6.2 with a Mercury 100 Efi due to moving abroad
I think we all know the real reason why he's selling up!
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Old 07 April 2011, 21:55   #3
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Do we??...
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Old 07 April 2011, 22:03   #4
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Do we??...
Yes.
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No seriously, I will upgrade one year. To a 200 I think
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Old 07 April 2011, 22:10   #5
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Since when did Andy have a Merc on his transom
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Old 07 April 2011, 22:21   #6
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Since when did Andy have a Merc on his transom
Since he moved to wales I guess
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Old 08 April 2011, 01:10   #7
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I think Gotchi is saying it's somewhat underpowered.

Somehow I think he'd change the engine before the boat though.
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Old 08 May 2011, 16:21   #8
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If you don't have anything factual to say don't say it. If you are an idiot keep your mouth shut. Forum's are supposed to be supportive!

I built this RIB for efficiency and long distance cruising.

I have just returneD from a 150 mile cruise in the Bristol Channel and never once was I under powered.

Planing is at 3,000 RPM, cruising speed is 24Kn at 4,000 RPM and top speed recorded at WOT was 39Kn. More than enough for me and very difficult to use WOT on the sea in a F5!

By the way, fuel consumption is very low...the mots important thing to me.
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Old 08 May 2011, 16:23   #9
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I forgot to mention...my house has just sold and I will be living in Michigan USA from June
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Old 08 May 2011, 16:44   #10
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Good luck with the sale, and with the move to the USA; I hope it all works out well. Great boating on the Great Lakes!

Ian
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Old 08 May 2011, 18:06   #11
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If you are an idiot keep your mouth shut.
Well I'm more than an idiot so there

(Another plug for the Osprey Owners Association...... - not connected to me in any way)
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Old 08 May 2011, 18:14   #12
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Well I'm more than an idiot so there

(Another plug for the Osprey Owners Association...... - not connected to me in any way)
Ah an admission then never a true word spoken
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Old 08 May 2011, 19:35   #13
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Planing is at 3,000 RPM, cruising speed is 24Kn at 4,000 RPM and top speed recorded at WOT was 39Kn. More than enough for me and very difficult to use WOT on the sea in a F5!
I'd like to know your secret in getting 39 knotts out of a 100hp on the 6.2 please?
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Old 08 May 2011, 19:40   #14
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I'd like to know your secret in getting 39 knotts out of a 100hp on the 6.2 please?
How fast is yours with the 150 Andy?
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Old 08 May 2011, 19:56   #15
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How fast is yours with the 150 Andy?
...and he means on the water, not the M26
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Old 08 May 2011, 20:16   #16
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How fast is yours with the 150 Andy?
As a bare boat with no stainless on, no seat bases and minimal equipement the fastest I had was around the 42kn with a 21" Viper on. But with all the kit on board, full tanks, stainless etc I can reliably get 38kn's using a 19" Viper prop.

I'm more than happy with the performance, but always thought it should have acheived just over 40kn's. I'd love to try a 17" prop and see what that does as there's another 250rpm to max out WOT
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Old 08 May 2011, 20:19   #17
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...and he means on the water, not the M26
With a piece of kit I'll be recieving soon, I'll be able to tell the outboard it's a 300hp and get over 60kn's
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Old 08 May 2011, 20:26   #18
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I'd love to try a 17" prop and see what that does as there's another 250rpm to max out WOT
37kts I'd guess.
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Old 08 May 2011, 20:35   #19
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37kts I'd guess.
Quite possibly!

However after I started adding weight the performance of the 21" dropped down to 35kn's and started to bog down when accelerating. It was funny as WOT didn't seem to reduce with the speed, indicating more slip was to blame. I clawed the speed and acceleration back with that 19" viper you found for me on ebay and it added 250 rpm to the WOT which is now midrange at 5000 rpm. I've always been curious what a 17" would be like, but I haven't found one at the right price.
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Old 08 May 2011, 20:39   #20
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Keep searching - you can never have too many props.....


...or RIBs,....


.... or outboards.

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