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Old 10-09-2012, 11:40 PM   #1
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Phantom 21 / 250xs

Hi,

I bought a Phantom 21 last year and just thought I share some experienses with the "Phantom Forum".

I was looking to buy a boat from the Uk but while I was looking this one came along.

The boat is a -93 model I belive, and have not been raced here in Sweden so she is in very good condition for her age.
She is rigged with a Mercury 250xs w sportmaster on a 5,5 inch manual lift, seastar pro steering and Sture Sjöberg foot throttle.

This year Iv'e been testing some different props and engine hights.
Today I'm running the best prop Iv'e testet so far, a B&B Razor3 27p with a shortend barrel.
As we dont get the same kind of seas and swells as you guys do I found that a good hight is propshaft cc 15mm above the pad. This gives me ok holeshot and good top end. With some small chops she runs 75+ knots every time and a bit faster if you put your mind to it and push.

Here are some pics and clips,
http://youtu.be/4PkJOKI1bGI
http://youtu.be/RBKvAscu6mY


/Daniel
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Old 10-09-2012, 11:48 PM   #2
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very nice rig, 85mph is going some!
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Old 11-09-2012, 07:39 AM   #3
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Old 11-09-2012, 08:07 AM   #4
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Fantastic, looks great, all that testing has paid off then.
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Old 11-09-2012, 08:41 AM   #5
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Quote:
Originally Posted by Amund201 View Post
... she runs 75+ knots every time ...
... what gear ratio and revs ?
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Old 11-09-2012, 10:10 AM   #6
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Thanks!

Thanks guys!
I really cant get why theese boats arent more popular over here, I don't know about a lot of other boats you can drive so fast in really most conditions

Sportmaster 1.62
Rpm at 75knots is 5900

/Daniel
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Old 11-09-2012, 11:34 AM   #7
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86 mph

thats quick with a standard 250xs, is that speed from a gps ?
and is the motor standard ?
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Old 11-09-2012, 01:01 PM   #8
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Quote:
Originally Posted by Amund201 View Post
Sportmaster 1.62
Rpm at 75knots is 5900
... 10% calculated slip is
Quote:
Originally Posted by Amund201 View Post
... hight is propshaft cc 15mm above the pad ...
... impossible at that height
... 75mph would match more
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Old 11-09-2012, 01:10 PM   #9
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Quote:
Originally Posted by grandmas denture View Post
... 10% calculated slip is

... impossible at that height
... 75mph would match more

I make it 84mph at 10% slip (93 theoretical)
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Old 11-09-2012, 01:15 PM   #10
... sundowner anyone ?
 
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Quote:
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I make it 84mph at 10% slip (93 theoretical)
... same engine at described height on a p21 ?
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Old 11-09-2012, 01:18 PM   #11
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Quote:
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... same engine at described height on a p21 ?
Just purely from punching the numbers into my calculator
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Old 11-09-2012, 01:23 PM   #12
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Quote:
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Just purely from punching the numbers into my calculator
... me too, thats what im sayin, specified speed needs 10% slip only, but p21 with engine height like descripted will never reach that low slip
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Old 11-09-2012, 01:39 PM   #13
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I don't think the motor is that high with 5.5 inches of setback.I think it would equate to below the pad if bolted direct to the transom.Just my thoughts tho.
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Old 11-09-2012, 01:41 PM   #14
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I'm thinking along those lines as well
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Old 11-09-2012, 01:43 PM   #15
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That'll be 3 of us thinking that then!

Awesome boat
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Old 11-09-2012, 04:23 PM   #16
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The engine is a stock 250xs with just under 100 hours and everything is mesured with gps. I have the Garmin 420 hooked up to the smartcraft speedo as well, this gives me a good view of the fuelconsuption.

I get the slip to 8%.
I have not calculated with correction for the setback, I just mesure the hight as she sits with the setback.

I didn't post here to lie about anything, but we don't have the same swells as you guys do so it's not a problem to go WOT for longer periods of time. And as long as I dont have her rigged to low chinewalking is not much of a problem, just small corrections.

Thats one of the reasons I really like this boat, you can go very fast without the boat wanting to kill you, and you can push it if you want it to be dangerus.
But there is a big differnce with passengers, the boat won't lift as much and it's difficult to get over 73-74 knots.

Some more pics from this winter. Old fueltank and new.
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Old 11-09-2012, 05:22 PM   #17
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good quick hull

looks really nice sat up on her ass end dude, and i dont doubt your speed at all, and as for using the old calculator to work out how fast you own set up goes is FAR FAR beyond me, unless these people are like god or yoda or some extream being that could of been there in spirit working out wind over tide and all that jazz i dont know but fair play you have it going very well.
Been in plenty of phantoms doing over 80 pluss mph, sat in the back of a phantom in holmpeirpoint some 15 odd years ago doing well in the mid 80's mph as a boy driven by the very capable Jb, boats was called martainglass owned by mike shave, was one of the quickest f2's around in the day, and i think im right in saying that the bubbulinhot team had some very quick phantoms, would be nice to see some pictures of them boats again if any one has any about?
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Old 11-09-2012, 08:28 PM   #18
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How on earth could you compare Guernsey's own Paul E to Youda
Hold on a minute though,you might be onto something there !
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Old 11-09-2012, 10:04 PM   #19
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How on earth could you compare Guernsey's own Paul E to Youda
Hold on a minute though,you might be onto something there !
Prop slip app on my iPhone I do have A-Level maths though, although most of those brain cells are long gone...
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Old 12-09-2012, 07:28 PM   #20
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like the garmin with max farts but i suppose you need one of those when you get over 80 in phantom modern electronics, amazing eh!
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