94 Mph

[JamesM]

94 MPH :dizzy:

http://www.boatsandoutboards.com/view/F30221

I reckon my boat must do at least a ton then, 110 down hill ;)

[Jon Fuller]

Dreamers!

[phantomc92]

physicaly impossible

[JamesM]

Maybe its fitted with a Ford speedo ;p;

[Jon Fuller]

Or searay!

[termite]

and another,

http://www.rib.net/forum/showthread.php?s=&threadid=4282

[Jon Fuller]

:D :D :wank:

[JamesM]

That must be nearly 1 mph per hp,

Does a bigger swell make you go faster cause going down a big wave is like going down hill?

So, maybe my estimate of 110 was a little on the low side!!!

I reckon in a 20 foot swell with my 260 hp...................... :dizzy:

[Atlantic Xpat]

'snot 94mph but there is a bloke who reckons on 60kts (thats 66mph for you boy racerz) from 2 x260hp in a 25 Triana. (Nice classic boat though!)

http://www.tmti.net/trianatropica/tropica.htm

EN:drink:

[red bull]

yeah we had a laugh at this
:bang:

[Cyco]

What you mean it won't do this speed:cry:
I've just part exchanged my 300 drag for this rig.

:drain: :drain: :drain:

Cyco

[termite]

Look its true jet boats are faster than those with propellors! who was it that doubted a previous post, honestly experts ha!

T :banana:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2469208794&category=1296

[phantomc92]

nice

[termite]

So is this another 60 mph boat do you think ?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2472209724&category=1296

T :no:

[Burty]

of course it is! any boat on a trailer is as fast as the vehicle towing it!!!!!!
the OCR boys do around 60mph with 1.8 ltr 130hp engines.
so maybe in a large swell, downhill................................;p;

[Jon Fuller]

Well I'm not so sure, a 135hp ford v6/jet in didy speedboat might top 50, and back in 88 a 1.8 OCR B boat ran almost 69mph (Jeff Locock, on Windermere) probably with an old straight six Merc! so it's not completly out of the question.

[Ben]

94 mph possible but unlikely.

Theoretical top speeds can be easily calculated. Just take max revs X(times) propeller pitch/(divided by) gear ratio X .0094976. Multiply by the inverse of prop slippage (typically 75 -85% for a performance type monohull) and there you have it in mph.

Quick note to Essex Navee from a not quite 'Boy Racer' type - 60 kn is actually 69 mph since 1 knot = 1.15 mph.

[JamesM]

Super unleaded, maybe that his secret!!!! :bang:

[Jon Fuller]

Originally posted by Ned
Theoretical top speeds can be easily calculated. Just take max revs X(times) propeller pitch/(divided by) gear ratio X .0094976. Multiply by the inverse of prop slippage (typically 75 -85% for a performance type monohull) and there you have it in mph.


So let me get this right, if I put 40" pitch props on my boat, it'll do 100mph!...shit, If I'd known it was as simple as just adding pitch I'd have done it years ago!:brown:

[Jon Fuller]

Originally posted by Ned
94 mph possible but unlikely.

It would need to be at least 300hp

[RHINO]

I have the fastest Phantom record at Windermere which is 90.62 mph average, Nippon Express A13 PHANTOM 19 with a 280 hp Merc Offshore 1.87 gearbox and Raker 26 prop and I have the RYA certificate to prove it .

[JamesM]

Thats excelent dude, nice one :up:

So 94 mph probably isnt entirely accurate then!!! :D

[termite]

HOW MUCH !!! :jaw:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2474326738&category=1294

Thats over 4 grand a metre

[termite]

Hmm

[JBP]

How come the 90.62MPH is not posted in PB1/2004 then?

[Cookee]

I could be wrong but I don't think a Phantom 19 with a 2.5 EFI fits into an RYA class!

And I happen to know that he did do that speed as well!

Congratulations - in your first post you have almost called someone a liar - good start!

[Jon Fuller]

John, is OCR 'X' not an unlimited version of OCR 'A'? I'm not arguing, I genuinly don't know, but had a feeling there was something like that at one time.

[Cookee]

No there has never been an unlimited OCR class - X class is the old 2 litre and A class is now the old B class which is 1.8 litre - got that?

If you've ever watched an OCR race you'd know why they couldn't have an unlimited class - they are all nutters - I know I used to navigate in a 2 litre phantom 18!

Confusing isn't it!

[Jon Fuller]

Yeah, clear as mud! another luvvly bit of RYA work no doubt!

[Cookee]

It would be great to be able to blame them but it was an OCR decision based on the fact that XR2's are being (have been) phased out - they needed a new "A" class but they couldn't just tell everyone with XR2 engined boats they couldn't race anymore - hence the "A" and "X" designations.

Hope that makes it a bit clearer!

[Tony Davis]

Originally posted by Cookee
No there has never been an unlimited OCR class - X class is the old 2 litre and A class is now the old B class which is 1.8 litre - got that?



You sure about that Cookee, I thought the X classification was used for Experimental. If what your saying is true, how could he set a record in 2 litre with what appears to be a 280hp 2.5efi???

[Cookee]

Tony - That's the point! It is why it isn't in PB1 as a record as it doesn't fit in any class and it wasn't a record - at least officially anyway - but they will give you a certificate for anything.

I think it was you with JF that got the certificate from Windermere with the extreme wasn't it?

I was trying to keep it as simple as possible but actually "A" class is the experimental one - I think for another year - and "X" class is the "Ex" 2 litre class.

I think my head is going to explode! :dizzy:

[JBP]

I wasn't callin any 1 a liar, just me being nieve. Suprising what can be done in phantoms then.

[RHINO]

The certificate I received was a 'Index of Performance' as an OCR boat with a 280hp. It did not fit into any class. If I knew how to post a picture I would post the certificate I received. The previous holder was 'British Airtours' in a 20' Phantom. When OCR 'A' class raced Internationally, we had to use an 'X' prefix instead of an 'A' according to UIM rules. I think that should clear things up.

[RHINO]

I would like to add that we had a lot of fun getting that speed as things were really happening fast. What really made me laugh was seeing a lot of officials running down the pontoon saying an OCR boat couldn't go that fast.They thought it was a 2ltr ha! ha!This year I might try the same motor on my batboat . Any volunteers?

[Cookee]

You're on your own mate! Wassamatter won't the wife get in with you?

[JamesM]

Dude, how fast was the previous record by the 'British Airtours' Phantom 20 and what motor did it have?

[JamesM]

Originally posted by JBP
Suprising what can be done in phantoms then.

Normally you lot don't need much encouragement to make crude, sarcastic, amusing and witty comments, so quite honestly I'm dissapointed that you all missed this one!!! :down:

;p;

[jw.]

Nah. Far too obvious for the sophisticated repartee of Boatmad.