How Deep is a Deep V ?

Richard B · 16 September 2002, 21:18

How deep is a deep vee hull?

I mean, how do you measure it? And at what point does a "shallow vee" become a "deep vee"?

Would you measure the angle at the transom? And is it relative to the LOA, or absolute?

I ask this because I hope to soon be in the market for a (probably 2nd hand) 6-ish metre RIB and would like to understand more about the hull spec. Also, in conversation today, Mr Burns (aka Flanker) suggested sending me a picture of the RIB he has decided to buy for my judgement of whether it's a deep vee. Of course, I wasn't qualified to comment!

Sorry, Pete!

Also, I've been in a Valiant DR600, and found it banged more than a Ribtec585 - was this because of the hull shapes, or because I was solo in the Ribtec, but 4-up in the Valiant?

And, I suppose there's a limit to how deep a Vee can be - 'cos otherwise you'd never get on the plane?

Flanker · 16 September 2002, 21:40

It's v difficult to tell

pete

Pete7 · 16 September 2002, 21:41

And to make life even more confusing there are warped deep V hulls. Osprey Viper for one. See Renes pics in the gallery. They start very deep and then change to just deep V. some have planning pads which makes a big difference getting a heavy dive boat up on the plane, and raising the transom height so the boat doesn't poop when stern on to a wave. Others just straight V. Ribtec and Deltas are straight through deep V. That didn't help much really did it. Think deep V is about 18 - 23 degrees at the transom. Have a look at some of the American amateur boat building sites for angles of difference hulls. Eg Bass fishing boats for calm flat water and the need for speed seem to be about 12 degrees. Pete

Richard B · 16 September 2002, 21:45

Quote:

Originally posted by Pete7
They start very deep and then change to just deep V

But don't they all do this - ie bow very "sharp" and flattening towards the stern?

Quote:

Originally posted by Pete7
That didn't help much really did it

Yes it did - I'm just gonna buy a Ribtec or a Delta to keep it simple!

Pete7 · 16 September 2002, 22:02

No not necessarily, think about avons for example.

Daniel · 17 September 2002, 01:54

I don''t think the Valiant DR600 is a deep V.

Mr Burns - i think the tohatsu on its way to you is a deep V - BTW is it a 6.1 or a 6.6 - time you filled in your profile sir!

My boat is def. a deep V, i might measure it one day!

Daniel (don't think i'm quallified to judge really either) Hawkes