70knots, I think not!!

Islander · 10 July 2003, 19:56

Perhaps if you dropped both those Ballistics in question out of a plane I don't doubt they would do more than 70Knots but not on the water!! Believe me I know!

Dirk Diggler · 10 July 2003, 20:04

Maybe "Chris Murray" is the English translation of MANOS!

-<=[Tw18]=>- · 10 July 2003, 20:10

Quote:

Originally posted by Dirk Diggler
Maybe "Chris Murray" is the English translation of MANOS!

*cough*
i wrote that

Don't try giving someone else my limelight

But yeah I thought 70kts was OTT but thats what the sale speech says

Chris Murray · 10 July 2003, 20:35

It's not as outrageous as it sounds ... really!

Based on GaryGee's recent info, the 7.8 Offshore (which is a heavily-built boat) does about 34 kts with a 240 HP inboard diesel (might be 230 HP).

While I appreciate that this is perhaps a little under twice the weight of an outboard of equivalent power output, I doubt that a 225 HPDI would produce more than say 45kts. However, I have no doubt that higher speeds would be achieved on lighter RIBs of the same length and beam.

Given that the 225, 250 and 300 HPDI engines are exactly the same weight and have the same cylinder block, I should have thought that there would be no difference in fuel consumption at cruising speed (say 35 kts). I would therefore suggest that "economy" at cruising speed is not really an issue, when considering these engines.

On this basis, what is the point in limiting the top speed (not to mention the acceleration) by going for the lower power output?

Manos - What a great chap!

Regards,

Chris.

Cookee · 11 July 2003, 09:04

Oi you lot stop Manosturbating or you'll go blind!

Manos · 11 July 2003, 09:11

Hey people have you found where excatly the sea is located in the UK yet??
You may put your so called 'boats' in it one of these days (if you find where exactly is that is)

dgpw · 11 July 2003, 10:05

ISLANDER I garentee that you could tow them at more than 70!

. In my opinion you could do with a longer boat than 8 meters with twin 225's on. They are very heavy. I think twin 175 would be more suitible. I think you would find it a very skitish ride at 70 in an 8m. Hitting 70 knots is possible though. would compleetly depend on the engine set up, ie hight, jacking plates how close together, props ect. o and most importantly when the helm bricks it!

stuart hedges · 11 July 2003, 16:58

I think the chance of getting 70knts out of a 7.8 Ballistic is about the same as finding a RIB in a box of kellogs cornflakes.

crazyhorse · 11 July 2003, 17:09

Dirk Diggler · 11 July 2003, 17:34

Quote:

Originally posted by H2O Events
is about the same as finding a RIB in a box of kellogs cornflakes.

Don't tell Manos that, he's still hoping.

Manos · 11 July 2003, 17:56

Hey Drik discovered where the sea is in the UK yet??

Dirk Diggler · 11 July 2003, 18:19

Yeh, I have actually, it's about 50ft from my patio, and not a gayboy in site! How's George?

dgpw · 14 July 2003, 15:50

Quote:

Originally posted by H2O Events
I think the chance of getting 70knts out of a 7.8 Ballistic is about the same as finding a RIB in a box of kellogs cornflakes.

Why do you say that Stuart as you can get 50 knots easy out of a un-tuned standard engines with ought jacking plates or high speed props. On test they had 58 MPH out of a single ficht 225, that is basically 50 knots. The following is a quote from a review of the boat and I have no reason to think it untrue.

Quote
This Ballistic, though not a large boat, really does maintain a very high degree of stability at speed though a careful and experienced hand on the throttle is required at all times At 70 mph there is life margin for error and an ability to read the sea and anticipate quickly is vital. This outstanding performance is delivered courtesy of the twin Johnson Ficht outboard engine rig, which I have to say, delivers admirably. This particular boat has been clocked by Steve Brown at 74 mph.

With ought Jacking plates and the right props you are going to only be able to do the top speed of the engine moving water.

Did you have a good birthday Stuart?

stuart hedges · 14 July 2003, 16:41

74mph is impressive and suprises me but it still isn't 70 knots. I would imagine to get that speed they were set up pretty well. Our Ballistic would only do 50 knots with twin 225 Opti's which we tried all sorts of props on. A boat can only reach a certain speed sometimes whatever you do to it mainly becase of length and I think 74mph is probably that speed. Wherever the write up came from I think is wrong anyway as Im pretty sure Johnson Fichts don't exist.

Anyway yes I did have a good b'day thanks. Why did you go to Weymouth.

dgpw · 14 July 2003, 22:43

Andrew wanted to to see Jenny so him and Jilly went. Good run though you are right that boat is a lot less powefull than the 225. Amazing what a difference 25hp makes. do they have similar props? took just over an hour each way. which is not bad for just over 40 miles.

Good spot on the Johnson Fitch, I had not noticed that. The artical is the one from the Balistic web site but it is an external test. Did johnson make a fitch before they joineed evenrude, does anyone know I have never heared of one either.

stuart hedges · 15 July 2003, 12:59

What Gilly went all the way to Weymouth by boat aswell.

1 hours is bloody good, was nice weather tho, you should have called in at Poole and said hi.

Johnson didn't make a Ficht

dgpw · 15 July 2003, 13:17

Yep I was shocked as well I think she wanted to see jenny and her friends I think not sure. Appart from afew overfalls It was flat calm. Would have called in thought I thourght your sister took you somwhere for your birthday? excuse the spelling I cant today!

stuart hedges · 15 July 2003, 13:19

Lots of us went camping for a night but that was it, was on the water the rest of the weekend.

dgpw · 15 July 2003, 16:43

sounds good, I would have given you a call if I had known. Nice run to waymouth.