5M to 6.5M Ribs - Speed Survey

[Andre]

Parker 630 - Diesel, Mercruiser 1.7 (120HP) WOT 4400 RPM, 1 person - me , half a tank of fuel say 60 ltrs, calm water > 36knots

[matt h]

Flat out one person on Board 50 ltrs Fuel 36 knots, two persons, 33 knots, four on board, 31 knots, will burn 45 litrs heavy use in 7 hours, Great boat !!

[Hightower]

BWM Deepsea 17 with 90 merc Four stroke. One up and 60 litres with a heavy load. 19" prop Max was 41 knotts but hole shot was crap. With a 17" prop Max of 38.5 knotts but would have to say that with reliability that 36/37 knotts was easily achivable.

Bruce wouldn't cruising speed at 4000 RPM be more constructive?

[le_forban29]

Narwhal HD 580 and Tohatsu 90 TLDI, 13x19 Yam prop,

39kts averaged (38.5 and 39.5 back), driver only, 40 liters fuel, pretty calm sea.

Usually 37kts@5600 RPM with 2 or 3 on board and chop.

[ribit]

Ringrib, purchased one of the first ledgand ribs end of 97, on invoice and, on display sticker it said 6m however when measured it turned out to be 5.85, where is my .15 I would like to know? anyway already owned a freshly rebuilt xr2 that had achieved over 80mph on a 27ft boat, so I thought what the hell, I will use that and as this boat is only around 6m I will be happy if it only does a 100mph. A mate after driving mine purchased an identical rib and fitted a yam 130hp with 2 up and half fuel he has reached 59.3mph on GPS but it hits the limiter, but he has got many stainlss props to play with, he recons this year he will get over 60+, one thing at part throtle it still goes well with amazing economy for speed, where as the xr2 drinks like a fish!!!

[ADS]

Not a Rib, but same similar size and a popular hull.

Ring 15ft Speed Boat
70HP Tohatsu 5500rpm
38-40 knots more to come though

[brucehawsker]

More please, these results serve to confuse as well as enlighten. The more data the better.

Thank you so much

Bruce

[Carl]

like the above,not a rib,but a well used hull(extreme). will keep you informed

[The Edges]

Ribcraft 5.3 mariner 90HP S/S 18 prop 4 st 2 up + half tank WOT = 39kts

[Davidgriffiths]

New Ribcraft 6.5 with 175hp Suzuki, 23pitch SS prop, 140litres of full and three people on board 45knts WOT.

[Chris C]

Tornado Viking 5.4 Mercury 90 2T 20" Lazer 2 Two persons 50 litres fuel 37 Knots

[RIB BOI]

6.25 Ribeye 150 yam hpdi. full tanks two up 47knots up and down tide. one up not much fuel lots of trim and 55knots but not streeing as no boat in water


RIBBOI

[Andy_Rs600]

Ribcraft 6.3 150 Opti 13.5" x 17p

39.6knts 2 up, but quite a bit of working kit lives aboard

[ian parkes]

Honda 3.8 sib 20hp 2 fat bastards and a kid with lots of gear 18 knots anyway
1up never flat enough to try it

[andrew.adamson]

Rogue Wave was at 42 knots on my heavty boat with me paying for the fuel, what a mug am I!! Two up and only at 5000 revs and more to come.

[Colin F]

6.5M ribcraft 36knots, 2 people and 100L fuel. Prop 4 blade ally 21" pitch. max rpm 3600.

needs re-propping to get 4000rpm

Diesel inboard for those that missed my profile

[borat]

Ribtec 535, Twin Mariners 40hp, 60 Ltrs Of Fuel, 2 Adults Up, Force 1....... Speed 35mph.

[Bigmuz7]

Northcraft 6.3m 4 up 14 gallons fuel, 400 rpm left to go Mariner 150 opti... Here are the guages, .... oh and it was raining.... damn that hurt

[ADS]

Originally Posted by Bigmuz7

Northcraft 6.3m 4 up 14 gallons fuel, 400 rpm left to go Mariner 150 opti... Here are the guages, .... oh and it was raining.... damn that hurt

Is that in MPH or knots?

[stedj]

Originally Posted by BogMonster

that's interesting - hell of a lot faster than mine for similar size/hp!

be interesting to see how mine goes with coarser prop on - maybe I should have gone for a 21 if you are running a 23 - how well does it go?

it goes fine reves to about 5400 and handles well i prefair it to my 19 pitch ally prop but im no expert