How Fast Is Your Boat? - Page 4

Under the Thumb · 01 December 2006, 08:17

Northcraft 5.5, 150 Optimax, 54Kts 3 up. Uses about 40-45l per hour flat out

Goes as fast on the water as it does on the motorway behind the Range Rover

MarkM · 01 December 2006, 11:32

With 100 liters and 2 people: 98 km/hr.
With 300 liters and 2 people: 95 km/hr.

Aidan · 01 December 2006, 17:55

Quote:

Originally Posted by MadMat

You might be surprised. Many jet engines will run on diesel.

Hi, yes the jet engines can use diesel but I believe Kerosene has a higher calorific or octane type content so per weight its better for flight. This is I believe its so explosive as you couldnt ignite a pool of diesel with a blow torch.

See those Diesels, seem to recall them being a two stroke diesel unless I am dreaming.. looked like a pair of Pigs to be honest, sorry Tohatsu..

Aidan · 01 December 2006, 17:58

Quote:

Originally Posted by Bigmuz7

Have posted this elsewhere on this forum. 8.5 Hull 275 Verado 2 up full tank 63 mph trimmed to the limit, but motor still had 500 rpm to go if I had the right prop, but tbh, I dont think it would go that much faster if I had the revs. Sea wasn't flat calm on the day either, mind you I lost two caps and me wig hehe

Hi Bigmuz, woz that your wig, I thought it was a Swimming Beaver...DO you want it back?

codprawn · 01 December 2006, 18:13

Quote:

Originally Posted by Aidan

Hi, yes the jet engines can use diesel but I believe Kerosene has a higher calorific or octane type content so per weight its better for flight. This is I believe its so explosive as you couldnt ignite a pool of diesel with a blow torch.

See those Diesels, seem to recall them being a two stroke diesel unless I am dreaming.. looked like a pair of Pigs to be honest, sorry Tohatsu..

Kero isn't exactly easy to ignite either - especially on a cold day!!!

prairie tuber · 01 December 2006, 18:42

Quote:

Originally Posted by Aidan

See those Diesels, seem to recall them being a two stroke diesel unless I am dreaming.. looked like a pair of Pigs to be honest, sorry Tohatsu..

The diesel ouboards that I've heard of are from Yanmar, Ruggerini & Zongshei. Very hard to find any info on the ones from Zongshei.

Bigmuz7 · 01 December 2006, 19:56

Quote:

Originally Posted by Mennojsh

150 vmax hpdi yamaha 2.6 ltr
5.8 tornado old type narrow one Cmc power lift as high as possible engine as high as possible on lift 280s k-planes mounted too be save
71 Knots 28 pitch mercury chopper prop
engine is in rev limiter over 6200 rpm

That'll be an engine rebuild soon then ?

Bigmuz7 · 01 December 2006, 20:04

Quote:

Originally Posted by Aidan

Hi Bigmuz, woz that your wig, I thought it was a Swimming Beaver...DO you want it back?

Hey, I hope it didnt foul your prop ... oh it did... well any of you guys need beard augmentation?

NautiAndNice · 15 January 2007, 19:17

In response to some of your PM's/queries:

Got 43kts (~49.5mph) out of my Ribcraft 750 Sport + Suzuki 250 yesterday. Had fullish fuel load (~200l) + 4 ppl + gear on board.
Still had 1000rpm to go, but outlaws were starting to look a bit twitchy in the back, so stopped at that.

badbaws · 15 January 2007, 22:02

I have so far got 31 knots by GPS in flat calm no tide. I expect a little more once the engine is run in.. also I am going to change the prop to a more sporty one... I am expecting 35-40 knots eventually.
Of course my boat only cost £4500.. as oppossed to the larger boats which only give you maybe 10 knots more.. You want to get a thrill take a 4m boat out in the rough stuff!!

118118 · 16 January 2007, 00:11

40.8kt
5.4 millitary searider, 75 yam 2 stroke

very fun

andyxs · 16 January 2007, 23:13

sammo ya silly idiot its a 7m xs with a 200 opti and it can do 59 in the flat just befor the chine wobble throws ya out of the boat.

Jono Garton · 16 January 2007, 23:19

Quote:

Originally Posted by andyxs

it can do 59 in the flat

Is that on the flat of a motorway behind the car

ian mcconnell · 17 January 2007, 08:09

5.4 mod searider, 1 person, 45ltrs fuel, not a standard searider (carrying extra weight) 90hp yamaha.titan 17" stainless prop 39.8 kts

Nos4r2 · 17 January 2007, 10:12

Quote:

Originally Posted by ian mcconnell

5.4 mod searider, 1 person, 45ltrs fuel, not a standard searider (carrying extra weight) 90hp yamaha.titan 17" stainless prop 39.8 kts

Takes off like a rocket too-I was rather impressed on the 16/12 cruise.

andyxs · 17 January 2007, 18:39

Quote:

Originally Posted by Jono Garton

Is that on the flat of a motorway behind the car

nope thats with just me n bout 25l of fuel and a mill pond at 7pm in pwllheli. was trying for 60 but hit a wake n nearly got thrown out of the boat. real brown trousers lol

Devon Powerboat · 17 January 2007, 19:02

My 6.5m Ribcraft with a 175hp suzuki outboard will do 45-46 knots with just me and 39 - 40 with 12 adults onboard.

John

www.devon-powerboat-training.co.uk
www.devon-rib-rides.co.uk
www.devon-rib-charter.co.uk

andyxs · 18 January 2007, 14:07

thats a heluva lota stuff on ya aframe hope its bolted on well lol. was thinking of doing something similar to mine but i like the speed. and the wakebaord rack already struggles no mater how tight i put it on it always trys to swivle round.

ian mcconnell · 18 January 2007, 16:21

thanks for your comments above, strangly enoth i also commented on how quick your 4m was, i use to have one with a 50yam which managed 34knts maxed out 1 up, you were keeping up with the 3 of us at 39knts..

thats one healthy engine youve got.

Biggles · 18 January 2007, 16:34

Ian,

I was also mighty impressed with your boat that day. Seems like a 5.4 m Searider with a 90 on the back is a pretty good boat.