how fast is your rib?

[rocknrolla]

Originally Posted by Hysucat

Mmmm .... is that all, I was just getting into it.

This was a standard boat and engines, the only modifications were the gearboxes and props.

8m Hysucat - 2x 200 Mercury's (Standard), bullet nose racing gearboxes, low level water pickups, surface piercing props.

74knots / 85mph / 137kmph on final day of testing. Pretty sure it can make 80knots with jack plates on the transom.

Hysucraft - Evolution Evolved. - Official Website - Designers & Developers of Hydrofoil Assisted Craft.8m RIB

I guess Cooke still beats me with his Malcolm Cambell setup

Mmmm is that all 100 mph A55 TRUSTY 110 XS KING CAB,AND IT STIKS AT IT

[Hysucat]

Originally Posted by rocknrolla

Mmmm is that all 100 mph A55 TRUSTY 110 XS KING CAB,AND IT STIKS AT IT

What is the full specification of the boat you are describing ?

That sounds more like a truck .... than a boat.

[rocknrolla]

Originally Posted by Hysucat

What is the full specification of the boat you are describing ?

That sounds more like a truck .... than a boat.

Thats on the trailor son,behind a landrover osprey vipermax 7.5

[Hysucat]

Originally Posted by rocknrolla

Thats on the trailor son,behind a landrover osprey vipermax 7.5

That's cool, I've managed to get the same figures for the 8.5m Hysucat towing it behind the Jeep.

What size engines you running on the Osprey ?

[Crezzlin]

I have a 5.6M Osprey with a 90's 135Hp Murcury V6 2 stroke, only been out on a good day once since getting it, on the looks it was going 47mph but need to try Gpu next time..

Can anyon link me to a prop that will increase speed if possible, thanks

[kubcat]

Originally Posted by kubcat

Okay, the Ribtec 890SX with twin Yamaha diesel sterndrives 240hp ME421 sti's hit 58mph / 78kmh today.

Just realised my typo. 78kmh is 48mph. Thank you for being polite and not calling BS.

[johndoe007]

Mine goes 48mph especially when it's being chased... I'd never call bs

Sent from my iPhone using Rib.net

[kubcat]

Originally Posted by johndoe007

Mine goes 48mph especially when it's being chased... I'd never call bs

Sent from my iPhone using Rib.net

Sent from my iPhone using Rib.net[/QUOTE]


Thanks johndoe007, it was just that I originally wrote 58mph but had just converted wrong from kmh.

Now if I had a pair of your 315hp's I might get a bit closer.

[simsy]

31.7 knots on sale water park, trimmed up on the edge of ventilating ....... 30hp Efi twatsu... 10 x 12 inch solas s/steel prop...

[arcticpuffin]

Just tried my SR5 with Suzuki DF90. Got 39.8 knots, but The engine overreved with the original 19" propeller. Will probaly get some more knots with an optimum propeller

[Alanpatt]

First time out this morning on my Sr5.4, 90 mariner, got 34kts before I bottled it over the white horses.....poof! Haha! Loved it

[kubcat]

Just finished my first 3 hours on the brand new 90hp Tohatsu and could finally go WOT for a minute every ten. Prop is a 13.25 x 17P Stilleto (stainless 3 blade). Might need a little less prop or perhaps the engine is just too tight. RIB is an aluminium Dockitjet 5.6.

[arcticpuffin]

Today i touched 40 knots on my Avon Searider SR5 with Suzuki DF 90 and original 19" propeller. Have to trie with 21" because I think it is more to get..

[Mollers]

Originally Posted by arcticpuffin

Today i touched 40 knots on my Avon Searider SR5 with Suzuki DF 90 and original 19" propeller. Have to trie with 21" because I think it is more to get..

I wouldn't count on it. 40knts is about your lot for a 5.4.

[Davidlan]

I have not had this Rib long and may not be the fastest but it is enough to get out and about in.
Highfield 3.6m with Honda F20
Calm seas with 2 people 19 kts.
Slight chop and swell with 4 people 17 kts.
Cruising between 11 and 14 kts on the plane.
When the waves return I'll take some more GPS tracks

[arcticpuffin]

Originally Posted by Mollers

I wouldn't count on it. 40knts is about your lot for a 5.4.

But with 19" the engine overrevs and reduses power momentarely. Just have to trie :-)

[TonyC]

Just sea-trialled our new (2nd hand) Delta 650x with Twin 90hp 2 strokes.

Got it up to 39kts, 2 up with 200ltrs of fuel onboard.

Got about 26 kts on a single engine.

[kubcat]

Originally Posted by TonyC

Just sea-trialled our new (2nd hand) Delta 650x with Twin 90hp 2 strokes. Got it up to 39kts, 2 up with 200ltrs of fuel onboard. Got about 26 kts on a single engine.

Pretty impressive result with the single engine.

[boristhebold]

Originally Posted by arcticpuffin

Today i touched 40 knots on my Avon Searider SR5 with Suzuki DF 90 and original 19" propeller. Have to trie with 21" because I think it is more to get..

Anyone from the UK like childish humour / (stupid question) take a close look at the picture and what the dials are labelled .... along the lines of a windy bottom LOL ... I mean look at the image of the guage from articpuffin post number 153.

[colcreate]

Originally Posted by Mollers

I wouldn't count on it. 40knts is about your lot for a 5.4.

Tend to agree, 40 knots = 46mph. Had 47mph SOG indicated out of my SR5.4 running a 21" P stainless prop at something like 5,500RPM.
Couple of points though:
1. Can't maintain anything much over 44/5mph as it becomes ehm "exciting" and I either have to throttle back or steer slightly to one side.
2. How the hell do you take a clear photo of the instruments at 40 knots plus?!
I can't even read my tacho accurately at that speed, although I haven't had a flat calm day yet.