Top speed DF140 / RC585

[Bucksribster]

Picked up my new (to me) Ribcraft 585 yesterday, and went for a spin

I absolutely loved the boat, especially the way it handles. Just one question I am hoping a Ribnetter can help me with.

It has a Suzy DF140, which has just been serviced, and seems to run very well. However when I went to WOT, it seemed to top out at around 33 knots / 5500 RPM. Admittedly it was a little choppy (when isn't it in the Solent?), and I may not have not got the trim right, but I was a little disappointed.

The prop is a new-looking ali 3x14x21. From the engine manual it looks like I should be getting another 500 to 1000 rpm at the top end.

So my questions are what props to others use with the RC585 / Suzi 140 combo, and what sort of top speed do they get?

[whisper]

Mine was 40

[Maximus]

Originally Posted by whisper

Mine was 40

Well tell him how it was propped then!

[whisper]

Originally Posted by Maximus

Well tell him how it was propped then!

It's a secret

A standard Ali prop was 40

I then used a Suzi SS 21" prop which gave 42 ish

But AJ. has a 4 blade Ali which is awesome, it really grips on the turns and produces 40 too

There is a race somewhere on video, I'll dig it out....

[Bucksribster]

Thanks for this.

Do you know what pitch they were?

[whisper]

No but I'll ask AJ.

Video here, you'll see how fast the blue rib picks up, although I did have me and Nos on board :

https://www.youtube.com/watch?v=uDOqygi7NrU

[Maximus]

Originally Posted by whisper

No but I'll ask AJ.

Video here, you'll see how fast the blue rib picks up, although I did have me and Nos on board :

Good Day!
Nos is a bit a of err....um...a "Negative Factor on the Performance"!"??

[A1an]

Dunno if this helps...

[pow2gran]

This is a test report with the 140 and is the same set up as I have. I have found it pretty accurate.

http://www.suzuki-marine.co.uk/docs/...0-%20DF140.pdf

The fastest I have had is 42 knots with the tide. It is perhaps a tad slower than the new Ribquest 650 super sport with a 175hp.

[pow2gran]

I was pipped at the post😀

[whisper]

I used to use this:

http://www.suzukimarine.com/~/media/...llers_PDF.ashx

[mal99]

We have the same boat/engine combination. Standard 3x 14 x 21 Ali prop gives around 40 kts.

[parm]

mine with a 23inch prop will do 42/3 kts

[whisper]

AJ says its a 13 x 21 solas 4 blade SS but he will check

[pow2gran]

So how many RC585 with Suzi140s are there?

[Bucksribster]

Thanks for all of this. Sounds like it may be correctly propped for around 40 knots, so I guess it may be trim, or an engine issue.

[Nos4r2]

Originally Posted by pow2gran

So how many RC585 with Suzi140s are there?

Almost every one of them

[Bucksribster]

Originally Posted by pow2gran

So how many RC585 with Suzi140s are there?

Could we go for world domination?

[Nos4r2]

You'd have to have one with a 150 Opti on that was your 'Davros'

[Bucksribster]

Originally Posted by Nos4r2

You'd have to have one with a 150 Opti on that was your 'Davros'

Yeah, but can they go up stairs