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Old 26 April 2015, 13:46   #1
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Top speed DF140 / RC585

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?
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Old 26 April 2015, 14:08   #2
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Mine was 40
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Old 26 April 2015, 14:12   #3
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Mine was 40
Well tell him how it was propped then!
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Old 26 April 2015, 14:23   #4
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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....
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Old 26 April 2015, 14:28   #5
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Thanks for this.

Do you know what pitch they were?
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Old 26 April 2015, 14:33   #6
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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 :

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Old 26 April 2015, 14:54   #7
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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"!"??
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Old 26 April 2015, 15:07   #8
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Dunno if this helps...

Click image for larger version

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Old 26 April 2015, 15:13   #9
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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.
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Old 26 April 2015, 15:14   #10
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I was pipped at the post😀
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Old 26 April 2015, 15:15   #11
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I used to use this:

http://www.suzukimarine.com/~/media/...llers_PDF.ashx
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Old 26 April 2015, 15:32   #12
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We have the same boat/engine combination. Standard 3x 14 x 21 Ali prop gives around 40 kts.
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Old 26 April 2015, 15:37   #13
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mine with a 23inch prop will do 42/3 kts
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Old 26 April 2015, 15:49   #14
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AJ says its a 13 x 21 solas 4 blade SS but he will check
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Old 26 April 2015, 16:31   #15
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So how many RC585 with Suzi140s are there?
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Old 26 April 2015, 16:32   #16
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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.
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Old 26 April 2015, 16:36   #17
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So how many RC585 with Suzi140s are there?
Almost every one of them
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Old 26 April 2015, 17:09   #18
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So how many RC585 with Suzi140s are there?
Could we go for world domination?
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Old 26 April 2015, 19:26   #19
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You'd have to have one with a 150 Opti on that was your 'Davros'
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Old 27 April 2015, 03:50   #20
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You'd have to have one with a 150 Opti on that was your 'Davros'


Yeah, but can they go up stairs
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