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Old 19 November 2008, 15:28   #1
Country: Australia
Town: Australia
Boat name: Independent(Liberum)
Make: Avon SR6
Length: 6m +
Engine: Twin 90hp E-Tec 2007
Join Date: Oct 2007
Posts: 58
Avon SR6 ReMotored 2*90 etec Prop Test outcome

Hi All,

Recently put my boat through refit, including repower.

Last Week Tested 3 prop types all 17" being

SST, Viper and the new 4 blade Rogue

Findings below

I adjusted load, and in .5m at WOT

Viper -

Rides Bow Up. No Room to Trim up, had to keep it in.
Mid Range - Have to keep the Revs Up hight to maintain minimum Plane Speed.

Best Prop to Suit. Plenty of Trim Range.
Mid Range Better than Viper, brought down a few hundred Revs to plane.
I reckon this will zoom zoom zoom on a flat calm day.

Rogue -
Similar to the SST - more Trim Range than the SST
Mid Range - No real Difference to the SST, maybe 100rpm below SST for
minimum plane.
Out of Hole REAL ordinary compared to the Viper and SST.
Top End Similar to the SST, possibly a bit more speed.

Note: On my setup I was expecting a couple hundred of extra revs from the SST compared to the Viper, but it did not show. The 17" seems a good fit. I was expecting to have to go to the 19" to bring the revs back a couple of hundred. I was expecting the 17" to bring me upto 5400 at WOT.

Only concern Is when I drop a lot of the weight that I was carrying for the test. It reflected equivalant of 4 Divers and Kit, but there will be times when carrying a lot less than that. so It may rev up to 5400-5500rpm or there-abouts on those occassions at WOT.

AT WOT, all were within a couple of kms of each other. All in the high 60kmh range.

On A Flat day I expect the SST or the Rogue would bring me over 70kph.

My view is that the Rogue are not offering as much as I hoped and therefore the tired but proven SST wins out, + I don't cough up the difference in $$.

For everyones information.
mr_sav is offline   Reply With Quote

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