benniejordaan
Sealiner
500kg doesn't seem light for 16'?
Hi I can buy a Ace Cat 550 For R 70 000 how is the handling of the 550 compared to the 555
Hy kom !!!wil September gaan vis!!
Hoe dik is maak ek my ace se deck die marine ply kom in 16mm is dit dik genoeg
Hi Seadoc. Thank you for the long explanation. With our XL 115hp Yammies with 3 x 19P props at 4000 rpm we would get about 23 knots. We could push the throttles some more but always felt that would be pushing the motors too hard. Not knowing what I am learning now from you guys I realise we should have established what was going on. So I think we might have been able to get 25 knots or so at 4500 rpm maybe a little faster. But hardly reach 5000 rpm which are those motors maximum torque. Thier WOT was 5500 rpm, which we would never have even got near. So yes I believe those motors were lagging and there was about 24% slippage taking place.
What would have happened if those props were 4 blade and slippage was reduced to say 10%? Should we have been running with 17P on those motors?
Well thats all in the past. Now looking at lengthening the shafts on our Suzuki's. Going to cost around R27K. I think it is a whole bottom unit and not just spacers. Perhaps we can sell the old units and shafts as spares.
I have a worksheet to calculate theoretical speed through the water which I attach. At this moment I believe we are looking at too many variables. Motor height, prop pitch and 4 blade SS. I think we need to get our motor height correct before any prop attributes can be measured.


Nice friends!
Maybe they were all in hospital with back injuries?![]()