3JH4E cruising RPM

Edited by Captain Cook - 28 October 2019 at 16:20

Here are the numbers for a Hanse 345 with the Volvo D1-30 with factory fitted folding two blade prop. Speeds have been recorded via GPS in calm water, no current and freshly painted bottom:

H345          Volvo D1-30          flat water, no current, fresh paint
                    
rpm     kn     ltr/h     hrs/     nM/
               150 hrs     150 hrs
1500     5.7     0.9     167     950
1800     5.8     1.5     100     580
2000     6.3     2.0     75     473
2100     6.5     2.2     68     443
2300     6.8     2.8     55     371
2400     7.1     2.9     52     367
2600     7.4     3.5     43     317
2800     7.5     4.5     33     250


Edited by Fendant - 26 October 2019 at 09:56

I always fill up to 90% and note engine hours and the ltrs since last fill up.
This gives me the average consumption over time, I have an average between 1.9 - 2.1 ltr / hour.
The consumption / rev diagram is from the Volvo manual.

As I am mostly cruising at 2000 rpm, my result is in line with the Volvo diagram.
As a rule of thump these uncharged diesel engines all have a minimum at 180g/ps/hour.




Edited by Fendant - 26 October 2019 at 17:39

I can now confirm that I have the FlexOfold 18x12 3L. This gives me 8 Kn @ full trottel (3000 rpm), with clean hull and calm wether. To be able to determine the prop size on the FlexOFold you need to take off the blade(s) to see the marking. On mine it was marks 18 and a 2 (mening 12 inch pitch), on each blade.