fushandchips wrote: thanks Tagit ,around the 5500 mark 30lph makes sense if you think about the commute time. (40 mins round trip being 2/3 rd's of an hour = 20litres I wonder what an equivalent sized 4S version would be using? |
fushandchips wrote: thanks Tagit ,around the 5500 mark 30lph makes sense if you think about the commute time. (40 mins round trip being 2/3 rd's of an hour = 20litres I wonder what an equivalent sized 4S version would be using? |
Blades | 4 | Prop Slip | ||
Prop Pitch | 15 | |||
Gear Ratio | 2.38 | |||
RPMs | Knots | L/H | NM/L | Slip |
600 | ||||
1000 | ||||
1500 | ||||
2000 | 6 | 5.1 | 1.18 | 42.16% |
2500 | 6.5 | 7.6 | 0.86 | 49.87% |
3000 | 8 | 10 | 0.80 | 48.58% |
3500 | 11 | 12.5 | 0.88 | 39.40% |
4000 | 17 | 16.6 | 1.02 | 18.05% |
4500 | 20 | 20.5 | 0.98 | 14.30% |
5000 | 23 | 24.83 | 0.93 | 11.30% |
5500 | 26 | 27.5 | 0.95 | 8.85% |
6000 | 28 | 40.7 | 0.69 | 10.02% |
6250 | 30 | 42.75 | 0.70 | 7.45% |
tiras wrote: Just wondering what you guys would consider acceptable fuel consumption on a SF535 with a 2 stroke Yammy 115 salt water series. Currently I'm burning close to 120lt on a trip to the barrier and back with some moving around the broken island's when launching from Omaha. RPM is sitting around 4000-4500 so is on the high side and the total trip each way takes 1hr or less in good conditions. with the price of fuel getting up there this make for an expensive day on the water. thoughts?? |
Tagit wrote:
If that is say 3 hours running(?) then that is horrible even for a SWS Yammie 115hp which for some strange reason are horribly hungry anyway. If it is 3 hours and 120l then that is more like the fuel burn of a 175 SWS 2 stroke. Time to check engine height and prop loading/slip to see if you might have it set up a bit wrong. |
Bounty Hunter wrote: yeah thats fursty a 60-odd mile day for twice the litre count
yammie 115s have always loved drinking fuel but yours does seem a bit over the top considered going a bit slower if its hurting your wallet? |
Tagit wrote: You won't know how much the prop is slipping without doing some calculations. Do you know your speed at say 4000 or 4500 rpms? What rpms and speed can you reach at WOT? |
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