Some of you maybe aware I recently made a crossing to Braye on Alderney from Langstone. What should of been a straight forward crossing turned into an epic 10 hour struggle which eventually seen me run out of fuel and have to be rescued by the French coastguard.
So here is where the riddle begins.
On the return leg, conditions flat calm and for the first hour or so we had a flowing tide pushing us along.
- Boat - Humber Ocean Pro 6.3m
- Engine - HOnda Vtec 150hp
- Crew - 5 Blokes average 90KG per person
- Kit - 3 x Dive Kit (30kg Each)
- Fuel - 260l - (260KG)
- Camping Gear - 50kg
- Life Raft - 45kg
My boat set up has an internal tank of 160l and 2 External tanks (25l each) with a direct feed into the fuel system.
WE set off with the intention of keeping the boat to about 4000rpm and constant on a direct track (anyone deviates 500m from the track were sacked as skipper).
I had the fuel switch set to draw down on main and the hose was connected to the first 25l. After about 3 hours running across the channel the engine died which indicated the fuel had gone, i then went to move the fuel switch and noticed it was slightly off centre, I moved to all the way to external and tried to start the engine, nothing. Checked the 25l tank and it was empty, so scratching our heads, had teh fuel in this tank leaked out, but surely we would smell 25l of unleaded swooshing in the boat. Anyways swapped the pipe over to the other 25l and siphoned 50l of reserve fuel from 2 jerry cans into the main tank.
So in theory now I have 75l left (50 in the main and 25)
We run the engine and of course we can see home so the engine is flat out and we are doing 28 knots WOT.
External tank runs out and we switch back to main and run that for about another hour which really should be taking it down to about 20l left.
Heres where it gets confusing.
I took the boat out for a trip up the Hamble yesterday and went to fill the engine. Expecting to put in about 140l. But it would only take 50l which indicated 110l left over, which to me is impossible as I only put 50 in after it ran out at sea.
So I couldnt understand how going to Alderney i managed to get through 210l and still run out. Its only 82miles
On the return I actually then only used 150l which is more realistic as we were gunning it.
SO I suppose the question is - how did I end up with 110l after only dropping in 50 on an empty tank?
All suggestions appreciated