lambay to howth

just a quick question does any one know what distance is lambay from howth harbour i went over in the boat and back and used a tank of juice [20litres] just want to work out the consumption of the engine thanks

Derek,

Depending on what part of the Island you went to ?? From the harbour in Howth to the south side of Lambay is 7 miles !!

thanks paul it was the south of the island we went to thats not bad 14 miles at full trottle 20 litres im happy with that

were ye flat out or cruising? Always makes a big difference.

Last year on the first day of the Cork small boats I managed 70km on about 35 litres. I was mostly cruising at about 18 knots.

Kev

Howth to Lambay on the chart below is 6nm.

20ltrs for 12nm even 14nm is quite a thirsty beast! - around .7nm Ltr. What engine is it?

Kevs would be approx 38nm for 35ltr - .92nm per litre - thats on a 60 being driven like a knickers!

I would expect around .8 - .9nm per litre - 100hp - mixed driving

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shes a 40hp yamaha and that was flat out i was quite pleased with that as thats the furtest iv gone since i got the boat
she still needs some more ballast at the back just to bring her down the engine seems to hydroplane alot at full trottle
needs to come down

I would think that would be normal enough for a 40hp 2s.
Ballast on the back? Strange one. Maybe a set of Doel fins on the engine might help. I remember having them on a Orkney Fastliner and it helped keep the nose down a bit.

yes jim there no 1 on my to do list they would help big time when we done the ballast on the boat stern was still a bit high
so it planes a bit