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Whats ya RIG?

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Post Options Post Options   Likes (0) Likes(0)   Quote Jemry Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2017 at 12:21pm
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Originally posted by KikBac KikBac wrote:

When people talk litres per hour (particularly on a diesel) are they taking litres per engine hour (taken off the tachometer) or elapsed hour (off your wristwatch?) Dave, you might like to comment?
I take mine off engine hours, always refuel when I come back in and work it from litres used/engine hours, varies a little (15-18ltrs p/hr depending on sea state and how loaded we are. got it down to 13ltrs p/hr second to last trip with just me and the wife) but is close enough. 
I also run a log book which this gets entered into.
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Post Options Post Options   Likes (0) Likes(0)   Quote Tagit Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2017 at 3:03pm
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Originally posted by KikBac KikBac wrote:

When people talk litres per hour (particularly on a diesel) are they taking litres per engine hour (taken off the tachometer) or elapsed hour (off your wristwatch?) Dave, you might like to comment?

Engine hours normally KB. We sometimes go for 10 day long trips and troll maybe 12+ hours per day. On some of those trips we only have 1 or potentially no fuel stop so I get anal about estimating fuel consumption. What I do is have a trolling speed fuel number, and  cruising speed fuel number. Idling around when anchoring etc is minimal fuel use. When we head out I mentally note the amount of time we do at cruising rpms and then take that off the engine hours to get the trolling hours with a small adjustment for idling time. I can usually work out a 10 day trip within around 5% or so if I need to by using those numbers and planning my trip on the charts or Google Earth.
Without having an instantaneous fuel burn number from a seatrial or live fuel burn gauge etc it is normal that people slightly underestimate their actual cruising fuel burn by using the engine hours which include the idling time etc. If you want a better estimate use a watch and note your duration at cruise rpm's separately to your idle rpms or trolling rpms. After a few trips you can probably do a little bit of calculus to work out what the fuel burn at the different speeds is.
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Post Options Post Options   Likes (0) Likes(0)   Quote SaltyC Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2017 at 5:38pm
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I track my engine hours and keep a note at the helm of hours below 1500rpm and hours at cruising revs, over 3000rpm. We almost never run between 1500 and 3000 rpm (other than in the 12 knot zone in the Auckland harbour grrrrr) . Above 1500 we jump on the plane pretty quickly.

Below 1500 revs I use 10lph , at cruising revs I use 50 lph. Over the last 10 years my calculated usage has been within 20 litres of actual (usually above actual) at every fill averaging 600 litres per fill.

I don't think you are anal at all Tagit Wink
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Post Options Post Options   Likes (0) Likes(0)   Quote Tagit Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jan 2017 at 7:01pm
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Post Options Post Options   Likes (1) Likes(1)   Quote Scuba Skip Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2017 at 8:13am
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New rig hit the lake for testing in the weekend. Yamaha f115 with spitfire x7 four blade 15 pitch prop, really suprised how well it gets up! Off to the coromandel this Friday
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Post Options Post Options   Likes (0) Likes(0)   Quote FredKaiser Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2017 at 10:03am
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Good work Skip... she looks mint!!!

I'm taking the missus to Sportcraft Marine today in Morrinsville at lunch. Keen as to get the same boat ay.

We need to catch up for a fish sometime soon... well overdue!

Cheers
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Post Options Post Options   Likes (0) Likes(0)   Quote DeezKnots Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2017 at 7:10pm
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Hi CATCHA . Haha I now own this boat mate have only just purchased it
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Post Options Post Options   Likes (1) Likes(1)   Quote FishR52 Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2017 at 8:25pm
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My 14m Tim Barnett powered by 500hp Yanmar on the hunt for big kings last weekend 👍

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Post Options Post Options   Likes (0) Likes(0)   Quote FizFisho Quote  Post ReplyReply Direct Link To This Post Posted: 20 Jun 2017 at 9:22am
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Originally posted by FishR52 FishR52 wrote:

My 14m Tim Barnett powered by 500hp Yanmar on the hunt for big kings last weekend 👍


Simply all class, top Rig made by one of the best. He makes some damn nice offshore RIBs as well. Clap
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Post Options Post Options   Likes (0) Likes(0)   Quote FizFisho Quote  Post ReplyReply Direct Link To This Post Posted: 20 Jun 2017 at 10:02am
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Originally posted by cornf3 cornf3 wrote:

Yes Almost need a facemask on. Only will do this with 1 person in. Any more top speed at WOT drops quite dramatically.

Haha yeah those cats go like a cut cat. They handle well though. I was doing 65kph in my RIB with a 3Cyl Yammy propped and hydro foiled for hole shot not speed, but even at 65kph it get squirelly real quick in a tiller. Still, the bdc's are the best SMALL trailer boat available imo, but they come at a cost.
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