mpg

[shetland536]

ive just posted a reply and its made me think about my mpg,

whats yours?

i bet theres some horrible ones out there!

 

[Whitelighter]

about 1.5 mpg average, nearly 2mpg with a super clean bum and no tide.

 

[fisherman]

1.4

 

[rich]

Less than 2 galls per hour @ 8 knots, (13 tons) wots that in MPG? /forums/images/graemlins/smirk.gif

 

[Whitelighter]

A bit more than 4 mpg

 

[GC1]

23 gallons per hour with a Volvo 5Gxi and duo prop (petrol)

 

[Whitelighter]

[ QUOTE ]
23 gallons per hour with a Volvo 5Gxi and duo prop (petrol)

[/ QUOTE ]

????????????????????????????????????????????????????????????

Did you go every where at 40 knots? I was using 11gph with the Bayliner at 22knts - and she was a bigger boat.

 

[BrendanS]

1 litre per nautical mile at 28 knts cruising speed. More consumption at higher or lower speeds. Petrol.

 

[shetland536]

23 gallons an hour,4 hours worth of your fuel would do me for a season!

 

[Kawasaki]

Don,t think about it" M.P.G "= "Miles Per Glee "=" Miles Per Great day" on the Boat=" Miles Per Gin an tonic und ore watwer with it jeeves the siysite is bcuming blured.how mychfewewll did the boa t use toodaay ? ash mutcht as that good trip though you park it . Im going to talk to the people on the Forunm. Cos their quite nice youknow! /forums/images/graemlins/wink.gif

 

[[2068]]

20L per hour per engine at a 23kt cruise, which is 40L or 8.8 Gall/hour, so about 2.5 mpg on a good day.

Diesel, KAD32 x 2.

dv.

 

[Stoaty]

2.3Nm @ 8Knts per Litre
1.75Nm @ 12Knts per Litre (must be clean to get the 12knts)

That's Erm..

10.45Nm to the gallon @ 8Knts
and 7.9Nm to the gallon @ 12 Knts

or

0.76 Gallons per Hr @ 8Knts
1.5 Gallons Per Hr at 12Knts

Diesel 6cyl VW 74hp and I manage to use between 400 and 450 gallons of red a year.

 

[Petrolia]

Mine uses about 25.4gph flat out at 40knts so I guess that's about 1.6mpg.

I've not had the boat long & haven't been that far yet so don't know the cruising figures.

However I've been perusing magazine boat tests and it looks like on most planing boats of around 35ft that 60% of max revs gives +/- 0.25 max fuel consumption. (6.5gph)

On my boat 60% max rpm is about 2350rpm. I don't know what speed I'll get at 2350rpm but I'm hoping it will be around 20knts.

This would be around 3 mpg while still not hanging around too much. When I'm next out I'll see what speed I get at 2350rpm.

Does this sound feasible ? Even if not exactly right its is amazing just how much economy improves if you back off the throttles.


Petrolia

 

[Dave_Snelson]

1.6 - which is not good, but there are plenty worse! /forums/images/graemlins/blush.gif

 

[Superflid]

Not really done enough miles to know accurately yet (about 50) but seems to be about 10mpg.

I can only do 6 knots though!

 

[fisherman]

Broad rule of thumb, 1 gal per 20hp per hour. That may only apply to displacement, anyone enlighten me?

 

[PCUK]

Is that a proportional radio control on the model you're talking about?

 

[moondancer]

We motored from Harwich to Lowestoft 2 weekends ago on about 2 gallons of petrol.

(It is a four stroke 5 hp suzuki - powering a 24ft sailing boat).