kieron riley
Active Member
Does anyone have any idea what sort of speed I would get from a Colvin seaworker mk.3 with an 80 hp inboard diesel, thanks. Kieron
Colvin seaworker mk 3
- Thread starter kieron riley
- Start date
kieronriley
Well-Known Member
And when working out fuel consumption using the 0.4 lbs per hour is this the flat out consumption or the cruising speed
penfold
Well-Known Member
Depending on the prop I'd imagine you could get up to 14-15kts unladen, probably a better idea to prop it to reach 12-13kts with a load on. You'll be dragging a wake to make the QM2 jealous at that speed though.
Bajansailor
Well-Known Member
In this Boatshed ad they mention a top speed of 8 knots with an 87 hp BMC diesel.
Seaworker 22 MK3 For Sale, 6.80m, 1987
However in post 5 on this forum thread, Kevyn mentions :
"In ours we have the then standard ford d, roughly 72hp. With a clean hull we'd average 10knots at 2200 revs, burning approx 2gph, topping out at 14knots 2600revs."
any advice on colvic seaworker
Seaworker 22 MK3 For Sale, 6.80m, 1987
However in post 5 on this forum thread, Kevyn mentions :
"In ours we have the then standard ford d, roughly 72hp. With a clean hull we'd average 10knots at 2200 revs, burning approx 2gph, topping out at 14knots 2600revs."
any advice on colvic seaworker
ChromeDome
Well-Known Member
As per pictures on the web the hull comes in several flavours.
The Length in Waterline (LWL) formula "Hull speed = 1.34 X Square root of LWL" based on the 5.94m LWL calculates to 5.9155 knots.
Some 80hp sounds to be plenty for that, IMO.
If semi-displacement the top speed potentially can be higher. Hull shape not showed, but a 40 hp outboard on this allegedly does 12-14 knots.
In any case the GW will be crucial.
Similar or identical to
Stevens-design Searider 25 cabin cruiser
The Length in Waterline (LWL) formula "Hull speed = 1.34 X Square root of LWL" based on the 5.94m LWL calculates to 5.9155 knots.
Some 80hp sounds to be plenty for that, IMO.
If semi-displacement the top speed potentially can be higher. Hull shape not showed, but a 40 hp outboard on this allegedly does 12-14 knots.
In any case the GW will be crucial.
Similar or identical to
Stevens-design Searider 25 cabin cruiser
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longjohnsilver
Well-Known Member
12-14kts cruising speed on a 22’ boat, with pothauler, spare engine and other fishing gear With a 40hp outboard!! Of course, we all believe that
ChromeDome
Well-Known Member
Well, I did write 'allegedly' 
A fully planing, flat bottom hull, GW 2200 kg, 40 hp calculates to 14,2 knots.
A fully planing, flat bottom hull, GW 2200 kg, 40 hp calculates to 14,2 knots.
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