Lutra Laker, Design by David Nichols

[usedfilm]

i am newcomer to boat building, I hope to build the following, Lutra Laker, Light MOTOR Boat 17' 6, Designed for light trailer
• Length: 17 ft 6 inches (5.34 m)
• Beam: 48 inches (1.22 m)
• Draft: 4 inches (102 mm)
• Weight: 150 pounds (68 Kg) - approx
• Displacement at 4 inches: 770 pounds (at 102 mm, 350 Kg)
• Outboard motor: 10 HP maximum

As anyone build this boat? or can some help me with the plans? the "OFFSET" I cannot get my head around.

[kiwi]

Someone who can help you with lofting:

http://www.douglasbrooksboatbuilding.com/lines.html

Tony

[usedfilm]

Sorry Tony, Your Link you sent me, is not working!

[PAR]

There are several books that cover the subject of lofting. Simply put, the numbers relate to specific points on the hull at each station. The heights are (in this case) measured up from the bottom of the lowest point on the keel (as noted in the offsets), which appears to be straight from station 5 aft.

The half breadths are measured away from the centerline of the boat at the sheer, upper and lower chine and the keel (again as noted in the offsets table). Also noted in the table is all measurements are to the inside of the planking, which is a handy feature when making station molds.

This boat isn't designed to be over powered so keep the HP modest. The numbers used are displayed in feet then inches, then eighths of an inch. In other words the notation 2-3-4 actually means 2' 3" and 4/8" (1/2"). Most modern designers have stopped using these old school dimensioning on offset tables, preferring directly read dimensions such as 27.5" for the same offset as I previously mentioned, but some still use the old method. I have to admit some of my older designs have yet to be converted.

[usedfilm]

PAR, Hi there, It's the OFFSET plan I cannot make sense out of, I am looking for someone to go through the sizes with me for each station, so I can make them up.

Can you help me?

[JEM]

I could help you. It's not as bad as it seems.

The heights measurements are the lines of the hull if you looked at it from a side view. The half breadths are the stations if you looked at it from a front view.

Any info in the plans on how far apart (longitudinally) the stations are? I'm guessing 24".