CARL H. CLARK

The two boats described in the present series of articles are designed to be of the canvas covered variety. This method of construction is very simple and easily carried out, thus being well adapted to amateur builders ; at the same time it makes a very light boat and one which will not shrink and leak upon being out of water for some time. The small, 9 ft. boat is designed especially for rowing, as for use as a yacht tender, and noted, the frames or mould lines, 1, 2, 3, etc., which appear as straight lines on profile and top view, are curved in the end view or body plan. The water lines which are straight in body plan and profile are curved in the deck plan. The water lines are spaced 3 in. apart in the 9 ft. boat, and 4 in. in the 13 ft. The first step will be to lay off the lines and get them ready for use, the proceedure being the same on both boats.

Table No. 1. Off-Sets For 12-Foot Power Tender

Numbers of Moulds.

Stem

1

2

3

4

5

S

Height of gunwale

2' 8 7-8"

2' 5"

2' 2 3-4"

2' 1 1-4"

2' 1"

2' 15-8"

2' 4 1-4"

Half breadth ,,

1' 7 1-2"

2' 3"

2' 5 1-2"

2' 4 3-4"

2' 1"

1' 81-4"

Half breadth w. 1. 5

1' 5 1-2"

2' 2 3-8"

2' 5 1-4"

2' 4 3-4"

2' 1 1-4"

1' 8 1-2"

Half breadth w. 1. 4

1' 4 1-8"

2' 1 5-8"

2' 4 7-8"

2' 4 1-4"

2' 0 1-2"

1' 5 1-2"

Half breadth w. 1. 3

1' 2 1-4"

1'll 7-8"

2' 3 3-4"

2' 3 1-8"

1' 10"

5 1-4"

Half breadth w. 1. 2

115 8"

1' 8 3-4"

2' 1 1-4"

2' 0 1-2"

1' 3 5-8"

Half breadth w. 1. 1

7 3-8"

1' 3"

1' 6 1-2"

1' 4"

Water lines are spaced 4" apaat.

Table No. 2. Offsets For 9-Foot Tender

Number of Moulds.

Stem

1

2

3

4

5

S

Height of gunwale

2' 0 3-4"

1' 9 3-4"

1' 8"

1' 7"

1' 6 3-4"

1' 7 1-4"

1' 9 1-8"

Half breadth ,,

1' 2 5-8"

1' 8 1-4"

1' 10"

1' 9 1-2"

1' 6 7-8"

1' 3 1-8"

Half breadth w. 1. 5

1' 1 1-4"

1' 7 3-4"

1' 10"

1' 9 1-2"

I' 6 7-8"

1' 3 1-4"

Half breadth w. 1. 4

1' 0 1-8"

1' 7 1-8"

1' 95-8"

1' 9 1-4"

1' 6 1-4"

1' 1 1-4"

Half breadth w. 1. 3.

103-4"

1' 5 3-4"

1' 8 3-4"

1' 8 3-8"

1' 4 1-2"

3 7-8"

Half breadth w. 1. 2

8 5-8"

1' 3 1-2"

1' 6 3-4"

1' 6 3-8"

11 5-8"

Half breadth w. 1. 1

5 1-2"

101-4"

1' 2 3-4"

1' 0

Water lines are spaced 3" apart.

being light is especially adapted for lifting on board when desired. She will carry three persons very comfortably, and four without trouble. The 12 ft. boat is fitted either for a power tender, using a 1 1/2 h.p. motor, and will be described as such, although with the addition of a centerboard and sail plate she makes a comfortable and able sailing tender. For rowing alone she is rather wide and bulky.

The lines of both boats are shown in Fig. 1, those of both being practically the same except for size. These lines are the same as would be furnished to a boat build, er, consisting of sheer plan top view, and end view showing shape of moulds or timbers. As will be

A full size reproduction of the profile or shee plan must first be made on brown paper for reference. A base line is drawn as shown, passing through the top of the keel. The following description of the work for the small boat will apply equally to the large one by the substitution of the proper figures. The length, 9 ft., is laid off along the base line and a vertical line drawn at each end. From table 4 it will be seen that the distance of No. 1 mould from the stem is 1 ft 9 in., which is to be laid off from one end vertical. The spacings of the other moulds, 1 ft. 6 in., are laid off in turn; this should leave 1 ft. 3 in. from No. 5 mould to the stern, as in the last line of table 4. Verticals are drawn at these points, care being taken to have them exactly at right angles with the base line.

The water lines Nos. 1, 2, 3, 4, 5, are now drawn 3 in. apart on the 9 ft. boat, and 4 in. apart on the 12 ft. The outline of the stem is gotten from table 3 by measuring forward from No. 1 mould on each waterline the distance given; thus, on waterline 5, 1 ft. 9 in. is laid off toward the bow, on waterline 4, 1 ft. 8 1/2 in.; on No. 3, 1 ft. 7 1/2 in., and so on, giving the outline of the stem as in Fig. 1, on the inner line. As will be noted, this curve runs into the vertical already drawn and extends up to the height of the gunwale. For striking in this

Table NO. 3. Outline Of Stem

Distance from No. 1 mould to stem on each w. 1.

9-FOOT TEND R.

12-FOOT TENDER.

Gunwale

9"

2' 4"

Water line 5

1' 9"

2' 4"

" " 4

1' 8 1-2"

2' 3 1-2"

" " 3

1' 7 1-

2' 2 1-8'

" " 2

1' 5 7-8"

1' 11 3-4"

" " 1

1' 2 1-4"

1' 7"

and other curves a small batten of oak or other pliable wood is used about 1/8 in. thick and 1/2 in. wide, held in place by brads or small awls stuck down either side of it. The sheer or gunwale line should now be struck in from measurements given in the offset table thus: From table 2 the height of gunwale on stem is 2 ft., Of in., which is measured upon the stem above the base line, the distance 1 ft. 8 in. is laid up on No. 2; 1 ft. 7 in. on No. 3, and so on. For striking in this curve a stiffer batten should be used, about 1 1/2 in. of pine or spruce held in place as before.

TABLE NO. 4. SPACING OF MOULDS.

9-FOOT TENDER. 12-FOOT TENDER.

Stem farward of No. 1 mould

1' 9"

2' 4"

Spacing of moulds 2, 3, 4 and 5

1' 6"

2'

Stern aft No. 5 mould

1' 3"

1' 8"

The after side of the stern is not vertical but rakes aft slightly, - 1 3/4 in. and 2 1/4 in. respectively in the two boats; this distance being measured on the baseline of the after side of the stern post drawn from this point to the intersection of the vertical and the gunwale.

The line of the upper curve of the deadwood is next located; it extends only on Nos. 4, 5 and Sand is obtained by measuring up from the base line the proper distance on these sections; thus from table 5; 1/4 in. is to be measured up on mould No. 4.; 3 1/8 in. on mould Mo. 5, and 8 1/4 on the stern. This curve is drawn in, making a fair, smooth joint with the base line as shown. The profile should now appear like that in Fig. 1, with the exception of the dotted section lines and the keel.