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This section is incomplete. It is an expansion of the old "hull framing" page.
Update 10th November 2008. Although it seems to be shown on the outboard profile plan, the black boot topping seen in the below drawing may not have been used according to a post I read at ptboats.org. If this is the case then the copperoid bottom paint would extend up to the same point as the black does. I'll try to find out if this is true for all the 80 foot Elcos, please drop me an e-mail if you know.
The following information is based mainly on the Elco lines plan number 3000 dated December 24th 1941, and several other plans. Dimensions given were found on the plans or derived from them. They represent a best effort on my part, please confirm dimensions and information given here for yourself if errors cannot be tolerated. Images are for non-commercial personal use only, please obtain permission for any other use.
General notes regarding the lines plan:
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The plan is only available half-sized and stitched from photos so some repair was needed.
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Stations, buttock, and water lines are used by the lines plan to lay out the shape of the hull.
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Stations are evenly spaced 88" divisions along the LWL (length on water line, not the same as the painted W.L.). The LWL is 73' 4" (880") and goes from station 0 (68") to station 10 (948") with st1/2 added between st0 and st1.
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The lines plan shows front (body plan), top (half-breadth plan), and side (sheer or profile plan) views of the hull.
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The top view shows the outline of the hull along with additional outlines based on horizontal slices through the hull called water lines.
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The side view is similar except that it shows the hull profile along with additional vertical slices parallel to the keel called buttock lines.
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The front view shows the cross sections of the hull at the stations.
Hull profile:
The following image shows hull sections located at the stations. I have straightened it the best that I could but it is not perfect. The blue lines were added as guides for straightening. I will post accurate gridded outlines based on all three views when the hull is finished.
Body plan derived from Elco/B.O.S. lines plan 3000, available at ptboats.org.
Deck camber layout:
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Frame Sections, 1942 ELCO 80' Patrol Torpedo (PT) Boat
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Forepeak
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0 to 77"
From frames 0 to 4
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6' - 5", 6.417', 77"
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1 frame at 29":
0 to 1
3 frames at 16":
1 to 2 through 4
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Crew's Toilet
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77" to 155"
From frames 4 to 9
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6' - 6", 6.5', 78"
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4 frames at 16":
4 to 5 through 8
1 frame at 14":
8 to 9
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Crew's Quarters
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155" to 311"
From frames 9 to 21
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13' - 0", 13', 156"
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6 frames at 14":
9 to 10 through 15
6 frames at 12":
15 to 16 through 21
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Officer's Quarters
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311" to 534.5"
From frames 21 to 39
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18' - 7.5", 18.625', 223.5"
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12 frames at 12":
21 to 22 through 33
5 frames at 13.5":
33 to 34 through 38
1 frame at 12":
38 to 39
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Tank Compartment
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534.5" to 650"
From frames 39 to 47
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9' - 7.5", 9.625', 115.5"
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1 frame at 12":
39 to 40
6 frames at 15":
40 to 41 through 46
1 frame at 13.5":
46 to 47
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Engine Compartment
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650" to 854"
From frames 47 to 61
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17' - 0", 17', 204"
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1 frame at 10":
47 to 48
11 frames at 16":
48 to 49 through 59
2 frames at 9":
59 to 60, 61
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Rudder Compartment
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854" to 960"
From frames 61 to 69
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8' - 10", 8.833', 106"
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1 frame at 9":
61 to 62
6 frames at 12":
62 to 63 through 68
1 frame at 13":
68 to 69
(note: 12" on some plans)
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Frame Spacing Along Keel, 1942 ELCO 80' Patrol Torpedo (PT) Boat
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General Notes:
Measurements are to stern side of frames per plans.
Frame 0 would be where keel (stem) and deck lines meet if drawn to a point, a few inches forward of the fairlead that caps the bow.
Frame 69 is measured at 648" on some plans and 647" on others.
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1
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2
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3
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4 **
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5
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6
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7
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8
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9 **
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10
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29"
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45"
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61"
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77"
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93"
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109"
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125"
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141"
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155"
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169"
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** = watertight bulkheads.
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11
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12
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13
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14
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15
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16
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17
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18
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19
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20
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183"
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197"
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211"
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225"
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239"
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251"
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263"
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275"
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287"
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299"
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21 **
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22
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23
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24
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25
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26
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27
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28 **
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29
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30
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311"
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323"
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335"
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347"
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359"
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371"
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383"
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395"
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407"
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419"
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31
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32
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33 **
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34
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35
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36
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37
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38
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39 **
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40
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431"
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443"
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455"
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468.5"
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482"
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495.5"
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509"
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522.5"
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534.5"
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546.5"
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41
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42
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43
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44
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45
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46
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47 **
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48
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49
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50
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561.5"
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576.5"
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591.5"
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606.5"
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621.5"
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636.5"
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650"
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660"
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676"
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692"
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51
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52
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53
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54
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55
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56
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57
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58
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59
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60
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708"
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724"
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740"
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756"
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772"
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788"
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804"
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820"
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836"
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845"
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61 **
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62
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63
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64
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65
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66
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67
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68
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69
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854"
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863"
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875"
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887"
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899"
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911"
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923"
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935"
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947" - 948"
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