Update February 21 2010: Update to deck hatch hold open device drawing.

Update February 19 2010: Deck hatch hold open device added.

Update February 7 2010: Deck dead light placement and construction to ELCO plans added. Deck beam dimension table to ELCO plans added.

Update January 11 2010: Hull profile plan updated to ELCO plans.

Update January 6 2010: Deck vent plan updated to ELCO plan.

Update November 24 2009: Deck vent plan updated and larger reworked body plan added.

Update November 24 2008: Black boot topping removed. I left the line for reference since it showed on the plan.

Update November 10 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:

• The plan is only available half-sized and stitched from photos so some repair was needed.
• Stations, buttock, and water lines are used by the lines plan to lay out the shape of the hull.
• 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.
• The lines plan shows front (body plan), top (half-breadth plan), and side (sheer or profile plan) views of the hull.
• The top view shows the outline of the hull along with additional outlines based on horizontal slices through the hull called water lines.
• The side view is similar except that it shows the hull profile along with additional vertical slices parallel to the keel called buttock lines.
• 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. A larger image is Here.

Body plan derived from ELCO/B.O.S. lines plan 3000, available at ptboats.org.

Deck camber layout

Deck vent styles for ELCO 80' PT boats according to the plans. Note that I have a photo of the 611 that shows a different deck box near the starboard foot rail, shaped like a larger 103-196 vent facing forward. Also, vent locations changed:
fixed type hood only: PT 103-196
rotary type taper sided hood only: PT 314-367, 372-383, 546-563
rotary type taper sided hood on a rounded rectangular deck box: PT 486-545, 565-624, 731-760

Deck ventilator PT 103-196

Deck dead lights for ELCO 80' PT boats.

Deck dead light placement ELCO 80' PT all

Deck dead light ELCO 80' PT all

Deck hatch hold open device for ELCO 80' PT boats.

Deck hatch hold open device ELCO 80' PT all