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Wednesday, September 20, 2017

Philippine Bangkas - More Design and Construction Details

In our previous post, we looked at details of outrigger design and construction in the Filipino outrigger boats known as bangkas. Here we'll look at other design and construction details in additional images from Michael Williams of Flatwolf Photography, to whom we express our thanks. (Click any image to enlarge.)


Philippine bangka boat - Flatwolf Photographer
Bangkas were originally built as dugout canoes, then as extended dugouts (i.e., with strakes added atop the dugout base to increase freeboard). As shown in this bangka undergoing repairs, plywood construction is now more common. The bottom remains a heavy plank -- perhaps a bare artifact of the original dugout concept. A roughly-hewn stem is scarfed onto the bottom, but perhaps it will be fined up before the missing side planking is replaced. Straight frames support the sides. Not visible here, but shown in the previous post (3rd image from top): there are no frames across the bottom; the side frames merely butt against the top of the bottom plank.
Philippine bangka boat - Flatwolf Photographer
Some larger bangkas have a sharply flaring top strake. This would widen the top of the hull for more interior room, deflect spray, and increase buoyancy if the bow plunges in rough seas.
The outrigger booms show both similarities and differences from that on another large commercial passenger bangka shown in the previous post (6th from top). The forward boom consists of an open-top box beam making up about half of the boom's total length. Inside the box are five bamboo poles, two above three, all of which extend beyond the box. The bottom three poles extend farther than the top two and connect directly to the outrigger float. The next boom back lacks the box beam, and has the poles supported across their middle lengths by what might be a flat plank or possibly additional shorter poles.
It's unclear if the nicely shaped outrigger float is a solid carved timber or -- what we think more likely -- a hollow plywood or composite construction.
Philippine bangka boat - Flatwolf Photographer
The flaring top strakes on this this bangka dive boat extend into a long, overhanging bow that supports a flat platform.
Philippine bangka boat - Flatwolf Photographer
A bangka of similar size to the one above lacks the flaring top strake, and its long, extended bow is narrow and not intended for use as a platform.
Philippine bangka boat - Flatwolf Photographer
This small bangka has an elegantly vertical sternpost.
Philippine bangka boat - Flatwolf Photographer
In contrast, these small power bangkas have steeply sloped sternposts.
The running gear is of notably light weight and entirely exposed, requiring great care when operating in shallow water and when hauling the boat onto the beach. The rudder post is secured outboard to starboard and is turned by a short tiller connected to a push-pull rod, allowing the helmsman to sit forward of the engine box.


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