Sunday, 17 November 2013

Paddle takes me on a rowing trip up the Omanaia River.

"Paddle to The Sea" with his rowing frame and modified thwart lashed into place ready to row.

Over the last few weeks I've been refining an accessory to my Coleman Canoe that I called "Paddle to the sea"

I recently purchased a length of 50mm, (2 inch to you Americans) stainless steel exhaust tubing. I had it bent by a local automotive exhaust specialist on their tube bender. I provided a profile which I roughed out in scrap plywood with a jig saw to fit in the hull, slightly aft of the centre support beam tube.

As with Lookfar, I modified the crossbeam tube by removing it, cutting two aluminium gussets to fit in the same bolting pattern as the tube to gunwhale connection. I rotate the tube so the folded tube crimps point upward and bolt them to my fabricated, 3mm aluminium plate gussets. This allows me to drop the cross tube 75 mm (3 inches) below the gunwhale. 

I then fabricated a plywood thwart seat the same as with Lookfar, which when inverted, looks somewhat like the tail plane assembly of a light aircraft. I lashed this seat on to the centre cross beam (see the photographs).


plastic rowlocks like these are low cost but are noisy and very flexible, I chose them because they were inexpensive however I plan to replace them with metal ones before I try again.
Here you see a detail of my lashing and a glimpse of my gusset which supports the canoe's central cross tube.

A view beneath the assembly showing the method I used to locate the vertical spine of the thwart seat assembly onto the keel tube.
The rowing frame which resembles an oversize handlebar for a motorbike, was lashed in to place when I modified the cross beam. The outrigger tube lashed behind  the cross beam and the lower part of the outrigger tube in front of the vertical support post tube. This cants the outrigger tube aft giving me the ideal offset for ergonomic rowing and perfect lashing opportunities to best support the whole assembly against the significant lever forces induced by vigorous rowing.

I've used a pair of 2.4 meter, 8 foot oars.

I found the ideal ergonomic row lock positions in and old boat handling manual from my late father's library. 1500 mm (four foot four inches) between row locks, (for eight foot oars), 300 mm, (one foot) outboard of the gunwhales, row lock position, 160mm, (seven inches) above rowing thwart seat, and 300 mm (one foot) aft of the thwart seat.

Seems to work OK, rows like a real one.
The apex of the triangle on the thwart seat points forward.
The handle bar similarity is emphasized in this image.

This really is one of the most versatile and enjoyable canoes I've ever owned, the possibilities are very exciting.

I find I can cover about half a boat length per oar stroke making this a very comfortable rowboat with plenty of power. I can accommodate two passengers as well as room for gear.

No comments:

Post a Comment

Toroa by Harmen Hielkema & Mike Toy.

Header Photo: Toroa at Rawene by Julie Holton.

This blog is dedicated to the memory of my father Roelof Hielkema who instilled in me the willingness to learn.
These pages are intended to inform and add to the growing body of knowledge concerning the Canoe Culture of the Pacific, past, present & future, from the Tupuna, the Ancestors of the Pacific cultures to the people of the world.

These pages contain Images and text relating to our two proas, Toroa & Takapu, some history relating to our experiments & experiences.

The dissertation that I posted on this blog in April 2008 "Takapu The Proa" was written by me in 1997 in response to an assignment that I was set whilst studying for my design degree. The dissertation covers many issues that a proa enthusiast may benefit from reading about.

Waka define culture as culture defines waka

Waka reflect the individuality and uniqueness of a society which in turn is governed by the geography, geology, topography, climate, location, resources, isolation, origin, flora, fauna, flotsam, jetsam, etc.

Waka are our link to the past, they have shaped our present and define our future.

Waka are the vessels of knowledge, physical and mental development, freedom of bondage to the land, key to our inquisitiveness, expressions of our ingenuity and courage, our love of shape and form, the seat of our power.

Waka are the source of our material culture, from which all processes are derived.

Waka are who and what we are.