Canoe Booms

We have made canoe booms for 25 day sailors. From 3.5 metres up to a boom of 12 metres for the Frers 105 Bolero. These booms feature a monocoque design, meaning that all elements of the boom are structural. For that reason the all up weight is 50% of a Park Avenue wing boom. The side wings are in sandwich, the cover plate monolithic.

On the cover plate there are tracks and turning blocks mounted for a single line reefing system to help you fine tune the perfect reefing angle. The control of the sail shape is especially important in high winds.

The main boom on the Holand/Castro Ketch Twirlybird is 14 metres long. The boom concept is using a triangular diamond shape. The top is wider than the bottom to withstand a compression load in excess of 30 tons when power reaching with max vang load of 45 tons. The cross-section is biggest just aft of the vang bracket and then tapered towards the inboard and outboard end. The boom structure has three extruded aluminium profiles which are joined with plates of 5mm thickness. The plates are riveted with aircraft rivets and glued with 2 component epoxy adhesive. All high load areas have internal web brackets to join the top with the bottom. The result is a very light and strong boom. The outhaul car has a special feature to keep the boom as short as possible. The outhaul rope is attached forwards of the car in order to push the clew aft instead of pulling. This reduces the boom length and the weight of the boom.