mast

Electric winch on crossbeam.

Electric winch to lower mast under forestay attachment

Mast lowered flat on roof, the two poles can also be lowered.

Mast resting on crutches ready to go under bridge.

Now imagine looking down on the sailing rigs from directly overhead and evaluating the cross-sections at various vertical levels ( I probably should draw a diagram of this view and post it on my website). Significantly this is no-where near the case with the traditional Bermudan rig, either...

We know that the restriction presented by the slot tends to divert more air around the two sides of the slot, i.e. the windward side of the main and the leeward side of the genoa. This higher flow rate on the lee side of the headsail increases its effectiveness. Now if we also overlap the...

42' Motorsailer Layout View

Two different rig options for motorsailing cat. Here a 'single-masted ketch' mast aft rig

The original masthead was able to be used on the extension even though it was somewhat smaller in cross section. The cheek block and extra pulley shown are for the adjustable topping lift and for a flag halyard. The mast extension provides an option higher attachment point for an...

This shows the joint of the mast extension. Pop rivets were used in addition to the through bolts for the stays. The two strips shown act as shims needed because the extension piece is a little smaller in cross section than the original mast section. A turnbuckle is used for attaching...

After proving the ability of the Irwin 23 to carry the larger Star Class mainsail by using a sliding gunter rig, a 5' permanent mast extension has been made by using a 3' section of mast as an internal sleeve as shown in this photo.

Olaf Harken's advanced sailing project with bi-pod mast

Being proud of our record. 24 m. long 55 cm. at partners and 2695 kgr.