Wanderer deck reinforcement for free-standing mast

I’ve got the deck reinforcement in. Horrible job, working in a tight space with no room to move my arms and epoxy dropping on me. But it is in. Phew.

Cross-member in Douglas Fir. Note the boat isn’t symetrical!
Elegant taper achieved with power plane
Continue reading
Posted in Boat, Junk | Leave a comment

Owl: my current junk-rigged boat

I thought I’d describe my current junk rigged boat and show some of the design features. The boat is called Owl because it is green (as per The Owl and the Pussycat).

The boat is a 11′ GRP clinker-style boat originally built in the early 1980s for a gentleman to take his kids out in. I suspect it was adapted from a standard hull – probably designed for rowing or fishing. It had:

  • A flat centreboard that is a bit far aft;
  • A rudder that only just touched the water;
  • A standing lug rig that wouldn’t go upwind, with heavy yard and boom that reduced stability and threatened to hit heads.

However it did have a free-standing mast and, without the lug-rig up, was extremely stable. A perfect candidate for a junk rig!

Continue reading
Posted in Boat, Junk | Leave a comment

Mast partners sorted!

Figured out how to secure the mast at the partners. The rear chock now is ornamented by two bits of aluminium:

  • A plate on the bottom at the back to stop the back rising when the chock is pulled towards the mast;
  • A lashing point on the top of the block.
Rear mast chock with aluminium bits

In use it works like this:

Mast lashed in position

This is quick and easy to set up and very secure. I can lift the bows of the boat by pulling on a line to the mast top without any sign of the mast or chocks moving. As with all these things, once you figure out how to solve the problem it is easy and obvious.

Posted in Boat, Junk, Metalwork | Leave a comment

Mast update

Got the mast strengthener in today. I was assuming that it would just slide in; however it jammed after a bit probably due to grit somewhere. Every time I took it out and cleaned it up (filing off the scratches) it jammed again, so I hammered it in using a wooden mallet. Fortunately it went all the way in without jamming completely. Phew.

Strengthener in with the aid of 3-in-one oil and a big hammer

I put the mast foot back on with locktite thread lock on the screws – I don’t want them coming out under sail.

Continue reading
Posted in Boat, Junk, Metalwork | Leave a comment

Mast is up! (Sort of)

Real progress. Got the turning block fixed to the tabernacle:

Secured with self-tapping screws through at top and bottom

I’ve made a (rather rough – don’t look too closely) pivot. This has threaded holes so that bolts can be screwed in from either side to avoid making a big hole in the back of the mast

Continue reading
Posted in Boat, Junk | Leave a comment

Calculating junk rig sail camber

I want a cambered sail for the advantages it gives us – better performance particularly close to the wind. There are disadvantages for ocean travellers – the sail can flap about in light winds and swell – but these don’t affect a dinghy (hopefully!).

This is my approach to calculating how to make the sail. There are others, and there may be errors in my calculations – if you spot any please let me know.

If you want to skip the maths there is a spreadsheet that you can plug the basic figures into. The maths is just to explain what the spreadsheet is doing – for me as much as anyone!

Continue reading
Posted in Boat, Junk | Leave a comment

Turning block (almost) complete

Made the turning block to redirect the lines from the mast back to the helm.

Looks the part!

Obviously the screw heads need to be aligned, and I need to figure out how to attach it to the tabernacle. Otherwise very happy with this!

Posted in Boat, Junk, Metalwork | Leave a comment

Free standing mast: update

Making progress. The mast head is together:

Mast head complete
Continue reading
Posted in Boat, Junk | Leave a comment

Free-standing mast: more bits made

I’ve made some more bits for the mast:

Mast head and taper sleeve
Drawing of topmast support bung
Continue reading
Posted in Boat, Junk, Metalwork | Leave a comment

Fitting the free-standing mast

I’ve started fitting the mast to the hull. First off the heel fitting.

The heel is bored out to make it a bit lighter
Cutting the slots for the mast rack
Heel fitting on the rack
Continue reading
Posted in Boat, Junk, Metalwork | Leave a comment