Getting the horse in front of the cart
Hats off to Howard for taking so much trouble to analyse the photos and start discussing structural ways and means. Of course, I am in no position than to do other than approve of the post being “long winded”. And I happen to agree that the most promising direction to go in, with the little we actually know, is to try to utilise the existing mast position because it looks as though that might well be possible. However, I think it is a little too soon to get too far ahead, just as it is too soon really to be speculating about type of junk rig, number of masts, whether or not a tabernacle, high or low aspect ratio etc. We don’t even know yet for sure what the hulls are made from.
I think it is sufficient at this stage to look, in general terms, at the issues these things raise, especially mast location and how it affects plan form. And how in turn it is affected by structural and accommodation layout. As an aside, Arne’s suggested sail plan has huge merit for consideration and is valuable for general discussion.
Where does this leave Ivan now? Better informed, I hope, regarding the research he now needs to do and the options which may be available to him.
Ivan writes: “I am waiting to hear back about sailing characteristics and a floor plan” and I think that’s a good start and about as far as anyone can go for the moment. “Sailing characteristics” will need to include some details of the hull form and any appendages below the water line, and preferably also the designer's sail plan. “Floor plan” will best include structural details, not just layout of berths, galley etc.
I have little doubt that one way or another, this boat could be satisfactorily converted to a suitable junk rig of some kind. I agree with Howard, that question can be considered as answered. The technical knowledge needed to tackle the project can be acquired as the project is rolled out – I am all for that.
But I still remain slightly uncomfortable with the fact that a certain amount of technical knowledge will be needed right now, in order to assess this vessel and decide how big and how much of a commitment the project is going to be. That’s where I tend to get tripped up. That's where I think Ivan needs help at this particular moment, and not being on the spot, the people who are willing and able to help will need more information than some photos, a floor plan and a statement from the agent as to its sailing characteristics.
All this presupposes that the boat has been surveyed or competently assessed and that it has a clean bill of health in its current state. Ivan: get it surveyed or assessed and make sure your proposed investment would be safe. If you seek technical advice on a junk rig conversion, insist that the agent identify the design and obtain the structural drawings and/or put you in contact with the builder, so that the necessary information is available to experts who are not on the spot.
PS Ivan, it hasn't yet been positively asserted that the hulls are solid glass (it has a bit of a "glass over ply" look to me, but it is ridiculous to speculate). Scoping these structural details, as you are doing, is a good direction for the discussion to go in now, I think. It will be interesting to get some more factual information and I do hope you can get hold of the builder and/or designer and dig out some more factual information.
(Should the hulls prove to be of solid fibreglass there are other threads on this forum which have taken us through the details of prepping and grafting in new bulkheads and other structures where needed - the hard part is trawling through the technical section of the forum and finding them. Scott's Moon River thread comes to mind as an example - it starts here and its worth starting at the beginning.
Hopefully such major changes won't be needed).
Junk rig is a means to an end, it shouldn’t be an end in itself. If the boat is sound and you like it very much, you will be happy with it even with its existing ketch rig. A season or so will give you time to get to know the boat, get lots of good advice – and the junk conversion can happily evolve in due course.