Help me spec a new rig

Snowden

Super Anarchist
1,009
506
UK
Wanted to canvas opinions on a reasonably big decision I have to make soon and there are usually clued up people on this board.

Boat is a 1997 Projection 920 (similar to a J/92s I suppose?), 30ft with frac rig and bowsprit for asym kites. Predominantly used for 1H/2H inshore and cat 3 offshore racing.

I had the rig craned out this year for an inspection given that the standing rigging is about 10 years old. The rigger has effectively condemned it and looking at it I am not surprised. Previous owners have variously (i) added a masthead spin halyard, (ii) filled the inside lower quarter with foam (keel stepped, stopping leaks), (iii) drilled drainage holes and (iv) added a load of heavy brackets at the masthead. At some point the chainplates were moved 30cm aft, allowing swept spreaders to be fitted and a swap to non-overlapping jibs.

Would appreciate thoughts on a couple of key decisions which are all variants of the ratings vs performance vs cost equation. Planning to buy new main and jibs (replacing 2016 Nordac).

  1. Stick with current dimensions or redesign (given evolution from CHS to IRC, swap from overlappers to jibs). I don't really want to buy new kites (frac and MH) so that may be a limiting factor
  2. Carbon or alu (boom / stick / spreaders)
  3. Replace boom or hack current
  4. Slugs or bolt rope
  5. Rod/wire standing rigging
  6. Many others I have missed

All the above in context of a reasonable budget for a 20+ year old boat targeting mid-fleet Solent performance on a good day.

Attaching some pics showing the as designed chainplate location and the current setup.

View attachment Profile Drawing iPhone crop.png

WBRT.jpg

 

JL92S

Super Anarchist
1,778
424
UK
Carbon single spreader rig, alu spreaders and dyform rigging. Keep the boom. Bolt rope main

 

Zonker

Super Anarchist
8,894
4,803
Canada
If the budget allows carbon tube. See what is available off the shelf. Contact the US suppliers who might have a tube that is on the shelf or a cancelled project. Forte comes to mind for smaller boats like yours. Scroll down past the round tubes. https://fortecarbon.com/marine/mast-sections/

Yes to keeping the boom unless it's horrible or has big issues with usability/too many holes, etc.

Yes, I'd stick with wire.

 
A 2nd hand Farr 30 or Figaro 2  carbon rig should fit the bill, it did for the J/92

Otherwise, new for IRC, an alum, 9/10th MH, 105% headsail mast with dyform wire should do the trick for decent money

Use the same boom, unless shot.

 
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Snowden

Super Anarchist
1,009
506
UK
I like your thinking but I'm in the UK. J/92s (P=11.85m) or Farr 30 (P=12.36) rigs are also good ideas but both would be a bit 'turbo' versus the current rig (P=11.25). Fig 2 (P=13) would definitely be too big! Boat feels reasonably powered up 1H/2H and we usually get decent breeze in the Solent so not necessarily looking to go bigger.

Anyone have an idea of what the IRC penalty for a carbon rig is in this size range? We rate 0.985 w/ J2, 0.973 w/ J3 at the moment.

 

Snowden

Super Anarchist
1,009
506
UK
Carbon single spreader rig, alu spreaders and dyform rigging. Keep the boom. Bolt rope main
Wouldn't it have to be quite a chunky section to go single spreader? J/88 rig would be close to the right size but I think it's deck-stepped.

 

JL92S

Super Anarchist
1,778
424
UK
Wouldn't it have to be quite a chunky section to go single spreader? J/88 rig would be close to the right size but I think it's deck-stepped.
A single spreader mast with D2s to help support the upper panel should carry a lower cog than a twin spreader. Pogo do a similar thing with the 30. A J88 mast will be too short and I don’t rate the quality that high. They blow their spreaders up 768D2B4B-4FA7-40E3-BB11-868DBBD0D6CD.jpeg

 

Snowden

Super Anarchist
1,009
506
UK
That's a good looking rig, would be interesting to see whether I can achieve something similar on a less beamy boat (3.0m vs 3.7m). Noted re J/88, cheers

 

Snowden

Super Anarchist
1,009
506
UK
By the way, if anyone knows the Mills 31 RAPTOR (ex AZTEC) sailing in Ireland, it looks like they have done a similar thing (late 90s CHS to IRC), would be interested in any details

chs31-aztechas95.jpg


cairns_raptor15jpg.jpg


dem20_1.jpg


 
Nice looking boat, you got me googling the Projection 920 and I came across this.
https://www.sail-world.com/forum/forum_posts.asp?TID=2423&PN=83&title=projection-762-help-please
Looks like a fun ride.

If you go Aluminum the Z-Spar Z351 section seems pretty popular for boats around that size. (Archambault 31 etc)
Good suggestion, I have the Z-Spar Z351 on my second Archambault 31, the first one had a VMG SoroMap which I would not buy too soft.  Very happy with the Z351, stiff and weight is great for alum.  I have a two spreader with long aft raked spreaders, chain plates at sheer.

Also suggest you do NOT go just bolt rope, add Ronstan Series 6 cars to the stock Z-351 section with a mast gate.  Fast easy reefing, cars live on the mast by just pulling fast pins to remove main.  Cars are ball bearing and as smooth as any Harken system I have used in the past on my Quest.

Best of luck getting the right combo for your sailing.

 
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Snowden

Super Anarchist
1,009
506
UK
Also suggest you do NOT go just bolt rope, add Ronstan Series 6 cars to the stock Z-351 section with a mast gate
Love the idea of not messing around with a boltrope singlehanded, BUT with slugs wouldn't I need a trysail track or deep (>40% luff reduction) 2nd reef to race cat 3?

 
Good point, I use a very deep third reef on the main.  Have new one coming from Doyle, Stratus.  And Stratus furling SS/HW jib on new inner chainplate and halyard going in this winter.

 
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MiddayGun

Super Anarchist
1,061
384
Yorkshire
Love the idea of not messing around with a boltrope singlehanded, BUT with slugs wouldn't I need a trysail track or deep (>40% luff reduction) 2nd reef to race cat 3?
Just as an addition to Kincoras point, I've got a Z351 section on my MG27, single spreader, deck stepped, P = 10.2m so about 1m shy of yours. (Close to a 9/10th rig) 
I use slugs rather than the cars and even with my fully battened main they slide very freely, cars would be better of course but it depends on your budget.

 

viaguil

New member
1
0
France
Hi,

In Europe, with same range of profiles you also have the M350 from AG+ Spars. It has supplied several J92S and A31 and now the Tofinou 9.7.

For the first two boats, it's equiped with two tapered spreaders' stages. Discontinuous  with aluminum machined ends. So aluminum spars with light parts and they do lot of custom boats. 

 

SSolo

Member
162
197
England
if you have the money - carbon spar and soft rigging - best way of losing weight aloft ; get the rig manufacturer to work with you as to how you sails the boat (reefing/headsails etc) so they can design rig to match

- would not go for an 'one size fits all off the self solution - unless it is specially for the boat

 

Black Jack

Super Anarchist
How much do you expect to pay for this new rig and new sails for this 24 year old boat? It begins to approach reasonable cost to performance question. With the rig, the hull will have to be tightened and refreshed. Still leaves you with an older one off that takes serious phrf hits.

 
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