Selden Sailmaker's Guide (PDF)

SELECTION GUIDE

What the Selden Sailmaker's Guide covers and the numbers a sailmaker needs most: what to tell the sailmaker, slides for C masts, Furlex sail-space data for every generation, and CX, GX and CXr dimensions; plus the carbon spars supplement.

DocumentSelden Sailmaker's Guide

FormatPDF · 66 pages · 13.1 MB

LanguageEnglish

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What to Give Contents C-Mast Slides Furlex Sail Space CX, GX & CXr Products

Information the Sailmaker Needs

The guide covers the major part of Selden production from 1977 onwards (and generally applies to Kemp products of the same period). It is an aid only; it is the sailmaker's responsibility to make sure the sail suits the rig.

Sail	Give the sailmaker
Conventional mainsail (short or full length battens)	Mast section dimensions, boom section dimensions, sail plan ("P" & "E").
Furling mast mainsail	Mast section dimensions, boom section dimensions, reefing system type (Selden furling, Furlex-Main, etc.).
Roller furling genoa	Furlex type, total forestay length incl. all toggles or available sail space, sail plan.

Mast type	Years
D and E sections: conventional masts	1977 - 2002
R sections: furling masts	1989 - 2002
C sections: conventional masts	2003 & 2017
F sections: furling masts	2003 & 2017

What the Guide Covers (595-542-E)

Chapter	Content	Pages (as printed)
1	Introduction	2
2	Conventional masts: sections, deflection curves, head measurements (yacht and keelboat)	4-7
3	Mainsails: fitting slides, sail slides (E and C masts), shackles, OWS slider, MDS 45/68/80 and IWS full batten systems with parts and RM limits, RCB System 22 and 30, try sail slider, sail feeder gates	8-27
4	Batten receptacles: fitting and range	28-29
5	Booms and reef systems: boom sections, slab-reef and single line reef booms by period, Match booms, clews, running reef-hooks, boom sliders	30-42
6	Furling mast: R and F sections (manual, hydraulic, electric), Furlex Main retro-fit, design aspects of furling mast mainsails	43-51
7	Furlex: 20S-40S, 50S-500S, 104S-404S, 200TD-400TD, 204TD-404TD, Hydraulic 300H-500H	52-57
8	Furling systems CX, CXe, GX, CXr: dimensions, tackboards, headboards, adapter	58-62

Carbon spars supplement (595-545-E)

Additional information for carbon yacht and keelboat masts and booms, covering carbon/carbon and carbon/aluminium combinations (not spinnaker poles or bowsprits): carbon mast sections and section properties, sail tracks, deflection curves, boltrope luff and RCB22 track and cars, keelboat slides, carbon boom sections, mast/boom combinations (aluminium and Match slab-reef and SLR booms on carbon masts, carbon booms on carbon and aluminium masts), clew attachments and mastheads.

On carbon masts all sail foot "E" dimensions are measured from the aft edge of the external sail track.
Sail entry, tack and reefline dimensions are for Selden track only; detailed tack dimensions are measured from the mast section rear face, not the track.
Aluminium boom dimensions on carbon masts assume the 2008-onwards range.

Sail Slides for C-Masts and Shackles

Art. no.	Fits luff groove (mm)	Breaking load (N)	Bainbridge part no.
511-605	10	2250 N (225 Kp)	A011	View slide →
511-607	10	4000 N (400 Kp)	A012	View slide →

Shackle Art. no.	Fits slide	Breaking load (N)
307-094-01	511-602, 511-603, 511-605, 511-607	2000N (200 Kp)

Selden slides must be used on Selden masts to fit the Selden sail feeder gate. The shackle is not to be used with MDS cars.

Furlex: Luff Groove and Maximum Sail Space FL–(F+E)

Sail space is calculated from the existing forestay length FL (or FLD, forestay length to deck, for through-deck units).

Furlex A–D, 50S, 100S–500S (also valid for Furlex Electric)

Furlex	Section	Luff groove (mm)	Max space in chamber (mm)	Max luff tape (mm)	Cut-back CB (mm)	Cut-back height G (mm)	F (mm)	E (mm)	F+E (mm)
A	26/17	3.0	Ø 6	Ø 5	60	1100	360	280	640
B	31/20	3.0	Ø 6	Ø 5	60	1100	390	340	730
C	40/27	3.0	Ø 7	Ø 6	80	1100	540	420	960
D	50/34	3.0	Ø 8	Ø 6	100	1100	620	490	1110
50S	22/15	2.6	Ø 6	Ø 5	25	630	360	215	575
100S Ø 4 & 5	26/17	3.0	Ø 6	Ø 5	60	1100	410	280	690
100S Ø 6	26/17	3.0	Ø 6	Ø 5	60	1100	425	295	720
200S	31/21	3.0	Ø 6	Ø 5	60	1100	540	330	870
300S Ø 8	39/27	3.0	Ø 7.5	Ø 6.5	80	1100	550	400	950
300S Ø 10	39/27	3.0	Ø 7.5	Ø 6.5	80	1100	650	400	1050
400S	48/34	3.0	Ø 8	Ø 6.5	95	1100	620	535	1155
500S	60/46	3.0	Ø 9	Ø 7	95	1100	670	535	1205

Furlex 104S–404S (2014-) and Furlex Electric (2018-)

Furlex	Section	Luff groove (mm)	Max space in chamber (mm)	Max luff tape (mm)	Cut-back CB (mm)	Cut-back height G (mm)	F (mm)	E (mm)	F+E (mm)
104S Ø 4 & 5	30/20	2.75	Ø 6	Ø 5	60	1100	440	205	645
104S Ø 6	30/20	2.75	Ø 6	Ø 5	60	1100	440	220	660
204S Ø 6	35/25	3.0	Ø 6	Ø 5	60	1100	425	265	690
204S Ø 7	35/25	3.0	Ø 6	Ø 5	60	1100	425	265	690
204S Ø 8	35/25	3.0	Ø 6	Ø 5	60	1100	425	275	700
304S Ø 8	42/31	3.0	Ø 7	Ø 6.5	60	1100	430	310	740
304S Ø 10	42/31	3.0	Ø 7	Ø 6.5	60	1100	530	315	845
404S Ø 12	52/38	3.0	Ø 8	Ø 6.5	80	1100	630	390	1020
404S Ø 14	52/38	3.0	Ø 8	Ø 6.5	80	1100	630	410	1040

Head deduction, 204S-304S Mk2 halyard swivel (2018-)	F	F+E
204S Ø 6	485	750
204S Ø 7	485	750
204S Ø 8	485	760
304S Ø 8	490	800
304S Ø 10	590	905

Through-deck: 200TD–400TD and 204TD–404TD (also valid for TD Electric), sail space FLD–(F+E)

Furlex	Section	Luff groove (mm)	Luff tape chamber (mm)	Max luff tape (mm)	Cut-back CB (mm)	F (mm)	E (mm)	F+E (mm)
200TD	31/21	3.0	Ø 6	Ø 5	60	540	130	670
300TD Ø 8	39/27	3.0	Ø 7.5	Ø 6.5	80	550	150	700
300TD Ø 10	39/27	3.0	Ø 7.5	Ø 6.5	80	650	150	800
400TD	48.5/34	3.0	Ø 8	Ø 6.5	95	620	210	830
204TD	35x25	3.0	Ø 6	Ø 5.5	60	485	75	560
304TD Ø 8	42x31	3.0	Ø 7	Ø 6.5	60	490	85	575
304TD Ø 10	42x31	3.0	Ø 7	Ø 6.5	60	590	85	675
404TD	52x38	3.0	Ø 8	Ø 7,5	80	630	115	745

Furlex Hydraulic 300H–500H

Furlex	Section	Luff groove (mm)	Max space in chamber (mm)	Max luff tape (mm)	Cut-back CB (mm)	F (mm)	E (mm)	F+E (mm)
C-Hydraulic	40/27	3.0	Ø 7	Ø 6	80	540	520	1060
D-Hydraulic	50/34	3.0	Ø 8	Ø 6	100	620	675	1295
E-Hydraulic	60/46	3.0	Ø 9	Ø 7	100	620	675	1295
300H Ø 8	39/27	3.0	Ø 7.5	Ø 6.5	80	550	490	1040
300H Ø 10	39/27	3.0	Ø 7.5	Ø 6.5	80	650	490	1140
400H	48/34	3.0	Ø 8	Ø 6.5	100	620	610	1230
500H	60/46	3.0	Ø 9	Ø 7	100	670	675	1345

Sails with a luff considerably shorter (more than 500 mm) than the maximum permissible must have a permanent head pendant; total luff length including pendant should be just less than the max sail space. Too short a luff can cause halyard wrap, which can damage the forestay and put the rig at risk. If F is larger than specified (sail too short), the halyard shackle can chafe the luff extrusion: check clearance and add a pendant or a soft shackle.

CX, CXe, GX and CXr Dimensions

CX / CXe (Code 0 and staysail)

System	E (mm)	F (mm)	F+E max sail space (mm)	D1 (mm)	D2 (mm)	Ø Pin (mm)	Max fork space Ø D5 (mm)
CX10	115	90	205	14	12	10	40
CX15	125	95	220	16	12	10	40
CX25	155	120	275	22	20	12	45
CX40	190	145	335	24	24	16	55
CX45	190	145	335	24	24	16	66
CXe25 OD	285	120	405	22	20	12	64
CXe25 TD	70	120	190	–	20	12	64
CXe45 OD	300	145	445	24	24	16	68
CXe45 TD	70	145	215	–	24	16	68

Max sail space is measured from the halyard shackle to the fastening device on boat or bowsprit.

GX (gennaker / asymmetric spinnaker)

System	SDL (mm)	SDU (mm)	LS (mm)	HS (mm)	A (mm)	B (mm)
GX7.5	100	70	100	70	120	120
GX10	105	70	110	70	120	120
GX15	115	80	120	75	120	120
GX25	155	100	155	95	150	150

Max sail space = TL–SDL–SDH (includes space for lashing rope); AT-cable space = TL–LS+A–HS+B. The table heads the second column SDU, the drawing SDH (as printed).

GX tack adapter on CX/CXe	Part no.	AS adapter deduction (mm)	E, CX lower swivel deduction (mm)	SDA sail deduction adapter (mm)
GX7.5 adapter - CX10	545-028-01	30	115	35
GX10 adapter - CX15	545-128-01	30	125	35
GX15 adapter - CX/CXe25	545-228-01	40	155	40
GX25 adapter - CX/CXe45 (same for CX40)	545-428-01	45	190	50