Selden Keelboat Product Catalogue (PDF)

SELECTION GUIDE

What the Selden keelboat catalogue (boats of about 18–28 ft) covers and the selection tables from it: mast and boom sections, boom section by righting moment and foot length, Rodkicker type, kicker tackles, spinnaker and whisker pole sizing and the Furlex 50S.

DocumentSelden Keelboat Product Catalogue

FormatPDF · 72 pages · 13.5 MB

LanguageEnglish

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Contents Mast Sections Boom Sections Rodkicker & Kicker Spinnaker Poles Furlex 50S Products

What the Catalogue Covers

Selden rig systems and accessories for keelboats (595-950-E, Version 1). Selden defines a keelboat as a boat between a dinghy and a yacht, approximately 18-28', often with a 50% ballast ratio. Every Selden mast and boom has a serial number engraved at the lower end of the mast and the front end of the boom (e.g. D14-C126-0584 = a C126 section): quote it when ordering parts. Page numbers are as printed.

Section	Pages
Introduction (what a keelboat is, rig calculation, Rig Facts)	4–8
Masts	9–37
Aluminium and carbon mast sections	10–13
Head box, fractional rig / masthead rig	14–17
Forestay attachment and halyard routing	18–23
Spreaders, spreader brackets and jumpers	25–27
Attachment of lateral rigging, lower diagonals	28–29
Sail entry	30
Deck-stepped masts (T-base, heel with sheaves)	31–33
Keel-stepped masts (deck ring, U-base)	34–35
Cables in the mast	36–37
Booms: kicking strap, Rodkicker and Gnav	39–53
Aluminium booms; boom sections choice	40–41
Outhaul systems, sliders, slab reef and Single Line Reef booms	42–44
Boom brackets	46–47
Kicking strap, Rodkicker rigid vang, Gnav	48–52
Spinnaker: aluminium and carbon poles, selection, kits, attachments	55–64
Furlex 50S jib furling and reefing system (boats 18-26 ft), toggles	66–69
Contents in alphabetical order	70

Rigs are dimensioned from the righting moment at 30° heel and the designer's sail plan. Blocks, cam cleats and Valley cleats are in the separate Selden Deck Hardware catalogue.

Mast Sections

Aluminium

Section	Length/width (mm)	Iy (cm⁴)	Ix (cm⁴)	Wall (mm)	Weight (kg/m)	Wy (cm³)	Wx (cm³)	Sail groove (mm)	Bolt rope Ø (mm)	Sail slider
C080	79/60	37.0	22.0	2.0	1.49	8.6	7.4	4.5	10	511-601
C087	87/64	49.8	27.5	2.0	1.67	10.6	8.74	4.5	10	511-601
C096	96/69	65.7	34.6	2.0	1.79	12.67	10.15	4.5	10	511-601
C106	106/71	92.6	44.1	2.0	1.97	15.95	12.63	5.0	10	511-602
C116	116/75	126.4	57.2	2.3	2.26	19.88	15.41	5.0	10	511-602
C126	126/79	172.2	74.6	2.4	2.54	25.37	18.99	5.0	10	511-602
C139	139/85	237.4	99.0	2.5	2.94	31.33	23.33	5.0	10	511-602

Carbon

Section	Dim. incl. track (mm)	EIy (GNmm²)	EIx (GNmm²)	Wall (mm)	Weight (kg/m)	Wy (cm³)	Wx (cm³)	Bolt rope	Sail slider
CC077	94/62	28-31	18-23	2.1-2.4	0.9-1.0	8.5-10	7-9	8	N/A
CC086	100/62	30-47	18-30	2.4-3.0	1.0-1.3	13-16	9-11	8	N/A
CC095	109/68	41-63	24-39	2.4-3.0	1.0-1.4	16-19	11-14	8	N/A
CC105	121/71	72-110	41-56	2.4-3.0	1.3-1.7	19-23	13-16	10	511-602
CC115	131/75	92-139	36-67	2.4-3.0	1.4-1.8	22-27	15-19	10	511-602
CC125	140/79	148-206	61-98	3.0-3.6	1.8-2.2	32-37	22-26	10	511-602
CC138	155/86	194-269	76-121	3.0-3.6	1.9-2.3	37-44	26-31	10	511-602

All aluminium sections are available with a tapered top. Carbon boom sections: BC086 (87/62 mm) and BC115 (115/74 mm), page 13. Spreader brackets, spreaders and jumpers by mast section are on pages 25–27.

Choosing a Boom

You need the sail foot length (E) and the righting moment (RM) at 30° heel; if the RM is not known, displacement is an alternative. Emax, Ymax and S are measured as shown in the drawing on page 41; the S measurement is also needed when boom length is set by other factors than E. Values in metres.

Section	Height/width (mm)	Iy (cm⁴)	Ix (cm⁴)	Wall (mm)	Weight (kg/m)	Wy (cm³)	Wx (cm³)	Sail groove (mm)
B087	87/60	60.2	27.7	2.0	1.55	13.4	9.3	5.5
B104	104/60	97.5	33.6	2.0	1.71	18.5	11.2	5.5
B120	120/62	155	42.5	2.2 - 2.6	2.12	24.8	13.7	5.5

Masthead rigs, Emax and Ymax (m)

RM 30° (kNm)	Displ. (tonnes)	B087 Emax	B087 Ymax	B104 Emax	B104 Ymax	B120 Emax	B120 Ymax
6	1.2	3.3	1.7	4.0	1.8	4.1	2.1
8	1.6	3.3	1.4	4.0	1.6	4.1	1.8
10	2.0	3.3	1.3	4.0	1.4	4.1	1.6
12	2.4	2.9	1.2	4.0	1.3	4.1	1.5
14	2.8	2.6	1.1	3.5	1.2	4.1	1.4
16	3.2	–	–	3.2	1.1	4.1	1.3
18	3.6	–	–	3.0	1.1	4.1	1.2
20	4.0	–	–	2.8	1.0	3.8	1.1
25	5.0	–	–	2.4	0.9	3.3	1.0
30	5.7	–	–	–	–	2.9	0.9
35	6.3	–	–	–	–	2.6	0.9

Fractional rigs, Emax and Ymax (m)

RM 30° (kNm)	Displ. (tonnes)	B087 Emax	B087 Ymax	B104 Emax	B104 Ymax	B120 Emax	B120 Ymax
6	1.2	3.3	1.4	4.0	1.6	4.1	1.8
8	1.6	3.3	1.2	4.0	1.4	4.1	1.6
10	2.0	2.8	1.1	3.7	1.2	4.1	1.4
12	2.4	2.5	1.0	3.3	1.1	4.1	1.3
14	2.8	2.2	0.9	3.0	1.0	4.1	1.2
16	3.2	2.0	0.9	2.7	1.0	3.7	1.1
18	3.6	–	–	2.5	0.9	3.4	1.0
20	4.0	–	–	–	–	3.2	1.0
25	5.0	–	–	–	–	2.7	0.9

Complete booms for slab reef or Single Line Reef

Art. no.	Boom section	Emax (mm)	Remarks
BS087-01	B087	3365	Outhaul (2:1) + 2 reefs, aft
BS087-21	B087	3365	Outhaul (4:1) + 2 reefs, cleat
BS087-61	B087	3365	Outhaul (2:1) + 2 Single Line Reef, aft
BS104-01	B104	3515	Outhaul (2:1) + 2 reefs, aft
BS104-02	B104	4015	Outhaul (2:1) + 2 reefs, aft
BS104-21	B104	3515	Outhaul (4:1) + 2 reefs, cleat
BS104-22	B104	4015	Outhaul (4:1) + 2 reefs, cleat
BS104-61	B104	3515	Outhaul (2:1) + 2 Single Line Reef, aft
BS104-62	B104	4015	Outhaul (2:1) + 2 Single Line Reef, aft
BS120-02B	B120	3640	Outhaul (3:1) + 2 reefs, aft
BS120-03B	B120	4040	Outhaul (3:1) + 2 reefs, aft
BS120-22	B120	3635	Outhaul (3:1) + 2 reefs, cleat
BS120-23	B120	4135	Outhaul (3:1) + 2 reefs, cleat
BS120-62B	B120	3540	Outhaul (3:1) + 2 Single Line Reef, aft
BS120-63B	B120	4040	Outhaul (3:1) + 2 Single Line Reef, aft

When fitting a Selden boom to a mast of another brand, check the existing toggle dimensions for compatibility (B087/B104: A 8, B 8, C 16 mm; B120: A 14, B 10, C 20 mm). Boom brackets by mast section are on pages 46–47.

Rodkicker and Kicking Strap

The Rodkicker choice is based mainly on the righting moment and the rig type (masthead or fractional). The gas spring strength depends on boom weight (including the stowed sail) and the Rodkicker angle; the gas spring table by boom height (XBH) and foot length is on page 51.

	Type 05	Type 10
Max. righting moment, fractional rig	12.5 kNm	25 kNm
Max. righting moment, masthead rig	15.0 kNm	35 kNm
Max. displacement, fractional rig	2.5 tonnes	5 tonnes
Max. displacement, masthead rig	3.9 tonnes	6 tonnes
Current Seldén boom section	B087-B120	B087-B152
Previous Selden/Kemp boom section	86/59-111/75	86/59-111/75, 128/90
Height of boom (XBH)	< 900 mm	≤ 1100 mm
Min. length (L)	1150 mm	1360 mm
Without gas spring	058-036-05	058-036-10
With gas spring (normal)	058-036-06 (0.7 kN)	058-036-11 (0.6 kN)
With gas spring (hard)	–	058-036-12 (1.2 kN)
With gas spring (extra hard)	–	058-036-16 (2.5 kN)
Safe working load	8 kN	12 kN
Supplementary kit, normal gas spring	308-038-03 (0.7 kN)	308-070-03 (0.6 kN)
Supplementary kit, hard gas spring	–	308-071-04 (1.2 kN)
Supplementary kit, extra hard gas spring	–	308-072-05 (2.5 kN)
Lower fitting	A = 9, Ø B = 10, C = 20, clevis pin 165-207	A = 9, Ø B = 10, C = 20, clevis pin 165-207
Upper fitting	S = 7, Ø T = 10, W = 12, clevis pin 165-205	S = 7, Ø T = 10, W = 12, clevis pin 165-205

Kicking strap tackle is not included with the Rodkicker. The Rodkicker doubles the purchase of your kicking strap: a 4:1 tackle gives 8:1 in total.

Art. no.	Tackle	Max RM 30° (kNm)	Approx. displacement (tonnes)
400-005-02R	Kicking strap tackle 4:1, operation at the mast: PBB50 blocks, 10 m of Ø 8 mm PE rope	9	1.8	View part →
400-005-01R	Kicking strap tackle 4:1, operation from the cockpit: PBB50 blocks, 10 m of Ø 8 mm PE rope	9	1.8	View part →
400-006-02R	Kicking strap tackle 4:1, operation at the mast: PBB60 blocks, 12 m of Ø 10 mm PE rope	16	3.2	View part →
400-006-01R	Kicking strap tackle 4:1, operation from the cockpit: PBB50/60 blocks, 12 m of Ø 10 mm PE rope	16	3.2	View part →
400-004-02R	Rodkicker tackle 4:1, operation at the mast: BBB40 blocks, 12 m of Ø 7 mm PE rope	16	3.2	View part →
400-004-01R	Rodkicker tackle 4:1, operation from the cockpit: BBB40 blocks, 12 m of Ø 7 mm PE rope	16	3.2	View part →
400-005-02R	Rodkicker tackle 4:1, operation at the mast: PBB50 blocks, 10 m of Ø 8 mm PE rope	26	5.2	View part →
400-005-01R	Rodkicker tackle 4:1, operation from the cockpit: PBB50 blocks, 10 m of Ø 8 mm PE rope	26	5.2	View part →

Selecting the Right Pole

Find your displacement or righting moment (RM) at 30° heel, then read right for the first value exceeding your SPL (maximum spinnaker pole length, often but not always equal to J). Example from the catalogue: displacement 2.8 tonnes, SPL 3000 mm → S060. A whisker pole should be approximately as long as the foot of the sail you intend to pole out.

Aluminium spinnaker pole selection, max. SPL (mm)

RM 30° (kNm)	Displ. (tonnes)	S038	S048	S050	S060	S063
2	0.5	3120	–	–	–	–
3	0.7	2900	–	–	–	–
4	0.9	2650	–	–	–	–
5	1.0	2450	–	–	–	–
6	1.2	2250	–	–	–	–
7	1.4	2050	–	–	–	–
8	1.6	1910	3000	–	–	–
9	1.8	1820	2850	–	–	–
10	2.0	1720	2700	–	–	–
12	2.4	1600	2500	2470	3600	3120
14	2.8	–	2400	2470	3500	3120
16	3.2	–	2350	2470	3400	3120
18	3.6	–	2300	2470	3300	3120
20	4.0	–	–	2470	3200	3120
25	5.0	–	–	2320	3000	3120
30	5.7	–	–	2200	2850	3080
35	6.3	–	–	–	2730	2900
40	7.0	–	–	–	2600	2750

Selections assume the downhaul is attached via a bridle or at the outboard end; with a central downhaul attachment go one size up. S038, S048 and S060 are parallel; S050 and S063 are tapered (S050: SPL 2180–2470 mm; S063: SPL 2520–3120 mm).

Aluminium whisker pole selection, max pole length (mm)

RM 30° (kNm)	Displ. (tonnes)	S048	S060
12	2.4	3200	–
14	2.8	3200	–
16	3.2	3200	–
18	3.6	3200	–
20	4.0	3150	4700
25	5.0	2800	4700
30	5.7	2550	4700
35	6.3	–	4400
40	7.0	–	4100
45	7.7	–	3800
50	8.2	–	3650

Carbon spinnaker pole selection, max. SPL (mm)

RM 30° (kNm)	Displ. (tonnes)	SC047	SC059	SC061
8	1.6	2580	–	–
10	2.0	2610	3710	–
12	2.4	2430	3450	4490
14	2.8	2280	3420	4220
16	3.2	2160	3070	4000
18	3.6	2070	2930	3820
20	4.0	–	2810	3660
25	5.0	–	2750	3350
30	5.7	–	2390	3110
35	6.3	–	–	2930

Carbon whisker pole selection, max pole length (mm)

RM 30° (kNm)	Displ. (tonnes)	SC047	SC059	SC061
8	1.6	3700	–	–
10	2.0	3700	5230	5230
12	2.4	3580	5100	5230
14	2.8	3380	4800	5230
16	3.2	3200	4550	5230
18	3.6	3060	4340	5230
20	4.0	2930	4160	5230
25	5.0	2680	3810	4950
30	5.7	2480	3540	4600
35	6.3	2340	3330	4330
40	7.0	2210	3150	4100
45	7.7	–	3000	3920
50	8.2	–	2880	3750
55	9.0	–	–	3610

Telescopic pole 060-060-58 (Ø 48/60 mm, RM 18 kNm, 3.6 tonnes) has a min. length for stowage of 2530 mm, spinnaker pole position 3000 mm, whisker pole 3600 mm (heavy conditions) and 4500 mm (light conditions). Pole kits, bridle kits and mast/boom stowage fittings are on pages 62–64.

Choose the Right Furlex (50S)

Furlex 50S is supplied as a complete kit for boats 18-26 ft, including forestay wire, halyard lead, stanchion block, prefeeder and furling line. Single groove extrusion for 5 mm luff tape.

Forestay Ø (mm)	Max RM masthead (kNm)	Max RM fractional (kNm)	Displ. masthead (t)	Displ. fractional (t)	DH (mm)	DW (mm)	DD (mm)	CB (mm)	E (mm)	Halyard sheave box
4	6.5	8	1.4	1.7	100	60	120	25	215	505-004-10
5	8.5	11	1.8	2.5	100	60	120	25	215	505-004-10

Furlex system	Forestay Ø (mm)	Max forestay length FL (m)
022-015-51	4	7.7	View part →
022-015-52	4	10.1	View part →
022-015-53	5	7.7	View part →
022-015-54	5	10.1	View part →
022-015-55	5	12.5	View part →

Luff groove: internal diameter (DLG) 6.0 mm, width (WLG) 2.6 mm.

Art. no.	Toggle
174-102-01	Eye/fork toggle, 4 mm forestay (lengthens a Furlex system)	View part →
174-103-01	Eye/fork toggle, 5 mm forestay	View part →
517-056-02	Standard Furlex fork/fork toggle, 4 mm forestay	View part →
517-054-02	Standard Furlex fork/fork toggle, 5 mm forestay	View part →
174-127-01	T/fork toggle, 4 mm forestay (connects Furlex to a Seldén backing plate for T-terminals)	View part →
174-128-01	T/fork toggle, 5 mm forestay	View part →
517-065-01	Stemball/eye toggle with fork/fork toggle, 5 mm forestay (some masts of other origin)	View part →