Harken Yacht Equipment Catalog OnLine

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Midrange Blocks > Mid-Range Use Chart

Hardware specifications are for monohulls of moderate displacement.

Note: Multihulls and heavy displacement monohulls should reduce the maximum sail areas shown by as much as 25%. Please contact Harken if you have questions about hardware suitability.

Mainsheet

	Maximum mainsail area
		ft²	m²
End-Boom System	Single Attachment	500	46
	Multiple Attachment ¹	540	50
Mid-Boom System	Single Attachment	425	39
	Multiple Attachment ¹	500	46

¹ - Multiple attachment assumes more than one load carrying shackle on both the boom and traveler car or deck.

Genoa

	Maximum genoa area
		ft²	m²
	Maximum 100% foretriangle sail area
Turning Blocks	180° Deflection	150 ²	14 ²
	Maximum 100% foretriangle sail area
Turning Blocks	90° Deflection	215 ²	20 ²

² - Assumes maximum deflection of 45°

Spinnaker

	Maximum spinnaker area
		ft²	m²	ft²	m²
	Maximum 100% foretriangle sail area
Sheet Blocks	Plain	1100	100	1300	120
Sheet Blocks	Ratchet	900	83	-	-
Afterguy Blocks	Mounted Amidships	1100 ³	100 ³	1250 ³	115 ³
	Mounted on Transom	900	83	1000	93
	Maximum "I" dimension
Mashead Halyard Block		48 ft	14.6 m	53 ft	16m

³ - Assumes maximum deflection of 45°

Mast Base


	ft	m	ft	m
	Standard blocks		Hi-load blocks
Main Halyard Lead Block	Maximum "P" dimension
	48	14.6	52	15.8
Genoa Halyard Lead Block	Maximum "I" dimension
	46	14	50	15.3
Mashead Halyard Block	Maximum "I" dimension
	48	14.6	53	16

Running Backstay

	Maximum runner wire breaking strength
		lb	kg	lb	kg
		Standard blocks		Hi-load blocks
Flying Block 2:1 System		3600	1633	4600	2086
Desk Block	1:1	2200	998	2800	1270
	2:1 Becket	3600	1633	3600	1633
	2:1 Single	4500	2040	5000	2268

Vang

	Maximum mainsail area
	ft²	m²
Fiddle Block	400	37
Triple Block	450	42

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