This 4:1 system is commonly used on dinghies and small sports boats with a traveller. The traveller allows accurate trimming, particularly in light air upwind, or on a reach where you want to close the leech without using the vang. Typically boats like this would use traveller car RC11905 on RC1190 track.
MWL = 400kg (880lb)
Max Line Size = 10mm (3/8")*
*RF6 max line 8mm (5/16")
VARIATIONS Die-hard racers can replace the forward RF48109 and the RF48109 on the traveller with RF35109HL to reduce windage, however a tapered sheet would need to be used. Purchase can be increased as required by changing blocks to doubles etc if needed.