What is Running Backstays?
Running backstays (sometimes called runners or checkstays) are adjustable backstays that run from high on the mast down to the deck, usually through blocks or tackles for easy adjustment. Unlike permanent backstays, runners must be tensioned on the windward side and released on the leeward side when tacking.
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What it is
Running backstays (sometimes called runners or checkstays) are adjustable backstays that run from high on the mast down to the deck, usually through blocks or tackles for easy adjustment. Unlike permanent backstays, runners must be tensioned on the windward side and released on the leeward side when tacking. They're commonly found on performance oriented sailing boats, masthead cutters, or boats without permanent backstays. The system typically includes wire or high-tech line, blocks for mechanical advantage, and cleats or winches for securing.
What it does
Running backstays support the mast from aft and control forestay tension and mast bend, similar to a permanent backstay. They must be adjusted with each tack. The leeward runner must be released before tacking or jibing to allow the boom to swing across, while the new windward runner must be immediately tensioned after the tack.
Why it matters
Tacking or jibing without properly releasing the leeward runner can result in the boom crashing into the runner, causing injury, gear damage or even dismasting. Forgetting to set the windward runner after a tack leaves the mast inadequately supported, risking mast failure if the boat is pressed hard. Failed runner hardware or technique has caused dismasting.
General Maintenance
Inspect runner wires or lines seasonally for broken strands, chafe, and UV damage. Check all blocks for smooth operation and worn sheaves. Verify terminal fittings for cracks or corrosion. Test releases and tensioning systems regularly to ensure they operate smoothly under load. Lubricate blocks annually. Check mounting points on deck for security and backing. Ensure cleats or winches hold runners securely without slipping. Practice runner handling procedures with all crew members regularly. Check that runners have sufficient length for all points of sail.
Common Issues
- Crew forgetting to release leeward runner before tacking or gybing
- Failure to tension windward runner after tack, leaving mast unsupported
- Blocks seizing, making adjustment difficult or impossible
- Wire or line chafing where it passes through blocks
- Chafed runner tails
- Insufficient mechanical advantage making proper tensioning difficult
- Runners interfering with sail trim or movement around deck
- Cleats or winches inadequate to hold runners under load
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