Airnet
Member
- Joined
- Nov 13, 2020
- Messages
- 24
- Vessel Name
- Valhalla
- Vessel Make
- West Bay
I've been searching for months to find an answer on appropriate stern tie line size. I'm pretty sure the yellow polypropylene line I had for our last boat was undersized. We upsized boats last summer, so now I need a larger stern tie line. The question is: how strong (breaking strength) is correct? There must be a simple formula for boat weight vs breaking strength. I love it when someone says, "Figure out your weight and windage, and there you go". Great, how do you calculate windage? What do you do with those numbers vs line strength? I've talked to Anacortes Rigging, and they said 5/8 Samson MFP "but that won't be strong enough if it gets windy out." He also said don't use Dyneema. Why not??? A buddy with a 92' loves Dyneema for stern tie line.
The only answers I've been getting are more 'feelings'. "That should be good" or "That will work if it doesn't get too windy."
The only concrete info I can gather is using our anchor chain strength. I know the stern tie line doesn't need to be that strong.
Anyone know where to find the official formula, boat weight vs stern tie line breaking strength?
We are 75k lbs, 58' water line, 63' overall.
Any info would be helpful.
Thanks,
Curt
The only answers I've been getting are more 'feelings'. "That should be good" or "That will work if it doesn't get too windy."
The only concrete info I can gather is using our anchor chain strength. I know the stern tie line doesn't need to be that strong.
Anyone know where to find the official formula, boat weight vs stern tie line breaking strength?
We are 75k lbs, 58' water line, 63' overall.
Any info would be helpful.
Thanks,
Curt