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Search: Posts Made By: kmacdonald
Forum: Construction, Maintenance & Refit 26-11-2018, 14:51
Replies: 47
Views: 7,183
Posted By kmacdonald
Re: Steering sheaves / pulleys

If you up the cable size you more than likely need to up the sheave size also. As the cable size increases, the CRITICAL bending radius increases also. If the sheaves don't meet the minimum radius...
Forum: Construction, Maintenance & Refit 25-11-2018, 15:41
Replies: 47
Views: 7,183
Posted By kmacdonald
Re: Steering sheaves / pulleys

Rudder loads and force on the steering cable are two different animals and not the same. Forget the math and copy a well proven Edson design on a similar boat.
Forum: Construction, Maintenance & Refit 25-11-2018, 15:37
Replies: 47
Views: 7,183
Posted By kmacdonald
Re: Steering sheaves / pulleys

I know this is a little off topic but is close enough. The Edson "adjustable crossed wire idler" (776AL-4AL) sheave assembly was originally made with a steel base that would rust if the pedestal...
Forum: Construction, Maintenance & Refit 25-11-2018, 14:00
Replies: 47
Views: 7,183
Posted By kmacdonald
Re: Steering sheaves / pulleys

Bear Sheaves: Wire Rope Sheaves - Bear Equipment Inc. (https://www.bearequipment.com/)

Make sure you use the correct diameter sheave for the diameter wire you are using. It is CRITICAL to prevent...
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