Bipod Mast Force Analysis:

angle of mast

angle of side stay

wind force estimate:

initial guess values:

balance of force and moment equations:

moment about windward mast anchor point

stay tension (total for both stays):

tension in windward mast spar:

compression of leeward mast spar:

Conclusions:

Side stays only need to support longitudinal forces on rig ~550 max each. They can be made from 7/64" Amsteel rated for 1,200 (purchase from layline.com)

Mast spars should be designed to support ~750 lbs in both compression and tension without significant deflections

alternate moment balance eqn:

Longitudinal stay tension estimate:

distance from rear stay tang to mast tang

rear stay angle with deck

horizontal force per stay

tension in each stay

Mast design against buckling:

Design buckling load:

material properties (carbon fiber "cf"):

mast cross section geometry:

length required

price

cost

per mast

weight