The truss structure w$/$c is represented is a wing drag bracing truss subjected to chordwise load w$/F_1{F}_4$ represents the front spar of the wing; $R_1{F}_2,R_2{F}_3,$&$R_3{F}_4$ the drag brace wires; $R_2{F}_2$ & $R_3{F}_3$ the drag struts; and $R_1{R}_3$ the rear spar.

Neglecting the weights of each member, determine:

Reactions $R_F,R_R$ & $R_C.(15$ pts$)$

Reactions of the front spar $F_1{F}_2,$ drag brace wire $R_1{F}_2,$ & rear spar $R_1{R}_2.(30$ pts$)$

Axial stresses of the front spar $F_1{F}_2,$ drag brace wire $R_1{F}_2,$ & rear spar $R_1{R}_2.(15$ pts$)$ Front spar area: $2$ in ${?}^2$

Drag brace wire: $1\mathrm{.}75i{n}^2$

Rear spar area: $1\mathrm{.}5$ in ${?}^2$

Factors of safety of the front spar $F_1{F}_2,$ drag brace wire $R_1{F}_2,$ & rear spar $R_1{R}_2$ if the maximum allowable axial tensile stress is $15000$ psi & the maximum allowable axial compressive stress is $10000$ psi. $(15$ pts$)$