and K for low-aspect-ratio, cruciform wingbodies with clipped delta fins for Mach numbers from 3 to 4 and angles of attack up to 20 deg. The ratios of fin span to body radius (S/R) range from 1.3 to 2, so that aspect ratios vary from 0.05 to 4 and taper ratios vary from 0 to 0.975. Euler results compare well with experimental data. At low angle of attack KW(B) is of the order of 1.5 for low-aspect-ratio fins. KW(B) decreases as the angle of attack increases and can be less than 1 at large angles of attack. Shock and expansion waves from the fin interact with the body and strongly influence ##(w> The afterbody length beyond the fin trailing edge also contributes to KB(W)* As the aspect ratio decreases from 4 to 0.05, KB(\Y) increases to a maximum value and then 1) decreases for small angles of attack and 2) remains fairly constant for large angles of attack. K^ is calculated for sideslip angles of ±3 deg. Euler predictions of K are larger than slender-body predictions, because of vortex effects. K^ is also influenced by shock and expansion waves from adjacent fins. At small angles of attack K^ is larger for negative sideslip than it is for positive sideslip. At large angles of attack K^ becomes independent of the sign of sideslip angle.