Patent ID: 7171868

Claim:
A free wheel unit for a rotary wing aircraft comprising: an engine input gimbal; an input gear driven about an input axis by said engine input gimbal; a bull gear which rotates about a second axis, said bull gear in meshing engagement with said input gear; a cam shaft driven by said bull gear; an integrated drive housing gear supported for relative rotation to said cam shaft through a clutch roller and a bearing assembly, said bearing assembly comprising an inner race; an outer race; and a multiple of bearing elements between said inner race and said outer race, said multiple of bearing elements including a first multiple of bearing elements in which each of the first multiple of bearing elements are spaced by a different resultant spacing angle therebetween and a second multiple of bearing elements in which each of the second multiple of bearing elements are spaced by the different resulting spacing angle which mirrors the different resultant spacing angle of said first multiple of bearing elements, said first multiple of bearing elements and said second multiple of bearing elements each defining a bearing spacing described by the formula: Si=T *Ni*U, where T is a cage web thickness; Ni is the bearing element number from an original bearing element; and U is a predefined increment; a driven pinion which rotates about a third axis, said driven pinion in meshing engagement with said integrated drive housing gear; and an output gimbal driven by said driven pinion.