The International Cessna^® 170 Association

does any one that has recently installed their wing struts, have a service bulletin source or know what the initial length setting of the aft wing strut on a rag wing is. nick

Length of C-170 (ragwing) struts –

Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94.47 inches
Rear . . . . . . . . . .......................... . . . . . . . . . . . 106.58 inches


The length of the struts is measured from centerline to centerline of the bolt holes. The wing can be set in place with the strut installed, and any additional rigging required due to wing heaviness after test flight should be rigged out by lengthening the rear strut on the light wing one rotation at a time. In doing so, there is one caution; namely, double check the length of thread engagement in the strut adjustment. This can be done by checking the safety hole in the fitting made for that purpose. If a wire will not go through the hole, the thread length is satisfactory. This information was taken from Cessna service letter S.L.N. 49 dated 9-26-47 and a letter from Cliff Ives dated 8 December 1994. (and thanks to Tom Hall.)

Hope this helps- George

Thanks George and Tom, thats what I was looking for! nick