Abstract: Two (or more) components must be aligned to each other in the pitch, roll, and azimuth axes. One component is adjustable relative to the other non-adjustable component. The pitch and roll angles are measured with a high accuracy digital protractor. The readings are taken from fixed reference points on the non-adjustable and the adjustable components, and the position of the adjusting component is modified until the pitch and roll of the adjusting component matches the pitch and roll of the non-adjusting component. The azimuth angle is measured by using two line generating lasers, one that produces a visible azimuth axis on the non-adjustable component and the other which produces the visible azimuth axis on the adjustable component. The separation of the two lines is measured such that one measurement is in close proximity to the laser generators and the other is at a distance from the laser generators.

Abstract: The alignment of two pieces of machinery is achieved so that centerlines of rotating shafts of each piece are in-line.

Abstract: The drive shaft assembly has a variable length. Each end of the drive shaft assembly has a flange for attaching to whatever is intend thereon such as a gear box drive or fan mount, and a female threaded attachment on the opposite side of the flange. A slide is secured in this attachment. The slide has a bore therein with longitudinal ball bearing races partially along the length of the wall. Each end of the shaft has opposing ball bearing races as compared to those in the slide and has further thereon an o-ring retainer. A sufficient number of ball bearings are placed in each race to allow for movement of the shaft in the slide. The o-ring is placed on the shaft after the bearings are inserted. After this the slide is secured to the flange.

Abstract: The invention is a helicopter blade crack detection system for blades that are hollow and pressurized or evacuated to a low pressure A rotating assembly having a rotating indicator assembly photo-optically communicates to an airframe detection assembly providing high reliability, ease of maintenance, and EMI secured.