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Date:  8-29-2008
Number of Hours:  2.00
Manual Reference:  
Brief Description:  secondary gear door hydrulic cylinder

The phd rep and engineer visited today for a final design session on the gear door cylinders - the goal hear was to open the gear door directly via a cylinder . The main concern is to prevent loads being placed on the root rib . Its just a matter of geometry and stroke length . After everything was entered into a cad program it was determind a scv 3/4 x 3 inch stroke would work well with some margin for adjustment. The S in the cylinder identification stands for "internal spring in the cap end" of the ram, this will open the secondary gear door in a hydrulic pressure failure. Lancaire is using the same method with an external spring - the external spring adds bulk to the unit - the internal spring adds length which in this application is needed .
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