This air may be fed by an Auxiliary Power Unit (APU) or a Ground Start Unit. As discussed above, the N2 compressor needs to be rotated to start a jet engine. To do so, air needs to be sent to the air ...
In July, Pratt & Whitney announced it had completed the F135 ECU's preliminary design review which signified the alignment between Pratt & Whitney and the F-35 Joint Program Office on the upgrade's ...