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Oil supply failure - Propeller:
To prevent an overspeed caused by an oil supply failure, one of two methods may be employed:
• Hydraulic lock valve The pitch lock mechanism houses a valve called the 'hydraulic lock valve'. This is a spring loaded ball valve opened by fine pitch oil pressure and closed by a spring. In the event of an oil supply failure the hydraulic lock valve closes and acts like a non-return valve to trap coarse pitch oil in the pitch change cylinder. The oil trapped in the cylinder prevents centrifugal twisting movement (CTM) from turning the propeller blades towards fine pitch without affecting the feathering ability if the propeller.
• Mechanical locking device A rachet mechanism allows the propeller to move to coarse pitch and to be feathered. The Pawl has to be withdrawn by P.C.U. action before the blades can move to a finer pitch.
A pump delivers 40 lpm to a 100 mm bore/25 mm rod cylinder to move a load of 22 kN. A throttle is introduced on the rod end, and return flow with a 10 lpm flow rate. A 70 bar press
biogeochemical cycle
The Task: This project is a 50% of the whole assessment of the course. You are required to assess a life cycle of a product from raw materials, through the supply chain, manufa
Internal rate of return IRR In case of IRR method cash flow are analyzed taking into account the magnitude and the timing. IRR is that discount rate which gives a net present value
Safe Operating Range The SOR is the max distance between airfields which the aircraft can fly with full allowance for headwind, diversion, stacking. • Distance flown in climb
Composites have low shear strengths compared to longitudinal strengths. The ILSS test is a simple 3 point bend test, requiring a small amount of material. A span to depth ratio
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5. From the following details you are required to make an assessment of the average amount of working capital requirement of Hindustan Ltd. Particulars Average period of credit E
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Thrust calculation: The amount of thrust produced depends upon two things:- The MASS of air which is moved rearwards in a given time, the ACCELERATION imparted to the air.It
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