Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Double acting propellers:
This type of propeller is normally fitted to larger engine and, because of engine requirements, is more complicated than the propellers fitted to smaller engines. Construction is similar to that of the single acting propeller, the hub supporting the blades, and the cylinder housing the operation piston. In this case, however, the cylinder is closed at both ends, and the piston is moved in both direction by oil pressure. In one type of mechanism links from the annular piston pass through seals in the rear end of the cylinder, and are connected to a pin at the base of each blade. In another type of mechanism, the piston is connected by means of pins and rollers to a cam track and bevel gear, the bevel gear matching with a bevel gear segment at the base of each blade; axial movement of the piston causes rotation of the bevel gear, and alteration of the blade piston causes rotation of the bevel gear, and alteration of the blade angle. Operating oil is conveyed to the propeller mechanism through concentric tubes in the bore of the engine reduction gear shaft. And another type Fig, has the blades connected by links to the cylinder which moves with the piston held stationary.
The piston may move in the cylinder or the cylinder may move over the piston, the linear movement being transmitted to the blades by various linkages to convert it to rotary motion.
The geared, or hydromatic, pitch change mechanism utilises a piston inside a stationary cylinder. The piston is 'U' shaped to contain a pair of co-axial cylindrical cams. The outer cam is fixed and the inner is free to turn. This carriers a bevel gear which meshes with bevel gear segments on the blade roots.
• ''Discussed Since the promised return on Russian government debt is much higher than the promised return on US government debt, you should invest your money in Russia
Q. What do you mean by diffraction? Distinguish between Fresnel's and Fraunhofer's classes of diffraction. Ans. The phenomena of diffraction in case of light was first observ
In the Aircraft Performance course, the aircraft was assumed to be in a steady-state (e.g. steady cruise, climb, turn, glide), with the forces and moments balanced. The subject of
draw diagonal scale of rf 1/500 and show 57.5m on it
Dynamic balancing principles: We must all be familiar with the effects of unbalance in one form or another, but perhaps the most common effect is that arising from wheel unbala
A blade cascade is a row of evenly space yp dentical blades. Approximates to a turbomachinery rotor or stator if the radius the annulus is large compared with the bl the annulus is
Q. Explain various stages of creep? Ans. CREEP: Creep can be defined as the process by which plastic flow occurs when a constant stress or load is applied to a material for a
Compute the motor size required to pump 28.3 cms through a 3,050 m long, 3.66 m diameter pipeline to an upper reservoir 610 m above the lower reservoir. Use a friction facter of 0.
how to design a circural form tool on drawing sheet?
Q. Describe the structure of grain boundary. Ans. One phase of metal contains many grains of various orientation, the individual crystals are called grains. Thus a grain is
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd