3
$\begingroup$

I am currently modelling an aero engine and require the weight breakdown of the individual components, I have the dry weight of the engine and need to verify the pylon and nacelle weight.

Raymer has presented an equation for the weight of the installed engine in his book $$W_{InstalledEngine} = 2.575 *(W_{Engine})^{0.922}*N_{engine}$$

Does this include the pylon?

|improve this question
$\endgroup$
  • 1
    $\begingroup$ The equation is probably a (nonexact) curve fit to some data. So you have some variation around the equation to start off with. The error from the pylon (either way) weight could be insignificant, so you might as well ignore it. Just my opinion. $\endgroup$ – jjack Nov 30 '18 at 10:37
  • $\begingroup$ Nengine is the number of engines on the aircraft. $\endgroup$ – martin Nov 30 '18 at 10:43
0
$\begingroup$

No, it doesn't include the pylon. If you think about it, the engine is installed on the pylon, which is part of the aircraft's fuselage or wing structure and not part of the engine.

You can see what I mean by watching this video of the replacement of an engine on an American Airlines 777.

Raymer's equation does include the nacelle and other auxiliary equipment installed on the engine.

|improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.