Jump to content

What happened here?


frumpy
 Share

Recommended Posts

Thanks! :)

I wonder - whats the rational behind this? Gear out, just in case I get pushed down and hit the surface?

Not changing the nose-down drag of the gear, so the nose does not get too high?

I mean I can imagine not changing flap position gives a speed margin if the speed drops,

but leaving out the gear... hmm.

Link to comment
Share on other sites

From FAA advisory on windshear;

Quote

Maintain flap and gear position until terrain clearance is assured. Although a small performance increase is available after landing gear retraction, initial performance degradation may occur when landing gear doors open for retraction.  

 

  • Upvote 1
Link to comment
Share on other sites

Yes - but this does not apply for the 737 as it has no geardoors that would extend when trying to raise the gear (all gear doors and fairings are already extended when the gear is extended). But I think they also keep the windshear procedures the same to maintain commonality with other types - so transferring to another aircraft would not require to relearn this procedure in such a substantial way.

Jan

 

Link to comment
Share on other sites

1 hour ago, Litjan said:

Yes - but this does not apply for the 737 as it has no geardoors that would extend when trying to raise the gear (all gear doors and fairings are already extended when the gear is extended). But I think they also keep the windshear procedures the same to maintain commonality with other types - so transferring to another aircraft would not require to relearn this procedure in such a substantial way.

Jan

 

Right (except nose gear doors, and there is upwash there..), but also the gear itself will create more drag while being retracted (closer to the fuselage/wing) than extended, causing separation/interference drag etc. and this would take place during the time while the situation might be in it's most critical phase.  Even on the 737 you can feel the vibrations (atleast in the cabin) from this just as the gear leaves/enters the wheel well :)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...