Landing Gear Retraction — Tech Ops Forum

Sponsor Message:


My Starred Topics \| Profile \| New Topic \| Forum Index \| Help \| Search

Landing Gear Retraction

Tangoecho From United Kingdom, joined May 2004, 127 posts, RR: 2
Posted (8 years 3 months 3 weeks 16 hours ago) and read 2357 times:

When an aircraft has just taken off and the gear is retracting, does the pilot apply the brakes??
Or does the wheels just keep spinning in the gear wells until they come to a stop themselves??

Just curious

Stu...

Contact Aberdeen tower on 118.10 G'day.

8 replies: All unread, jump to last

Pilotaydin From Turkey, joined Sep 2004, 2498 posts, RR: 50
Reply 1, posted (8 years 3 months 3 weeks 15 hours ago) and read 2325 times:

on some a/c it is a highly recommended procedure in order to stop any debris or pieces that are rotating at high speed to be inside the bay. I was told by older pilots that older planes needed this done to stop vibrations right after liftoff

hope this helps

The only time there is too much fuel onboard, is when you're on fire!

Flyer737sw From United States of America, joined Oct 2004, 125 posts, RR: 2
Reply 2, posted (8 years 3 months 3 weeks 15 hours ago) and read 2284 times:

Photo © John Miller

Kevin

DeskPilot From Australia, joined Apr 2004, 767 posts, RR: 0
Reply 3, posted (8 years 3 months 3 weeks 14 hours ago) and read 2278 times:

".. sort of layered pads that slow down the spinning wheels .."

I thought that was to form a seal with the wheels, given there's no main gear doors on type 737 ? Can someone confirm ?

By the way, is there anyone on board who knows how to fly a plane?

SlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 71
Reply 4, posted (8 years 3 months 3 weeks 14 hours ago) and read 2275 times:

Most large complex airplanes, like airliners this function is automatic. As the pressure is ported to the Retract side of the hydraulic cylinder, for example, the return fluid from the Extend side may be used to apply the wheel brakes. Another issue is increased diameter due to high rotational speed.

The nosewheels usually just have belt type snubbers to stop the tires.

Happiness is not seeing another trite Ste. Maarten photo all week long.

CCA From Hong Kong, joined Oct 2002, 708 posts, RR: 14
Reply 5, posted (8 years 3 months 3 weeks 13 hours ago) and read 2249 times:

DeskPilot, you are correct.

CCA

C152 G115 TB10 CAP10 Be76 C500 A330-300 A340-300 -600 B747-200F -200SF -400 -400F -400BCF -400ERF -8F

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 6, posted (8 years 3 months 3 weeks 8 hours ago) and read 2199 times:

On 737's there are some sort of layered pads that slow down the spinning wheels while they retract into the gear bay...Not sure on the terminology but they are there...The pic below might speak for itself...The pads are on the perimeter of the opening into the wheel well...Hope this helps...

Thats Totally Incorrect,The Wheel Well seal in the MWW only prevents Airflow into the Wheel well After gear retraction to assist in Noise reduction due to Airflow mvmt.
The Main Gears when retracted are Autoretractbraked thru the Brake Metering valve that ports Hyd Brake flud to the Main wheel brakes when Gears are retracted.The Wheels are stationary when retracted.
On the NWW for the Nose wheels to stop rotation there are Snubber pads that rub against the Nose wheel tire to Stop its rotation.
regds
MEL

Think of the brighter side!

Tangoecho From United Kingdom, joined May 2004, 127 posts, RR: 2
Reply 7, posted (8 years 3 months 3 weeks 6 hours ago) and read 2181 times:

Thanks for your replies guys..

It's just one of those things I wonder about.

Cheers Big thumbs up

Stu...

Contact Aberdeen tower on 118.10 G'day.

BALandorLivery From UK - England, joined Jan 2005, 358 posts, RR: 1
Reply 8, posted (8 years 3 months 2 weeks 6 days 23 hours ago) and read 2180 times:

Some a/c apply brakes automatically when the wheels are selected up.

I know that concorde did.

The reason is, and I quote from a concorde engineer:

"to stop any gyroscopic effects from the wheels spinning fast when they enter the wheel well"

Hope this helped.

Regds.

Top Of Page

Forum Index

Reply To This Topic Landing Gear Retraction

Username:	No username? Sign up now!
Password:	Forgot Password? Be reminded. Remember me on this computer (uses cookies)

Tech/Ops related posts only!
Not Tech/Ops related? Use the other forums
No adverts of any kind. This includes web pages.
No hostile language or criticizing of others.
Do not post copyright protected material.
Use relevant and describing topics.
Check if your post already been discussed.
Check your spelling!
DETAILED RULES

Check Spelling

Please check your spelling (press "Check Spelling" above)

Similar topics: