A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Landing gear adjustment



 
 
Thread Tools Display Modes
  #1  
Old August 14th 19, 06:02 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 394
Default Landing gear adjustment

I just finished replacing a rubber roller in my Genesis-2 nose gear, which I won’t go into because most gliders only retract the main gear. After the nose gear was operating properly, I checked the main gear down lock by shoving forward on the drag links to check it didn’t move more than about 15mm, then snapped back into over-center..........I did this check with the fuselage in the trailer saddle. If the over-center did move more than 15mm, I would have adjusted the drive to give more down (1 turn at a time) until the down lock passed the check.
Next I retracted the gear and checked that the wheel retracted enough to be about 10mm above the closed gear doors. If the wheel is too close to the doors, the doors will open slightly, every time you hit a bump! Check this by pulling one door open and look at the distance between the other door and the wheel. What can I do if the wheel is too close to the doors? I must make the wheel retract more, but how can I do this? Adjust the linkage? No, No, Nanette! Dos is verboten! The adjustment made in the down and locked position must remain and not ever moved to get more up motion. So, what do I do? The up lock must be moved enough to make the gear retract more, by making a new retraction plate (aka, up lock). Most sailplanes have replaceable lock plates, 2 or 3 mm more up will normally do the trick.
What can I do if I the gear is retracting enough to be 10mm above the doors, but pulling as hard as I can, the gear won’t quite retract all the way into the up lock?
This is the situation I had. I filed the up lock using a triangle file............just a few strokes, then check for satisfactory retraction. The angle must be more than 90 degrees, about 110 degrees, works best to insure the gear handle remains in the locked position.
Did I miss anything?
JJ
  #2  
Old August 14th 19, 08:14 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 2,124
Default Landing gear adjustment

On Wednesday, August 14, 2019 at 1:02:56 PM UTC-4, wrote:
I just finished replacing a rubber roller in my Genesis-2 nose gear, which I won’t go into because most gliders only retract the main gear. After the nose gear was operating properly, I checked the main gear down lock by shoving forward on the drag links to check it didn’t move more than about 15mm, then snapped back into over-center..........I did this check with the fuselage in the trailer saddle. If the over-center did move more than 15mm, I would have adjusted the drive to give more down (1 turn at a time) until the down lock passed the check.
Next I retracted the gear and checked that the wheel retracted enough to be about 10mm above the closed gear doors. If the wheel is too close to the doors, the doors will open slightly, every time you hit a bump! Check this by pulling one door open and look at the distance between the other door and the wheel. What can I do if the wheel is too close to the doors? I must make the wheel retract more, but how can I do this? Adjust the linkage? No, No, Nanette! Dos is verboten! The adjustment made in the down and locked position must remain and not ever moved to get more up motion. So, what do I do? The up lock must be moved enough to make the gear retract more, by making a new retraction plate (aka, up lock). Most sailplanes have replaceable lock plates, 2 or 3 mm more up will normally do the trick.
What can I do if I the gear is retracting enough to be 10mm above the doors, but pulling as hard as I can, the gear won’t quite retract all the way into the up lock?
This is the situation I had. I filed the up lock using a triangle file............just a few strokes, then check for satisfactory retraction. The angle must be more than 90 degrees, about 110 degrees, works best to insure the gear handle remains in the locked position.
Did I miss anything?
JJ


Sound logical.
Sometimes a slightly different handle can get the position a little further forward and avoid the leverage issue with your arm when you get further back.
Just a thought.
I once had an LS-6 that could either be fully retracted so gear doors would close, or go in over center(toggle) when down, but not both. Prior damage history showed that this was a long term issue with this ship. I had to make a new lock plate to get it to work right.
Sigh
UH
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Video Emerges Of C-5 Galaxy Making A Nose Gear Up Landing At Lackland Air Force Base - C-5M nose up landing.jpg Miloch Aviation Photos 0 August 9th 18 02:59 PM
DG 300 landing gear PK Soaring 9 February 6th 12 07:42 PM
767 landing without landing gear in Warsaw ASM Soaring 10 November 3rd 11 05:53 PM
A Jet Blue Aircraft Landing with Sideway Landing-Gear Lufthansi Piloting 18 July 19th 06 05:13 AM
A Jet Blue Aircraft Landing with Sideway Landing-Gear Hansi Instrument Flight Rules 1 July 17th 06 04:01 AM


All times are GMT +1. The time now is 01:14 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.