Main Landing Gear Retraction Test

I finally received the main landing gear hydraulic cylinder from the factory, over a year late.  It was installed in the keel tunnel and the retraction cables were attached to the MLG over-center mechanism.  Instead of hooking up the hydraulic pump, I decided to use nitrogen to test the retraction.  There is a stored energy problem with using gas, so I was very careful to manually help the retraction through the portions that required the most pressure.  I found that the over-center lock bar disengaged at about 380 psi, but it only required about 100 psi to hold the MLG in the retracted (up) position.

Author: bzvelocity

Building a Velocity XLRG-5

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: