JeffH

My Feedback: (43)

Can the UP sequencing retract valves be used with a spring air main and air-up/air-down nose?

Chris True

My Feedback: (14)

I can't answer about that specific valve but I can say what I have working in my A-10. Air up / down mains and Spring Air air up / spring down nose gear.

The up line is t'd to run all three gears. The air downline ONLY runs to the mains. If your UP valve has seperate ports for main and nose gears then the air down port for the Spring Airs would just need to be capped off.

JeffH

My Feedback: (43)

I ask this because I have nose and main gear doors to open and close to allow the gear to retract...ala F-86

jetflyer

My Feedback: (5)

You might have a problem with your doors if they are both air up/down. If you get a leak and the spring airs pop down, it might damage your doors.

JR Gautreaux

JeffH

My Feedback: (43)

I am not too worried about that, if they get damaged, oh well.

JSF-TC

My Feedback: (2)

I'm running Robart mains, and a SpringAir nose retract on my Rafale, and I use the same UP Air Up, Air Down valve for both. I just don't run the down line to the SpringAir. It works fine, but I had to put an in-line restrictor in the up line to the SpringAir as with the needle valves set for a smooth Robart retract and extend speed, the SpringAir was to abrupt.

I use another UP Air Up, Air Down to control the doors.

Paul

Chris True

My Feedback: (14)

I think that is because the needles only regulate the exhaust air - I did the same thing on mine. With an air up / down retract you will get full pressure on the up line and the down line side slowly exhausts through the needle. For extension full pressure on the down line and slow let out on the up line.

At least that is how I understand it