REFLECTOR: Nose gear Hydraulic Regulator
Lynn Gallup
LGallup at mn.rr.com
Fri Aug 6 09:35:21 CDT 2004
Re: REFLECTOR: Nose gear Hydraulic Regulator"... and the fast, hard action doesn't seem to do a bit of harm."
I agree, and it is a lovely and reassuring sound when just getting off the ground from a short runway.
Lynn
----- Original Message -----
From: Tom Martino
To: Velocity Aircraft Owners and Builders list
Sent: Thursday, August 05, 2004 12:23 PM
Subject: RE: REFLECTOR: Nose gear Hydraulic Regulator
This may sound a bit crass ... but who cares if the doors shut abruptly. I've observed dozens of gear retraction tests ... and the fast, hard action doesn't seem to do a bit of harm.
-----Original Message-----
From: Al Gietzen [mailto:ALVentures at cox.net]
Sent: Thursday, August 05, 2004 10:56 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: Nose gear Hydraulic Regulator
I had originally introduced the idea of locating the sequence valve to actuate on the web of the strut, thinking that, in addition to simpler plumbing and access, it would solve the slamming by opening the sequence valve more slowly. Although it definitely helped, I found that at certain adjustments, and in certain cases the doors slammed anyway; especially when I adjusted the sequence valve to only open a small amount in an attempt to have it also function as a "throttling" valve. It depended upon whether the main gear was fully up before the doors closed. If so, they would slam because of the high pressure spike at the end of the travel.
The solution was to extend the adjusting screw in the sequence valve so it would open further, and stay open through the nose gear "bounce" at the end of its travel, allowing the doors to fully close after the nose gear retracted and the main gear were still in travel. The nose gear normally retracts first, but not always. Even if the mains go up first, the nose gear will come off over-center when the mains hit the top; and the mains will drop back a bit as the nose gear comes up, so the solution still applies.
I don't know if this applies in your case, because depending on your sequence vale location, you probably can't get the doors to close all the way before the mains are fully retracted; but you might try changing the sequence valve adjustment. Of course if valve stem is hitting bottom, extending the screw further may damage the valve.
Al
on 8/4/04 9:00 PM, PVTPIL8 at aol.com at PVTPIL8 at aol.com wrote:
I am wondering if anybody has a part number and a location for an inline regulator for the nose gear hydraulic cylinder. My nose gear doors slam close and Scott Swing said some people are using an in line regulator to slow them down. Any help would be appreciated.
Thanks Steve
N787SB
XL-RG
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