|
|
Russell,
With this system, where fluid goes to and fro, your experience would indicate we need a filter at each port of each cylinder. .. like, adding 18 little fiolters into the lines,-- after finding room. Frankly, at first blush this sounds like a good idea to me... and I wondered if there wasn't something missing from the building manual of the project I bought with the plumbing already done (but not tested). I just tested and adjusted the gear retraction for the first time last month ... and am concerned by all the recent lml comments on leaks and other problems with the system. In addition to blowing out the lines with air, should one flush them with -- 'proper thin oils' -- what oils? Since I've already 'powered up' the system, will I now have to pull all the cylinders and replace the O-rings and seals?
I hope others experienced in hydraulics design will offer some comments or suggestions on adding filtration to each cylinder. I don't want to spend a lot of time rebuilding cylinders when I finally get flying. This would be such a big job I'd consider yanking all the hydraulics out and converting to three actuators, with electric clutches for free fall.
Terrence
L235/320 N211AL
----- Original Message ----- From: "Russell" <N2AA@bellsouth.net>
To: <lml@lancaironline.net>
Sent: Monday, November 05, 2007 08:09 AM
Subject: [LML] hydraulic mousetraps for the landing gear
Well guys and gals, I have not dealt with my hydraulic system yet. I hope
to install the landing gear and hydraulic system in December.
On the other hand, I have considerable experience with hydraulic systems as
that was my training in the Navy.
A couple issues that I have not heard is water in the oil and filtration.
When constructing a hydraulic system is in utmost importance to ensure that
all lines and components are clean of debris. One of the best ways to do
this is the flush the system before the cylinders with proper thin oils.
This helps remove debris and moisture. In studying the hydraulic system I
have Not noticed proper filtration. Without proper filtration any particles
left in the system will lead to seal failures.
I plan to install some kind filtration system to ensure that my oil stays
clean. Lastly the hydraulic oils should be changed at least one to two years
depending on the humidity conditions. Surprising hydraulic oils do trap
moisture which also leads to O-ring failure.
Well that's my two cents.
Happy flying
Russell
Asheville North Carolina
Kit number 251
-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net]
Sent: Monday, November 05, 2007 6:01 AM
Subject: lml Digest #2158
Lancair Mailing List Digest #2158
1) Re: Speeds at Altitude
by billhogarty <billhogarty@hughes.net>
2) Re: Oil lines
by billhogarty <billhogarty@hughes.net>
3) Design for Circuit Breakers & Fuses?
by "Valin & Allyson Thorn" <thorn@starflight.aero>
4) Re: Filling and Sanding
by "Bryan Wullner" <sbej@verizon.net>
5) Re: FW: [LML] LNC2 Hyd Chirp Alternative Mousetrap
by "genemartin" <genemartin@enid.com>
6) Re: Speeds at Altitude
by VTAILJEFF@aol.com
7) MR-16 Bulbs revisited
by "Marshall Michaelian" <mmichaelian@comcast.net>
8) Re: Taxi and Landing lights on a 320
by marv@lancair.net
This digest is sent to you because you are subscribed to
the mailing list <lml@lancaironline.net>.
For archives and help click http://lancaironline.net/Lists/lml/
LML website: http://www.lancaironline.net/maillist.html
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.15.19/1105 - Release Date: 11/2/2007
11:04 AM
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.15.19/1105 - Release Date: 11/2/2007
11:04 AM
--
For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html
|
|