X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 19 Mar 2014 10:34:10 -0400 Message-ID: X-Original-Return-Path: Received: from qmta14.westchester.pa.mail.comcast.net ([76.96.59.212] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 6786910 for lml@lancaironline.net; Wed, 19 Mar 2014 10:20:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.59.212; envelope-from=cloomis@comcast.net Received: from omta03.westchester.pa.mail.comcast.net ([76.96.62.27]) by qmta14.westchester.pa.mail.comcast.net with comcast id fQ2N1n0070bG4ec5ESKpNy; Wed, 19 Mar 2014 14:19:49 +0000 Received: from ArborPC ([98.250.54.222]) by omta03.westchester.pa.mail.comcast.net with comcast id fSHo1n00f4nfvpu3PSHoVZ; Wed, 19 Mar 2014 14:17:49 +0000 From: "Carl loomis" X-Original-To: "'George Rosel'" , References: In-Reply-To: Subject: RE: [LML] Re: NG Gas strut X-Original-Date: Wed, 19 Mar 2014 10:17:46 -0400 X-Original-Message-ID: <024401cf437e$005933e0$010b9ba0$@comcast.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0245_01CF435C.79498FB0" X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQGZImMZVw6u/vP3keAz90I/8cjvcJtUp+iA Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0245_01CF435C.79498FB0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I would recommend that anyone replacing their gas strut test the new one prior to installation. I wish I had- it would have saved me a lot of unnecessary work. We replaced the gas strut for the nose gear on our IV with the replacement that was sent from Lancair, since ours had been for several years. After the replacement, the nose gear would not retract at times, I would have to slow down to 110-120 kts and cycle it 2 or 3 times to get it to come up. We put the plane on jacks, checked hydraulic pressure, looked for binding- all looked fine. Gear seemed to be working a bit hard while retracting on jacks, but went up every time with no delay. Flew it some more, still same problem- nose gear would not retract reliably. Put the old one back in, works fine. Yes- I do test the emergency down regularly. Carl Loomis From: George Rosel [mailto:rosel_george@yahoo.com] Sent: Tuesday, March 18, 2014 3:59 PM To: lml@lancaironline.net Subject: Re: [LML] Re: NG Gas strut Bill, I fly a 4-P Turbine and the description from Michelle at Kit Components is... 160-0002, gas spring 100#, 10.71" ext'd / 3.94" stroke, M6 male Note that there are two different "end" styles and confirm with her which one that you have before ordering. She is very helpful!! ... George George F. Rosel (cell) 303-995-5501 Cool vacation destination... "The Lodge at Timberline", Copper Mtn., Colorado ... a true "ski-in/ski-out" Luxury Home for RENT, see video... http://youtu.be/ZYMcJn2TfqY ... Click here to view my webpage: http://www.vrbo.com/254739 or... http://www.LodgeAtTimberline.com On Tuesday, March 18, 2014 1:14 PM, Chris Zavatson wrote: Dom, My 360 requires a strut force somewhere south of 65 lbs to lock the gear in flight. The strut when new at ~100 lbs has a huge margin. I base my replacement interval on actual strut performance in-flight. I look for the maximum airspeed at which the gear will lock. I start at 120 KIAS and free-fall the gear. New gas struts will lock the nose gear even at this much elevated speed. If it does not lock, I start slowing until I get a green light. During this test the gear has already lost its momentum from the free fall and it is just the gasstrut pushing the gear forward into the airstream. Once the maximum locking speed (without the aide of a free fall) drops below 100 KIAS I replace the strut. They have been lasting about seven years. Note that undue friction in the bearings or linkages can reduce your margins during the free fall. So even if the strut is replaced more frequently, an inflight test is the only way to know the actual functional performance of the system. In-flight testing of the emergency extension is a critical maintenance item. Throughout the years the Lancair fleet has suffered a number of nose gear collapses (following emergency extensions) as a result of weak gas struts that were not being properly checked. Note that undue friction in the bearings or linkages can reduce your margins during the free fall. In an actual emergency extension one should slow down at 80 to reduce the air loads. For more nose gear maintenance items: http://www.lancairowners.com/nosegearmaintenance/ Chris Zavatson N91CZ 360std On Tuesday, March 18, 2014 8:57 AM, George Rosel wrote: Hello Gang, I suggest you change out the nose gas strut every year at your annual condition inspection. It's not worth the worry and they only cost 19.75ea. from Lancair Kit Components. I just ordered a couple of them. Fly Safe!! ... George George F. Rosel (cell) 303-995-5501 Cool vacation destination... "The Lodge at Timberline", Copper Mtn., Colorado ... a true "ski-in/ski-out" Luxury Home for RENT, see video... http://youtu.be/ZYMcJn2TfqY ... Click here to view my webpage: http://www.vrbo.com/254739 or... http://www.lodgeattimberline.com/ On Tuesday, March 18, 2014 9:19 AM, Matt wrote: I test it in flight on my 360. A couple times a year. When the airspeed gets too slow I replace it. Matt Sent from my iPhone > On Mar 18, 2014, at 6:53 AM, John Barrett <2thman1@gmail.com> wrote: > > You can remove the strut and test it. I do that at annual and replace it if it's losing its charge > > John > > Sent from my iPad > > >> On Mar 18, 2014, at 4:48 AM, "Dominic V. Crain" wrote: >> >> Does anyone change the nose gear gas strut as a matter of routine maintenance, e.g., at an annual, or biennially etc? >> Cheers >> >> Dom Crain >> VH-CZJ >> >> Dominic V. Crain >> domcrain@tpg.com.au >> Phone 03-94161881 >> Mobile 0412-359320 >> >> >> -- >> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html > > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html ------=_NextPart_000_0245_01CF435C.79498FB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I would recommend that anyone replacing their gas strut  test = the new one prior to installation. I wish I had- it would have saved me = a lot of unnecessary work.

 

We replaced the gas strut for the nose gear on our IV with the = replacement that was sent from Lancair, since ours had been for several = years. After the replacement, the nose gear would not retract at times, = I would have to slow down to 110-120 kts and cycle it 2 or 3 times to = get it to come up.

 

We put the plane on jacks, checked hydraulic pressure, looked for = binding- all looked fine. Gear seemed to be working a bit hard while = retracting on jacks, but went up every time with no delay. Flew it some = more, still same problem- nose gear would not retract = reliably.

 

Put the old one back in, works fine.

 

Yes- I do test the emergency down regularly.

 

Carl Loomis

 

From:= = George Rosel [mailto:rosel_george@yahoo.com]
Sent: Tuesday, = March 18, 2014 3:59 PM
To: = lml@lancaironline.net
Subject: Re: [LML] Re: NG Gas = strut

 

Bill,

I fly a 4-P Turbine and the description from Michelle at = Kit Components is...

160-0002, gas spring 100#, 10.71" ext'd = / 3.94" stroke, M6 male

Note that there are two different = "end" styles and confirm with her which one that you have = before ordering. She is very helpful!!

... = George

 

 

George F. Rosel

(= cell) 303-995-5501

C= ool vacation destination...

"The Lodge at Timberline", Copper Mtn., = Colorado ... a true "ski-in/ski-out" Luxury Home for = RENT, see video... http://youtu.be/ZYMcJn2TfqY
 ... Click = here to view my webpage: http://www.vrbo.com/254739   or...  = http://www.LodgeAtTimberline.com<= /p>

 

O= n Tuesday, March 18, 2014 1:14 PM, Chris Zavatson <chris_zavatson@yahoo.com>= wrote:

Dom,

My 360 requires a strut force = somewhere south of 65 lbs to lock the gear in flight.  The strut = when new at ~100 lbs has a huge margin.  I base my replacement = interval on actual strut performance in-flight.  I look = for the maximum airspeed at which the gear will lock.  I start = at 120 KIAS and free-fall the gear.  New gas struts will lock the = nose gear even at this much elevated speed.  If it does not lock, I = start slowing until I get a green light.  During this test the = gear has already lost its momentum from the free fall and it is just = the  gasstrut pushing the gear forward into the airstream.  = Once the maximum locking speed (without the aide of a free fall) drops = below 100 KIAS I replace the strut.  They have been = lasting about seven years.   Note that undue friction in = the bearings or linkages can reduce your margins during the free = fall.  So even if the strut is replaced more frequently, an = inflight test is the only way to know the actual functional performance = of the system.

In-flight testing of the = emergency extension is a critical maintenance item.  Throughout the = years the Lancair fleet has suffered a number of nose gear = collapses  (following emergency extensions) as a result of = weak gas struts that were not being properly = checked.

Note that undue friction in the = bearings or linkages can reduce your margins during the free = fall.  In an actual emergency extension one should slow = down at 80 to reduce the air loads.

For more nose gear maintenance = items:

 

=

Chris = Zavatson

N91CZ

<= div>

360std   

 

=

 

<= div>

O= n Tuesday, March 18, 2014 8:57 AM, George Rosel <rosel_george@yahoo.com> = wrote:

Hello Gang,

I suggest you change out the nose gas strut every = year at your annual condition inspection. It's not worth the worry and = they only cost 19.75ea. from Lancair Kit Components. I just ordered a = couple of them.

Fly Safe!!

... = George

 

 

George F. Rosel

(= cell) 303-995-5501

C= ool vacation destination...

"The Lodge at Timberline", Copper Mtn., = Colorado ... a true "ski-in/ski-out" Luxury Home for = RENT, see video... http://youtu.be/ZYMcJn2TfqY
 ... Click = here to view my webpage: http://www.vrbo.com/254739   or...  = http://www.lodgeattimberline.com/=

 

O= n Tuesday, March 18, 2014 9:19 AM, Matt <mattinlosangeles@yahoo.com= > wrote:

I test it in = flight on my 360. A couple times a year. When the airspeed gets too slow = I replace it.

Matt

Sent from my iPhone

> On Mar = 18, 2014, at 6:53 AM, John Barrett <2thman1@gmail.com> wrote:
>
> You = can remove the strut and test it. I do that at annual and replace it if = it's losing its charge
>
> John
>
> Sent from = my iPad
>
>
>> On Mar 18, 2014, at 4:48 AM, = "Dominic V. Crain" <domcrain@tpg.com.au> wrote:
>> =
>> Does anyone change the nose gear gas strut as a matter of = routine maintenance, e.g., at an annual, or biennially etc?
>> = Cheers
>>
>> Dom Crain
>> VH-CZJ
>> =
>> Dominic V. Crain
>> domcrain@tpg.com.au
>> Phone = 03-94161881
>> Mobile 0412-359320
>>
>> =
>> --
>> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html
>
> --
> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html

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