X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 18 Mar 2014 15:13:07 -0400 Message-ID: X-Original-Return-Path: Received: from nm33-vm1.bullet.mail.bf1.yahoo.com ([72.30.239.201] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6785472 for lml@lancaironline.net; Tue, 18 Mar 2014 13:07:24 -0400 Received-SPF: none receiver=logan.com; client-ip=72.30.239.201; envelope-from=chris_zavatson@yahoo.com Received: from [66.196.81.174] by nm33.bullet.mail.bf1.yahoo.com with NNFMP; 18 Mar 2014 17:06:48 -0000 Received: from [98.139.212.246] by tm20.bullet.mail.bf1.yahoo.com with NNFMP; 18 Mar 2014 17:06:48 -0000 Received: from [127.0.0.1] by omp1055.mail.bf1.yahoo.com with NNFMP; 18 Mar 2014 17:06:48 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 313208.23186.bm@omp1055.mail.bf1.yahoo.com Received: (qmail 39076 invoked by uid 60001); 18 Mar 2014 17:06:48 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=2kkixare9CVkQc7jcpa9z6odYmi6zLu07hG+8Ublx5EJIyVMWe5whbeW7W0+N2MBr9ohcluIBWWyEiMHwZ0MCrNT/8EzPxhazowAGtTkdrS0MpbeYL5jBf4VmvKr0DvvZdq5yteLFNdcarErWBUA1ZqpugHACOE32xFWX9G8nv0=; X-YMail-OSG: Tqks8GIVM1lqmA.7I4md50e.smymrvHxMmaWo4VehZtC8tw qvbygCc0Ba1ScwBQ9fc7WGZ7nIrqBF8S6rQ8LIF87GJBOW5H6_Nr7xU5vnUP 1Mpigp4bcO1AmPCTfC4b04e_.gmW2kNvhEMoCe8iZ7crTGlKFkPT1lKOrHEG iHHbqQEjIDNtGBgw6A7xFltJKSK7dFfCuRFn86X6FPo2ko3CAFumkRhldmhT _MrEIKnhuldmPd2AZ7Uz9Xiy_ImCTrchjURUy59RdC_iChLPeDYxpT1Lnn2X 7tXLZEUW_QvhmeFY.9Qxjl7NxLU94fGnotHJzKvtU25r9L1Q2qr5RG4TxzCz PGNdqc8BS57aR67gG9i7sqyuXm4NUbUZV2Z5LIqzoY2B8k1DLB9xYjfNKFPI z8VgkFdmq7H9wFZNPABq4P.0gjy1z0DNBKyR2Hw0Ue7DzuUIc60VZ4vKXFIS wPXtWu2_3u1QWkdByEKNSWRfYtNYXeqvLmD0QC.jLowqgOu4mq7V8azBMPg4 ttf9RHe0zYTfGkOPOVblp2PUs3twPyzlAijIiSkoksUI9L6.m2n04r9peuUM 9Dh4OaAmctfyjlSQf.AasmyAtiArDtlH0Blh5bLDTc2.g7036Dy8JCOZN0z. JyCVVl25cvYsJAJjm9l5gtsnE4mI3ZV9PQYBW3eUDm9UBl31YmCUyUL7y5rw do8RAwWklmInAwYy__FLJCJse89YyBCNceGqjnp5kV5gRfsTclPn73DAelkO bExA8nmhEJsS3jgMaULAtAwn8hHa4m_6IFnKwpih4espX3VBSuZfUQ3RTKh7 ODosUxIrG4ClzpkLj_kW9tB5YrhCrooypuglrKwwKrWXpBF7Ay6hKKbJIokl u6iCRKuJszMn_pzQmJN0lrLUhqRPy.SGvMwyVavh5j97cknqS9n5ZB0kw7m8 xqrTxJjiSyP5GzMf9LZU0F7M.WFZy5w-- Received: from [172.14.16.72] by web161206.mail.bf1.yahoo.com via HTTP; Tue, 18 Mar 2014 10:06:47 PDT X-Rocket-MIMEInfo: 002.001,RG9tLApNeSAzNjAgcmVxdWlyZXMgYSBzdHJ1dCBmb3JjZSBzb21ld2hlcmUgc291dGggb2YgNjUgbGJzIHRvIGxvY2sgdGhlIGdlYXIgaW4gZmxpZ2h0LsKgIFRoZSBzdHJ1dCB3aGVuIG5ldyBhdCB.MTAwIGxicyBoYXMgYSBodWdlIG1hcmdpbi7CoCBJIGJhc2UgbXkgcmVwbGFjZW1lbnQgaW50ZXJ2YWwgb24gYWN0dWFsIHN0cnV0IHBlcmZvcm1hbmNlIGluLWZsaWdodC7CoCBJwqBsb29rIGZvcsKgdGhlIG1heGltdW0gYWlyc3BlZWQgYXQgd2hpY2ggdGhlIGdlYXIgd2lsbCBsb2NrLsKgIEkgc3RhcnQgYXQBMAEBAQE- X-Mailer: YahooMailWebService/0.8.178.641 References: X-Original-Message-ID: <1395162407.75582.YahooMailNeo@web161206.mail.bf1.yahoo.com> X-Original-Date: Tue, 18 Mar 2014 10:06:47 -0700 (PDT) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: NG Gas strut X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="1938299484-1968296653-1395162407=:75582" --1938299484-1968296653-1395162407=:75582 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Dom,=0AMy 360 requires a strut force somewhere south of 65 lbs to lock the = gear in flight.=A0 The strut when new at ~100 lbs has a huge margin.=A0 I b= ase my replacement interval on actual strut performance in-flight.=A0 I=A0l= ook for=A0the maximum airspeed at which the gear will lock.=A0 I start at 1= 20 KIAS and free-fall the gear.=A0 New gas struts will lock the nose gear e= ven at this much elevated speed.=A0 If it does not lock, I start slowing=A0= until I get a green light.=A0 During this test the gear has already lost it= s momentum from the free fall and it is just the=A0 gasstrut pushing the ge= ar forward into the airstream.=A0 Once the maximum locking speed (without t= he aide of a free fall) drops below 100 KIAS I replace the strut.=A0=A0They= have been lasting=A0about seven years.=A0=A0 Note that undue friction in t= he bearings or linkages can reduce your margins=A0during the free fall.=A0 = So even if the strut is replaced more frequently, an inflight test is the o= nly way to know the actual functional performance of the system.=0AIn-flight testing of the em= ergency extension is a critical maintenance item.=A0 Throughout the years t= he Lancair fleet has suffered=A0a number of=A0nose gear collapses=A0 (follo= wing emergency extensions)=A0as a result of weak gas struts that were not b= eing properly checked.=0ANote that undue friction in the bearings or linkag= es can reduce your margins=A0during the free fall.=A0 In an=A0actual emerge= ncy extension one should=A0slow down at 80 to reduce the air loads.=0AFor m= ore nose gear maintenance items:=0Ahttp://www.lancairowners.com/nosegearmai= ntenance/=0A=0AChris Zavatson=0AN91CZ=0A360std=A0=A0=A0=0A=0A=0A=0A=0AOn Tu= esday, March 18, 2014 8:57 AM, George Rosel wrote:= =0A =0AHello Gang,=0A=0AI 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.=0A=0AFly Safe!!=0A=0A... George=0A=0A=0A=0AGeorge F. Rosel=0A=0A=0A(= cell) 303-995-5501=0A=0A=0ACool vacation destination...=0A=0A"The Lodge at = Timberline", Copper Mtn., Colorado ... a true "ski-in/ski-out" Luxury Home = for RENT, see video... http://youtu.be/ZYMcJn2TfqY=0A=A0... Click here to v= iew my webpage:http://www.vrbo.com/254739=A0=A0 or...=A0 http://www.lodgeat= timberline.com/=0A=0A=0A=0A=0A=0AOn Tuesday, March 18, 2014 9:19 AM, Matt <= mattinlosangeles@yahoo.com> wrote:=0A =0AI test it in flight on my 360. A = couple times a year. When the airspeed gets too slow I replace it. =0A=0AMa= tt=0A=0ASent from my iPhone=0A=0A> On Mar 18, 2014, at 6:53 AM, John Barret= t <2thman1@gmail.com> wrote:=0A> =0A> You can remove the strut and test it.= I do that at annual and replace it if it's losing its charge=0A> =0A> John= =0A> =0A> Sent from my iPad=0A> =0A> =0A>> On Mar 18, 2014, at 4:48 AM, "Do= minic V. Crain" wrote:=0A>> =0A>> Does anyone change = the nose gear gas strut as a matter of routine maintenance, e.g., at an ann= ual, or biennially etc?=0A>> Cheers=0A>> =0A>> Dom Crain=0A>> VH-CZJ=0A>> = =0A>> Dominic V. Crain=0A>> domcrain@tpg.com.au=0A>> Phone 03-94161881=0A>>= Mobile 0412-359320=0A>> =0A>> =0A>> --=0A>> For archives and unsub http://= mail.lancaironline.net:81/lists/lml/List.html=0A> =0A> --=0A> For archives = and unsub http://mail.lancaironline.net:81/lists/lml/List.html=0A=0A--=0AFo= r archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --1938299484-1968296653-1395162407=:75582 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Dom,
My 360 requires a strut force somewhere south of 65 lbs t= o 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 i= t does not lock, I start slowing until I get a green light.  Duri= ng 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.&= nbsp; Once the maximum locking speed (without the aide of a free fall) drop= s 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 f= all.  So even if the strut is replaced more frequently, an inflight te= st is the only way to know the actual functional performance of the system.=
In-flight testing of the emergency ext= ension is a critical maintenance item.  Throughout the years the Lanca= ir fleet has suffered a number of nose gear collapses  (foll= owing emergency extensions) as a result of weak gas struts that were n= ot being properly checked.
Note that undue fr= iction in the bearings or linkages can reduce your margins during the = free fall.  In an actual emergency extension one shou= ld slow down at 80 to reduce the air loads.
=
For more nose gear maintenance items:

Chris Zavatson
N91CZ
<= span>360std   



On Tuesday, March 18, 2014 8:57 AM, George Rosel <ro= sel_george@yahoo.com> wrote:
Hello Gang,
I suggest you change out the nose gas strut every year at your annual cond= ition 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=0A destination...
"The Lodge= at Timberline", Copper Mtn., Colorado ... a true "ski-in/ski-out" L= uxury Home for RENT, see video...= http://youtu.be/ZYMcJn2TfqY
 ... C= lick here to view my webpage: <= /span>= http://www.vrbo.com/254739   or...  http://w= ww.lodgeattimberline.com/



=0A
On Tuesday, March 18, 2014 9:= 19 AM, Matt <mattinlosangeles@yahoo.com> wrote:
<= div class=3D"yiv0460680726y_msg_container">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, J= ohn Barrett <2thman1@gmail.com>= ; wrote:
>
> You can remove the strut and test it. I do that a= t annual and replace it if it's losing its charge
>
> John
= >
> Sent from my iPad
>
>
>> On Mar 18, 20= 14, at 4:48 AM, "Dominic V. Crain" <domcrain@tpg.com.au>=0A wrot= e:
>>
>> Does anyone change the nose gear gas strut as a= matter of routine maintenance, e.g., at an annual, or biennially etc?
&= gt;> Cheers
>>
>> Dom Crain
>> VH-CZJ
>= ;>
>> Dominic V. Crain
>> domcrain@tpg.com.au
>> Phone 03-94161881
>>= ; Mobile 0412-359320
>>
>>
>> --
>> F= or archives and unsub http://mail.lancaironline.n= et: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=



=
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