X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Nov 2011 08:12:41 -0500 Message-ID: X-Original-Return-Path: Received: from nm26.bullet.mail.sp2.yahoo.com ([98.139.91.96] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with SMTP id 5200230 for lml@lancaironline.net; Tue, 15 Nov 2011 01:42:37 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.91.96; envelope-from=wfhannahan@yahoo.com Received: from [98.139.91.65] by nm26.bullet.mail.sp2.yahoo.com with NNFMP; 15 Nov 2011 06:42:02 -0000 Received: from [98.139.91.31] by tm5.bullet.mail.sp2.yahoo.com with NNFMP; 15 Nov 2011 06:42:02 -0000 Received: from [127.0.0.1] by omp1031.mail.sp2.yahoo.com with NNFMP; 15 Nov 2011 06:42:02 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 163620.15966.bm@omp1031.mail.sp2.yahoo.com Received: (qmail 95782 invoked by uid 60001); 15 Nov 2011 06:42:01 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=PDKg6EyFrj5hf4ytySTPnjiA3/y8MnD/40yYJ5vqG02oFyJEXz91em4wZlkQIfZ4upWaWmRrTQLPT7rRsbvXTyuK3bZWnwUQs52byT/Xm6UaSajoJ8G+lmk4vd3x10BO4JfcANny5SA9zHPOZK9KpcqOVjC/mP+MsM6uArsBFiI=; X-YMail-OSG: WRrIOoQVM1nptM2ibC26KbP5Lhc21QPNRpedijE.MOefWV9 1o_4Y13VNSz.TZb2moHrwJbA7o4RE2bjy8yrWY9gN0Qs0b5eYAhHMcSM6aOK mPYl_g1CPVGeX9Ux.__yyiq82xTfBdDFDlwiYRZwc.s4Kq_JX4ELeQ5GCX.P bdBZLBfBAu6EnyVk1De5LrdUIwdxvUcZ.LpEbh5MnMKyRfkPyuCls4pEhl43 778VhKAlqGWOZzj4ne1ki780asBshM0R.7XC4iKofWsVnezCiSH4EiekefGy MOeH8vtyE.NgUPN0SdhVl.uFkn3WIYJaT3yR2HdbYgWNygR0_ClFwa2AN0Fd xpwjGrGrtcWMlg9i37bK5ee.LxqXBmD3b3loJDQGW8uJDtBXPegRzHmMDiAg i5kujaVe9pBaXs1jwkoG4n9BX2UjIqdSYcY5KWcixSpAaSGYId8LRCE.JpbW pF9tIEunB Received: from [174.29.183.161] by web33907.mail.mud.yahoo.com via HTTP; Mon, 14 Nov 2011 22:42:01 PST X-Mailer: YahooMailWebService/0.8.115.325013 References: X-Original-Message-ID: <1321339321.84317.YahooMailNeo@web33907.mail.mud.yahoo.com> X-Original-Date: Mon, 14 Nov 2011 22:42:01 -0800 (PST) From: Bill Hannahan Reply-To: Bill Hannahan Subject: Re: [LML] Re: life time brake pads IVP X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-108509754-1012706184-1321339321=:84317" ---108509754-1012706184-1321339321=:84317 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Good points Bob.=0A=0ADrilling the rotors reduces their mass and their ener= gy capacity. They are=C2=A0 one stop energy absorbers, not race car brakes.= =0A=0A=C2=A0=0ARegards,=0ABill Hannahan=0A=0Awfhannahan@yahoo.com=0A=0A=0A_= _______________________________=0AFrom: Robert R Pastusek =0ATo: lml@lancaironline.net=0ASent: Monday, November 14, 2011 5:44 AM= =0ASubject: [LML] Re: life time brake pads IVP=0A=0A=0ARalf wrote,=0A=C2=A0= =0A=C2=A0I have been using organic brake pads because these were the only o= nes=0A=C2=A0that I was able to find to fit my Cleveland brakes. I understan= d that=0A=C2=A0these are less durable than the one with metal/asbestos.=0A= =C2=A0=0A=C2=A0My disks are slightly modified. I drilled them for better he= at=0A=C2=A0dissipation and had them plasma nitride for corrosion protection= (don't=0A=C2=A0worry I replaced the aluminum line with a flex line - it wo= rked very=0A=C2=A0well for me=C2=A0=C2=A0but for the peace of mind of the p= eople around me that care=0A=C2=A0about me I changed it)=0A=C2=A0=0A=C2=A0I= got a question now regarding the life time of your break pads - mine=0A=C2= =A0are pretty much gone after about 20 - 30 landings. I am using runways=0A= =C2=A0mostly between 3000 and 4000 feet. I usually use the breaks pretty ha= rd.=0A=C2=A0And of course the right on is always gone first (not by much).= =0A=C2=A0=0A=C2=A0Any comment about the life time or may be on different pa= ds will be=0A=C2=A0appreciated.=0A=C2=A0=0A=C2=A0=0A=0A=C2=A0Ralf, =0AI ins= talled the (optional from Lancair) Cleveland =E2=80=9Cheavy duty=E2=80=9D b= rakes when I built my IV-P, and at 750 flight hours and approximately 850 l= andings, am on my third set of brake pads (the metallic ones). This third s= et went on at 720 flight hours this summer when I did the condition inspect= ion and don=E2=80=99t have any measurable wear yet. I can strongly recommen= d these brakes; they should be good for 350-400 landings unless you=E2=80= =99re operating out of very short fields.=C2=A0 You were wise to change the= hard line between the brake caliper and the gear leg. There is some moveme= nt between these parts, and LOTS of vibration during braking. Hard line, es= pecially without a flex loop, will fail rather quickly.=C2=A0 I doubt you= =E2=80=99re helping yourself on pad wear by drilling the disks. This effect= ively reduces the contact surface area, requiring more pressure to achieve = the same braking effect. Also, the holes tend to =E2=80=9Cwipe off=E2=80=9D= just a bit more of brake material under the higher braking pressure. =0A=C2=A0=0AMy two cents=E2=80=A6=0A=0ABob Pa= stusek ---108509754-1012706184-1321339321=:84317 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Good point= s Bob.

Drilling the roto= rs reduces their mass and their energy capacity. They are  one stop en= ergy absorbers, not race car brakes.
 
Rega= rds,
Bill Hannahan

wfhannahan@yahoo.com

From: Robert R Past= usek <rpastusek@htii.com>
To= : lml@lancaironline.net
Sent: Monday, November 14, 2011 5:44 AM
Subject: [LML] Re: life time brake pads IVP

=0A
Ralf wrote,
 
 I have been using organic brake pads beca= use these were the only ones
 that I was able to find to fit my Cle= veland brakes. I understand that
 these are less durable than the o= ne with metal/asbestos.
 
 My disks are slightly modified. = I drilled them for better heat
 dissipation and had them plasma nit= ride for corrosion protection (don't
 worry I replaced the aluminum= line with a flex line - it worked very
 well for me  but= for the peace of mind of the people around me that care
 about me = I changed it)
 
 I got a question now regarding the life time of you= r break pads - mine
 are pretty much gone after about 20 - 30 landi= ngs. I am using runways
 mostly between 3000 and 4000 feet. I usual= ly use the breaks pretty hard.
 And of course the right on is alway= s gone first (not by much).
 
 Any comment about the life t= ime or may be on different pads will be
 appreciated.
 
 

 Ralf, =
I installed the (optional from Lancair) Cleveland =E2=80=9Cheavy duty= =E2=80=9D brakes when I built my IV-P, and at 750 flight hours and approxim= ately 850 landings, am on my third set of brake pads (the metallic ones). This third set went = on at 720 flight hours this summer when I did the condition inspection and = don=E2=80=99t have any measurable wear yet. I can strongly recommend these = brakes; they should be good for 350-400 landings unless you=E2=80=99re oper= ating out of very short fields.  You were wise= to change the hard line between the brake caliper and the gear leg. There = is some movement between these parts, and LOTS of vibration during braking.= Hard line, especially without a flex loop, will fail rather quickly.  I doubt you=E2=80=99re helping yourself on pad wea= r by drilling the disks. This effectively reduces the contact surface area,= requiring more pressure to achieve the same braking effect. Also, the hole= s tend to =E2=80=9Cwipe off=E2=80=9D just a bit more of brake material unde= r the higher braking pressure.
 
My two cents=E2=80=A6

Bob Pastusek
 


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