X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 10 Sep 2008 21:24:02 -0400 Message-ID: X-Original-Return-Path: <5zq@cox.net> Received: from eastrmmtao102.cox.net ([68.230.240.8] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3122034 for lml@lancaironline.net; Tue, 09 Sep 2008 22:03:37 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.8; envelope-from=5zq@cox.net Received: from eastrmimpo02.cox.net ([68.1.16.120]) by eastrmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080910020255.RQZW22786.eastrmmtao102.cox.net@eastrmimpo02.cox.net> for ; Tue, 9 Sep 2008 22:02:55 -0400 Received: from user63078dbb33 ([72.209.206.81]) by eastrmimpo02.cox.net with bizsmtp id Cq2t1a00J1luCMU02q2tKo; Tue, 09 Sep 2008 22:02:54 -0400 X-Original-Message-ID: From: "Bill Harrelson" <5zq@cox.net> X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Birdstrikes and other structural damage. X-Original-Date: Tue, 9 Sep 2008 22:03:30 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0032_01C912C7.E4B63CB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0032_01C912C7.E4B63CB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Excellent advice Mark. Thats what we did with our bird strike. We = maintained 140 kts, climbed to pattern altitude and slowed very, very = gradually. We also extended flaps in extremely small increments. Flaps = helped our situation a lot. After the fact analysis makes that seem = obvious but at the time, a little at a time seemed like a good idea.=20 Bill Harrelson N5ZQ 320 1,550 hrs N6ZQ IV under construction ----- Original Message -----=20 From: Mark Ravinski=20 To: lml@lancaironline.net=20 Sent: Tuesday, September 09, 2008 7:41 PM Subject: [LML] Birdstrikes and other structural damage. Guys and Girls, Let me share a little Air Force doctrine for you to ponder. First, Whenever you experience structural damage in flight, whether = from a bird, midair, someone shooting at you or anything else, the = safest speed is the one you are at - assuming that you are still = controllable. Probably somewhat slower if you are not. This is because = the stall speed is expected to increase with any damage. Second, Climb at a safe airspeed to a safe altitude for a = controllability check and possibly bailout. =20 I realize that we seldom fly with a chute and this part is of limited = use. The controllability check is a gradual slowing down to see if the = plane is still controllable at a speed at which it can be landed safely. = Use flaps only if they appear undamaged. Tricycle gear airplanes have a maximum landing speed where the = nosewheel touches down first initiating a porpoise and probable gear = collapse. My 360 would probably be porposing badly at speeds about 50 = kts above normal landing speed. This is a hard number to get exact data = on. You can gradually increase landing speeds until you touch down = exactly 3 point and then figure somewhat more as a practical limit. I would do the controllability check as a means to determine how messy = the landing could be. Then go somewhere with plenty of emergency = equipment if needed and maybe even land gear up. Lastly, After the controllability check, maneuver to your landing = while holding a speed at or above the minimum you flew on the check. =20 There are other checklist items also as appropriate from your manual. Mark Ravinski 360 1445 hrs ------=_NextPart_000_0032_01C912C7.E4B63CB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Excellent advice Mark. Thats what = we did with=20 our bird strike. We maintained 140 kts, climbed to pattern=20 altitude and slowed very, very gradually. We also extended = flaps in=20 extremely small increments. Flaps helped our situation a lot. After = the=20 fact analysis makes that seem obvious but at the time, a little at a = time seemed=20 like a good idea.
 
Bill Harrelson
N5ZQ 320 1,550 hrs
N6ZQ  IV under = construction
 
 
----- Original Message -----
From:=20 Mark = Ravinski=20
Sent: Tuesday, September 09, = 2008 7:41=20 PM
Subject: [LML] Birdstrikes and = other=20 structural damage.

Guys and Girls,
Let me share a little Air Force = doctrine for you=20 to ponder.
 
First,   Whenever you = experience=20 structural damage in flight, whether from a bird, midair, someone = shooting at=20 you or anything else, the safest speed is the one you are at - = assuming=20 that you are still controllable.  Probably somewhat slower = if you=20 are not.  This is because the stall speed is expected to increase = with=20 any damage.
 
Second,   Climb at a safe = airspeed to a=20 safe altitude for a controllability check and possibly bailout. =20
I realize that we seldom fly with a = chute and=20 this part is of limited use.
The controllability check is  a = gradual=20 slowing down to see if the plane is still controllable at a speed at = which it=20 can be landed safely.  Use flaps only if they appear=20 undamaged.
 
Tricycle gear airplanes have a = maximum landing=20 speed where the nosewheel touches down first initiating a porpoise and = probable gear collapse.  My 360 would probably be porposing badly = at=20 speeds about 50 kts above normal landing speed.  This is a hard = number to=20 get exact data on.  You can gradually increase landing speeds = until you=20 touch down exactly 3 point and then figure somewhat more as a = practical=20 limit.
 
I would do the controllability check = as a means=20 to determine how messy the landing could be.  Then go somewhere = with=20 plenty of emergency equipment if needed and maybe even land gear=20 up.
 
Lastly,  After the = controllability check,=20 maneuver to your landing while holding a speed at or above the minimum = you=20 flew on the check. 
There are other checklist items also = as=20 appropriate from your manual.
 
Mark Ravinski
360    1445=20 hrs
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