X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 04 Oct 2012 08:43:28 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ee0-f52.google.com ([74.125.83.52] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTPS id 5792180 for lml@lancaironline.net; Wed, 03 Oct 2012 17:34:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.83.52; envelope-from=dave.saylor.aircrafters@gmail.com Received: by eekb57 with SMTP id b57so3581131eek.25 for ; Wed, 03 Oct 2012 14:34:24 -0700 (PDT) Received: by 10.14.205.9 with SMTP id i9mr4627394eeo.21.1349300064717; Wed, 03 Oct 2012 14:34:24 -0700 (PDT) MIME-Version: 1.0 Received: by 10.14.202.193 with HTTP; Wed, 3 Oct 2012 14:33:44 -0700 (PDT) In-Reply-To: References: From: Dave Saylor X-Original-Date: Wed, 3 Oct 2012 14:33:44 -0700 X-Original-Message-ID: Subject: Re: [LML] Re: Alternate Static Requirement X-Original-To: Lancair Mailing List Content-Type: multipart/alternative; boundary=047d7b343cf40d897b04cb2e67e6 --047d7b343cf40d897b04cb2e67e6 Content-Type: text/plain; charset=UTF-8 Dang paragraph (g)! Actually that's probably a good thing. Dave Saylor 831-750-0284 CL On Wed, Oct 3, 2012 at 11:20 AM, wrote: > ** > Uh, Lancairs are not approved for operation in known icing conditions.. > > Grayhawk > > In a message dated 10/3/2012 1:05:08 P.M. Central Daylight Time, > dave.saylor.aircrafters@gmail.com writes: > > FAR 23.1325 Static pressure system. > > (b)(3) If a static pressure system is provided for any instrument, device, > or system required by the operating rules of this chapter, each static > pressure port must be designed or located in such a manner that the > correlation between air pressure in the static pressure system and true > ambient atmospheric static pressure is not altered when the airplane > encounters icing conditions. An antiicing means or an alternate source of > static pressure may be used in showing compliance with this requirement. If > the reading of the altimeter, when on the alternate static pressure system > differs from the reading of the altimeter when on the primary static system > by more than 50 feet, a correction card must be provided for the alternate > static system. > > ****************************************************** > > The way I read this is that if you don't have a heated static port, and > there's any chance that ice will block your static port, you need an > alternate static, VFR or IFR. I know this seems to apply to "normal, > utility, etc., and not experimentals, but your op limits will say you need > a static check per part 43 appendix E, which then refers back to part 23. > > We had an a customer's plane go all goofy when water in the static line > would freeze at altitude. Utterly VFR but an alternate static source still > would have come in handy. > > McMaster-Carr makes an nice little valve (P/N 6791T21) that looks like a > toggle switch that fits the bill nicely. It's about $15. > > Dave Saylor > 831-750-0284 CL > > --047d7b343cf40d897b04cb2e67e6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Dang paragraph (g)!=C2=A0 Actually that's probably a good thing.
Dave Saylor
831-750-0284 CL


On Wed, Oct 3, 2012 at 11:20 AM, <Sky2h= igh@aol.com> wrote:
Uh, Lancairs are not approved for operation in known=C2=A0icing=20 conditions..
=C2=A0
Grayhawk
=C2=A0
In a message dated 10/3/2012 1:05:08 P.M. Central Daylight Time,=20 dave= .saylor.aircrafters@gmail.com writes:
FAR 23.1325=C2=A0=C2=A0=C2=A0Static pressure system.

(b)(3) If a static pressure system is provided for any instrument, dev= ice,=20 or system required by the operating rules of this chapter, each static=20 pressure port must be designed or located in such a manner that the=20 correlation between air pressure in the static pressure system and true= =20 ambient atmospheric static pressure is not altered when the airplane=20 encounters icing conditions. An antiicing means or an alternate source of= =20 static pressure may be used in showing compliance with this requirement. = If=20 the reading of the altimeter, when on the alternate static pressure syste= m=20 differs from the reading of the altimeter when on the primary static syst= em by=20 more than 50 feet, a correction card must be provided for the alternate s= tatic=20 system.

******************************************************

The way I read this is that if you don't have a heated static port= , and=20 there's any chance that ice will block your static port, you need an = alternate=20 static, VFR or IFR.=C2=A0 I know this seems to apply to "normal, uti= lity,=20 etc., and not experimentals, but your op limits will say you need a stati= c=20 check per part 43 appendix E, which then refers back to part 23.

We had an a customer's plane go all goofy when water in the static= line=20 would freeze at altitude.=C2=A0 Utterly VFR but an alternate static sourc= e=20 still would have come in handy.

McMaster-Carr makes an nice little valve (P/N 6791T21) that looks like= a=20 toggle switch that fits the bill nicely.=C2=A0 It's about $15.

Dave Saylor

831-750-0284=20 CL

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