X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 07 Sep 2009 19:00:39 -0400 Message-ID: X-Original-Return-Path: Received: from col0-omc3-s7.col0.hotmail.com ([65.55.34.145] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3838445 for lml@lancaironline.net; Sat, 05 Sep 2009 21:40:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.55.34.145; envelope-from=gt_phantom@hotmail.com Received: from COL101-W21 ([65.55.34.137]) by col0-omc3-s7.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sat, 5 Sep 2009 18:36:14 -0700 X-Original-Message-ID: X-Original-Return-Path: gt_phantom@hotmail.com Content-Type: multipart/alternative; boundary="_30992251-96c7-4746-9ac5-4e1b73d401e1_" X-Originating-IP: [68.211.166.163] From: GT PHANTOM X-Original-To: , Subject: Re: Trutrak Sorcerer Autopilot Operating Question X-Original-Date: Sat, 5 Sep 2009 21:36:13 -0400 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 06 Sep 2009 01:36:14.0182 (UTC) FILETIME=[6BC78060:01CA2E92] --_30992251-96c7-4746-9ac5-4e1b73d401e1_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable John=2C=20 Don't know Chelton specifically=2C but generally speaking the EFIS HITS approaches do NOT correspond exactly with the ILS or GPS glide paths - they are typically based on a synthetic approach to the approach end of the runway at a "standard" approach angle. Check your Chelton manuals to confirm this. In any event=2C the ONLY thing you should compare the approach to is the glide path / course needles. If they stay centered=2C the TT is doing it's job perfectly. Regards=2C Bill John Hafen wrote: Trutrak Sorcerer Autopilot Operating Question Gents: =20 In my IVP=2C I have a Trutrak Sorcerer Autopilot wired to a Chelton twin screen system. =20 I shot a few GPS approaches today and everything seemed to work ok=2C except that the decent after the IAF seemed to lag behind the HITS green squares. The plane was going down=2C on the =93glide slope=94 but no= t as aggressively as it should have. Kind of hanging out near the top=2C or slightly above the green boxes. It was a GPS approach that I initiated by hitting the GPSV button on the Sorcerer. =20 I know that altitude transitions can be made by airspeed=2C vertical speed=2C or horizontal distance (VNAV). So if my descent was lagging=2C I wonder if I need to go into Pitch Setup mode and play with the vertical activity or vertical torque. Or some other parameter. =20 Or is there a way to specify a certain airspeed or V-speed for the descent =97 or is it just supposed to center the boxes. =20 I apologize for rambling a little here. I suppose my fundamental question is how to make the auto pilot fly the descent right in the middle of the green boxes...... What Am I Missing?=20 =20 Many thanks and Regards. =20 John Hafen IVP N413AJ 175 hours _________________________________________________________________ Windows Live: Keep your friends up to date with what you do online. http://windowslive.com/Campaign/SocialNetworking?ocid=3DPID23285::T:WLMTAGL= :ON:WL:en-US:SI_SB_online:082009= --_30992251-96c7-4746-9ac5-4e1b73d401e1_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable John=2C

Don't know Chelton specifically=2C but generally speaking the EFIS HITS approaches do NOT correspond exactly with the ILS or GPS glide paths - they are typically based on a synthetic approach to the approach end of the runway at a "standard" approach angle. =3B Check your Chelton manua= ls to confirm this.

In any event=2C the ONLY thing you should compare the approach to is the glide path / course needles. If they stay centered=2C the TT is doing it's job perfectly.

Regards=2C

Bill


John Hafen wrote:
Trutrak Sorcerer Autopilot Operating Question Gents:

In my IVP=2C I have a Trutrak Sorcerer Autopilot wired to a Chelton twin screen system.

I shot a few GPS approaches today and everything seemed to work ok=2C except that the decent after the IAF seemed to lag behind the HITS green squares.  =3BThe plane was going down=2C on the “=3Bglide sl= ope”=3B but not as aggressively as it should have. Kind of hanging out near the top=2C or slightly above the green boxes. It was a GPS approach that I initiated by hitting the GPSV button on the Sorcerer.

I know that altitude transitions can be made by airspeed=2C vertical speed=2C or horizontal distance (VNAV). So if my descent was lagging=2C I wonder if I need to go into Pitch Setup mode and play with the vertical activity or vertical torque. Or some other parameter.

Or is there a way to specify a certain airspeed or V-speed for the descent —=3B or is it just supposed to center the boxes.

I apologize for rambling a little here. I suppose my fundamental question is how to make the auto pilot fly the descent right in the middle of the green boxes...... What Am I Missing?

Many thanks and Regards.

John Hafen
IVP N413AJ 175 hours

Windows Live: Keep your friends up to date with what you do onl= ine. Find out = more. = --_30992251-96c7-4746-9ac5-4e1b73d401e1_--