X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 07 Dec 2009 09:41:59 -0500 Message-ID: X-Original-Return-Path: Received: from col0-omc3-s11.col0.hotmail.com ([65.55.34.149] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4005039 for lml@lancaironline.net; Sun, 06 Dec 2009 14:33:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.34.149; envelope-from=bill_kennedy_3@hotmail.com Received: from COL108-W44 ([65.55.34.136]) by col0-omc3-s11.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sun, 6 Dec 2009 11:32:25 -0800 X-Original-Message-ID: X-Original-Return-Path: bill_kennedy_3@hotmail.com Content-Type: multipart/alternative; boundary="_f493a1e5-ad73-4d13-83f0-bc5438bafb9e_" X-Originating-IP: [71.111.139.49] From: Bill Kennedy X-Original-To: Subject: RE: [LML] basic aerobatics in a 360 X-Original-Date: Sun, 6 Dec 2009 11:32:25 -0800 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 06 Dec 2009 19:32:25.0706 (UTC) FILETIME=[D6FF64A0:01CA76AA] --_f493a1e5-ad73-4d13-83f0-bc5438bafb9e_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Here's my experience: My engine will crap out (hickup) as I get close to ze= ro 'g' (I think it's because of my carb/float bowl). I can do almost all ac= ro without any zero or negative 'g'. My rolls are barrel rolls=2C not ailer= on rolls. I've often had a brief hickup doing them=2C though a barrel roll = can be done without really low 'g' force. The roll on a point during cuban-= eights is so fast that I haven't experienced a hickup. I've always though t= he lazy-eight is a great maneuver with the Lancair=2C and I've never experi= enced any hickup doing them. I doubt that the hickup could cause any harm to the engine=2C but low oil p= ressure sure could -- avoid it. I would vote for COMPLETELY avoiding zero a= nd negative 'g'. Most of the maneuvers can be done without going to less th= an 1/2 'g'. Add slow flight maneuvering to your regimen. It's a great way to stall proo= f yourself and make your coordinated control inputs nearly instinctive. Most of the non-normal flight maneuvers I do are limited to lazy-eights (th= ey're a thing of beauty)=2C chaundels (sp)=2C and extreme slow-flight. They= all have a very direct pay-off in developing a real feel for the airplane = at very low risk.=20 Statistics suggest that there are significant risks involved for you doing = this stuff. Make sure it pays off. > To:=20 > Date: Sun=2C 6 Dec 2009 12:32:22 -0500 > From: keith.smith@gmail.com > Subject: [LML] basic aerobatics in a 360 >=20 > I'm thinking of doing some relatively basic aerobatics in my 360=2C > basically loops=2C barrel rolls=2C and anything else with continuous > positive G. >=20 > The area where I'm a little hazy is any maneuver with brief moments of > zero or even -1G. Are these to be COMPLETELY avoided=2C or is it ok for > very brief stints. I'm concerned about the prop and engine. My > knowledge of the internals of the engine are weak=2C but from the little > I know=2C without an inverted oil system=2C prolonged inverted flight > isn't an option. My question is=2C is 0 to -1G acceptable for 1-2 > seconds? I'm thinking here of aileron rolls=2C or cuban eights. >=20 > I don't have my heart set on doing those=2C per se=2C but just want to > know where it would be smart to draw the line. I know the airframe can > handle all of that=2C and then some=2C it's a question of the engine and > prop. >=20 > Thanks for any advice. >=20 > Keith > N360JH LNC2 >=20 > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht= ml = --_f493a1e5-ad73-4d13-83f0-bc5438bafb9e_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Here's my experience: My engine will crap out (hickup) as I get close to ze= ro 'g' (I think it's because of my carb/float bowl). I can do almost all ac= ro without any zero or negative 'g'. My rolls are barrel rolls=2C not ailer= on rolls. I've often had a brief hickup doing them=2C though a barrel roll = can be done without really low 'g' force. The roll on a point during cuban-= eights is so fast that I haven't experienced a hickup. I've always though t= he lazy-eight is a great maneuver with the Lancair=2C and I've never experi= enced any hickup doing them.

I doubt that the hickup could cause any= harm to the engine=2C but low oil pressure sure could -- avoid it. I would= vote for COMPLETELY avoiding zero and negative 'g'. Most of the maneuvers = can be done without going to less than 1/2 'g'.

Add slow flight mane= uvering to your regimen. It's a great way to stall proof yourself and make = your coordinated control inputs nearly instinctive.

Most of the non-= normal flight maneuvers I do are limited to lazy-eights (they're a thing of= beauty)=2C chaundels (sp)=2C and extreme slow-flight. They all have a very= direct pay-off in developing a real feel for the airplane at very low risk= .

Statistics suggest that there are significant risks involved for = you doing this stuff. Make sure it pays off.

>=3B To:
>=3B D= ate: Sun=2C 6 Dec 2009 12:32:22 -0500
>=3B From: keith.smith@gmail.com=
>=3B Subject: [LML] basic aerobatics in a 360
>=3B
>=3B I'= m thinking of doing some relatively basic aerobatics in my 360=2C
>=3B= basically loops=2C barrel rolls=2C and anything else with continuous
&g= t=3B positive G.
>=3B
>=3B The area where I'm a little hazy is a= ny maneuver with brief moments of
>=3B zero or even -1G. Are these to= be COMPLETELY avoided=2C or is it ok for
>=3B very brief stints. I'm= concerned about the prop and engine. My
>=3B knowledge of the intern= als of the engine are weak=2C but from the little
>=3B I know=2C witho= ut an inverted oil system=2C prolonged inverted flight
>=3B isn't an o= ption. My question is=2C is 0 to -1G acceptable for 1-2
>=3B seconds?= I'm thinking here of aileron rolls=2C or cuban eights.
>=3B
>= =3B I don't have my heart set on doing those=2C per se=2C but just want to<= br>>=3B know where it would be smart to draw the line. I know the airfram= e can
>=3B handle all of that=2C and then some=2C it's a question of t= he engine and
>=3B prop.
>=3B
>=3B Thanks for any advice.>=3B
>=3B Keith
>=3B N360JH LNC2
>=3B
>=3B --
= >=3B For archives and unsub http://mail.lancaironline.net:81/lists/lml/Li= st.html
= --_f493a1e5-ad73-4d13-83f0-bc5438bafb9e_--