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Fergus Kyle
Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada
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 Posted: Wed Jul 28, 2010 10:53 am Post subject: Negative "G" |
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This may not be the place to ask, but experience here might be better than elsewhere. My question (following the MG specs sheet regarding neg G) is:
I believe the Rotax restriction on the 900 series engines is NO Neg G, yet several have remarked on “jinking” the undercarriage to lock recalcitrant outriggers and similar moves. What is the proper limit? – is an instantaneous neg G manoeuvre a No-no or is there perhaps some leeway ( No inverted flight, etc.)?
What thinkest thou sirrah?
Cheers Ferg
[quote][b]
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Thu Jul 29, 2010 7:49 am Post subject: Re: Negative |
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The engine will stop after a few seconds due to fuel starvation.
You may also draw air into the fine oil channels that we must carefully
purge after opening the lower portions of oil system.
I have not methodically flight tested negative g, but have seen a few
awkward akro moments and some moderate turbulence. A second or
two of neg 1 g should be no problem in my opinion.
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keithhickling(at)clear.ne
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| Posted: Mon Aug 02, 2010 4:24 pm Post subject: Negative "G" |
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Hi Ferg,
see page 10-1, 912 operator's manual Jan 2007. Max 5 seconds at negative 0.5g
Keith Hickling,
New Zealand.
-----Original Message-----
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Fergus Kyle
Sent: Thursday, 29 July 2010 6:52 a.m.
To: 5EUROPALIST
Subject: Negative "G"
This may not be the place to ask, but experience here might be better than elsewhere. My question (following the MG specs sheet regarding neg G) is:
I believe the Rotax restriction on the 900 series engines is NO Neg G, yet several have remarked on “jinking” the undercarriage to lock recalcitrant outriggers and similar moves. What is the proper limit? – is an instantaneous neg G manoeuvre a No-no or is there perhaps some leeway ( No inverted flight, etc.)?
What thinkest thou sirrah?
Cheers Ferg [quote] - The Europa-List Email Forum - --> http://www.matronics.com/Navigator?Europa-List - MATRONICS WEB FORUMS - --> http://forums.matronics.com - List Contribution Web Site - Thank you for your generous support! -Matt Dralle, List Admin. --> http://www.matronics.com/contribution [b]
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kevinmarie(at)blueyonder.
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| Posted: Mon Aug 02, 2010 11:21 pm Post subject: Negative "G" |
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I find the engine coughs/misses a beat if you neg g for too long/hard which i think the spitfire did as well (carb floats coming up and shutting the fuel off).
Kevin Challis
On 3 Aug 2010, at 01:17, keith hickling <keithhickling(at)clear.net.nz (keithhickling(at)clear.net.nz)> wrote:
[quote] <![endif]--> Clean Clean DocumentEmail MicrosoftInternetExplorer4 <![endif]--> st1\:*{behavior:url(#default#ieooui) } <![endif]--> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} <![endif]-->
Hi Ferg,
see page 10-1, 912 operator's manual Jan 2007. Max 5 seconds at negative 0.5g
Keith Hickling,
New Zealand.
-----Original Message-----
From: owner-europa-list-server(at)matronics.com (owner-europa-list-server(at)matronics.com) [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Fergus Kyle
Sent: Thursday, 29 July 2010 6:52 a.m.
To: 5EUROPALIST
Subject: Negative "G"
This may not be the place to ask, but experience here might be better than elsewhere. My question (following the MG specs sheet regarding neg G) is:
I believe the Rotax restriction on the 900 series engines is NO Neg G, yet several have remarked on “jinking” the undercarriage to lock recalcitrant outriggers and similar moves. What is the proper limit? – is an instantaneous neg G manoeuvre a No-no or is there perhaps some leeway ( No inverted flight, etc.)?
What thinkest thou sirrah?
Cheers Ferg 01234567890123
4
[b]
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