X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nskntmtas06p.mx.bigpond.com ([61.9.168.152] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTP id 6459579 for flyrotary@lancaironline.net; Mon, 09 Sep 2013 01:09:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=61.9.168.152; envelope-from=neil.unger@bigpond.com Received: from nskntcmgw08p ([61.9.169.168]) by nskntmtas06p.mx.bigpond.com with ESMTP id <20130909050859.AEE2028.nskntmtas06p.mx.bigpond.com@nskntcmgw08p> for ; Mon, 9 Sep 2013 05:08:59 +0000 Received: from UserPC ([121.212.134.13]) by nskntcmgw08p with BigPond Outbound id Nt8u1m0160HWetl01t8vJs; Mon, 09 Sep 2013 05:08:59 +0000 X-Authority-Analysis: v=2.0 cv=MrvQGhme c=1 sm=1 a=NCTKrlPEi1JBv3gWgoJYYA==:17 a=-yno0YABMgYA:10 a=JDadKst33uMA:10 a=1IlZJK9HAAAA:8 a=Jmma18LPHAIA:10 a=3oc9M9_CAAAA:8 a=PkJpBb1a65HwW96pMf4A:9 a=wPNLvfGTeEIA:10 a=U8Ie8EnqySEA:10 a=Ia-xEzejAAAA:8 a=v-E_inDaMiVp9vVgD0IA:9 a=_W_S_7VecoQA:10 a=EzXvWhQp4_cA:10 a=iWjNQcjkFImHZHsb:21 a=NCTKrlPEi1JBv3gWgoJYYA==:117 Message-ID: <8DDBFF6BAC2E4DB4A12237082DFA6E7D@UserPC> From: "Neil Unger" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] First Flight jitters Date: Mon, 9 Sep 2013 15:08:53 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CEAD6E.7F7B7C10" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CEAD6E.7F7B7C10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Great news, but there comes a time where you have to replace your = diaper, grit your teeth and let it fly. Adrenalin is a great aid. One = thing that tracy said to me is to never forget that the EMC is still a = manual control even after all the tuning on the ground. Remember to = richen for take off! Best advice I have had about his EMC. Neil. From: shipchief@aol.com=20 Sent: Monday, September 09, 2013 2:47 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] First Flight jitters I've been slowly building my RV-8 with 13BT engine for about 14 = years...! On June 13th 2013 it received the coveted Airworthiness Certificate. = That same day I detonated my engine due to the trailing spark plug holes = being machined oversize in an attempt to improve the single spark plug = power, should the leading plug ignition fail. This, and possibly = advanced ignition, and possibly over-boost detonated my engine on it's = first high power taxi test. That took about 2.5 seconds. Now I've rebuilt the engine with new unmodified rotor housings, and it = runs better than ever. I've re-marked the timing marks on the pulley, = and reset the timing, though not to 4000 RPM yet. today I checked it. At = 3000 RPM my hat and hearing protection blew off. 11 degrees BTDC, and = 16" manifold pressure. I've been taxiing around at modest RPM, it's great. I've consistently = been idling at about 1600 RPM, (730 prop RPM) and sometimes as low as = 1490, (680 Prop RPM) smoothly. That is slow enough to keep the brakes = from getting too hot. I've done run ups and brief bursts of power to 4200 Engine RPM, (1917 = Prop RPM) which is about 32" manifold pressure, and seen 37" manifold = pressure briefly. I know this is not enough power to take off, although = I have done a Pre-take off to 50 MPH with this power before powering = down with roll out to the end of the runway. I suppose it would fly off = and maybe clear the trees at this power. I've lifted the tail, and = rocked the wings with the ailerons. It steers well and the brakes work.=20 The water level in the engine stays up between flights as does the oil, = and the water temp today was consistent 163 F oil about 173 with the = highest observed 183F. I did about 4 pre-take off passes with taxi back, = with excellent temperature control and throttle response.=20 A couple of oil fitting were tightened looking for an oil seep. 7.3 hours engine running time on the EM2, about 2 hours since the engine = overhaul. I don't think I'm at all ready to fly this thing. I'm missing something, = so offer up some advice, I'm all ears! ------=_NextPart_000_0009_01CEAD6E.7F7B7C10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Great news, but there comes a time where you have to replace your = diaper,=20 grit your teeth and let it fly.  Adrenalin is a great aid.  = One thing=20 that tracy said to me is to never forget that the EMC is still a manual = control=20 even after all the tuning on the ground. Remember to richen for take = off! =20 Best advice I have had about his EMC.  Neil.
 
Sent: Monday, September 09, 2013 2:47 PM
Subject: [FlyRotary] First Flight jitters
 
I've been slowly = building my=20 RV-8 with 13BT engine for about 14 years...!
On June 13th 2013 it received the coveted Airworthiness = Certificate. That=20 same day I detonated my engine due to the trailing spark plug holes = being=20 machined oversize in an attempt to improve the single spark plug power, = should=20 the leading plug ignition fail. This, and possibly advanced ignition, = and=20 possibly over-boost detonated my engine on it's first high power taxi = test. That=20 took about 2.5 seconds.
Now I've rebuilt the engine with new unmodified rotor housings, and = it runs=20 better than ever. I've re-marked the timing marks on the pulley, and = reset the=20 timing, though not to 4000 RPM yet. today I checked it. At 3000 RPM my = hat and=20 hearing protection blew off. 11 degrees BTDC, and 16" manifold = pressure.
I've been taxiing around at modest RPM, it's great. I've = consistently been=20 idling at about 1600 RPM, (730 prop RPM) and sometimes as low as 1490, = (680 Prop=20 RPM) smoothly. That is slow enough to keep the brakes from getting too=20 hot.
I've done run ups and brief bursts of power to 4200 Engine RPM, = (1917 Prop=20 RPM) which is about 32" manifold pressure, and seen 37" manifold = pressure=20 briefly. I know this is not enough power to take off, although I have = done a=20 Pre-take off to 50 MPH with this power before powering down with roll = out to the=20 end of the runway.  I suppose it would fly off and maybe clear the = trees at=20 this power. I've lifted the tail, and rocked the wings with the = ailerons. It=20 steers well and the brakes work.
The water level in the engine stays up between flights as does the = oil, and=20 the water temp today was consistent 163 F oil  about 173 with the = highest=20 observed 183F. I did about 4 pre-take off passes with taxi back, with = excellent=20 temperature control and throttle response.
A couple of oil fitting were tightened looking for an oil = seep.
7.3 hours engine running time on the EM2, about 2 hours since the = engine=20 overhaul.
I don't think I'm at all ready to fly this thing. I'm missing = something, so=20 offer up some advice, I'm all = ears!
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