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To: flyrotary@lancaironline.net
Subject: First Flight jitters
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Date: Mon, 9 Sep 2013 00:47:08 -0400 (EDT)

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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 s=
ame day I detonated my engine due to the trailing spark plug holes being ma=
chined oversize in an attempt to improve the single spark plug power, shoul=
d 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 pre=
ssure.
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 to=
o 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 b=
riefly. 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 t=
rees at this power. I've lifted the tail, and rocked the wings with the ail=
erons. 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 excel=
lent 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 ov=
erhaul.
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!

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<font color=3D'black' size=3D'2' face=3D'arial'>
<div><font style=3D"background-color: transparent;">I've been slowly buildi=
ng my RV-8 with 13BT engine for about 14 years...!</font></div>

<div>On June 13th 2013&nbsp;it received the coveted Airworthiness Certifica=
te. That same day I detonated my engine due to the trailing spark plug hole=
s being machined oversize in an attempt to improve the single spark plug po=
wer, should the leading plug ignition fail. This, and possibly advanced ign=
ition, and possibly over-boost detonated my engine on it's first high power=
 taxi test. That took about 2.5 seconds.</div>

<div>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 R=
PM my hat and hearing protection blew off. 11 degrees BTDC, and 16" manifol=
d pressure.</div>

<div>I've been taxiing around at modest RPM, it's great. I've consistently =
been idling at about 1600 RPM, (730 prop RPM)&nbsp;and sometimes as low as =
1490, (680 Prop RPM)&nbsp;smoothly. That is slow enough to keep the brakes =
from getting too hot.</div>

<div>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 press=
ure briefly. I know this is not enough power to take off, although I have&n=
bsp;done a Pre-take off to 50 MPH with this power before&nbsp;powering down=
&nbsp;with roll out to&nbsp;the end of the runway.&nbsp; 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. </=
div>

<div>The water level in the engine stays up between&nbsp;flights as does th=
e oil, and the water temp today was consistent 163 F oil &nbsp;about 173 wi=
th the highest observed 183F. I did about 4 pre-take off passes with taxi b=
ack, with excellent temperature control and throttle response. </div>

<div>A couple of oil fitting were tightened looking for an oil seep.</div>

<div>7.3 hours engine running time on the EM2, about 2 hours since the engi=
ne&nbsp;overhaul.</div>

<div>I don't think I'm at all ready to fly this thing. I'm missing somethin=
g, so offer up some advice, I'm all ears!</div>
</font>
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