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 receiver=logan.com; client-ip=76.96.27.211; envelope-from=hoursaway1@comcast.net
Date: Thu, 22 Aug 2013 22:46:59 +0000 (UTC)
From: hoursaway1@comcast.net
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message-ID: <124533051.2488907.1377211619030.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net>
In-Reply-To: <list-6436998@logan.com>
Subject: Re: [FlyRotary] Re: Fuel map scrambled.
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Bobby, my map is ( was ) still set to factory with all bars in the center, =
after landing I thought to check EM2 screen with mapping bars & discovered =
half were still at center & half were all the way to the bottom/lean. I had=
 not changed anything for aprox. 15 min. of flight, then suddenly ruff runn=
ing. I just responded to Mark & mentioned that the only thing diff. from pr=
ev. 10 hrs. was I had both landing & taxi lights on this flight. David=20

----- Original Message -----
From: "Bobby J. Hughes" <bhughes@qnsi.net>=20
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>=20
Sent: Thursday, August 22, 2013 6:20:32 AM=20
Subject: [FlyRotary] Re: Fuel map scrambled.=20


David=20


If you recorded your fuel map values you should compare each address to tho=
se numbers and see if they have changed or become corrupt. It could be fuel=
 pressure / regulator problems, manifold pressure etc.=20


If you adjusted your prop when the problem happened then you could have hit=
 a address that was not tuned on the ground. Not likely. I do all ground tu=
ning with prop set for 2100 rpm in fixed pitch mode.=20


My finger is always close to the controller A/B switch during takeoff and i=
nitial climb. Fuel mixture is number one on my check list and A/B switch is=
 number two.=20


Glad you made it down safely.=20


Bobby Hughes=20

Sent from my iPad=20

On Aug 21, 2013, at 10:10 PM, " hoursaway1@comcast.net " < hoursaway1@comca=
st.net > wrote:=20


1st..... am now on the ground safe & sound, no damage normal landing. The s=
tory goes....... Level at 2500' above Mason Jewett Field, ( hazy evening, a=
prox. 7:30 pm ) on the down wind abeam of the end of the runway, 4600 rpm, =
? MAP, 125 MPH ind., 3rd circle around the patch getting ready to put in fu=
ll cruise pitch on prop to do a full throttle numbers gathering. Then the e=
ng. started running very poorly, missing, stumbling hard, destict loss of p=
ower, tryed to descend & come around to land but am high & hot with ( RV's =
need air brakes ) eng. smoothed out, chose a sweet spot & climbed out to go=
 around,,, low but climbing, ran smooth 4000 rpm, landed ok. Before shutdow=
n, checked fuel map bars for EC2 on EM2, some in the middle some at the bot=
tom,,,Lean,,, why did the fuel map scramble suddenly, steady cruise flight,=
 made no changes at that time? At the airport by 6:30, pull plane from hang=
er to do two tests tonight, 1st. run eng. at low power/idle like sitting in=
 line for takeoff from Osh or ?, how long can we stay running without getti=
ng to hot, 18 min. coolant 205 F, oil 175 F, ok that's good enough for me l=
ets go fly & do the prop full cruise pitch test run. That was the start of =
the evening, ended differently than I would have liked. But nothing bent. D=
id not reset EC2 yet, am going to start eng. & check to see if computer B r=
uns ok, did not get a chance to throw that switch, when I found the sweet s=
pot I changed nothing, just came around & landed. What is the fix for this =
anomaly?? David R Cook RV6A Rotary=20


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<html><head><style type=3D'text/css'>p { margin: 0; }</style></head><body><=
div style=3D'font-family: Arial; font-size: 12pt; color: #000000'>Bobby, my=
 map is ( was ) still set to factory with all bars in the center, after lan=
ding I thought to check EM2 screen with mapping bars &amp; discovered half =
were still at center &amp; half were all the way to the bottom/lean.&nbsp; =
I had not changed anything for aprox. 15 min. of flight, then suddenly ruff=
 running.&nbsp; I just responded to Mark &amp; mentioned that the only thin=
g diff. from prev. 10 hrs. was I had both landing &amp; taxi lights on this=
 flight.&nbsp; David <br><br><hr id=3D"zwchr"><b>From: </b>"Bobby J. Hughes=
" &lt;bhughes@qnsi.net&gt;<br><b>To: </b>"Rotary motors in aircraft" &lt;fl=
yrotary@lancaironline.net&gt;<br><b>Sent: </b>Thursday, August 22, 2013 6:2=
0:32 AM<br><b>Subject: </b>[FlyRotary] Re: Fuel map scrambled.<br><br><div>=
David</div><div><br></div><div>If you recorded your fuel map values you sho=
uld compare each address to those numbers and see if they have changed or b=
ecome corrupt. It could be fuel pressure / regulator problems, manifold pre=
ssure etc. &nbsp;</div><div><br></div><div>If you adjusted your prop when t=
he problem happened then you could have hit a address that was not tuned on=
 the ground. &nbsp;Not likely. I do all ground tuning with prop set for 210=
0 rpm in fixed pitch mode.&nbsp;</div><div><br></div><div>My finger is alwa=
ys close to the controller A/B switch during takeoff and initial climb. Fue=
l mixture is number one on my check list and A/B switch is number two. &nbs=
p;&nbsp;</div><div><br></div><div>Glad you made it down safely.&nbsp;</div>=
<div><br></div><div>Bobby Hughes</div><div><br>Sent from my iPad</div><div>=
<br>On Aug 21, 2013, at 10:10 PM, "<a href=3D"mailto:hoursaway1@comcast.net=
" target=3D"_blank">hoursaway1@comcast.net</a>" &lt;<a href=3D"mailto:hours=
away1@comcast.net" target=3D"_blank">hoursaway1@comcast.net</a>&gt; wrote:<=
br><br></div><blockquote><div><div style=3D"font-family: Arial; font-size: =
12pt; color: #000000">1st..... am now on the ground safe &amp; sound, no da=
mage normal landing. &nbsp;&nbsp; The story goes....... Level at 2500' abov=
e Mason Jewett Field,&nbsp; (&nbsp; hazy evening, aprox. 7:30 pm&nbsp; )&nb=
sp; on the down wind abeam of the end of the runway, &nbsp; 4600 rpm,&nbsp;=
 ? MAP,&nbsp; 125 MPH&nbsp; ind.,&nbsp; 3rd circle around the patch getting=
 ready to put in full cruise pitch on prop to do a full throttle numbers ga=
thering.&nbsp; Then the eng. started running very poorly,&nbsp; missing, st=
umbling hard, destict loss of power,&nbsp; tryed to descend &amp; come arou=
nd&nbsp; to land but am high &amp; hot with&nbsp; (&nbsp; RV's need air bra=
kes )&nbsp; eng. smoothed out, chose a sweet spot &amp; climbed out to go a=
round,,, low&nbsp; but climbing,&nbsp; ran smooth 4000 rpm,&nbsp; landed ok=
.&nbsp; Before shutdown,&nbsp; checked fuel map bars for EC2&nbsp; on EM2,&=
nbsp; some in the middle some at the bottom,,,Lean,,, why did the fuel map =
scramble suddenly,&nbsp; steady cruise flight, made no changes at that time=
?&nbsp; At the airport by 6:30,&nbsp; pull plane from hanger to do two test=
s tonight, 1st. run eng. at low power/idle like sitting in line for takeoff=
 from Osh or ?,&nbsp; how long can we stay running without getting to hot, =
18 min. coolant 205 F,&nbsp; oil 175 F,&nbsp; ok that's good enough for me =
lets go fly &amp; do the prop full cruise pitch test run.&nbsp; That was th=
e start of the evening, ended differently than I would have liked.&nbsp; Bu=
t nothing bent. &nbsp; Did not reset EC2&nbsp; yet, am going to start eng. =
&amp; check to see if computer B runs ok, did not get a chance to throw tha=
t switch, when I found the sweet spot I changed nothing, just came around &=
amp; landed.&nbsp; What is the fix for this anomaly?? &nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp; David R Cook&nbsp; RV6A&nbsp; Rotary<br></div></div></blockquo=
te></div></body></html>
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