From: "steve Izett" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Tuning
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Date: Sun, 7 Aug 2016 22:13:44 +0800
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Good news Andrew.
Look forward to hearing more. (Good that is).

Steve Izett
> On 7 Aug 2016, at 10:04 PM, Andrew Martin =
<flyrotary@lancaironline.net> wrote:
>=20
> Had some success this weekend, for once things seemed to fall into =
place. Seems I don't always know what I don't know, I thought I had a =
good tune but in reality not good enough as my attempts at flight have =
not given confidence to continue so have been landing asap. I'm pretty =
sure it was running very rich to the point of nearly flooding. Some =
things are ingrained from past years, leaning on climb is not one of =
them, better to land and figure it out.
>=20
> So on Friday decided to put EC2 back to defaults and start fresh. Best =
decision I made so far and I reckon it should be suggested to do more =
often as Tracy's defaults are just about spot on, managed to bugger it =
up though, no worries, its all learning.
>=20
> Some noise had been noted by locals at the airport on a number of =
occasions, to try and keep them happy on Saturday I quickly knocked up a =
silencer and shoved it in the end of the exhaust. Yeah, its quieter, but =
bugger me, the egt's now match and the O2 sensor is way more stable. I =
think the O2 sensor maybe was not getting hot enough and/or getting =
oxygen in from the end of the exhaust giving a lean indication, as such =
I had been tuning way too rich. The black in the exhaust should have =
alerted me to this, but no.
> The egt's matching is I guess due to a bit of back pressure in the =
exhaust, don't care really, as its fixed without invoking mode 4.
>=20
> Night time reading usually consists of a search of the Flyrotary =
archives to catch up on some of what I've missed. Its a bit of a lucky =
dip but last night brought up a gem, #50149 , Feb 2010 ,Tracy in reply =
to Bill B giving the then current instructions in the manual ( my manual =
is 2 years prior at Dec 07), so first thing this morning, print it and =
off to the airport. Reset everything, set prop mid pitch, follow =
instructions. This is the best tune so far, smooth from idle to full =
noise. So now I know a little more.
> Will give it another hour or so at all throttle & prop settings then =
try another flight this week, after helping put a new PT6 turbine & prop =
in the Thrush, Pilot collected a powerline on a spray run.
>=20
> Andrew
>=20
>=20
> --=20
> Regards
> Andrew Martin
> Martin Ag