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Hi Ed,
Sorry to hear about your hangar, but happy you were not at home. You seem
to have your share of good news , bad news stories.
Yea, I'm thinking that when you load the engine with more torque at mid rpm
range with this prop that you can not lean. Had riched up some after the first
hic-up and it still did it later.
Ran the engine up thursday afternoon and it has been stumbling momentarily
when I do the primary/secondary injector check preflight. Did it at lower than
normal power setting and it was grumbling so pushed throttle up and it totally
quit. This was when I turned primary injector off and doubled fuel. It only
starting doing this recently. Tried same thing with secondary off and it ran
just like on both so am suspicious of a secondary injector.
Plan on rerunning this test today and try to watch EGT indicators and see
if one rotor falls off when it is stumbling.
Will also then put new plugs in to see if it does anything, but don't think
so.
Bernie
Hi Bernie,
Just wanted to let you know that on the trip down
to Shady Bend, when I leaned the engine waayyyy back, I get what I refer to as
a "lean miss". This is down around around 5 GPH. It occurs more
frequently the leaner you trim the mixture.
I don't recall the status of your mixture when
you were having the hic-ups but if you were running very lean - it well could
have been simply "lean-miss" and richening the mixture should make it go - a -
way.
Ed
----- Original Message -----
Sent: Thursday, January 12, 2006 10:44
AM
Subject: [FlyRotary] Re: Momentary
pucker X's 3
Hi Bobby,
With this new prop, absorbs lots more power, that is a possibility but
Tracy and I kinda ruled it out this morning. When I fly next, will try to
fly at about the same conditions and record some data.
Bernie
=============================
Was the engine rpms
close to the injector staging point?
Bobby
I had the same thought but the scenario is wrong for this. The
"miss" would happen only at full throttle (usually during climb) and never
at cruise or low power if slipping input shaft were the cause. This
is of course based on one example but logically, that is what you
would expect.
I do intend to add data logging to the EM2 & EC2 but in my
experience so far, it would take a VERY sophisticated diagnostic to detect
this type of problem. None of the aviation type data logging systems
currently on the market will do it. The BMW engine controller (and
probably others) can do it however. The listing of engine fault
codes is over 200 pages long. It can detect and log a single
cylinder miss and tell you which one it was. There are
probably more engineering man hours in that controller than I have
left to live.
Tracy
Subject: [FlyRotary] Re: Momentary
pucker X's 3
Just a lurker here, but could it have been the shaft in
the psru, slipping and rewelding, as just stated on the threads?
Duane Service, Florida
-----Original Message-----
>From:
Charlie England <ceengland@bellsouth.net>
>Sent:
Jan 11, 2006 6:08 PM
>To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>Subject:
[FlyRotary] Re: Momentary pucker X's 3
>
>WALTER B KERR
wrote:
>
>>Flying around the neighborhood today and about
30 minutes into flight
>>there was a momentary hic-up.
Everything on monitor looked normal, so
>>richened a tad and
continued flying. About 5 minutes later, same thing
>>second
verse, and then a third time. Went to full power and rich and
it
>>did not repeat. No miss while descending to land or while
taxing in. Ran
>>up a full static for a minute on the ground
and everything appeared
>>normal.
>>
>>Any
suggestions???
>>
>>Bernie, not wanting to start to
Lakeland with an unknow problem!
>>
>>
>
>Nothing constructive to offer, but is there
a Lyc part hiding under the
>cowl
somewhere?
>
>
>--
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