Today's Message Index:
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1. 01:44 AM - Re: Re: Rotax 914 Turbo Warning Lights (Ivor Phillips)
2. 10:17 AM - Re: Uneven Mag Drop 912 ULS (JohnF)
3. 01:37 PM - Re: Uneven Mag Drop 912 ULS (JohnF)
Message 1
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| Subject: | Re: Rotax 914 Turbo Warning Lights |
I fitted a small float to my expansion bottle wired to a led on my panel, and pleased
to say it's performed well over the last five years,
A couple of years ago one of my water bleed screws developed a leak and it gave
me a heads up earlier than a high water temperature would have done, so worth
doing IMO,
The Rotax900 series are renowned for loosing a bit of coolant from the water pump
drain hole if left inactive for any length of time,
Ivor Phillips
Sent from my iPad
> On 23 May 2014, at 22:13, Robert Borger <rlborger@mac.com> wrote:
>
>
> Hi Alan,
>
> Reasonably well over here. On the final stages of getting my Europa back in
the air after the fuel tank replacement. Have to do some engine ground run tests
tomorrow morning. Positive tests and weather permitting I might have it back
in the air on Sunday. Weather may go to poop on Sunday though. And is certain
forecast for poop on Monday. And I depart for Chennai, India on Tuesday.
Will be there for almost 4 weeks on business. Id like to have the Europa ready
to fly when I get back so I can have some fun and do some cross country travel.
>
> Yes, Blinking lot to remember. Mostly remember that if they come on in flight
its a bad thing.
>
> Not a bad idea to add to the emergency check list either.
>
> As to the coolant levels. Yes, they seem to go down over time. Im not sure
why. Give me some recent flight time starting in late June and well see what
we come up with. As to a warning light for coolant level, I guess thatd be your
coolant or CHT temperature indicators.
>
> Enjoy the good weather while you can!
>
> Best,
> Bob
>
>
> On May 23, 2014, at 12:58 PM, Alan Carter <alancarteresq@onetel.net> wrote:
>
>
> Hi Bob.
> Hope you are well, nice weather here in the UK.
> Well ," Blinking" lot to remember.
> I will make up a small emergency check list for that lot.
> Many thanks,
> Alan
>
>
>
>
>
Message 2
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| Subject: | Re: Uneven Mag Drop 912 ULS |
The mystery deepens
I ran the engine after new plugs on the A side and now the problem has shifted
to the B side.
I was getting too much rpm drop when the B side was turned off, now the excessive
rpm drop occurs when the A side is turned off.
First mag drop checks at 3500 showed 70 rpm drop running with the B side only operating,
and 170 rpm drop when the A side only was operating.
Then at 4,000 rpm the first mag checks showed a rpm drop of 160 and 130 on A and
B side. I thought it was fixed...but....
Subsequent mag checks consistently showed the when the A side was killed the rpm
dropped an average of 385 rpm (4 tries), and when the B side was killed the
average of 4 tries showed a drop of 120 rpm.
This switching of excessive mag drop from the A side to the B side seems
to indicate some sort of bad connection or other intermittent fault.
Its interesting to note that the first tries showed normal and acceptable rpm drops
as the mags were 'killed' but subsequent tries showed bad drops on the opposite
side from yesterday's trials.
I am really confused now.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=423744#423744
Message 3
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| Subject: | Re: Uneven Mag Drop 912 ULS |
I have been really thinking about this problem, and recalled that two years ago
I had a situation where I was getting serious rpm drops during mag checks. A
local A&P and an experienced RV builder were helping me. We noticed that if the
top cowling was off everything was fine. When fully assembled with the top cowling
back on, the mag drop was seriously down again.
I found an exhaust pipe slightly out of the 'socket' on the muffler. When fully
cowled the engine was 'sucking' up exhaust fumes, and naturally the engine didn't
work well. With the top cowling off there was plenty of free air and the
engine worked fine.
I am going to pull the cowling again and closely inspect for possible exhaust leaks.
Anything else you can suggest?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=423749#423749
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