Today's Message Index:
----------------------
1. 05:40 AM - 912UL operating temperature (Richard Lamprey)
2. 10:39 AM - Re: 912UL operating temperature (graeme bird)
3. 12:53 PM - Re: iPad battery charger (Remi Guerner)
4. 12:53 PM - Re: 912UL operating temperature (nigel_graham@m-tecque.co.uk)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | 912UL operating temperature |
Greetings to all from Kenya.
Does anyone know what is the minimum cylinder head (coolant) temperature for normal
operations? The manual gives maximum but no minimum, save for warming up
to above 50C for takeoff power. I was told recently that cylinder head temp
should not be too much below Oil temp, but not sure about this.
Some years ago I had new radiators made by Docking Engineering of Silverstone,
after a leak in the Europa ones. They have proved so efficient that I cannot
get the temp much above 105C after prolonged climb, and it settles to 80-90C in
the cruise, against an oil temp of 105C. I put blanking strips on them to get
the temp a bit higher, to 95C, but took these off to test recently, and down
the temp went. The plugs are fouling up with carbon more now (with the odd
missed beat), which according to the manual is caused by running too cool. But
I cant find that optimum operating temperature stated anywhere. Any ideas
appreciated.
A very simple Europa... 912UL, warp-drive fixed pitch.
Best
Richard
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402782#402782
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: 912UL operating temperature |
Kevin Dilks told me recently that running low was not an issue and a misnomer,
not really affecting efficiency or engine wear.
I have been blanking off my radiator, but now find its getting too hot if I have
to taxi for a while and long climb (probably not helped by the tundra tyre rubbing
slightly).
I measure cylinder head and oil and the cylinder is always hotter.
Regards
--------
Graeme Bird
G-UMPY
Mono 912S/Woodcomp 3000/3W
Newby: 55 hours 1 year
g(at)gdbmk.co.uk
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402799#402799
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: iPad battery charger |
Frans,
I have made some more investigations before reading your message. Here are the
results:
1. Charging my iPad with my charger in another aircraft (Dyn Aero MCR 01): no noise.
2. Charging my iPad with a friend's charger in my aircraft: same noise as with
my own charger.
So it seems that the problem comes from the configuration of my panel and wiring:
my cigar lighter is located very close to the Com radio while in the MCR is
located very far on the passenger side.
3. Charging my iPad with my charger in my aircraft: at the same time I get the
noise in the headset, the same noise is generated in a portable radio located
at about 10 meters from the cockpit.
4. Charging my iPad with my charger in my car: a portable radio placed close
to the iPad or charger does not make noise.
This testing may allow you to better diagnose the cause of the problem.
I will try with the antenna disconnected from the radio later on, as you suggested.
Regards
Remi
[quote="frans(at)privatepilots.nl"]On 06/14/2013 09:30 PM, Guerner Remi wrote:
It may help to establish how the noise gets into the radio. What happens
if you disconnect the antenna plug? If the noise persists, the
interference enters the radio via the power supply or via direct
radiation into the radio. (The latter can be established by moving the
box closer or further away from the radio and see if it makes a
difference). If the noise disappears when you disconnect the antenna it
proves that the noise enters via the antenna (or antenna wire).
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402809#402809
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: 912UL operating temperature |
Richard,
The only possible problem a seriously cool running engine could create
would be water condensation in the oil. This manifests itself as a white
emulsified scum deposited on the insides of the rocker-boxes and in the
oil tank. Left un-corrected, this could cause bearing and piston wear. I
would not think this would cause a modern plug to whisker.
The wrong heat-range plug could in extremis. They should all look
whitish to light brown. Check that you are using the correct plugs and
if "yes", then I suspect that your problem is related to carburetion.
A rich mixture will cause the engine to run cool and the plugs to soot
up and misfire occasionally -- exactly the symptoms you describe. A
number of things could cause this.
If you have always suffered from sooty plugs, it could be that your
needles are set too high. If you regularly operate in a hot or high
terrain, the lower density air will cause the mixture to go over-rich.
The constant velocity carburettors will naturally compensate for this to
some degree, but the coarse adjustment is made by the needle position.
You might need to drop the needles one notch (Check your Rotax manual if
you are unsure how to do this).
Are all the plugs black or just those on one side of the engine?
If the problem only affects the plugs on one side, then you could have a
problem with the carburettor on that side.Remove the float bowl and
check for:
Floats not punctured
Float height set correctly (arm should be parallel with base of carb)
Needles seating properly and Viton tip not damaged
No detritus on needle seat.
Gasket sealing properly (look for signs of leaking -- light brown fuel
deposits around the gasket line)
If the symptoms have only recently started and all the plugs are
"sooty", then you may need to look at the air filter. Check that it is
not dirty or wet.
Also check that the float bowl vent pipes are not blocked and both
connect to the airbox plenum, the float bowl needs to operate at the
same pressure as the "filter" side of the carburettor and if it become
blocked or disconnected, the differential pressure will cause the
mixture to change.
Bit of a long answer, but the secret is to analyse how the problem began
and use a process of elimination to point to the cause.
Lastly, if you do need to get hold of some Bing carburettor spares, let
me know and I will put you in touch with an authorised Bing dealership
that sells spares at sensible prices -- not the kings ransom that Rotax
charge.
Nigel
On 16/06/2013 13:40, Richard Lamprey wrote:
>
> Greetings to all from Kenya.
>
> Does anyone know what is the minimum cylinder head (coolant) temperature for
normal operations? The manual gives maximum but no minimum, save for warming
up to above 50C for takeoff power. I was told recently that cylinder head temp
should not be too much below Oil temp, but not sure about this.
>
> Some years ago I had new radiators made by Docking Engineering of Silverstone,
after a leak in the Europa ones. They have proved so efficient that I cannot
get the temp much above 105C after prolonged climb, and it settles to 80-90C
in the cruise, against an oil temp of 105C. I put blanking strips on them to
get the temp a bit higher, to 95C, but took these off to test recently, and down
the temp went. The plugs are fouling up with carbon more now (with the odd
missed beat), which according to the manual is caused by running too cool.
But I cant find that optimum operating temperature stated anywhere. Any ideas
appreciated.
>
> A very simple Europa... 912UL, warp-drive fixed pitch.
> Best
> Richard
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=402782#402782
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|