Today's Message Index:
----------------------
1. 07:48 AM - Rotax Owner videos not working (Paul Kuntz)
2. 08:23 AM - 912uls cooling (AJR)
3. 08:58 AM - Re: AeroElectric-List: Re: Rotax 912 UL alternator drop-out (Paul Kuntz)
4. 09:49 AM - Re: 912uls cooling (andrew cullum)
5. 09:49 AM - Re: 912uls cooling (andrew cullum)
6. 10:23 AM - Re: Rotax 912ULS Stumble below 4000 RPM on final ONLY** (rampil)
7. 11:08 AM - Re: Rotax Owner videos not working (Robert Borger)
8. 11:52 AM - Re: Rotax Owner videos not working (Paul Kuntz)
9. 12:12 PM - Pausing on Compression. (andrew cullum)
10. 05:46 PM - Re: Rotax Owner videos not working (Roger Lee)
11. 06:04 PM - Re: 912uls cooling (Roger Lee)
Message 1
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| Subject: | Rotax Owner videos not working |
I haven't been able to view Rotax Owner videos in the last two days. For
instance, this one generates a web page with a black window where the video
should appear, but then it just sits there:
http://www.rotax-owner.com/all-videos/expanded-video-instructions/39-exp-si-27-010
Anyone else having this problem?
Paul Kuntz
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Hi Guys
I have a zenair ch701 which has a 912uls engine..I recently put this
aircraft on
full lotus floats and it gets off and flies good however it seems that
the oil temperature
is going higher then normal,,I sometimes see the temperature a 230 and
more after take off
It has the air scoop for the oil cooler on the passenger side and I
widened the scoop for more air
The guide says 190 to 230 is the most favourable operating
temperatures.
I consider it to be high as I usually see temps in the 200 =93210
area..also when I check the
oil and follow the test of rotating the propeller and listening for the
gurgle in the header tank
I do not hear it..I am using the mobile MX 4T racing oil as suggested...
what is the oil filter
part number and which is the best suggested replacement filter to
use..what does the group
consider normal temperatures for the 912ULS engine
all advice and suggestions would be appreciated
Happy flying
AJ Rose
Message 3
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| Subject: | Re: AeroElectric-List: Re: Rotax 912 UL alternator |
drop-out
Several inputs suggested checking the connections on the leads coming from
the alternator, and checking the system ground connections. I checked the
faston-type alternator lead connections, which were clean and tight. I
checked all of the ground connections, which were also tight. Yesterday I
went up for a test flight and confirmed the symptoms under varying system
loads. The normal system voltage with alternator on line is 13.8 volts,
which is consistent with what others are reporting for the Rotax Ducati
regulator. I see a max load of 10 amps with everything running, so I am
satisfied that the total load is well within the standard Rotax system
capacity. I also observed that the system voltage drops to 13.5 volts at
the 10 amp max load, which seems abnormal. Under this max load, the
alternator dropped out after a few minutes, indicated by system voltage
dropping to around 12.5 volts -- consistent with fully charged lead-acid
battery.
When I reduced the load to 3 amps, which is my practical minimum (one Dynon
display, radio and transponder), the alternator came back and stayed there,
with system voltage at the normal regulator set point of 13.8 volts.
I repeated this experiment a few times for various loads, finding that a
total load above 5 or 6 amps will cause the alternator to drop out after a
few minutes, and that it will come back when the load is reduced to 3
amps.
I am pretty well convinced that my voltage regulator is bad. I did learn
from comments on this issue that Van's includes a voltage regulator cooling
kit with its lighting kit for the RV-12, consisting of a length of plastic
tubing that connects from the air intake duct to a shroud over the
regulator, providing a direct blast of cooling air to counteract the
increased electrical load of the lighting. So there is certainly
indication that the Ducati regulator is susceptible to overheating under
load. The RV-12 regulator is on the engine side of the firewall, however,
and mine is on the cabin side. At 10 amps with the regulator mounted in
the cockpit environment, I'm thinking the regulator should be able to
handle the load without supplemental cooling. Others have noted the
not-so-good reputation of the Ducati regulator, but there are thousands of
them in service on Rotax engines worldwide, so rather than tackle a
reconfiguration of my regulator and wiring installation at this point , I
ordered a replacement Ducati from Lockwood Aviation and will see how it
goes. I also ordered a overvoltage protection module from B&C, since the
Pipistrel electrical system does not include one. I'll install it with the
new voltage regulator.
I'll report my findings after installing the new regulator.
Paul Kuntz
On Sat, Aug 10, 2013 at 10:21 PM, Paul Kuntz <paul.r.kuntz@gmail.com> wrote:
> Thanks for the tips, everyone. I concur with Bob that my Ducati regulator
> is done for and should be replaced. I will take a look at the
> Schicke unit that Peter mentioned.
>
> Cheers,
> Paul Kuntz
>
>
> On Friday, August 9, 2013, Robert L. Nuckolls, III wrote:
>
>> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <
>> nuckolls.bob@aeroelectric.com>
>>
>> At 12:55 PM 8/9/2013, you wrote:
>>
>>> Thanks for the tip. I'll check this cooling shroud idea. I'm also
>>> wondering if my regulator has already been compromised. Any opinions on
>>> what my repeated fail/recover situation indicates? I would guess that it
>>> cycled between failed and recovered 8 or 10 times before we established a
>>> state where it stayed on line, limited to a total current draw of 3 amps.
>>>
>>
>> If your regulator can't carry 10A without cooling, it's
>> probably broke. A functional part should be capable of
>> rated output for the alternator which is on the order
>> of 18A. I've not heard of any mass-movements to forced
>> air cool these regulators.
>>
>>
>>
>>
>> Bob . . .
>>
>>
>>
>>
>>
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| Subject: | Re: 912uls cooling |
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| Subject: | Re: 912uls cooling |
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Message 6
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| Subject: | Re: Rotax 912ULS Stumble below 4000 RPM on final ONLY** |
Here's another thought.
I have a similar issue in my 912s, at manifold pressures from 22 down to
18 inHg, the engine gets rough. If I advance the prop to more FINE, the rough range
narrows. This would speak for overloading the engine or lugging, not under
loading as initially suggested.
Over the years I've have several conversations with Phil Lockwood, Dean Vogel,
Bud Yearly and others. The most likely, but still unproven in my case, is Bud's
thought that in-flight one of the carb slides sticks. Bud has seen
a carb replacement cure the issue.
I may try it myself when I fly down to Sebring for my ten year maintenance.
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=406972#406972
Message 7
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| Subject: | Re: Rotax Owner videos not working |
Paul,
First chance to test and, sure enough, just a black screen where the
video is supposed to be.
There's a "Contact Us" at the bottom of the page. I suggest you send
them a note as I just did.
Bob Borger,
Europa XS Tri, Rotax 914, Airmaster C/S prop.
On Aug 18, 2013, at 9:48 AM, Paul Kuntz <paul.r.kuntz@gmail.com> wrote:
> I haven't been able to view Rotax Owner videos in the last two days.
For instance, this one generates a web page with a black window where
the video should appear, but then it just sits there:
http://www.rotax-owner.com/all-videos/expanded-video-instructions/39-exp-s
i-27-010
>
> Anyone else having this problem?
>
> Paul Kuntz
Message 8
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| Subject: | Re: Rotax Owner videos not working |
Thanks for the confirmation, Bob. I did send them a note.
Paul
On Sun, Aug 18, 2013 at 11:08 AM, Robert Borger <rlborger@mac.com> wrote:
> Paul,
>
> First chance to test and, sure enough, just a black screen where the video
> is supposed to be.
>
> There's a "Contact Us" at the bottom of the page. I suggest you send them
> a note as I just did.
>
> Bob Borger,
> Europa XS Tri, Rotax 914, Airmaster C/S prop.
>
> On Aug 18, 2013, at 9:48 AM, Paul Kuntz <paul.r.kuntz@gmail.com> wrote:
>
> I haven't been able to view Rotax Owner videos in the last two days. For
> instance, this one generates a web page with a black window where the video
> should appear, but then it just sits there:
> http://www.rotax-owner.com/all-videos/expanded-video-instructions/39-exp-si-27-010
>
> Anyone else having this problem?
>
> Paul Kuntz
>
> *
>
> *
>
>
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| Subject: | Pausing on Compression. |
Hi AJ,
Sorry I must have mis-read some script.
Pausing on compressions just makes it
Easier,when all the oil has been pumped out of the crankcase up to the tank,the
gurgle is heard,with air now being drawn through.
Best regards
Andy Cullum.
Sent from my iPhone
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| Subject: | Re: Rotax Owner videos not working |
It will most likely get fixed tomorrow.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=407002#407002
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| Subject: | Re: 912uls cooling |
Since you just put your plane on floats make sure your prop pitch is setup for
the extra drag. You may want to set your prop pitch to achieve at least 5600 -5800
rpm at WOT flat and level. Adding the drag will automatically increase the
oil temp. No big deal as 230F isn't an issue. If you fly in the Southwest US
230F is an everyday norm during the hot months. Up to 240F doesn't bother me,
but mine seems to be good at around 230F - 235F in climb and around 220F for
cruise (OAT 95-100F). My prop can achieve 5600-5650 rpm WOT flat and level.
Use the correct oil filter. Rotax Part #825-012. Many years ago the difference
from an automotive filter to a Rotax was negligible, but not when they came out
with the latest oil filter. The automotive filter by pass pressure is only 12-15
psi and years ago the Rotax was 13-16 psi. Now days the Rotax by pass pressure
is 18-22 psi, the filter has a check valve in it not found in an automotive
filter and a much softer better designed anti drain back membrane. It still
has a paper element, but there are now significant difference so stay with Rotax.
Of course there are those that say I have had an automotive filter on for
a while. This is like smoking cigarettes. One cigarette or even one pack won't
kill you or cause a disease, but a life time is deadly and causes debilitating
diseases.
You own an expensive engine and an expensive one to repair treat it right and don't
cause yourself any avoidable long term headaches and wallet strains.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=407004#407004
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