Today's Message Index:
----------------------
1. 01:23 AM - Re: #3 cylinder miss. (PHILLIPS I)
2. 05:08 AM - Re: #3 cylinder miss. (Thom Riddle)
3. 06:46 AM - Re: single intake manifold for 912 (ronlee)
4. 09:50 AM - Re: #3 cylinder miss. (Ron Hoyt)
5. 09:58 AM - Re: #3 cylinder miss. (Ron Hoyt)
6. 10:33 AM - Re: single intake manifold for 912 (europapa)
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: | Re: #3 cylinder miss. |
The Obvious question Ron was it really missing? did you get a vibration
and drop in performance? If not, Then check out the EGT probes and
wiring and earthing points,
If possible swap the EGT over with another cylinder to see if it swap's
sides,
regards
Ivor
On 31 October 2011 02:20, Ron Hoyt <rrh@rrhoyt.com> wrote:
>
> I am looking for ideas as to what might cause the following:
>
> On the first flight after about 1/2 hr the #3 cylinder exhaust temp went
> to approximately 250 degrees. All other cylinders showed the normal temp of
> about 1200 degrees. This occurred when the RPM was reduced to the low 4000
> range and continued down into the 3000 range. During the final to the
> runway the engine was idled and the cold exhaust returned to normal.
>
> After landing the engine was given a MAG test and both MAGs worked
> normally At 3500 rpm.
>
> The plugs were pulled and all looked normal, Grayish white porcelain, dry
> and no soot.
>
> I believe the ignition is a wasted spark which means that I should have
> more than 1 cylinder show the failure if it was the ignition system.
>
> Could it be a sticky valve?
>
> Any other ideas?
>
> Thanks for any feedback
> Ron Hoyt
> N232S
>
>
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: #3 cylinder miss. |
Assuming you are talking about a 912 engine, 1200F is not normal for normal
cruise rpms. That is low. 912 EGTs are normally in the 1400-1450 range at
5000rpm or higher, unless you are flying at very high density altitudes, in
which case they could be down in the low to mid 1300 range.
Thom in Buffalo
On Mon, Oct 31, 2011 at 4:20 AM, PHILLIPS I <ivor.phillips@ntlworld.com>wrote:
> The Obvious question Ron was it really missing? did you get a vibration
> and drop in performance? If not, Then check out the EGT probes and
> wiring and earthing points,
> If possible swap the EGT over with another cylinder to see if it swap's
> sides,
>
> regards
> Ivor
>
>
> On 31 October 2011 02:20, Ron Hoyt <rrh@rrhoyt.com> wrote:
>
>>
>> I am looking for ideas as to what might cause the following:
>>
>> On the first flight after about 1/2 hr the #3 cylinder exhaust temp went
>> to approximately 250 degrees. All other cylinders showed the normal temp of
>> about 1200 degrees. This occurred when the RPM was reduced to the low 4000
>> range and continued down into the 3000 range. During the final to the
>> runway the engine was idled and the cold exhaust returned to normal.
>>
>> After landing the engine was given a MAG test and both MAGs worked
>> normally At 3500 rpm.
>>
>> The plugs were pulled and all looked normal, Grayish white porcelain, dry
>> and no soot.
>>
>> I believe the ignition is a wasted spark which means that I should have
>> more than 1 cylinder show the failure if it was the ignition system.
>>
>> Could it be a sticky valve?
>>
>> Any other ideas?
>>
>> Thanks for any feedback
>> Ron Hoyt
>> N232S
>>
>> ====**==============================**=
>> -List" target="_blank">http://www.matronics.com/**
>> Navigator?RotaxEngines-List
>> ====**==============================**=
>> http://forums.matronics.com
>> ====**==============================**=
>> le, List Admin.
>> ="_blank">http://www.matronics.com/**contribution
>> ====**==============================**=
>>
>>
>>
>>
> *
>
> *
>
>
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: single intake manifold for 912 |
I am with you on that one. One may loose a bit of power with only one carb but
make life easier. As for fuel injection that is another concern. I had a Hirth
with fuel injection that ran well until I lost my charging system. To make a
long story short I did make it back to the airport, but only because the voltage
didn't drop below 10.4 volts as that is where the injection computer stops
working. Thank goodness for a flashing light on my EIS I knew the charging system
quit .
--------
Ron Lee
Tucson, Arizona
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=356416#356416
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: #3 cylinder miss. |
Yes the engine vibration increased. The drop in performance was masked
by the throttle reduction
I'll check the probes anyway. Thanks
Ron
On 10/31/2011 2:20 AM, PHILLIPS I wrote:
> The Obvious question Ron was it really missing? did you get a vibration
> and drop in performance? If not, Then check out the EGT probes and
> wiring and earthing points,
> If possible swap the EGT over with another cylinder to see if it swap's
> sides,
>
> regards
> Ivor
>
>
> On 31 October 2011 02:20, Ron Hoyt<rrh@rrhoyt.com> wrote:
>
>> --> RotaxEngines-List message posted by: Ron Hoyt<rrh@rrhoyt.com>
>>
>> I am looking for ideas as to what might cause the following:
>>
>> On the first flight after about 1/2 hr the #3 cylinder exhaust temp went
>> to approximately 250 degrees. All other cylinders showed the normal temp of
>> about 1200 degrees. This occurred when the RPM was reduced to the low 4000
>> range and continued down into the 3000 range. During the final to the
>> runway the engine was idled and the cold exhaust returned to normal.
>>
>> After landing the engine was given a MAG test and both MAGs worked
>> normally At 3500 rpm.
>>
>> The plugs were pulled and all looked normal, Grayish white porcelain, dry
>> and no soot.
>>
>> I believe the ignition is a wasted spark which means that I should have
>> more than 1 cylinder show the failure if it was the ignition system.
>>
>> Could it be a sticky valve?
>>
>> Any other ideas?
>>
>> Thanks for any feedback
>> Ron Hoyt
>> N232S
>>
>>
>>
>>
>>
>
Message 5
| 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: #3 cylinder miss. |
You are correct, the egt was in the high 1400, just below 1500 and the
OAT was 33 deg. at 3800 ft where the engine was operating fine. The
plugs indicate the engine was slightly on the lean side of combustion.
Thanks
Ron
On 10/31/2011 6:05 AM, Thom Riddle wrote:
> Assuming you are talking about a 912 engine, 1200F is not normal for normal
> cruise rpms. That is low. 912 EGTs are normally in the 1400-1450 range at
> 5000rpm or higher, unless you are flying at very high density altitudes, in
> which case they could be down in the low to mid 1300 range.
>
> Thom in Buffalo
>
> On Mon, Oct 31, 2011 at 4:20 AM, PHILLIPS I<ivor.phillips@ntlworld.com>wrote:
>
>> The Obvious question Ron was it really missing? did you get a vibration
>> and drop in performance? If not, Then check out the EGT probes and
>> wiring and earthing points,
>> If possible swap the EGT over with another cylinder to see if it swap's
>> sides,
>>
>> regards
>> Ivor
>>
>>
>>
>> On 31 October 2011 02:20, Ron Hoyt<rrh@rrhoyt.com> wrote:
>>
>>> --> RotaxEngines-List message posted by: Ron Hoyt<rrh@rrhoyt.com>
>>>
>>> I am looking for ideas as to what might cause the following:
>>>
>>> On the first flight after about 1/2 hr the #3 cylinder exhaust temp went
>>> to approximately 250 degrees. All other cylinders showed the normal temp of
>>> about 1200 degrees. This occurred when the RPM was reduced to the low 4000
>>> range and continued down into the 3000 range. During the final to the
>>> runway the engine was idled and the cold exhaust returned to normal.
>>>
>>> After landing the engine was given a MAG test and both MAGs worked
>>> normally At 3500 rpm.
>>>
>>> The plugs were pulled and all looked normal, Grayish white porcelain, dry
>>> and no soot.
>>>
>>> I believe the ignition is a wasted spark which means that I should have
>>> more than 1 cylinder show the failure if it was the ignition system.
>>>
>>> Could it be a sticky valve?
>>>
>>> Any other ideas?
>>>
>>> Thanks for any feedback
>>> Ron Hoyt
>>> N232S
>>>
>>> ====**==============================**=
>>> -List" target="_blank">http://www.matronics.com/**
>>> Navigator?RotaxEngines-List
>>> ====**==============================**=
>>> http://forums.matronics.com
>>> ====**==============================**=
>>> le, List Admin.
>>> ="_blank">http://www.matronics.com/**contribution
>>> ====**==============================**=
>>>
>>>
>>>
>>>
>> *
>>
>> *
>>
>>
>
Message 6
| 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: single intake manifold for 912 |
Hi Ron,
thank you for your reply.
So many modifications have been developed for the Rotax 912 by people that would
like to make it better but I cant find a single publishment of the idea I had.
May be it is something wrong with it.
The Rotec TBI doesn't need electricity, so give me an intake spider and Ill try
it.
I just kicked my vacuum pump and now there would be space.
Regards Juergen
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=356433#356433
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! --
|