Today's Message Index:
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1. 03:02 AM - Re: L-29 Engine start problems (John Cabrera)
2. 04:56 PM - Re: L-29 Engine start problems (franknlynn)
Message 1
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| Subject: | Re: L-29 Engine start problems |
Just a thought but have you tried to connect a different start control box to see
if it behaves the same way?
Dynamo switch is for the generator. Don't remember what the other ones do. They
are cut off switches for the systems they are connected to. I leave them alone
during annuals. Haven't found a reason to use them.
There is a circuit breaker located in right wing. If it is triped your generator
will not come on line and your start cycle will not happen. You access it thru
the panel that has the voltage regular attached to it. It is at the lower
part of the right wing root. You have to reach aft thru the access panel in
the wing and find the button. You have to press hard to reset it. I doubt
that is the sole cause of the problem but could be contributing to the problem.
I hope you find the problem. I hate electrical problems.
John Cabrera
On Jul 10, 2011, at 4:53 PM, BasilAir Warbirds wrote:
>
> Hi All I am in the process of re assembling and making operational a L29 Delfin
which was imported from the US. I am on the east coast of Australia and
this is my first time exposure to the L29, and with the limited maintenance data
available it has been a steep learning curve. We are getting to the business
end of the project but have struck a problem when we came to dry spin and then
start the Walter M-701 engine. The problem started as not being able to engage
the starter motor or power the ignitor plugs etc etc. I found that when the
start was initiated with the starter button in the front cockpit (205 KS located
left front desk) the sequencing cam drive electric motor in the LUN 2273
start control box would only run while the start button in the cockpit was depressed.
Normally after initiating the start by depressing the start button for
three seconds the sequence cam drive motor should continue to progress through
the start sequence and then stop at the start positi!
> on ready for the next start but what is happening with our aircraft is as soon
as the start button is released the sequence cam drive motor stops driving and
the start sequence ends.
>
> Also with the electrical cable to the start motor disconnected from the LUN 2273
start control box, the sequence cam drive motor can be run through its full
start cycle by holding the start button in the cockpit depressed although it
will not stop at the start position, it will just continue to run whilst the
start button is depressed. If the electrical cable to the starter is reconnected
to the LUN 2273 start control box and the sequence cam drive motor is run through
its cycle by holding the starter button depressed, the over current circuit
breaker A18 on the sub distribution board( R/H rear circuit board-front cockpit)
trips when the sequence arrives at the position that power is applied
to the starter motor.
>
> What is the purpose and effect on systems that the control box located at the
top left side of the engine and has three switches mounted in it that are marked
Panel-Pozar-Dynamo. It appears they may be used for maintenance operations
but I cannot find description or information on these switches.
>
> I am in possession of maintenance data downloaded from L29.org and at this stage
these are my main reference on maintenance and system and operation procedures
but I find the content limited. Example in the document labelled Operation
and Attendance manual which has listed a section STARTING OF ENGINE,CIRCUIT
B, the main location and schematic diagrams figures 21 & 22 are missing. Is there
anywhere I can obtain more detailed information on this aircraft and its
systems and operation from a maintenance perspective.
>
> If anyone can offer solutions to these problems I would be most appreciative.
Regards Bruce Allan Cessnock Australia email coasties@ozemail.com.au
>
> --------
> BasilAir Warbirds Warnervale Australia
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=345823#345823
>
>
>
>
>
>
>
>
>
>
Message 2
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| Subject: | Re: L-29 Engine start problems |
Tim,
Can I help by supplying any parts from my aircraft?
Regards,
Frank
----- Original Message -----
From: "John Cabrera" <propblast@earthlink.net>
Sent: Monday, July 18, 2011 8:00 PM
Subject: Re: L29-List: L-29 Engine start problems
>
> Just a thought but have you tried to connect a different start control box
> to see if it behaves the same way?
> Dynamo switch is for the generator. Don't remember what the other ones
> do. They are cut off switches for the systems they are connected to. I
> leave them alone during annuals. Haven't found a reason to use them.
> There is a circuit breaker located in right wing. If it is triped your
> generator will not come on line and your start cycle will not happen. You
> access it thru the panel that has the voltage regular attached to it. It
> is at the lower part of the right wing root. You have to reach aft thru
> the access panel in the wing and find the button. You have to press hard
> to reset it. I doubt that is the sole cause of the problem but could be
> contributing to the problem.
> I hope you find the problem. I hate electrical problems.
>
> John Cabrera
>
> On Jul 10, 2011, at 4:53 PM, BasilAir Warbirds wrote:
>
>> <coasties@ozemail.com.au>
>>
>> Hi All I am in the process of re assembling and making operational a
>> L29 Delfin which was imported from the US. I am on the east coast of
>> Australia and this is my first time exposure to the L29, and with the
>> limited maintenance data available it has been a steep learning curve. We
>> are getting to the business end of the project but have struck a problem
>> when we came to dry spin and then start the Walter M-701 engine. The
>> problem started as not being able to engage the starter motor or power
>> the ignitor plugs etc etc. I found that when the start was initiated with
>> the starter button in the front cockpit (205 KS located left front desk)
>> the sequencing cam drive electric motor in the LUN 2273 start control box
>> would only run while the start button in the cockpit was depressed.
>> Normally after initiating the start by depressing the start button for
>> three seconds the sequence cam drive motor should continue to progress
>> through the start sequence and then stop at the start posi!
> ti!
>> on ready for the next start but what is happening with our aircraft is as
>> soon as the start button is released the sequence cam drive motor stops
>> driving and the start sequence ends.
>>
>> Also with the electrical cable to the start motor disconnected from the
>> LUN 2273 start control box, the sequence cam drive motor can be run
>> through its full start cycle by holding the start button in the cockpit
>> depressed although it will not stop at the start position, it will just
>> continue to run whilst the start button is depressed. If the electrical
>> cable to the starter is reconnected to the LUN 2273 start control box and
>> the sequence cam drive motor is run through its cycle by holding the
>> starter button depressed, the over current circuit breaker A18 on the sub
>> distribution board( R/H rear circuit board-front cockpit) trips when the
>> sequence arrives at the position that power is applied to the starter
>> motor.
>>
>> What is the purpose and effect on systems that the control box located at
>> the top left side of the engine and has three switches mounted in it that
>> are marked Panel-Pozar-Dynamo. It appears they may be used for
>> maintenance operations but I cannot find description or information on
>> these switches.
>>
>> I am in possession of maintenance data downloaded from L29.org and at
>> this stage these are my main reference on maintenance and system and
>> operation procedures but I find the content limited. Example in the
>> document labelled Operation and Attendance manual which has listed a
>> section STARTING OF ENGINE,CIRCUIT B, the main location and schematic
>> diagrams figures 21 & 22 are missing. Is there anywhere I can obtain more
>> detailed information on this aircraft and its systems and operation from
>> a maintenance perspective.
>>
>> If anyone can offer solutions to these problems I would be most
>> appreciative. Regards Bruce Allan Cessnock Australia email
>> coasties@ozemail.com.au
>>
>> --------
>> BasilAir Warbirds Warnervale Australia
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=345823#345823
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
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