Today's Message Index:
----------------------
1. 08:12 AM - Re: Lycoming Engine School (Bill Watson)
2. 01:18 PM - Re: PCU 5000 able to command low rpm (<1700rpm)? (Carl Froehlich)
3. 04:03 PM - Re: PCU 5000 able to command low rpm (<1700rpm)? (Tim Lewis)
Message 1
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| Subject: | Re: Lycoming Engine School |
That is a new instructor.
On 9/20/2016 10:36 AM, Carlos Trigo wrote:
>
> The instructor who appears in the website information is Mr. Michael
> Damiani, being it in the 2016 or the 2017 courses.
>
> Carlos
>
> *De:*owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] *Em nome de *Bill Watson
> *Enviada:* Tuesday, September 20, 2016 3:10 PM
> *Para:* rv10-list@matronics.com
> *Assunto:* Re: RV10-List: Lycoming Engine School (was PCU 5000 able to
> command low rpm)
>
> Yes, I think so, but with a big but....
>
> I recently got a mailing from Lycoming that indicated the long time
> instructor of the 2 'engine school' classes was going to retire after
> his last class. I attended the school back in 2013 and I'm not sure
> when his last class is scheduled (sometime in 2016 I believe).
>
> I forget the gentleman's name but he has been synonymous with the
> 'engine school' classes for a long time. He is a great instructor
> with a long and varied career at Lycoming that makes him a unique
> resource. I'd highly recommend the school with him instructing. I'd
> want a review of the 'new' classes before attending them without him.
>
> In some previous life I spent some time teaching and was steeped in
> pedagogical practice which makes me an instant critic of any
> educational event. This guy initially struck me as a knowledgeable
> old timer who was going to share war stories for 8 days; inject me
> with caffiene, stat! It took me a half day to realize he was a very
> experienced instructor who had the course content fully integrated
> into a folksy delivery style complete with hands on lab work and
> exactly the documentation and notes one needed to go home with.
> Barely a wasted word or motion. And he was deep in specific Lycoming
> operation and service details.
>
> Looking back at my confirmation letter from 2013, the classes were
> part of Penn College ($1,425 for both together). The first was called
> 'Service School' and one walked out with manuals, service documents,
> and the ability to use them to service Lycoming engines. That is
> prerequisite to the 2nd class 'Dissembly/Reassembly' which is a guided
> lab where you do the deed.
>
> I highly recommend the classes for any builder unless you already have
> a certificate, independent of how much service you intend to inflict
> on your IO-540. I envision that after he leaves, the classes will
> retain the same format, structure and value. The quality of
> instruction is the only question.
>
> Bill
> On 9/20/2016 8:14 AM, Carlos Trigo wrote:
>
> Bill
>
> You mentioned Lycoming engine School, does that still exist?
>
> Regards
>
> Carlos wishing to learn all about Lycoming engines Trigo
>
> *De:*owner-rv10-list-server@matronics.com
> <mailto:owner-rv10-list-server@matronics.com>
> [mailto:owner-rv10-list-server@matronics.com] *Em nome de *Bill Watson
> *Enviada:* Tuesday, September 20, 2016 12:19 PM
> *Para:* rv10-list@matronics.com <mailto:rv10-list@matronics.com>
> *Assunto:* Re: RV10-List: PCU 5000 able to command low rpm (<1700rpm)?
>
> On a similar note, I avoid running at or below 1000 rpm to avoid
> lead fouling, which I am led to believe can happen even when fully
> leaned.
>
> While attending Lycoming Engine School, I followed up with the
> instructor after his lead fouling discussion and came away with
> the understanding that lead build-up will occur anytime combustion
> chamber temperatures drop below a certain point. He emphasized
> that it happens very quickly based on some testing he was familiar
> with. He mentioned that that the practice of pulling the power
> off at touchdown and leaving it there during the rollout is enough
> to form visible deposits. By the same token, heating things up
> above the critical temperature soon after will cause most, but not
> all of those new deposits to quickly evaporate away.
>
> This write-up from Shell
> <http://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/techart-18-30071600.html>
> seems to support that thinking.
>
> As a result of the same thinking, I've never practiced engine out
> descents with the power pulled all the way and the prop slowed
> anywhere near 1000 rpm.
>
> This former fixed pitch jockey handles the prop cycling task by
> setting the power around 1500 rpms before cycling the prop.
> During the cycle, the rpm drop just hits 1000 rpms as I move the
> control forward. And I try to not to imitate what I've seen some
> CFIs do by slamming the prop control this way and that. On my
> engine a slower steady hand will do.
>
> I've never been told that it's hard on the prop and don't believe
> it is. I have been told that I'm both checking function and
> forcing some warm oil thru the controller so that it performs as
> expected during takeoff. Now I'm thinking the main task is just
> to make sure it works without spraying oil all over the place but
> honestly just don't really know. I just do it.
>
> Bill "glider guider at heart that has learned to love that big
> 'ol 540" Watson
> N215TG
>
> On 9/19/2016 10:26 PM, Carl Froehlich wrote:
>
>
>
> I don't recall how far it will pull down the RPM - I only pull the prop
>
> until a get a slight drop to make sure the governor is functioning.
I was
>
> told (correctly or incorrectly) deep run up cycles are hard on props.
>
>
>
>
>
>
> Thanks, Carl.
>
>
>
> I want to make sure I understand your reply correctly. I do my runups
at
>
> 1800. If I pull the prop control back during runup, the MT governor/prop
>
> will slow the engine way down -- probably below 1000 rpm.
>
> Certainly well below 1700 rpm. Are you telling me that with the
PCU
>
> 5000, if pull the prop control all the way back (at runup, for example),
>
> your experience is the PCU5000 won't slow the engine below 1700 rpm?
>
>
>
> Thanks very much for your insights. I appreciate it.
>
>
>
> Tim Lewis
>
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Message 2
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| Subject: | Re: PCU 5000 able to command low rpm (<1700rpm)? |
Well shoot fire Tim, on today's hop I did not remember what you asked. This is
what I did it if helps. At the end of the 1800 RPM run up I pulled the prop
all the way out. The governor brought RPM down to below 1100 RPM.
Should do another hop Friday so I'll do your test then.
Carl
> On Sep 19, 2016, at 10:45 PM, Tim Lewis <TimRVator@comcast.net> wrote:
>
>
> Carl,
>
> I was told the same.
>
> If you get a chance, perhaps you can test this: At 1000 rpm idle, can you pull
the prop control and see if the prop governor will further slow the engine
rpm. If so, that's the info I'm looking for.
>
> VR
>
> Tim
>
> --
> Tim Lewis -- HEF (Manassas, VA)
> A&P
> RV-6A N47TD -- 1104 hrs - sold
> RV-10 N31TD -- 740 hrs
>
> Carl Froehlich wrote on 9/19/2016 10:26 PM:
>>
>> I don't recall how far it will pull down the RPM - I only pull the prop
>> until a get a slight drop to make sure the governor is functioning. I was
>> told (correctly or incorrectly) deep run up cycles are hard on props.
>>
>> Carl
>>
>> -----Original Message-----
>> From: owner-rv10-list-server@matronics.com
>> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Lewis
>> Sent: Monday, September 19, 2016 9:53 PM
>> To: rv10-list@matronics.com
>> Subject: Re: RV10-List: PCU 5000 able to command low rpm (<1700rpm)?
>>
>>
>> Thanks, Carl.
>>
>> I want to make sure I understand your reply correctly. I do my runups at
>> 1800. If I pull the prop control back during runup, the MT governor/prop
>> will slow the engine way down -- probably below 1000 rpm.
>> Certainly well below 1700 rpm. Are you telling me that with the PCU
>> 5000, if pull the prop control all the way back (at runup, for example),
>> your experience is the PCU5000 won't slow the engine below 1700 rpm?
>>
>> Thanks very much for your insights. I appreciate it.
>>
>> Tim Lewis
>
>
>
>
>
Message 3
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| Subject: | Re: PCU 5000 able to command low rpm (<1700rpm)? |
Thanks, Carl. The data point you took today is very helpful to my . I
appreciate it.
--
Tim Lewis -- HEF (Manassas, VA)
A&P
RV-6A N47TD -- 1104 hrs - sold
RV-10 N31TD -- 740 hrs
Carl Froehlich wrote on 9/21/2016 4:14 PM:
>
> Well shoot fire Tim, on today's hop I did not remember what you asked. This
is what I did it if helps. At the end of the 1800 RPM run up I pulled the prop
all the way out. The governor brought RPM down to below 1100 RPM.
>
> Should do another hop Friday so I'll do your test then.
>
> Carl
>
>> On Sep 19, 2016, at 10:45 PM, Tim Lewis <TimRVator@comcast.net> wrote:
>>
>>
>> Carl,
>>
>> I was told the same.
>>
>> If you get a chance, perhaps you can test this: At 1000 rpm idle, can you pull
the prop control and see if the prop governor will further slow the engine
rpm. If so, that's the info I'm looking for.
>>
>> VR
>>
>> Tim
>>
>> --
>> Tim Lewis -- HEF (Manassas, VA)
>> A&P
>> RV-6A N47TD -- 1104 hrs - sold
>> RV-10 N31TD -- 740 hrs
>>
>> Carl Froehlich wrote on 9/19/2016 10:26 PM:
>>>
>>> I don't recall how far it will pull down the RPM - I only pull the prop
>>> until a get a slight drop to make sure the governor is functioning. I was
>>> told (correctly or incorrectly) deep run up cycles are hard on props.
>>>
>>> Carl
>>>
>>> -----Original Message-----
>>> From: owner-rv10-list-server@matronics.com
>>> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Lewis
>>> Sent: Monday, September 19, 2016 9:53 PM
>>> To: rv10-list@matronics.com
>>> Subject: Re: RV10-List: PCU 5000 able to command low rpm (<1700rpm)?
>>>
>>>
>>> Thanks, Carl.
>>>
>>> I want to make sure I understand your reply correctly. I do my runups at
>>> 1800. If I pull the prop control back during runup, the MT governor/prop
>>> will slow the engine way down -- probably below 1000 rpm.
>>> Certainly well below 1700 rpm. Are you telling me that with the PCU
>>> 5000, if pull the prop control all the way back (at runup, for example),
>>> your experience is the PCU5000 won't slow the engine below 1700 rpm?
>>>
>>> Thanks very much for your insights. I appreciate it.
>>>
>>> Tim Lewis
>>
>>
>>
>>
>
>
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