---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Wed 09/21/16: 3 ---------------------------------------------------------- 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 _____________________________________ Time: 08:12:17 AM PST US Subject: Re: RV10-List: Lycoming Engine School From: Bill Watson 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] *Em nome de *Bill Watson > *Enviada:* Tuesday, September 20, 2016 12:19 PM > *Para:* 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 > > 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 > > ------------------------------------------------------------------------ > > Imagem removida pelo remetente. Avast logo > > > > > This email has been checked for viruses by Avast antivirus software. > www.avast.com > > > > ------------------------------------------------------------------------ > > Imagem removida pelo remetente. Avast logo > > > > > This email has been checked for viruses by Avast antivirus software. > www.avast.com > > > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus /9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRof Hh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwh MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAAR CABkAGQDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAA AgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkK FhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWG h4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl 5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREA AgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYk NOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOE hYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk 5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD3+iiigAooooAKKKKACiiigAooooAKKKKA CiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAoo ooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKA CiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAoo ooAKKKKACiiigD//2Q= ________________________________ Message 2 _____________________________________ Time: 01:18:37 PM PST US From: Carl Froehlich Subject: Re: RV10-List: 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 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 _____________________________________ Time: 04:03:14 PM PST US Subject: Re: RV10-List: PCU 5000 able to command low rpm (<1700rpm)? From: Tim Lewis 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 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 >> >> >> >> > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv10-list Browse Digests http://www.matronics.com/digest/rv10-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.