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Walter, Sorry Walter but I’m missing the Shadetree reference; what reunion and who is Pat? On the other matter, thank you for setting me straight. Perhaps I’m not nearly as smart as I like to believe. Oh yeah, who is Janet? Danny Miller N 38° 43' 25.7" W 77° 30' 38.6" From: Walter Atkinson [mailto:walter@advancedpilot.com]
Sent: Monday, August 22, 2011 10:10 AM
To: lml@lancaironline.net
Subject: Danny--How do I run lean of peak? Danny: How's things at Shadetree? If you are thinking that the ROI is about fuel savings you have missed the point. While that is nice and adds up over time the real return is on what you learn about your engine , its operation, and its maintenance. For example, the stuff on engine monitors could easily save you the tuition cost in one flight, save the engine or you and Janet's butts. <g> The section on detonation and preignition, how to recognize them and what to do about them is not about fuel saving... it's about life saving. While the APS class is known as the "LOP School", that is only about 5% of the course. (We teach optimal mixture management whether ROP or LOP.) (BTW, forwarded your email about the reunion to Pat) On Aug 21, 2011, at 12:09 PM, Danny Miller wrote:
I’m not convinced of the ROI for spending $995 on this course in my particular case. As an example, for my LNC2 with an IO-360, if I burn 9 gph running ROP and 8.5 gph running LOP (best case scenario), how long does it take to recover the expense? To keep it simple, let’s say I spend $6/gal. So, that’s $995 x gal/$6 / 0.5gph = 331.7 hrs, or about 3 years of flying. So, the question becomes, is it worth all the hub bub? Again, for me, I think not. For you guys with the high burn rates, maybe so. But what is your actual hourly saving and is it worth the additional stress on your engines for the potentially much lower TBO? You decide and your mileage may vary. From: Steve Colwell [mailto:mcmess1919@yahoo.com]
Sent: Thursday, August 18, 2011 12:40 PM
To: lml@lancaironline.net
Subject: How do I run lean of peak? Claudette and I attended the Advanced Pilot Course a couple of years ago. Of the 50 or so attendees, (and there were skeptics,) I don’t think anyone left without agreement their procedures are the best way to operate an engine. The presentation is easy to follow with complete explanation of what is happening and why. Any remaining questions are answered and everything is documented. The cost of the course should be easily amortized by fuel savings and reduced maintenance. They even provide very comfortable swivel chairs. Steve Colwell Legacy IO-550
Subject: [LML] How do I run lean of peak?
If you operate your engine ROP at high power settings you have a much greater chance of damaging your engine than by anything you might do LOP. The next Live APS class is October 7-9. |
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