Poeple pushing the lop line really are only going of the aps course and indoctrination of that. When they dont even know that difference between flame front speeds between rich and lean and push push push the wrong answer proven wrong will not addmit they were wrong and then delete a complete thread to cover their tracks.
When a person cant even tell the difference between a radial and a opposed engine. Wow he flys a io520 so that makes him an expert on the whole engine in the aviation fleet.
They say 75% rop is the same as 75% lop how so how much harder is the lop engine working to maintain that power.
They continue to claim lower exhaust temperatures but dont understand that the lower power settings that they are achieving is mainly because all the energy is is not used due to the slower burn rate of the lean mixture. So now energy is lost because its exiting past the exhaust valve. This is why you have burnt valves. This is why you have exhaust leakage on a leak rate test. This is why we check it iaw ad eng 4 and why both major manufacturers say you must do tnis check with zero leakage. To get around this the cult say this is not required and dismiss it. Totally agaist the AD.
Real world environment has shown and proven not only to myself but ask just about lame the same question what the results are from extreme leaning. Thier answer it not your fault its what you all been learnt from trade school etc and manuals. Wtf you think we all dumb sheep. We see feel smell whats going on we can make or own decessions and assessment on maintenance.
Fact is the leaner the mixture the slower tbe flame front burn rate is. With this the mixture is still emiting energy to the exhaust valve on opening where as in a richer mixture the energy is wholly consumed in the chamber, and even though it my be hotter it is NOT burning the valve because its engry is already been consumed.
They say running rop you will damage your engine and running lop ypu will not. Nothing could be further from the truth. 99% off engines in GA in aust do not run lop. So were are all these damaged engines then.
Go ask any lame that looked after a late model plastic fantastic with an io550 in it with lean assit and ask them what they have found over the years.
The other state they mention is it was proven by the airlines running the large radials running lop how they extended there engine o/h life from the millitary version. Wtf . Really. Not.
This is a play on words. Commercial avaition could never operate on millitary o/h periods. The P&w 985/ 1340 for example had an millitary o/h life by memerory of approx 300 hours, ( wil try and locate the 1st issue book i have on it to confrim) now its up to 1200 hours in cilivian life. Millitary have a zero expence rule where commercial well we have to pay so we make things last.
For the most part aps plays on words dyno testing is not reworld testing and never will be.
Cavite emptor i think it is let the byer be were.