My dad was an airline mechanic (mostly engines) during the DC-7/Super Connie turbo compound days. His opinion was that the turbo jets saved the airlines, despite their initial costs. They couldn't meet the advertised cross continent times and keep the recip engines together.One quick clarification: FAA's policy is: if there is technology available to meet the reliability numbers in AC 23.1309, the reliability numbers are a requirement; if there is NO technology to meet those numbers, then the maximum that can be achieved is acceptable. Obviously piston engine technology does not allow an engine which, as a unit, meets the 10^5 criteria. Therefore the attainable piston engine reliability today - 1 failure in 10000-13000 hours - is acceptable. But the idea is to do whatever possible to meet those numbers. That AC is common sense. As for turboprops and turbofans, that is a whole different ball game. P&W PT6 reliability average is around 1 IFSD in 330000 hours, and big turbofans such as the GE90 (Boeing 777) are 1 IFSD in more than half a million hours. Interesting to remember that, 65 years ago, turbo compound radial engines (such as in the DC-7 and in the Super Constellation) could barely meet 1 failure in 1000 hours!
Definitely, it could be very unpleasant for the proponent/seller. But highly informative for everyone else. Readers who are seriously considering an engine purchase are generally smart enough to sift through the vitriol and personality "issues" to make their own judgement about the validity of any criticisms.Doesn't take more than a single person with a chip on their shoulder (deserved or undeserved) to make such participation very unpleasant.
That's not unique to Facebook. The mods here, for example, do delete postings that they feel violate the standards for the HBA forum. I manage a mailing list where I can also delete messages that don't meet the standards, and even not allow people to post unless their messages are compliant. It ain't Facebook's fault.That is the trouble with facebook.The truth can be covered up by admins.
It was the Turbine both Turbo Jets & Turbo Prop, I remember the schedule problems with the piston powered Convairs, when theywet to turbo prop schedue problems went way down.My dad was an airline mechanic (mostly engines) during the DC-7/Super Connie turbo compound days. His opinion was that the turbo jets saved the airlines, despite their initial costs. They couldn't meet the advertised cross continent times and keep the recip engines together.
In my own experience I've worked on many airliners with well over 100000 hours and 130000+ cycles.
I caught Alissa claiming the BD-4 had a fiberglass landing gear, after I proved it was aluminum by providing a copy of the BOM the whole thread disappeared. That told me a lot about the "new Eggenfelner"That is the trouble with facebook.The truth can be covered up by admins.
Certainly true for politics. I used to own a political forum, and there were always claims of biased moderation, from both sides....I submit that it is virtually impossible to be unbiased when 'moderating' discussions involving
politicsactually, virtually *anything*...
Very true. A business attitude towards a customer which received bad service/product speaks volumes about its honesty and integrity.Definitely, it could be very unpleasant for the proponent/seller. But highly informative for everyone else. Readers who are seriously considering an engine purchase are generally smart enough to sift through the vitriol and personality "issues" to make their own judgement about the validity of any criticisms.
In my experience, it is possible to learn a lot about a business from its critics and its customers (all of them). More importantly, seeing how the business responds to valid criticism, right out there in the open, is very illuminating.
Yes, prospective buyers should go there. It is clear that John Austin has his hands full, especially as Zenith has an interest in maintaining good relationships with various engine suppliers. See how Jan and Allissa barge into the threads started by Aeromomentum builders on the Aeromomentum portion of the forum in order to insert marketing for Viking. Shameful.NON-BIASED REVIEWS --
Zenith has separate, dedicated forum sections for eight different engine choices.
The entire Zenith forum is moderated by John Austin, who has no affiliation with the Zenith Factory or any of the engine suppliers.
The engine forum sections are open to the suppliers but are fully independent from and in no way controlled by these engine suppliers.