jetdriven Posted February 5, 2012 Report Posted February 5, 2012 Again, have any of these produced any evidence that moving a Mooney M20 by the prop caused ONE SINGLE PROBLEM INN 56 YEARS, or do I just still smell manure. Given millions of M20 flight hours, I think "Res Ipsa Loquitor" applies here. So, recap, can anyone find data? edit Quote
maniago Posted February 5, 2012 Report Posted February 5, 2012 Quote: jetdriven Or is this another bullshit wives tale? Quote
HopePilot Posted February 5, 2012 Report Posted February 5, 2012 I was pushing the plane back yesterday (tow bar and hand on cowl), and heard a gurgling sound. I had just flown and the plane was hot. Was that oil? Quote
scottfromiowa Posted February 5, 2012 Report Posted February 5, 2012 Quote: HopePilot I was pushing the plane back yesterday (tow bar and hand on cowl), and heard a gurgling sound. I had just flown and the plane was hot. Was that oil? Quote
maniago Posted February 5, 2012 Report Posted February 5, 2012 Quote: scottfromiowa Naw, it was the last gasp of this pathetic thread... Quote
gregwatts Posted February 5, 2012 Report Posted February 5, 2012 Quote: HopePilot I was pushing the plane back yesterday (tow bar and hand on cowl), and heard a gurgling sound. I had just flown and the plane was hot. Was that oil? Quote
PTK Posted February 5, 2012 Report Posted February 5, 2012 Quote: jetdriven Again, have any of these produced any evidence that moving a Mooney M20 by the prop caused ONE SINGLE PROBLEM INN 56 YEARS, or do I just still smell manure. Given millions of M20 flight hours, I think "Res Ipsa Loquitor" applies here. So, recap, can anyone find data? edit Quote
Sabremech Posted February 5, 2012 Report Posted February 5, 2012 I think you just wrote the best post so far PK. You do it your way and let the rest of us do it our way. Quote
Cruiser Posted February 5, 2012 Report Posted February 5, 2012 Quote: HopePilot I was pushing the plane back yesterday (tow bar and hand on cowl), and heard a gurgling sound. I had just flown and the plane was hot. Was that oil? Quote
Shadrach Posted February 6, 2012 Report Posted February 6, 2012 Quote: HopePilot I was pushing the plane back yesterday (tow bar and hand on cowl), and heard a gurgling sound. I had just flown and the plane was hot. Was that oil? Quote
John Pleisse Posted February 6, 2012 Report Posted February 6, 2012 Quote: jetdriven the counterweights are set on pins which might be detuned from a prop strike, but from pulling the endplay from the crank? Quote
maniago Posted February 6, 2012 Report Posted February 6, 2012 Quote: N4352H This can happend applying power too quickly, overspeeding or other....not just a prop strike. Quote
aviatoreb Posted February 7, 2012 Report Posted February 7, 2012 Quote: JimR I am also curious about how many licks it takes to get to the center of a Tootsie Roll lolly pop, and if anyone has ever actually found a leprechaun with a pot of gold at the end of a rainbow. Jim Quote
MARZ Posted February 7, 2012 Report Posted February 7, 2012 WOW is this thread REALLY STILL GOING Quote
jetdriven Posted February 7, 2012 Report Posted February 7, 2012 Nobody can produce any data or a single incident showing that pulling your plane out of its spot by the prop is bad, but "it says right here" from some obscure document with no suporting data. Plenty of noise, but as they say "show me the data". Your POH says to increase mixture to FULL RICH before making any power change, and cruising with a CHT at 465 dF is "normal". The rest of us will continue with established practice as is has been working since the wright brothers. Quote
mooneym20d Posted February 7, 2012 Report Posted February 7, 2012 Quote: DaV8or Great link. Thanks for sharing. Everybody should check this thing out. Lots of good info with pictures and diagrams. It should be noted for this discussion that the FAA too says not to push or pull the aircraft by the propeller. It does not however state a reason why, nor does it include any detailed physics annalysis. My personal opinion (and it is just my opinion, no physics degree or laboratory testing) is that moving the plane by the ends of the blades, or by the spinner is bad for the prop. Rather than get into potential liability issue by illustrating where it is and isn't OK to push/pull, they just say hands off altogether. In addition, there is also the potential for inadvertant engine start, so again, just easier to say hands off. However, having said all that, I completely understand the position of following the propeller manufacturer's, FAA and AOPA's advice. Not pushing and pulling on the prop can't hurt the prop in any way. Pushing and pulling on the cowling...? Me not so much. For myself, I will continue when not using my power tug, to push/pull with one hand on the tow bar and the other on the prop root. It's a risk and I accept it. Quote
jetdriven Posted February 7, 2012 Report Posted February 7, 2012 if pushing your prop causes the blades to unseat then perhaps your prop wasnt airworthy to begin with. Don't you give it a "good tug" when preflighting it? Quote
mooneym20d Posted February 7, 2012 Report Posted February 7, 2012 Quote: jetdriven if pushing your prop causes the blades to unseat then perhaps your prop wasnt airworthy to begin with. Don't you give it a "good tug" when preflighting it? Quote
Shadrach Posted February 7, 2012 Report Posted February 7, 2012 This whole thread could be called a "good tug"... Quote
scottfromiowa Posted February 7, 2012 Report Posted February 7, 2012 Speaking words of wisdom...Let it be....Let it be. Quote
PTK Posted February 7, 2012 Report Posted February 7, 2012 Quote: jetdriven Don't you give it a "good tug" when preflighting it? Quote
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