Pulling by the Prop

[jetdriven]

deleted

[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?

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[maniago]

Quote: jetdriven

Or is this another bullshit wives tale?

[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?

[scottfromiowa]

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?

[maniago]

Quote: scottfromiowa

 Naw, it was the last gasp of this pathetic thread...

[mooneym20d]

They pulled on the prop :-)

[gregwatts]

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?

[PTK]

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

[Sabremech]

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. 

[Cruiser]

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?

[Shadrach]

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?

[John Pleisse]

Quote: jetdriven

 

[John Pleisse]

Quote: jetdriven

the counterweights are set on pins which might be detuned from a prop strike, but from pulling the endplay from the crank?

[maniago]

Quote: N4352H

 This can happend applying power too quickly, overspeeding or other....not just a prop strike.

[aviatoreb]

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

[MARZ]

WOW is this thread REALLY STILL GOING

[jetdriven]

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.

[mooneym20d]

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.

[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?

 

[mooneym20d]

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?

 

[Shadrach]

This whole thread could be called a "good tug"...

[scottfromiowa]

Speaking words of wisdom...Let it be....Let it be.

[PTK]

Quote: jetdriven

Don't you give it a "good tug" when preflighting it?

[PTK]

Quote: mooneym20d