Maximum G rating in an F

[crxcte]

Anyone know the maximum G rating in a F model?  Tested or documented?

Thanks

[Shadrach]

The wing has been tested to +11 and -6 IIRC... Why, did you manage to bend it???

 

[Parker_Woodruff]

Well, the certified limits are in your POH...

Mooney has tested an M20 wing to something like 9 Gs and broken the test stand, however.  That also says nothing about the horizontal stabilizer and other components of the airplane that could be compromised with excess Gs. (Seat rails, empenage, etc.)

[Immelman]

It is probably +3.8G; I think this information should be the limitations of your AFM. The 'vintage' Mooney 'owners manual' seems to lack this stuf, whereas the standardized POH format for later model years (certainly for the J and later) will have it. I don't have "F" manuals in front of me, though.

There are a *lot* of things that could go wrong if you start talking about exceeding that. Have you taken a look at how the engine mounts are bolted to the airframe? Imagine the engine and prop, running and vibrating away, already on a long lever arm, under increased G-load. Yikes.

[fantom]

Don't do whatever you're thinking about doing!!!

[Shadrach]

Quote: Immelman

It is probably +3.8G; I think this information should be the limitations of your AFM. The 'vintage' Mooney 'owners manual' seems to lack this stuf, whereas the standardized POH format for later model years (certainly for the J and later) will have it. I don't have "F" manuals in front of me, though.

There are a *lot* of things that could go wrong if you start talking about exceeding that. Have you taken a look at how the engine mounts are bolted to the airframe? Imagine the engine and prop, running and vibrating away, already on a long lever arm, under increased G-load. Yikes.

[Shadrach]

http://www.mooneyevents.com/wingld.htm

For what it's worth...

"Mooney engineers adopted the design in the early 1960's, when construction moved away from wood wings. Later the factory engineers broke a static-test fixture at 9.3 Gs while trying a destructive test."

[crxcte]

Ross,  yes tested, I have been told the wing is built off a beam that spans from one side to the other.  I have never heard of a Mooney coming apart during flight so I assume the real tested stress rating is up there.  I've been studying my commerical flight maneuvers and some take on some stress. 

[rbridges]

Quote: crxcte

Ross,  yes tested, I have been told the wing is built off a beam that spans from one side to the other.  I have never heard of a Mooney coming apart during flight so I assume the real tested stress rating is up there.  I've been studying my commerical flight maneuvers and some take on some stress. 

[sreid]

None of the commercial manuevers require more than +2g's.  Steep turns at 60 degrees are +2g, you will have to demonstrate them at 55 degrees.

[crxcte]

Quote: sreid

None of the commercial manuevers require more than +2g's.  Steep turns at 60 degrees are +2g, you will have to demonstrate them at 55 degrees.

[Shadrach]

Quote: crxcte

Ross,  yes tested, I have been told the wing is built off a beam that spans from one side to the other.  I have never heard of a Mooney coming apart during flight so I assume the real tested stress rating is up there.  I've been studying my commerical flight maneuvers and some take on some stress. 

[MARZ]

Quote: Shadrach

http://www.mooneyevents.com/wingld.htm

For waht it's worth...

"Mooney engineers adopted the design in the early 1960's, when construction moved away from wood wings. Later the factory engineers broke a static-test fixture at 9.3 Gs while trying a destructive test."

[Shadrach]

[kerry]

Quote: Shadrach

Metal wing inflight break-ups could probably be counted on one hand.  I do recall reading about an M20K that flew through a thunder storm and landed with buckled sheet metal. IIRC, the Mooney engineers that inspected the aircraft estimated that it had sustained G loads in excess of 13Gs. 

[Shadrach]

Quote: kerry

Metal wing inflight break-ups could probably be counted on one hand.  I do recall reading about an M20K that flew through a thunder storm and landed with buckled sheet metal. IIRC, the Mooney engineers that inspected the aircraft estimated that it had sustained G loads in excess of 13Gs. 

[jetdriven]

here are a few inflight overstress and breakup accidents.  It does happen.

 

http://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=20050926X01531&ntsbno=DEN05LA139&akey=1

http://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20001211X10119&key=1

http://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20001212X17457&key=1

http://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20060731X01061&key=1