Airplane Porn (and the occasional helicopter)

[J-Luis]

Another pic of fixed landing gear... but on sub-sonic aircraft. 

Blohm and Voss BV-38 Luftwaffe flying wing in Egypt intended to transport the Ark of the Covenant to Germany. 

However, the mission failed due to the intervention of a guy by the name of Jones. 

[J-Luis]

One more unique delta wing... Helwan HA-300 designed for Spain... built then cancelled in Egypt... by Willy Messerschmitt.

[KELMO]

An Osprey, pretty close to the house, and pretty close to the ground. About 1000 feet Above Ground Level.

Crappy pic but had to grab my phone and run out of the shop after I heard it.

[Jesse C.]

[flyerdan]

A while back I saw a flight of Ospreys go over (4 or 5).  They were pretty high, but they have a distinctive sound.  I don't recall ever having seen one before.

[MikeRL411]

On 12/23/2022 at 4:30 PM, flyerdan said:

Fixed gear on a >mach planform?  The limeys had some strange design ideas.

 

Did you note the airplane I D ? It's an X plane and not intended to be a serviceable production unit.

[angliagt]

4 hours ago, flyerdan said:

A while back I saw a flight of Ospreys go over (4 or 5).  They were pretty high, but they have a distinctive sound.  I don't recall ever having seen one before.

 

               They do have an unusual sound.I heard loud noises,& then saw 

TWO of them flying by.I think they were on their way to Norfolk.

[KELMO]

9 hours ago, angliagt said:

 

               They do have an unusual sound.I heard loud noises,& then saw 

TWO of them flying by.I think they were on their way to Norfolk.

They sound like a heavy helicopter, which we also get flying by at fairly low altitude.  Had 3 helicopters fly directly over the house a couple of days ago at a fairly low altitude.

[KELMO]

Another Opsrey note; the other night I heard the "heavy helicopter" sound again. I rolled outside and it was passing over the house and I didn't have my phone.

The tips of the rotors were illuminated in green.

 

Went to the National Museum of Nuclear Science and History over the weekend with Missus Kelmo.

 

Pretty sure we'll be going back.

Like when the weather is a little warmer.

 

[Jesse C.]

[Jesse C.]

[angliagt]

13 hours ago, Jesse C. said:

For some reason "In-Flight Simulator" sounds funny to me -

shouldn't it be "In-Flight Training"? 

  

[Jesse C.]

[Cardinal Grammeter]

Having worked for Pratt & Whitney doing structural and modal analysis of compressor and turbine blades, it gives me the heebeegeebees when ancient jet engines are operated where there is no documentation.  Rotor speed operating ranges are critical to avoid blade resonances which are catastrophic if not.  (One might think it would be safer to run the engine at lower speeds but that couldn't be farther from the truth.)  Then there are the inspection intervals and what to look for looking for.   

[J-Luis]

I think this is the same P-59. 

[paradime]

I would imagine Anselm Franz, and Frank Whittle wore out a few slid rules and had many catastrophic failures before the US Army Air Corps wrapped a P59 around a J31‑GE‑5 turbojet.  

[datzenmike]

All engineering advances are not from rigorous calculations from books of tables and formulas. It's basically trial and error. If it crashes you figure out what it was and fix it. If it works, you use that information on the next plane. There isn't a building, plane, train, car or boat today that doesn't have a history of disaster in it's past that didn't lead to a better understanding of engineering principals.

 

 

[Cardinal Grammeter]

20 years ago when I worked at P&W, blade attachments were evolved epically.  At the time FEM analysis tools like NASTRAN and ANSYS were incapable of modeling firtrees.  And even if bearing stresses were known, there was no existing criteria.  I assume they are now able to model them appropriately with contact elements and are correlating bearing stresses with know wear patterns that have been documented for older designs.  

 

Boundary conditions have always been a challenge as well as plasticity in stress concentrations.  Goodman Diagrams back then did not account for plasticity.  A guy name Juvinal had worked out a simple way to do that and we were just starting to consider such methods to eliminate unnecessary conservatism.

 

Just writing these few sentences has aggravated my head injury from my June 2021 head breaking windshield totally of my 87 Turbo Sprint, the most fun car I ever owned.

[MikeRL411]

22 hours ago, J-Luis said:

I think this is the same P-59. 

 

Two different planes.  Lack of cannon and anti drag fitting below tail.

[MikeRL411]

On 3/4/2023 at 6:30 PM, datzenmike said:

All engineering advances are not from rigorous calculations from books of tables and formulas. It's basically trial and error. If it crashes you figure out what it was and fix it. If it works, you use that information on the next plane. There isn't a building, plane, train, car or boat today that doesn't have a history of disaster in it's past that didn't lead to a better understanding of engineering principals.

 

 

 

Physists calculate,Enginers make it work!

[ratpatrol66]

 

[J-Luis]

Bf 110's from long ago. 

 

[J-Luis]

Black Knight debris or...? 

[J-Luis]

The Wind Rises, anime loosely based on the life of Jiro Horikoshi, the man who designed the Mitsubishi A6M Zero fighter plane. 

 

[SWFL]

On 3/5/2023 at 12:05 AM, Cardinal Grammeter said:

20 years ago when I worked at P&W, blade attachments were evolved epically.  At the time FEM analysis tools like NASTRAN and ANSYS were incapable of modeling firtrees.  And even if bearing stresses were known, there was no existing criteria.  I assume they are now able to model them appropriately with contact elements and are correlating bearing stresses with know wear patterns that have been documented for older designs.  

 

Boundary conditions have always been a challenge as well as plasticity in stress concentrations.  Goodman Diagrams back then did not account for plasticity.  A guy name Juvinal had worked out a simple way to do that and we were just starting to consider such methods to eliminate unnecessary conservatism.

 

Just writing these few sentences has aggravated my head injury from my June 2021 head breaking windshield totally of my 87 Turbo Sprint, the most fun car I ever owned.

 

United Airlines Flight 232