Hailstone damaged plane

Ninjinsky · August 10th, 2015, 06:26 AM

http://www.thedenverchannel.com/news...ugh-hail-storm
This made the news and indeed the damage is staggering. What is puzzling me is how the engines survived this? We know that bird ingestion is a major problem with jet engines yet they survived the baseball sized hailstones that trashed the nose of the plane.
Any aviation enthusiasts here shed any light?

Racer x · August 10th, 2015, 06:58 AM

My money is on the engine are trash. But kept working. I love jet engines

DEFY · August 10th, 2015, 07:37 AM

They may have to replace the outer turbine fans. These things are made up of a multitude of fans before the combustion chamber. Either way it's going to be a pricey repair.

Motofool · August 10th, 2015, 08:31 AM

Large aircraft are certified to be able to keep flying after impacting a 4-pound bird.

Rifleman · August 10th, 2015, 12:45 PM

just, wow. I wouldn't call that windshield damage, I'd call that destruction.

how the crap did they land the plane? You can't SEE!!!!

only one that tops that is the pilot that landed with the front gear not fully deployed (down and locked)

Link to original page on YouTube.

Alchemist · August 13th, 2015, 11:15 AM

Quote:

Originally Posted by Rifleman

just, wow. I wouldn't call that windshield damage, I'd call that destruction.

how the crap did they land the plane? You can't SEE!!!!

only one that tops that is the pilot that landed with the front gear not fully deployed (down and locked)

Link to original page on YouTube.

How about trying it with only one wing?

https://m.youtube.com/watch?v=M359poNjvVA

Alchemist · August 13th, 2015, 11:20 AM

Quote:

Originally Posted by Ninjinsky

http://www.thedenverchannel.com/news...ugh-hail-storm
This made the news and indeed the damage is staggering. What is puzzling me is how the engines survived this? We know that bird ingestion is a major problem with jet engines yet they survived the baseball sized hailstones that trashed the nose of the plane.
Any aviation enthusiasts here shed any light?

I would imagine any ingested hail was quickly reduced in size due to high temps inside the engine compressor stages. As DEFY noted, they would have to pass through the outer compressors intact, but by the time they got inside, may already have been water vapor/steam. (Not healthy but not catastrophic)

crimsondragon · August 13th, 2015, 07:29 PM

Damage to the compressor blades would most likely be limited to nicks and dent. The hail, although big, do not have a large enough mass to affect the blades. No damage to the turbine section should be found. Engines are designed to be able to ingest high volumes of water with no effect. It came out the back as a sort of fog/mist/vapor.

The biggest costs incurred would be the windshields, weather radar, nose radome, and the sheet metal inspections and/or repairs required throughout the whole aircraft. If you factor in everything, sheet metal is the highest costs. The RVSM (Reduced Vertical Separation Minimum) section of the fuselage, which is right next to and below the windshields, will be thoroughly inspected. The mechanic' labor involved, the required paperwork and documentation, the engineers' labor and time to cut an EC/RA (Engineering Change/Request Authorization) to approve a non-standardized repair, and the actual repair carried out, followed by an inspector to verify the work is done in accordance with the EC/RA. Structural repairs are RII (Required Inspection Items). There are also many other unforeseeable expenses that I can only imagine. Maybe a couple of antennas, damages in the cockpit, pitot tubes, some landing and/or taxi lights, etc etc.

August 10th, 2015, 06:26 AM	#1
Ninjinsky ninjette.org certified postwhore Name: Paul Location: UK Join Date: Apr 2014 Motorcycle(s): Ninja 250, Yamaha RS200 (classic) Posts: A lot.	Hailstone damaged plane http://www.thedenverchannel.com/news...ugh-hail-storm This made the news and indeed the damage is staggering. What is puzzling me is how the engines survived this? We know that bird ingestion is a major problem with jet engines yet they survived the baseball sized hailstones that trashed the nose of the plane. Any aviation enthusiasts here shed any light?

August 10th, 2015, 06:58 AM	#2
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	My money is on the engine are trash. But kept working. I love jet engines __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

August 10th, 2015, 07:37 AM	#3
DEFY ᗧ•••ᗣ•ᗣᗣ•••ᗣ Name: Nick Location: NY Join Date: Nov 2013 Motorcycle(s): 2009 Ninja 250R and 2014 Triumph 675R Posts: A lot.	They may have to replace the outer turbine fans. These things are made up of a multitude of fans before the combustion chamber. Either way it's going to be a pricey repair. __________________________________________________ Spoiler for topic: It might just be the [you] tag

August 10th, 2015, 08:31 AM	#4
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Large aircraft are certified to be able to keep flying after impacting a 4-pound bird. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

August 10th, 2015, 12:45 PM	#5
Rifleman Old and slow Name: Lohman Location: Aiken, S.C. Join Date: May 2014 Motorcycle(s): Suzuki TL1000R, Honda CBR600F3, Ninja 250 Posts: 889	just, wow. I wouldn't call that windshield damage, I'd call that destruction. how the crap did they land the plane? You can't SEE!!!! only one that tops that is the pilot that landed with the front gear not fully deployed (down and locked) Link to original page on YouTube. __________________________________________________

August 13th, 2015, 07:29 PM	#8
crimsondragon ninjette.org member Name: Tim Location: NJ Join Date: Sep 2013 Motorcycle(s): 2006 Ninja 250 Posts: 47	Damage to the compressor blades would most likely be limited to nicks and dent. The hail, although big, do not have a large enough mass to affect the blades. No damage to the turbine section should be found. Engines are designed to be able to ingest high volumes of water with no effect. It came out the back as a sort of fog/mist/vapor. The biggest costs incurred would be the windshields, weather radar, nose radome, and the sheet metal inspections and/or repairs required throughout the whole aircraft. If you factor in everything, sheet metal is the highest costs. The RVSM (Reduced Vertical Separation Minimum) section of the fuselage, which is right next to and below the windshields, will be thoroughly inspected. The mechanic' labor involved, the required paperwork and documentation, the engineers' labor and time to cut an EC/RA (Engineering Change/Request Authorization) to approve a non-standardized repair, and the actual repair carried out, followed by an inspector to verify the work is done in accordance with the EC/RA. Structural repairs are RII (Required Inspection Items). There are also many other unforeseeable expenses that I can only imagine. Maybe a couple of antennas, damages in the cockpit, pitot tubes, some landing and/or taxi lights, etc etc.

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