- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Winter Olympics
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
re: Carley McCord plane crash report reveals propeller problem
Posted on 9/16/21 at 5:09 pm to jamboybarry
Posted on 9/16/21 at 5:09 pm to jamboybarry
quote:
Weird say to say the engines failed
The engine absolutely could have been fine. Planes like that (multi engine turboprop) can rotate their propeller blades around the blade's long axis to adjust their pitch and maximize their efficiency by properly matching their "bite" on the air to the air properties and engine speed. It also allows for a propeller to help compensate if its engine fails by moving into a position where it minimizes the drag it creates and avoids spinning the engine further due to the slipstream spinning the propeller. It's very similar to how you can turn the blade of an oar to be more or less perpendicular to the direction you're paddling to change how much it pushes against the water when you paddle.
If the mechanism that adjusts the propeller's pitch fails, the blades can rotate into a position where even though the engine is spinning them, they're not able to bite into the air, so they provide no thrust. They can also fail into a position where they generate so much drag that the balance of the plane is disrupted. Multi-engine planes should be capable of flying with an engine out, but that imbalance due to the failed prop can affect the plane's stability. Even if the thrust is sufficient to keep the plane flying, the pilot will need to compensate for any imbalances that occur if that propeller mechanism fails. If the failure occurs very close to the ground or at low speeds (say, right after takeoff), a propeller failure may put the plane into a situation that the pilot can't correct before stalling into the ground or hitting something.
This post was edited on 9/16/21 at 5:30 pm
0
Posted on 9/16/21 at 5:21 pm to Tigeralum2008
LINK
Actual NTSB accident report.
Analysis of post crash prop pitch mechanism and controls are contain within the the group chairman’s 52 page factual report.
Actual NTSB accident report.
Analysis of post crash prop pitch mechanism and controls are contain within the the group chairman’s 52 page factual report.
This post was edited on 9/16/21 at 5:26 pm
Posted on 9/16/21 at 5:43 pm to Tigeralum2008
Damn, that's tragic
Posted on 9/16/21 at 6:04 pm to Scottforeverlsu
quote:
Also on board were my good friends Vaughn and Wade.
RIP Vaughn
Vaughn was a high school classmate of mine, along with Wade’s father.
Posted on 9/16/21 at 6:13 pm to Tigeralum2008
updated the op. Sorry.
No need to be sorry, didnt mean to be a dick or anything. Topic just brought the memories back. All good.
Tragic accident and horrible day
No need to be sorry, didnt mean to be a dick or anything. Topic just brought the memories back. All good.
Tragic accident and horrible day
Posted on 9/16/21 at 7:06 pm to LongueCarabine
It’s still so haunting that first responders were able to get there pretty quickly yet couldn’t save any of them aside from the one male passenger who was ejected.
Posted on 9/16/21 at 7:38 pm to GreatLakesTiger24
Being mean to insurance is a no no here
Posted on 9/16/21 at 7:46 pm to ForeverEllisHugh
Pretty sure the passenger wasn’t ejected
Posted on 9/16/21 at 8:11 pm to Quatre Pot
I didn’t mean ejected as in the piloting term, just thrown several feet from the wreckage.
Posted on 9/16/21 at 8:34 pm to ForeverEllisHugh
Not meaning to give you a hard time so don’t take it that way. This point may not even matter to anybody else here.
He wasn’t thrown from the wreckage. He was in a seat in part of the wreckage
He wasn’t thrown from the wreckage. He was in a seat in part of the wreckage
Posted on 9/16/21 at 9:47 pm to Tigeralum2008
It reads like someone not familiar with aviation is trying to write an article they knew nothing about. It references articles from 2020. The FAA will publish a final accident report with a cause/probable cause, and that’s what matters. My guess is an engine failed after take off, and an unfeathered prop after an engine failure caused a ton of drag along with pilot error causing the crash. We’ll see
This post was edited on 9/16/21 at 10:10 pm
Posted on 9/16/21 at 10:44 pm to redstick13
“It could cause the propellers to loose efficiency no matter the RPM”
Agreed. But could it be so tilted out of whack as to cause catastrophic “drag”?
Seems unlikely. As Many prop planes can fly with only one engine.
Agreed. But could it be so tilted out of whack as to cause catastrophic “drag”?
Seems unlikely. As Many prop planes can fly with only one engine.
Posted on 9/16/21 at 10:53 pm to Lee Beauregard
quote:
Agreed. But could it be so tilted out of whack as to cause catastrophic “drag”?
I only know what I've read on the subject but my understanding is that if the props were in a high pitch, or even worse, reverse pitch configuration, then they would provide insufficient thrust. Reading through the NTSB crash report it sounds as if the prop pitch was in a low pitch configuration and prop RPM was 2,000. Both of those settings would have been correct for a take off.
Posted on 9/16/21 at 11:07 pm to Lee Beauregard
quote:
Seems unlikely. As Many prop planes can fly with only one engine.
Losing a engine on a twin engine plane requires the pilot to quickly and correctly perform a number of tasks to enable the plane to continue remaining airborne with one engine. Losing an engine during take off with a heavy load leaves very little margin for error when executing engine out procedures. Until the prop on the dead engine is “feathered” it will cause substantial drag that could easily set in motion events that result in a crash. The second engine is there because the plane needs it to fly properly, not as a spare.
Posted on 9/16/21 at 11:15 pm to redstick13
quote:
That plane almost certainly had variable pitch propellers. If there was a problem with the propeller pitch it could cause the propellers to lose efficiency no matter what the blade RPM was.
Cheyennes have full-feathering props. There could have been a loss of oil pressure in the prop governor gear pump. Extremely rare case though.
Posted on 9/16/21 at 11:31 pm to Reservoir dawg
I’m interested in what the survivor has to say he witnessed
Regardless of his understanding of principles of aviation, he had to be able to shed some light on the situation that could only help in translating what the flight recorder is saying
Regardless of his understanding of principles of aviation, he had to be able to shed some light on the situation that could only help in translating what the flight recorder is saying
This post was edited on 9/16/21 at 11:32 pm
Posted on 9/16/21 at 11:39 pm to jamboybarry
quote:
Weird say to say the engines failed
Agreed. It's like saying the Titanic sank because it was heavier than the water.
Posted on 9/17/21 at 12:04 am to bountyhunter
quote:
Agreed. It's like saying the Titanic sank because it was heavier than the water.
Wait. That's NOTHING alike.
Posted on 9/17/21 at 12:35 am to wahoocs
quote:
I’m interested in what the survivor has to say he witnessed
Regardless of his understanding of principles of aviation, he had to be able to shed some light on the situation that could only help in translating what the flight recorder is saying
Surviving passenger’s statement from NTSB accident report witness summary.
“An LPD Sergeant at the accident site briefly spoke with the surviving passenger. The passenger identified the owner of the airplane and pilot by name. He stated that there were six people onboard the airplane and they departed from LFT and were en route to Atlanta, Georgia for a football game. The passenger stated that all he remembered was “that the plane went straight up and then straight down and he did not know what happened.”
This post was edited on 9/17/21 at 12:38 am
Posted on 9/17/21 at 1:17 am to EA6B
I spent several hours today combing through all the reports, pictures, and accident file. Amazing how these experts can take small tiny charred / burned parts, sometimes filled with soot, and reconstruct damn near exact details of the flight. Since that plane doesn’t have a “black box” , it’s imperative for NTSB investigators on the ground to search the entire debris field and find every part possible. Here’s a pic of the engine and propeller gauge instrument panel. The right engine torque gauge is missing. It was never found and may still be somewhere in the field, or possibly picked up by a first responder on site. That missing gauge can provide exact, valuable information to confirm the cause of accident
Here is the flight path with exact time and elevation. 40 seconds into the flight the plane achieved its highest altitude, approximately 923 feet. Appears the pilot realized there was a problem as the engines were not achieving full RPM’s and begins to descend at 45 seconds into the flight. He makes a hard left turn crossing over Verot School Rd. twice before clipping telephone wires, trees, and crashing into the USPO parking lot. This all happened within 60 seconds - take off was at 9:20am and the crash happened at 9:21am.
Had the plane crashed into the apartment buildings across from the PO there would have been even more loss of life. I’m at that Feu Follet Rd PO between 2-4 times per week since I mailed packages and it’s on my route home from work. My wife use to babysit the young lady who's car was pushed into the trees and caught fire.
Here is the flight path with exact time and elevation. 40 seconds into the flight the plane achieved its highest altitude, approximately 923 feet. Appears the pilot realized there was a problem as the engines were not achieving full RPM’s and begins to descend at 45 seconds into the flight. He makes a hard left turn crossing over Verot School Rd. twice before clipping telephone wires, trees, and crashing into the USPO parking lot. This all happened within 60 seconds - take off was at 9:20am and the crash happened at 9:21am.
Had the plane crashed into the apartment buildings across from the PO there would have been even more loss of life. I’m at that Feu Follet Rd PO between 2-4 times per week since I mailed packages and it’s on my route home from work. My wife use to babysit the young lady who's car was pushed into the trees and caught fire.
This post was edited on 9/17/21 at 1:26 am
Page 2 of 4
Popular
Back to top
Follow TigerDroppings for LSU Football News