- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- 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: Helicopter crash in Hudson River 6 deceased New video page 5
Posted on 4/11/25 at 2:46 pm to TigerGman
Posted on 4/11/25 at 2:46 pm to TigerGman
https://x.com/DJSnM/status/1910557461951738352
Here’s a “new” video/ different angle that shows the craft flying totally in tact a few seconds then the tail falls off then the rotor mast with rotor attached. You can also see some smoke coming from the roof (which makes sense considering the location of the engine)
Looks like the mast buckled up from the roof and cut off the tail then spun wildly a few seconds while still partially attached before finally detaching fully from the roof.
The whole ordeal seems to have been about 10 seconds. Well the time it starts to not look right to the time of impact.
There’s a better longer video from this angle on Reddit where you can see it flying it along just fine for about 13 seconds
This post was edited on 4/11/25 at 2:50 pm
2
Posted on 4/11/25 at 3:11 pm to berrycajun
quote:
Here’s a “new” video
This comment on that post seems logical, but I don't know enough about the subject to say for sure.
quote:
Tail rotor failure. Either the driveshaft or a gearbox failed. Anti torque effect immediately lost. Fuselage spins, pilot pushes pedal to no effect, tries to counteract rotation with large cyclic stick input, rotor disc deflection cuts off tail, rotor separates, cabin freefall.
Posted on 4/11/25 at 3:30 pm to paperwasp
TR has 2 gearboxes and is an output of the transmission. With the few clips I’ve seen I’d assume the transmission seized/failed or mast bearing failed which caused sudden stoppage and with the torque of that the MR & TR came apart. The MR shouldn’t come off with a TR gearbox or intermediate gearbox failure. I have no clue if it was because of mechanical failure, maintenance, or pilot error
Posted on 4/11/25 at 4:43 pm to momentoftruth87
quote:
TR has 2 gearboxes and is an output of the transmission
Not quite, only in autorotation and power off condtions. There is no "intermediate" gearbox on the BH 206 driveline. The drive to the M/R transmission comes from the front of the engine accessory gearbox output into a splined freewheeling shaft which is part of the freewheeling unit (clutch) assembly and it is bolted to the front of the engine. Power is then transmitted forward via a "short shaft" to the transmission input quill.
The T/R drive has a splined adaptor fitted to the rear of the freewheel unit shaft through the rear of the engine accessory gearbox. This adaptor connects the T/R driveline rearward to the T/R gearbox.
In short, the M/R input shaft and the T/R driveshaft are both connected through the freewheeling unit shaft which gets its power from the engine accessory gearbox.
Eta: there is an intermediate gearbox which changes direction of the T/R drive angle on the vertical fin on the Bell medium "Huey" helicopters, 204,205, 212, and 412 series airframes and it does get its power from the M/R transmission, T/R output quill.
This post was edited on 4/11/25 at 7:03 pm
Posted on 4/11/25 at 4:55 pm to TygerLyfe
quote:
Mast bumping
Well it was flying straight and level just prior to the tail flying off and then the rotar section detached. Don’t think mast bumping occurs in normal level flight or am I missing something?
Posted on 4/11/25 at 5:08 pm to berrycajun
Those poor people.
Posted on 4/12/25 at 10:58 am to paperwasp
quote:
Tail rotor failure. Either the driveshaft or a gearbox failed. Anti torque effect immediately lost. Fuselage spins, pilot pushes pedal to no effect, tries to counteract rotation with large cyclic stick input, rotor disc deflection cuts off tail, rotor separates, cabin freefall.
From that second video this describes it to a “T”
Posted on 4/12/25 at 2:01 pm to choppadocta
quote:
The roof is made up of a aluminum composite construction two layers of aluminum sandwiching aluminum honeycomb composite between the two. Composites are quite strong but not bulletproof.
This sounds similar to Boeing panels I use to assemble. Difference is the Boeing panels have a layer of aluminum, honeycomb in the middle and a composite layer of epoxy glass on the other side.
Page 5 of 5
Back to top
Follow TigerDroppings for LSU Football News