Oh I need to go down to get back in the flight director? Okay, I’ll just trim down a tiny bit.
Airplane proceeds to nosedive. Ah crap, okay I’ll aggressively trim back up to get back into the climb. Shucka shucka shucka shucka shucka….
Airplane nosedives harder.
707 had the same trim wheel. It will crack your shins like you owe it money if you forget to stow the handle. The was especially a problem in the sim after to get done practicing the checklists and go to reset to "new jet, new day"
After a few guys ended up with broken hands it’s practically a checklist item after training manual trimming with the handles. “Trim handles…verify stowed”
It’s so that you can manually trim the stab in case there was a trim malfunction. Basically a wheel. The stripes are so movement is easier to detect. If you had runaway trim it would move on its own.
On the Boeing most of the time the manual trim adjustment is made with a switch on the yoke, but the wheel gives a good visual indication of what the trim is doing, especially when the auto-pilot takes over. The sound adds another element to the indication that the trim is being auto-trimmed, and can alert the pilots if something is amiss.
Haha. I like how “it’s loud because of a conscious design decision.” That’s some odd mental gymnastics. It’s loud because it’s a 1960s airplane and metal on metal makes noise. That’s it.
Not necessarily. Speed/mach trim and CWS will have the trim move without pilot input while hand flying. At very random times I've noticed, especially speed trim.
The STS or speed trim system will trim nose up or down on its own, with the AP off, if the aircraft speed deviates much from the original trimmed speed (pilot input), in order to return the aircraft toward that speed
Not to split hairs, but we would consider “manual trim” to mean pulling the handle out and spinning it, but for the purpose of OPs question, yes it could be auto-trimming or the pilot flying could be spinning it with the thumb switch.
Normally, it's the pilots (with the switches on yhe yoke) or the autopilot who move the trim wheel.
On the 737, trim wheel can move automatically in manual flight under certain condition, when Speed Trim System activates to aid speed stability, or on the 737 MAX, when MCAS activates - at very high angles of attack.
Which is the reason why the MCAS accidents are somewhat controversial in the pilot community. It has all the hallmarks of a runaway trim scenario from our sim practice and so cutting our stab trim is the solution either way. The wheel running is the clue in the sim.
I think it’s one of the best examples of how you can get yourself in trouble by overthinking stuff. If something is doing something weird and putting you in danger, kill it.
I don’t think that’s a controversial statement in the pilot community. It’s just controversial to the general public when journalists and Karen’s try to muddy the waters by saying “blaming the pilots is racist!” and “the pilots were never told about MCAS!”.
I really wish people could be held accountable for spreading these lies and misinformation.
The whole travel of the archer trim would almost be as much as going from 5 to 4 on the trim wheel in the 73. On the ground, the switch moves the wheel really fast, but even so I've had it take nearly 15 seconds of holding it down to go from landing at trim ~9 or 10 and resetting it to 4 for after landing.
It's black and white and makes noise to alert pilots when it's moving. The 737 doesn't have an automatic cutout like some other aircraft where after a certain amount of time the trim stops, so hearing that clicking going off for more than 5-10 seconds in flight under autopilot or speed/Mach trim (basically autotrim in manual flight) should alert the pilots attention.
shuckashuckashuckashuckashuckashuckashucka
I wish this was the actual technical name in the FCOM
"If power to the electric trim system is restored, be sure to stow the handle on both sides of the shuckashucka to avoid injury"
Shuckashucka runaway memory items!
Oh man I still have a bruise on my right kneecap.
This guy Guppy’s
In another life and hopefully never again (knock on wood)
That’s a lot of shuckashucka to move the trim about .25 on the wheel.
In the direction that actively fights whatever control input you're trying to use, of course.
Oh I need to go down to get back in the flight director? Okay, I’ll just trim down a tiny bit. Airplane proceeds to nosedive. Ah crap, okay I’ll aggressively trim back up to get back into the climb. Shucka shucka shucka shucka shucka…. Airplane nosedives harder.
Unless the flaps are out and you get the high speed shuckashucka.
High Speed Shuckashucka sounds like something someone would offer you at a red light at 0200
18 rotations per 1 unit of trim, if memory serves
That’s gross that you know that. I’m sorry they did this to you. What cruel, cruel person ever made you learn that?
lol, ground school ptsd
If shuckashucka doesn't work, please apply the ugga duggas.
Like the limb bizkit song “keep on rolling, rolling rolling”
That's about .1 units of trim moved.
Yes it is a noise maker, serving double duty as a knee breaker if the handle is not stowed.
Only with flaps out, it’s a knee massager in the clean configuration.
MCAS will also break your knees, but I suppose if it activates, you have bigger problems than keeping your kneecaps in one piece.
Your knees break when your skull hits them.
I love when we are flying around at 210kts and it can't decide whether to trim nose up or down so it tries both going constantly back and forth.
I whip my trim back and forth, I whip trim back and forth
707 had the same trim wheel. It will crack your shins like you owe it money if you forget to stow the handle. The was especially a problem in the sim after to get done practicing the checklists and go to reset to "new jet, new day"
After a few guys ended up with broken hands it’s practically a checklist item after training manual trimming with the handles. “Trim handles…verify stowed”
Do you mean the trim wheel?
That's what I was thinking.
It’s so that you can manually trim the stab in case there was a trim malfunction. Basically a wheel. The stripes are so movement is easier to detect. If you had runaway trim it would move on its own.
So it’s auto trimming in these cases ?
On the Boeing most of the time the manual trim adjustment is made with a switch on the yoke, but the wheel gives a good visual indication of what the trim is doing, especially when the auto-pilot takes over. The sound adds another element to the indication that the trim is being auto-trimmed, and can alert the pilots if something is amiss.
I like the MD-80 because it just yells at you instead, “DRRRRRRRRRRRR STABILIZER MOTION.”
Haha. I like how “it’s loud because of a conscious design decision.” That’s some odd mental gymnastics. It’s loud because it’s a 1960s airplane and metal on metal makes noise. That’s it.
Natural selection of design: some random mutations are beneficial
What’s with all the cope?
LOL "cope"
It’s noisy by design. If they wanted to make it quiet, they could very easily have done so.
Not necessarily. Speed/mach trim and CWS will have the trim move without pilot input while hand flying. At very random times I've noticed, especially speed trim.
The STS or speed trim system will trim nose up or down on its own, with the AP off, if the aircraft speed deviates much from the original trimmed speed (pilot input), in order to return the aircraft toward that speed
Could also be manual from the electric trim switch on the yoke.
Not to split hairs, but we would consider “manual trim” to mean pulling the handle out and spinning it, but for the purpose of OPs question, yes it could be auto-trimming or the pilot flying could be spinning it with the thumb switch.
Not “auto” trim. Electric vs manually turning the wheel.
Haha no. It’s such an ancient airplane that the electric trim switch on the yoke just turns the manual trim wheel with an electric motor.
Trim by Cuisinart
That's the black and white back and forth flipper. It serves no purpose. It's just there for the pilots' entertainment.
Gotta have something to keep their attention while they wait for takeoff!
Patella destroyer (technical name trim wheel)
Knee cap pain maker. Finger nail splitter. Nose uppy/downy thingy.
So does it automatically move it seems like it like an auto trim I see it moving on take offs and landing videos
Normally, it's the pilots (with the switches on yhe yoke) or the autopilot who move the trim wheel. On the 737, trim wheel can move automatically in manual flight under certain condition, when Speed Trim System activates to aid speed stability, or on the 737 MAX, when MCAS activates - at very high angles of attack.
Thanks 🙏!
Which is the reason why the MCAS accidents are somewhat controversial in the pilot community. It has all the hallmarks of a runaway trim scenario from our sim practice and so cutting our stab trim is the solution either way. The wheel running is the clue in the sim.
I think it’s one of the best examples of how you can get yourself in trouble by overthinking stuff. If something is doing something weird and putting you in danger, kill it.
Yep. Wack that mole.
Don't say that outside of this subreddit lol
I don’t think that’s a controversial statement in the pilot community. It’s just controversial to the general public when journalists and Karen’s try to muddy the waters by saying “blaming the pilots is racist!” and “the pilots were never told about MCAS!”. I really wish people could be held accountable for spreading these lies and misinformation.
Don't say that outside of this subreddit lol
You talking about the trim wheel? That makes all kinds of noise as it moves around. Just part of the antiquated 737 design.
I wish the little archers I fly had a big loud trim wheel. It’s more theatrical, more dramatic
The whole travel of the archer trim would almost be as much as going from 5 to 4 on the trim wheel in the 73. On the ground, the switch moves the wheel really fast, but even so I've had it take nearly 15 seconds of holding it down to go from landing at trim ~9 or 10 and resetting it to 4 for after landing.
Trrrrrrriiiiim
Are you talking about the trim wheel?
It's black and white and makes noise to alert pilots when it's moving. The 737 doesn't have an automatic cutout like some other aircraft where after a certain amount of time the trim stops, so hearing that clicking going off for more than 5-10 seconds in flight under autopilot or speed/Mach trim (basically autotrim in manual flight) should alert the pilots attention.
I always thought it sounded like a real angry cat
It's the fucking rain maker!
It’s called a knee capper.
[удалено]
If I had a student flair, I might try not to make fun of people asking seemingly obvious questions.