|
Sagebrush posted:Sure hope you shut down properly by pulling to idle Doesn't help that much. Fumes waft into the cylinders, enough to fire a good couple of times
|
#
?
Mar 4, 2021 04:17
|
|
|
|
| # ? Jun 7, 2024 19:24 |
|
|
vessbot posted:Doesn't help that much. Fumes waft into the cylinders, enough to fire a good couple of times Yeah, hitting the fuel cutoff is usually the prescribed solution.
|
|
#
?
Mar 4, 2021 04:19
|
|
|
ImplicitAssembler posted:Yeah, hitting the fuel cutoff is usually the prescribed solution. Don't recall ever seeing that on any normal checklist. Better to get that wire fixed, and stay out of the prop arc.
|
|
#
?
Mar 4, 2021 04:27
|
|
|
Cojawfee posted:Didn't they make these so you could have multiple engines, but because they are inline, you don't need a multi-engine rating? You get a multiengine rating with a limitation for centerline thrust only. Same way with T-38/F-5, Rafales, Typhoons, and F-22s. Gotta get into the F-15 for the good stuff.
|
|
#
?
Mar 4, 2021 04:55
|
|
|
slidebite posted:How have I not heard of a push/pull Cessna? generic_337_is_loud_joke.txt
|
|
#
?
Mar 4, 2021 04:57
|
|
|
slidebite posted:How have I not heard of a push/pull Cessna? Didn't you ever see the Gene Hackman/Danny Glover flick "BAT*21"? Glover flies an O-2 skymaster which is the military version of that for forward air control.
|
|
#
?
Mar 4, 2021 05:23
|
|
|
Yeah I’ve seen them in museums.
|
|
#
?
Mar 4, 2021 05:30
|
|
|
ImplicitAssembler posted:It's just a clutch/freewheel. It'll disengage the moment you cut the throttle (or engine quits). There's no button to hit, but you do have to be fairly smart with lowering the collective and start auto-rotating. I do specifically remember the whole 'needing to press a button to disengage the belt system' being a thing that the guy told me, but Helicopter Joe loved nothing more than to gently caress with people so I guess thats what I get. Your explanation makes a lot more sense LibCrusher posted:Gaahahaha my instructor never taught me this! RPMs never dropped when we checked left mag in his plane (: There is some cause for concern here EvenWorseOpinions fucked around with this message at 06:01 on Mar 4, 2021 |
|
#
?
Mar 4, 2021 05:57
|
|
|
priznat posted:Didn't you ever see the Gene Hackman/Danny Glover flick "BAT*21"? Glover flies an O-2 skymaster which is the military version of that for forward air control. Then there was time they mated a Pinto to (part of) one...
|
|
#
?
Mar 4, 2021 06:00
|
|
|
priznat posted:Didn't you ever see the Gene Hackman/Danny Glover flick "BAT*21"? Glover flies an O-2 skymaster which is the military version of that for forward air control. They also feature rather prominently in the Dark Comedy "Project X." The 1987 one, not the 2010-era bro-ey house party film.
|
|
#
?
Mar 4, 2021 06:05
|
|
|
Do larger planes have magnetos? I ran the question by my brother but got something amounting to “Do you mean the APU?” Granted there were marines in his flight unit so they make have skimmed the hard to spell parts.
Warbird fucked around with this message at 05:51 on Mar 5, 2021 |
|
#
?
Mar 4, 2021 06:09
|
|
|
Magnetos are only used on recip engines, but pretty much all aviation recip engines use them. Turbine engines use igniter plugs which don't need to be timed to a cylinder because turbines don't have engine timing, so they just fire all the time during startup, takeoff, and landing for most turbine engine planes VVV also some experimentals that use electronic ignition VVV EvenWorseOpinions fucked around with this message at 06:15 on Mar 4, 2021 |
|
#
?
Mar 4, 2021 06:11
|
|
|
EvenWorseOpinions posted:Magnetos are only used on recip engines, but pretty much all aviation recip engines use them. the only exceptions as far as I know are diesel engines, like on the DA-42 and newer DA40s. they’re weird
|
|
#
?
Mar 4, 2021 06:13
|
|
|
Lots of recips have electronic ignition now, but it's set up the same way with redundant systems sparking redundant plugs. And checked the same way. It's not guaranteed to be bad if rpm doesn't drop on the check, it could simply be running well enough that losing a plug doesn't make a noticable difference in power output.
|
|
#
?
Mar 4, 2021 06:20
|
|
|
vessbot posted:Don't recall ever seeing that on any normal checklist. Better to get that wire fixed, and stay out of the prop arc. It was part of our regular emergency procedures: You land, turn off the mags and engine keeps running, what next? ImplicitAssembler fucked around with this message at 06:33 on Mar 4, 2021 |
|
#
?
Mar 4, 2021 06:31
|
|
|
You land and park, pull the mixture to idle-cut, and let it die from fuel exhaustion. Then you turn the mags off. If the mixture control broke and that didn't kill the engine then yeah I suppose the fuel cutoff would be next.
|
|
#
?
Mar 4, 2021 06:33
|
|
|
Right. Forgot about mixture..Didn't have that on our Bell47s  .
|
|
#
?
Mar 4, 2021 06:35
|
|
|
ImplicitAssembler posted:It was part of our regular emergency procedures: You land, turn off the mags and engine keeps running, what next? throttle wide open til fuel starvation
|
|
#
?
Mar 4, 2021 06:36
|
|
|
Sagebrush posted:Oof. That's why noticing that the RPM does drop during the mag check is just as important as noticing that it doesn't drop too much! Neat! I've seen my dad fiddle with the key before takeoff at least two dozen times and never known (or asked) why the RPMs drop
|
|
#
?
Mar 4, 2021 06:53
|
|
|
If you get the timing on moving the key wrong on a mag check (by leaving it on "off" too long) , you can get a pretty impressive backfire, which can also be a very expensive noise if it blows out part of the exhaust system. Magnetos also have a noise filter that keeps the electrical current they produce from interfering with the rest of the electrical system, and if that fails, you get to listen to a supremely annoying "clickclickclick" over your headset every time the spark plugs fires, which gets really old really fast.
|
|
#
?
Mar 4, 2021 08:26
|
|
|
Always Be Checklisting
|
|
#
?
Mar 4, 2021 09:13
|
|
|
|
|
#
?
Mar 4, 2021 12:52
|
|
|
Needs the post-landing explosion for symmetry tbh
|
|
#
?
Mar 4, 2021 12:56
|
|
|
Ola posted:Lots of recips have electronic ignition now, but it's set up the same way with redundant systems sparking redundant plugs. And checked the same way. At the flying school I did my few hours of PPL lessons with, it was procedure to, once a week (after the last flight on a Friday, IIRC), briefly set the magneto/starter switch to 'Off' just prior to shutdown with the engine at ground idle (1000-1200rpm) to see that the engine did actually cut out and therefore that both the magneto earths were good. Then you let the engine come back to idle speed and stopped it with the mixture lever. As you say, the mag check on run-up should also catch it, but a couple of the planes evidently had rather healthy (or unhealthy...) engines/magnetos where the drop in rpm with one mag off was really tiny - the brief buzzing noise from the prop as the power reduced was much more noticeable.
|
|
#
?
Mar 4, 2021 13:10
|
|
|
CommieGIR posted:Explains why it started slewing to one side.
|
|
#
?
Mar 4, 2021 20:06
|
|
|
Timmy Age 6 posted:Paging Nebakenezzar... Oooohhhhhh, thanks. One thing that caught my eye was the "retrofitting of a 750 kW system." Sounds like they did some physical work on a smaller fuel cell setup before deciding they needed double the power. Given the known power output of other modern airships, I wonder if you could extrapolate facts by the stated power output? Oh, and when power is quoted, is that gross or net? Platystemon posted:An airships is like the only vehicle large and slow enough that putting solar panels on it might make sense. Not an engineer, so not an engineer, here But I think the all important useful lift ratio would forbid conventional solar power cells. I know it was a goal of that crazy ISIS aerosat Lockheed was pitching for awhile, (IE have a lifting envelope generating solar power) wait I've cracked it, here's what you do: made the airship envelope transparent, and then have the airship structural members be constructed from photovoltic cells you know, like that fish that can see through its own head
|
|
#
?
Mar 4, 2021 20:37
|
|
|
Nebakenezzer posted:you know, like that fish that can see through its own head Barreleye
|
|
#
?
Mar 4, 2021 22:26
|
|
|
 https://twitter.com/xJonNYC/status/1366851756634873858 Summation of the thread: - A Frontier Airlines plane was supposed to be deiced prior to takeoff from Nashville - The deicing company informed the crew that the aircraft was deiced and clear of contaminants - Upon reaching the runway, a flight attendant noticed there was still a significant buildup of snow and ice on the wings, and informed the pilots - The plane returned to the gate, at which point it was discovered that there was about a foot of snow on the wings - Apparently the deicing company had run low on deicing fluid, and suffice to say the agreement with the deicing company was terminated - The US Federal Aviation Administration (FAA) is now investigating this incident BIG HEADLINE fucked around with this message at 17:27 on Mar 5, 2021 |
|
#
?
Mar 5, 2021 17:25
|
|
|
"Should we tell them we ran out of deicing fluid and it's going to be a bit before we can get more?" "Nah, the snow will just fall off when they take off, I think" "How many people you think are on that plane?" "I dunno, a couple of hundred? Why?" "Nothing", *over comms* "Yer good to go buddy! Have a safe one!"
|
|
#
?
Mar 5, 2021 17:46
|
|
|
You know I had always assumed that the deicing technicians were fully trained in their field and would know everything there is to know about properly deicing planes, and the consequences of not doing so. They'd have the concept that "even a thin layer of frost can reduce the airfoil's lift by half" foremost in their heads at all times. They certainly wouldn't just be yahoos driving the truck with a vague instruction to "spray this stuff all over the plane." That's not the case, is it.
|
|
#
?
Mar 5, 2021 18:07
|
|
|
Sagebrush posted:You know I had always assumed that the deicing technicians were fully trained in their field and would know everything there is to know about properly deicing planes, and the consequences of not doing so. They'd have the concept that "even a thin layer of frost can reduce the airfoil's lift by half" foremost in their heads at all times. They certainly wouldn't just be yahoos driving the truck with a vague instruction to "spray this stuff all over the plane." I’m going to put the over under on their hourly pay at $12. (I’m taking the under)
|
|
#
?
Mar 5, 2021 18:11
|
|
|
Sagebrush posted:You know I had always assumed that the deicing technicians were fully trained in their field and would know everything there is to know about properly deicing planes, and the consequences of not doing so. They'd have the concept that "even a thin layer of frost can reduce the airfoil's lift by half" foremost in their heads at all times. They certainly wouldn't just be yahoos driving the truck with a vague instruction to "spray this stuff all over the plane." please try and not think about that, but for the engineers who make the computer systems for the 300 ton machines flying 10km above the ground
|
|
#
?
Mar 5, 2021 18:12
|
|
|
hobbesmaster posted:I’m going to put the over under on their hourly pay at $12. I decided I missed working at an airport and was asking around FBOs to see if they had any openings for part time and what they would be willing to pay an A&P just to do ramp work, they told me they could probably start me off near the top of the pay grade, at $10/hr
|
|
#
?
Mar 5, 2021 18:59
|
|
|
Is there no pre-flight inspection for airliners? You just jump in the cockpit and go?
|
|
#
?
Mar 5, 2021 20:35
|
|
|
Sagebrush posted:You know I had always assumed that the deicing technicians were fully trained in their field and would know everything there is to know about properly deicing planes, and the consequences of not doing so. They'd have the concept that "even a thin layer of frost can reduce the airfoil's lift by half" foremost in their heads at all times. They certainly wouldn't just be yahoos driving the truck with a vague instruction to "spray this stuff all over the plane." People who know that much are too valuable to waste spraying stuff all over a plane.
|
|
#
?
Mar 5, 2021 20:35
|
|
|
Cojawfee posted:Is there no pre-flight inspection for airliners? You just jump in the cockpit and go? You preflight, taxi to the deice pad, get deiced, and go. There’s a holding time limit on deicing.
|
|
#
?
Mar 5, 2021 20:38
|
|
|
Cojawfee posted:Is there no pre-flight inspection for airliners? You just jump in the cockpit and go? The pilots do a preflight walk-around, yes. Deicing occurs minutes before takeoff, though, when the plane is loaded and the engines are running, so unless a flight attendant looks out the window there isn't really a way for the pilots to verify that it was done correctly. Well I guess the A380 has a camera on the tail that the pilots could maybe use to check things out.
|
|
#
?
Mar 5, 2021 20:39
|
|
|
Don’t lots of wide bodies have cameras? I watched a forward view on the seat back display on a China airlines A330 for example.
|
|
#
?
Mar 5, 2021 20:41
|
|
|
hobbesmaster posted:Don’t lots of wide bodies have cameras? Some do, but even if all did, that would still make them a pretty small percentage of the airline fleet. And this A320 operated by Frontier, would not be one of them.
|
|
#
?
Mar 5, 2021 21:00
|
|
|
|
| # ? Jun 7, 2024 19:24 |
|
|
Cojawfee posted:Is there no pre-flight inspection for airliners? You just jump in the cockpit and go? There's a walk around, but it can only cover what the crew can see from the ground, which doesn't include the tops of the wings, and on a lot of airplanes, the wings are essentially invisible from the flight deck unless you stick your head out a side window. On the Q400, the tops of the wings can't be seen without a ladder or bucket truck, so our pre-takeoff contamination check after deicing consists of looking back from the flight deck at "representative surfaces", which are basically the outboard 5-6 ft of the wing, and then extending the spoilers to see if anything is sticking to the upper part of the wings. Sagebrush posted:You know I had always assumed that the deicing technicians were fully trained in their field and would know everything there is to know about properly deicing planes, and the consequences of not doing so. They'd have the concept that "even a thin layer of frost can reduce the airfoil's lift by half" foremost in their heads at all times. They certainly wouldn't just be yahoos driving the truck with a vague instruction to "spray this stuff all over the plane." You're 100% correct that it isn't. A couple of years ago, SEA changed to a new contractor for deicing, which proudly advertised that they paid minimum wage. I'm sure the fact that the company then proceeded to hit about a half-dozen airplanes with the booms on the trucks had nothing to do with it.
|
|
#
?
Mar 5, 2021 21:07
|
|