so I can put you down as a maybe?
PS - did the engineers find the Illudium Q-36 explosive space modulator ?
they did…it was right behind the spare Dilithium Crystals (I just know that Fraq is going to love this one)
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Well, I do care to be amused, early and often.
So please feel free to persist. 100% correct, or 100% in error. it really doesn’t matter to me.
After all, it is the internet, so if it is here, it must be true…
No I do think he is right , I stopped worrying about your opinions long ago. When you say you have worked in a broader sector of the industry that translates to your an asshole with a big license that company’s hire and hold on to until the crew threatens to quit and the office is forced to let you go. Your ego probably gets out in front of you being able to keep a job longer than a couple years at a time and now that half the industry won’t hire you you have decided to do your own thing. To make yourself feel superior you must regularly remind people of your UL license and how everyone else is too stupid to run a boat. I bet you feel that a clone of you would be the only worthy mariner to sail with you. And that every idea you have is far superior to anyone else’s ideas. So yeah, your constant belittling of GOM mariners falls mostly on deaf ears.
thinking about it, I rather like being called “Captain Stompy Feet”…perfect for stepping on slugs and other slithering creatures here
plus the world famous “Hat n Boots” Gas Station was located for decades down in the Seattle Industrial area by the 1st Ave South Bridge. I remember it very well…
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what was that?..I couldn’t hear a word you uttered, your voice is so tiny and barely audible
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always glad to be of service with a smile
So please feel free to persist. 100% correct, or 100% in error. it really doesn’t matter to me.
thanks…that makes it a very easy bar to go under
After all, it is the internet, so if it is here, it must be true…
of course it is…I commandeth it!
So wait, you have sailed in all sectors of the marine industry? Doesn’t that make you a jack of all trades and a master of none? Or is it just that you’ve sailed on the biggest vessels in the industry so therefore everything else is beneath you? Capt Stompy Feet UL Master of None. Now there is and UL license that is long overdue for issuance.
Capt Stompy feet has over 7,000 posts on here. If there is anybody on here that loves to hear themselves talk it’s him. I mean you must sit in front of your computer all day. Like I said, flogging a dead horse and reminiscing about the good old days of when everything was better (because people still listened to my opinions). Now they’re just the I audible rumblings of a sad old shore bound sailor running a launch service.
like I said…
I was walking around outside today barefoot and I stepped on a slug. at first I was like w/e but about 10 minutes later I read online that slugs can give you parasites if you have dry skin and make you very sick. I immediately washed off my foot with a bunch of dish soap. I got all of the slime and stuff off but I’m still freaking out. I have pretty smooth skin on my feet but still. I’m sorry if this sounds stupid but I get paranoid very easily. is this going to make you sick? btw,I live in North Carolina and the slug was about 1 1/2 inches long and brownish green. If you could identify the species that would be great.
thanks a lot
Update : and I usually wear shoes but I was just getting the mail so whats the point? it was just easier.
and
Not a fear of slugs a fear of stepping on slugs, or seeing a slug thats been stepped on… Last year I stepped on a slug and felt it burst and completely freaked out and then last month it was raining heavily and I was out walking the dog on a field and before I stepped I had to inspect every square inch, in terror I would step on a slug. Tonight my worst fears came about, I stepped BAREFOOT into a slug, I was gagging and heaving and in a right state, I washed my feet in the shower six times over and scrubbed it in with a body lily with a separate body lily refusing to use the same one, then I used a disinfectant on my foot, moisturized it and sprayed perfume on it and I still feel contaminated. Does anyone know if there is a phobia of stepping or seeing a stepped on slug?
living in the NW, I FUCKING loath the EMM EFFING creatures!
[QUOTE=Number360;145240]… When you say you have worked in a broader sector of the industry that translates to your an asshole with a big license that company’s hire and hold on to until the crew threatens to quit and the office is forced to let you go. …[/QUOTE]
I nearly choked laughing.
That is a damned fine retort.
And it’s on the Internet, so it is true.
[QUOTE=Fraqrat;145234]Air conditioned propulsion motors? Now I’ve heard of everything![/QUOTE]
not surprised one bit my swamp bred friend…
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[QUOTE=+A465B;145251]I nearly choked laughing.
That is a damned fine retort.
And it’s on the Internet, so it is true.[/QUOTE]
just for that you get an authentic 19th century fruitcake from me this Christmas…plus a whole truckload of zucchinis arriving at 2:30 this morning
[QUOTE=Fraqrat;145234]Air conditioned propulsion motors? Now I’ve heard of everything![/QUOTE]
Not too far fetched…Late '60s, early '70s Tidewater had a couple of crewboats , ARAPAHO and CHEROKEE with air conditioned intakes for the 98 or 99 Cats. The aftercoolers couldn’t keep up on their own in Gulf temps.
I have worked on a couple of vessels with air conditioned SCR rooms.
[QUOTE=c.captain;145252]
just for that you get an authentic 19th century fruitcake from me this Christmas…plus a whole truckload of zucchinis arriving at 2:30 this morning[/QUOTE]
Looking forward to it !
Have a nice evening.
just about all vessels with AC propulsion have their VFD’s in sealed and climate controlled spaces. Humidity is not the friend of that breed of equipment.
now a lesson for all you idiot GoM engineers here
A variable-frequency drive (VFD)(also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.
Controller
The VFD controller is a solid state power electronics conversion system consisting of three distinct sub-systems: a rectifier bridge converter, a direct current (DC) link, and an inverter. Voltage-source inverter (VSI) drives are by far the most common type of drives. Most drives are AC-AC drives in that they convert AC line input to AC inverter output. However, in some applications such as common DC bus or solar applications, drives are configured as DC-AC drives. The most basic rectifier converter for the VSI drive is configured as a three-phase, six-pulse, full-wave diode bridge. In a VSI drive, the DC link consists of a capacitor which smooths out the converter’s DC output ripple and provides a stiff input to the inverter. This filtered DC voltage is converted to quasi-sinusoidal AC voltage output using the inverter’s active switching elements. VSI drives provide higher power factor and lower harmonic distortion than phase-controlled current-source inverter (CSI) and load-commutated inverter (LCI) drives. The drive controller can also be configured as a phase converter having single-phase converter input and three-phase inverter output.
Controller advances have exploited dramatic increases in the voltage and current ratings and switching frequency of solid state power devices over the past six decades. Introduced in 1983, the insulated-gate bipolar transistor (IGBT) has in the past two decades come to dominate VFDs as an inverter switching device.
In variable-torque applications suited for Volts per Hertz (V/Hz) drive control, AC motor characteristics require that the voltage magnitude of the inverter’s output to the motor be adjusted to match the required load torque in a linear V/Hz relationship. For example, for 460 volt, 60 Hz motors this linear V/Hz relationship is 460/60 = 7.67 V/Hz. While suitable in wide ranging applications, V/Hz control is sub-optimal in high performance applications involving low speed or demanding, dynamic speed regulation, positioning and reversing load requirements. Some V/Hz control drives can also operate in quadratic V/Hz mode or can even be programmed to suit special multi-point V/Hz paths.
The two other drive control platforms, vector control and direct torque control (DTC), adjust the motor voltage magnitude, angle from reference and frequency so as to precisely control the motor’s magnetic flux and mechanical torque.
Although space vector pulse-width modulation (SVPWM) is becoming increasingly popular, sinusoidal PWM (SPWM) is the most straightforward method used to vary drives’ motor voltage (or current) and frequency. With SPWM control, quasi-sinusoidal, variable-pulse-width output is constructed from intersections of a saw-toothed carrier frequency signal with a modulating sinusoidal signal which is variable in operating frequency as well as in voltage (or current).
Operation of the motors above rated nameplate speed (base speed) is possible, but is limited to conditions that do not require more power than the nameplate rating of the motor. This is sometimes called “field weakening” and, for AC motors, means operating at less than rated V/Hz and above rated nameplate speed. Permanent magnet synchronous motors have quite limited field weakening speed range due to the constant magnet flux linkage. Wound rotor synchronous motors and induction motors have much wider speed range. For example, a 100 hp, 460 V, 60 Hz, 1775 RPM (4 pole) induction motor supplied with 460 V, 75 Hz (6.134 V/Hz), would be limited to 60/75 = 80% torque at 125% speed (2218.75 RPM) = 100% power. At higher speeds the induction motor torque has to be limited further due to the lowering of the breakaway torque of the motor. Thus rated power can be typically produced only up to 130-150% of the rated nameplate speed. Wound rotor synchronous motors can be run at even higher speeds. In rolling mill drives often 200-300% of the base speed is used. The mechanical strength of the rotor limits the maximum speed of the motor.
An embedded microprocessor governs the overall operation of the VFD controller. Basic programming of the microprocessor is provided as user inaccessible firmware. User programming of display, variable and function block parameters is provided to control, protect and monitor the VFD, motor and driven equipment.
The basic drive controller can be configured to selectively include such optional power components and accessories as follows:
Connected upstream of converter - circuit breaker or fuses, isolation contactor, EMC filter, line reactor, passive filter Connected to DC link - braking chopper, braking resistor Connected downstream of inverter - output reactor, sine wave filter, dV/dt filter.
now if you are a licensed engineer on a ship equipped with such equipment should you not be able to understand the theory behind it’s operation and how it works beyond simply hitting the “start” button?
the real question however is how many OSV engineers actually do? even more important…how many are actually capable of understanding any of this?
[QUOTE=+A465B;145255]Looking forward to it !
Have a nice evening.[/QUOTE]
see you tomorrow pardner…
What about the THD?
What THD is allowed by class (LR? ABS? )
What effects will THD have on electrical equipment?
How can you do a quick field check to see if THD might be a problem aboard, say if it is 10% ? What will show this that you do not need an instrument to check?
Chew on that for a bit, and identify several likely sources of it on the LV bus (not the propulsion bus).
Now have a better night.
Zucchini Bread.
Yeah, that’s the ticket.
[QUOTE=+A465B;145259]How can you do a quick field check to see if THD might be a problem aboard, say if it is 10% ? What will show this that you do not need an instrument to check?[/QUOTE]
somebody call the E/T and ask him to check the satellite again…there’s all this signal noise and the damned game is barely coming in!
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[QUOTE=c.captain;145263]somebody call the E/T and ask him to check the satellite again…there’s all this signal noise and the damned game is barely coming in![/QUOTE]
My primary job with Mobil as electrician in 1976 was maintaining the largest log periodic TV antenna I’ve ever seen, telescoping tower and rotator. We had a reel to reel video recorder for all broadcasted games.
Don’t cast too broad a net about us GOM engineers. Some of us achieved Chief Motor and GT. We’ve also seen unlimited Capts and Chiefs have their asses handed to them on tugs and OSVs.
I’ve never sailed on vessels with VFD propulsion, only SCR with DC motors. I do have extensive experience with VFDs on pump motors and IG systems. Same principle.
Don’t take C. Captain too personally. He is handicapped by a giant penis pump resting on his shoulders. Couple more pumps and that things gonna explode.
You mean these big fancy boxes I walk by a million times a day? I didn’t understand all that science fiction you posted. I think they say MV3000 on them but that ain’t the boats name, maybe they’re stolen…
[QUOTE=Fraqrat;145267]You mean these big fancy boxes I walk by a million times a day? I didn’t understand all that science fiction you posted. I think they say MV3000 on them but that ain’t the boats name, maybe they’re stolen…[/QUOTE]
you sure they don’t have NCC1701 on them
anyway, the VFD cabinets are where those mysterious dilithium crystals are kept plus they are a great place to hide tribbles!
Can you smoke “tribbles” or just get 'em as chew?
Will they stain the paint when you spit 'em out ?
Can tribble abuse be detected by a drug test?