I have test data for the power generated by a wind turbine at 45m/s airspeed, at sea level. I want to extrapolate this to 100KEAS at 10,000ft (project requirement).
I can obtain the turbine efficiency from a re-arranged turbine equation. Then using the new air density (0.92) and airspeed I can find out estimate for the power generated by the same turbine at 100KEAS and 10,000ft.
My question is, do I use 100KEAS in m/s (51.4m/s), or convert 100KEAS to the True Airspeed (59m/s) and use that, in the turbine equation.
Due to the cube term in the turbine power equation these have a big impact, so want to be sure.
Thanks for any guidance!
In the pilot's handbook of aeronautical knowledge they start off saying : "dynamic pressure is present only when an aircraft is in motion... Wind also generates dynamic pressure . It does not matter if the aircraft is moving through still air at 70 knots or if the aircraft is facing a wind speed of 70 knots , the same dynamic pressure is generated" So if the plane was parked motionless on the ground and a headwind of 50 knots was to blow would I read 50 knots on the ASI or would it show a 0 on: -both indicated and true airspeed -only indicated airspeed -only true airspeed
Hi everyone, maybe some of you remember me from my old posts about wanting to become a pilot and flying a discovery flight, today i'm here with a question i'm having a hard time to figure out from other sources.
First of all, what is the difference between KIAS and the true airspeed(KTAS, right?)? I've read about this but i can't fully understand it.
So, from what i understand most of the helicopters have a Vne mostly because of retreating blade stall (i know what it is but if you have a good resource i can read about it i'll be happy) and not from structural problems. From what i've read the Vne is in KIAS, and on the r22 POH i saw that with altitude (pressure altitude maybe?) and OAT it changes, is this because with thinner air is easier for the retreating blade to stall? Does this happen only on r22s or, for exaple an aw139 has different Vne in relation to altitude/OAT? Let's say, the AW139 has a Vne of 167kt (at sea level) listed on the website, if i go, let's say at 5000' will that Vne still be 167kt or it will be lower due to the lesser air density? Is there a way to calculate it or you have to read it on the POH?
When the Vne is calculated is the critical mach number of the advancing blade considered or the speed to get to it are higher by a lot? I know really bad things happen if you reach the critical mach number.
As always fly safe, you pilots have a job i can only dream of.
Hey guys. Just wondering, what is the relation between aircraft sizes (short-ranged, medium-ranged and large-ranged) and their true airspeed? Since the size is proportional to the aircraft's mass, it could also mean the relation between mass and true airspeed. Can anyone provide me any links or references to read?
Thanks.
Getting into flight sims and aviation recently and one thing I can't get my head around is the difference between Airspeed and Ground speed as well as when and how to reference them.
I had a read of this: http://en.wikipedia.org/wiki/Airspeed But it just confused me more!
Thanks! :D
Any pilots out there good with jet logs? Any help would be greatly appreciated!!!
4+ hour flight in a cessna 208, engine died just under 11 minutes from my destination. I know nothing about flight planning, I've depended on the white circle in the game to judge my fuel consumption. Anyone have a good YouTube website recommendation for me? Thanks.
I hear that in a regional jet, you don't do it like a Cessna, where you use the power for altitude, and pitch for airspeed.
Is it true, in a jet you use power for airspeed and pitch for altitude the whole way, even for landing?
Am I doing something wrong? Apparently the top speed is 495kn but I always seem to cap out at 280-300kn at cruising altitude. Unless I am mistaking the speed for the wrong unit of measurement.
I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.
Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.
Ive been told 250kts below but not including 10000ft and have been told there is no speed restriction at 10000ft. Based on my interpretation of FAR 91.117 the latter case is true (no restriction at 10000).
Here is an excerpt from the FAR:
§ 91.117 Aircraft speed.
(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.).
Do your worst!
The pair followed the squad of marines ahead of them. It had been close to 30 hours since they had last slept. Cav was passing out as she walked and Frost was not doing much better. They were headed back to the barracks. Frost knew that he would have to dump his commander off somewhere before he headed back to his Wyvern.
He had left the majority of his weapons inside its cockpit, not to mention that his suit’s life support pack was still plugged into the charging port. They reached the barracks, and Frost informed that he had to go grab his weapons and suit life support from the Wyvern.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When we got to the barracks we started packing our gear and getting it organized. Most of the infrastructure was gonna stay behind as the army was coming in to take over and help rebuild and take out any pockets of resistance we missed. Cav was sleeping in a corner, we decided we valued our life's enough to not wake the giant predator, especially after seeing those claws earlier.
"It sucks we gotta babysit those two, I was looking to fuck or get fucked up on shore leave, but now I gotta be all responsible and shit." Josh said, pretty annoyed. He lifted a pack of supplies onto his back.
"Please, the only women who wanna fuck you are the ones you can pay for." Christy said as she picked up a box.
"But I CAN drown my sorrows in alcohol. Or at least I could have." Josh replied back, looking at her.
Luca picked up his gear to move it into a corner. "I don't know about you but I'm not letting that get in the way. I refuse to spend the night alone. It's been too damn long, if you know what I mean."
I picked up my gear and moved it into the same pile as Luca "Oh I think we all feel the same way, it's been like what, three years I think? But someone in the group has to be the adult and make sure you or our guests don't get into trouble."
Shira came up behind me, with her own gear. "It's alright Daniel, I will probably be right there with you. Can't let these kids get us in trouble with planetary police. I don't wanna be locked up on base for the entirety of our shore leave."
I put an elbow on Shira's shoulder, and leaned on it. "Plus, who knows maybe our SF guests would wanna drink too. Probably been awhile for them also."
"All I know is I'm not gonna let this ruin my plans. Just you wait." Luca said as he picked his personal b
... keep reading on reddit ➡I'm surprised it hasn't decade.
For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.
I said "hey look, an escaPEA"
No one near me but it didn't half make me laugh for a good hour or so!
Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂
It really does, I swear!
Because she wanted to see the task manager.
Heard they've been doing some shady business.
They’re on standbi
There is not much information on this online, but the G1000 (and other systems) calculate wind speed in direction the same way a e6b would, using your true airspeed, ground speed, true course, and magnetic heading. Given this, my theory is that it can only do so in coordinated flight. Think about doing a forward slip, your heading is so far in one direction but your ground track is unchanged. Your PFD is probably not taking the slip into the equation. It would be really cool if it could somehow account for a slip or skid. I haven’t tried it yet but i think i will give it a shot this weekend.
Nothing, he was gladiator.
So, I was just curious if there was a quick reference sheet that compared like, total orbital radius when you have the autopilot on in say the F/A-18, and then you hold altitude while giving it a fixed roll angle at a given reference air speed (or maybe it doesn't make THAT much difference how fast you're going... I just assume it would).
I just wanted to be able to have a quick rule of thumb for how far over to roll if I was traveling abeam of my target at say, ~8-10km out, and wanted to establish a 10 km radius orbit so that i could circle the target easily while fiddling with tpod or whatever. or maybe just circle an air strip or as a loitering defensive deal over a ship, etc...
cheers
Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.
This sub is mostly just NSFW puns now.
If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.
Edit* I'm not replying any longer and turning off notifications but to all those that say "no one cares", there sure are a lot of you arguing about it. Maybe I'm wrong but you people don't need to be rude about it. If you really don't care, don't comment.
What did 0 say to 8 ?
" Nice Belt "
So What did 3 say to 8 ?
" Hey, you two stop making out "
I won't be doing that today!
Never had this issue before and now I'm encountering it in several planes. The True Airspeed (TAS) is still operating but the indicator above remains frozen in one position. Pretty important piece of equipment I can't seem to depend on anymore.
Where ever you left it 🤷♀️🤭
This morning, my 4 year old daughter.
Daughter: I'm hungry
Me: nerves building, smile widening
Me: Hi hungry, I'm dad.
She had no idea what was going on but I finally did it.
Thank you all for listening.
I have test data for the power generated by a wind turbine at 45m/s airspeed, at sea level. I want to extrapolate this to 100KEAS at 10,000ft (project requirement).
I can obtain the turbine efficiency from a re-arranged turbine equation. Then using the new air density (0.92) and airspeed I can find out estimate for the power generated by the same turbine at 100KEAS and 10,000ft.
My question is, do I use 100KEAS in m/s (51.4m/s), or convert 100KEAS to the True Airspeed (59m/s) and use that, in the turbine equation.
Due to the cube term in the turbine power equation these have a big impact, so want to be sure.
Thanks for any guidance!
Pilot on me!!
When I got home, they were still there.
