Simviation Forum - Is there anything it can't fix?

Reply #15 - Nov 27^th, 2011 at 5:33am

jetprop Offline
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i know,the westlands is easy to fly,no problems at all.
but the bell,i used to always end up spinning out of control,now i don't fly much helicopters so...
landing was never an issue,my issue was taking off and staying in the air. Cheesy

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Reply #16 - Nov 27^th, 2011 at 9:35am

Club508 Offline
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jetprop wrote on Nov 27^th, 2011 at 5:33am:

i know,the westlands is easy to fly,no problems at all.
but the bell,i used to always end up spinning out of control,now i don't fly much helicopters so...
landing was never an issue,my issue was taking off and staying in the air. Cheesy

Wow. Those are the easiest parts for me. Shocked

by the way, I think we might be starting to ramble on with each other again. PMs rember?

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Reply #17 - Nov 27^th, 2011 at 11:24am

hyperpep111 Offline
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Club508 wrote on Nov 27^th, 2011 at 9:35am:

jetprop wrote on Nov 27^th, 2011 at 5:33am:

i know,the westlands is easy to fly,no problems at all.
but the bell,i used to always end up spinning out of control,now i don't fly much helicopters so...
landing was never an issue,my issue was taking off and staying in the air. Cheesy

Wow. Those are the easiest parts for me. Shocked

by the way, I think we might be starting to ramble on with each other again. PMs rember?

I hate landing helos. It's annoying when your slowing down and adjusting the power to make it soft and it all of a sudden it shoots up Sad

Most people think that flying a plane is dangerous, except pilots because they know how easy it is.
Arguing with a pilot is like wrestling with a pig in the mud, after a while you begin to think the pig likes it.

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Reply #18 - Nov 27^th, 2011 at 12:46pm

Club508 Offline
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I like repainting aircraft!
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hyperpep111 wrote on Nov 27^th, 2011 at 11:24am:

I hate landing helos. It's annoying when your slowing down and adjusting the power to make it soft and it all of a sudden it shoots up Sad

I'll probably rant in my explanation, but if I know enough about you, you have a science and math-prone mind, so this should help. Tongue

Sorry if it doesn't come out all so clear or correct. This is just my grasp of things of how it works without doing any research or looking up anything. Tongue

Newton's 3rd Law. Every action has an equal and opposite reaction.
The rotors shoot a mass of air downwards, thus moving the rotors and the hopefully attached helicopter in the opposite direction, up.
Bernouli's 2nd Principle. Moving fluids, in this case air, have less pressure than non-moving ones.
The moving downwards air generates lift, but also a low pressure area. The surrounding higher-pressure air moves by the easiest possible path to the moving low-pressure air, which is under the rotors, producing more lift.
Newton's 1st law. A object in motion stays in motion unless acted on by an unbalanced force, and an object at rest stays at rest unless acted on by an unbalanced force.
The helicopter is hovering level and unmoving. The upward force of the air under the rotors is generating an equal upward force on the helicopter as gravity is a downward force on the helicopter.
By reducing throttle, you decrease the speed the rotors are moving at, thus forcing less air under, and less low-pressure air for the high-pressure air to replace, thus less lift. Thus, the amount of force generated is decreased, and gravity is the same, thus the helicopter moves in the same direction as the stronger force, gravity, which is downward.

Ground Effect
Newton's 3rd Law. Again, for every action, there is an eqaul and opposite reaction.
The mass of air forced downwards by the rotors hits the ground in a downward direction. Thus, since the ground hopefully does not move, the air is forced in the opposite direction with eqaul force, up, under the rotors. The force of the moving air pusihing up hits the rotors, again, forcing the rotors up even more. And since it is another moving air mass, it means it has lower pressure, so even more higher-pressure air comes in, generating even more lift.
With the combined factors of the lift already generated by the rotors and the air being forced back up, it effectively close to doubles the amount of lift generated, so if you are descending at less than half of the speed of your helicopter if it were free-falling (in air in this case instead of a vacuum), the upward force of lift generated will equal more than that of the downward force of gravity, thus your helicopter will move upwards at close to 2[(freefall speed)-(descent speed)]
To help avoid getting forced upward, do this: when you get within 1-2 rotor span(s) of the ground, start gradually reducing the throttle down by about 1/3-1/2 of your current throttle.

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Reply #19 - Dec 13^th, 2011 at 3:55pm

EVVFCX Offline
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Been there done it-well
most of it.
Pontefract, West Yorkshire

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Get a life!

By the way, how'd you figure this out anyway? To much time on your hands?

Tongue

nice one = guess somebody had to do it.

May the Mynd be with you.
So far my number of landings either passenger or pilot equal my number of takeoffs, but that is due to change

13/07/11 Passed BMFA Fixed Wing 'A' test.
FSX Gold

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Reply #20 - Dec 13^th, 2011 at 6:37pm

Club508 Offline
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I like repainting aircraft!
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EVVFCX wrote on Dec 13^th, 2011 at 3:55pm:

Get a life!
By the way, how'd you figure this out anyway? To much time on your hands?
Tongue

nice one = guess somebody had to do it.

I already have several! (In my FS) Cheesy

And no, I was and still am VERY time restricted these days. I don't tend to get more than an hour and thirty minutes these days except on weekends. Cry

And as to how I figured it out, (or atleast think I did), I just used some of the basic laws of science that I know and applied them to the situation.

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Reply #21 - Dec 14^th, 2011 at 8:42am

EVVFCX Offline
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Been there done it-well
most of it.
Pontefract, West Yorkshire

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oh dear!

I knew somebody would react to that: it's actually jrom's text: look at the bottom of his forum messages, it's in hex and I noticed it.

Guess I've too much time Grin

May the Mynd be with you.
So far my number of landings either passenger or pilot equal my number of takeoffs, but that is due to change

13/07/11 Passed BMFA Fixed Wing 'A' test.
FSX Gold

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Reply #22 - Dec 14^th, 2011 at 3:55pm

Club508 Offline
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I like repainting aircraft!
Planet Earth

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Posts: 1528

EVVFCX wrote on Dec 14^th, 2011 at 8:42am:

oh dear!

I knew somebody would react to that: it's actually jrom's text: look at the bottom of his forum messages, it's in hex and I noticed it.

Guess I've too much time Grin

I'd say we all do! Cheesy

Speaking of which, if someone tells me to get a life since I'm always ont eh computer, I always tell them this:
53:6f:20:79:6f:75:27:72:65:20:74:65:6c:6c:69:6e:67:20:4d:45:20:74:6f:20:67:65:74
:20:61:20:6c:69:66:65:3f:20:20:41:6e:64:20:79:65:74:20:68:65:72:65:20:59:4f:55:2
0:61:72:65:20:74:61:6b:69:6e:67:20:74:68:65:20:74:69:6d:65:20:74:6f:20:66:69:6e:
64:20:77:68:61:74:20:63:6f:64:65:20:49:27:6d:20:75:73:69:6e:67:20:61:6e:64:20:74
:68:65:6e:20:74:61:6b:65:20:74:68:65:20:74:69:6d:65:20:74:6f:20:74:72:61:6e:73:6
c:61:74:65:20:69:74:21:20:20:41:6e:64:20:79:6f:75:20:74:68:69:6e:6b:20:49:27:4d:
20:63:72:61:7a:79:21

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Reply #23 - Dec 14^th, 2011 at 6:32pm

expat Offline
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Sir Puma wrote on Aug 18^th, 2011 at 2:16pm:

It's some great stuff, but really, they shouldn't be using it on passenger flights unless it's the last flight and the airport it's headed to has their repair facility.

But they got a wrinkle in it. Angry

sloppy work. LOL

Hate to be the bearer of bad news, but last flights and airports with a repair facility have nothing to do with it. I have in my last shift applied a patch to the leading edge of the horizontal stabilizer to a dent. The dent was in limits, but to keep aerodynamic smoothness, I used the speed tape to build up the dent and then applied a final patch larger than the whole area. It is now has to be inspected every 10 flight hours and has been limited to the next "A" check some 400 hours down the road. It will most probably have the filler part of the tape removed and a proper epoxy filler applied at the next servicing and then...........covered with a speed tape patch until the next "C" check..........4000 hours away when the leading edge will be removed and the dent beaten out. The patch will be replaced as and when required. The fact that 186 passengers are sat on the aircraft makes absolutely no difference what so ever.
Another use, just applied sealer to the skin? One a whole, aircraft sealer takes 24 hours to cure. Time that the aircraft cannot stay on the ground. Cover it in speed tape and send it flying. Remove tape at the end on the next days flying. In fact the press tried to make a story out of nothing just recently. A Ryanair aircraft at Stansted hit the headlines because the speed tape that was applied over the aerodynamic seal after a cockpit window was changed lifted up. Headline of window held in with tape etc, no just stopping the sealer from being smeared down the side of the aircraft as it flies. It is standard practice and so written in the AMM. Screw missing from a panel or nut plate damaged, cover hole with speed tape, enter into the HIL or MDDR fix it when the parts and or time are available. Thumb latches damaged on a panel, secure panel down with speed tape. You may not like it, but fact is you can legally do it and often as a temporary repair you will find these things in the AMM telling you to do it.

Matt

PETA People Eating Tasty Animals.

B1 Boeing 737-800 and Dash8 Q-400

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