Wątek: DCS: UH-1H model lotu

[Sundowner]

No nad FM to muszą jeszcze nieco popracować.

"Oni", czy Ty ? 

[mmaruda]

Sami przyznają, że FM jeszcze pracy wymaga, więc będzie jeszcze lepiej.

[Sundowner]

Lepiej - tak. Łatwiej - niekoniecznie.

[YoYo]

Pozyjemy zobaczymy, na razie za bardzo telepie. W sumie juz laduje, ale na lotnisku, na dachu to mi sie nie udalo. Wlasciwe daje rade, ale przy nim to Ka-50 szoruje jak tramwaj po szynach. Te roznice sa za duze. Nie raz widzialem ladujaca 412 i jakos nie zauwazylem by w miare podobnym smiglowcem tak chwialo. Manson rowniez nie pisal by za szczegolnie walczyl z maszyna, a raczej jej ufal. Tu na razie walka ale i pewnie wyczucie co przyjdzie z czasem. Zmienilem tez nieliniowosc na kontrolerach.

[Sundowner]

To teraz wróć w książce Masona do rozdziału w którym opisuje swoje pierwsze loty na TH-23, szczególnie zawis   
Telepie, bo nie masz żadnych systemów stabilizacji, ani żadnych innych zmysłów prócz wzroku.

"Okay, See that tree out there?" The orientation instructor's
gravelly voice hissed in my earphones. I was finally getting my chance. The instructor
held the H-23 Hiller trainer in a hover in the middle of a ten-acre field.
"Yes, sir," I said, squeezing the intercom switch on the cyclic stick.
"Well, I'm gonna take care of the rest of the controls, and all I want you to do is to keep
this bird pointed in the direction of that tree." He jutted his chin forward. I nodded. "You
got that?"
"Yes, sir." My senses were overwhelmed by the clamor and bouncing and vibrations of
the H-23. The blades whirled crazily overhead; parts studied in ground school in static
drawings now spun relentlessly and vibrated, powered by the roaring, growling engine
behind my back. All the parts wanted to go their own way, but somehow the instructor
was controlling them, averaging their various motions into a position three feet above the
grass. We floated above the ground, gently rising and falling on an invisible sea. "Okay,
you've got it," my instructor said. I pushed first one and then the other of the spongy
pedals, trying to turn the machine while the instructor controlled the cyclic and collective.
All I had to do was point the helicopter at the tree. The tree swung wildly one way and
then the other. "You see the tree I'm talking about?"
"Yes, sir."
"Well, try to keep us pointed that way, if you don't mind." This instructor, like all the IP
in the primary phase of instruction, was a civilian who'd been in the military. The fact
that they were now civilians did not cramp their cynical teaching style. I concentrated
even harder. What could be wrong with me? I already knew how to fly airplanes. I
thoroughly understood the theory of controlling helicopters. I knew what the controls
did. Why couldn't I keep that goddamn tree in front of us? Swinging back and forth in
narrowing arcs, learning to anticipate the mushy response in the pedals, I finally
succeeded in keeping the tree in front of us most of the time, plus or minus twenty
degrees anyway.
"Not bad."
"Thank you, sir."
"Now that you have got the pedals down nice and good like you do, maybe we ought to
show you how this collective-pitch stick works."
"Okay, sir."
"What I'm going to do is to take all the controls again"-the IP put his feet back on the
pedals, and the tree immediately popped to a stable position dead ahead of us-"and then
let you try your luck with the collective. Just the collective. Try to keep us about this high
off the ground. Okay?"
"Yes, sir."
"You got it." This phrase always preceded the transfer of control.
"I've got it." The moment I grabbed the collective stick in my left hand, the helicopter,
the same helicopter that had been sitting placidly at three feet, lurched to five feet. It
seemed to push itself up. I pushed down too hard to correct. We strained up against the
harnesses as the ship dropped. I panicked and over-controlled again as the ground rushed
up. I pulled up too hard, causing us to pop back up to six or seven feet.
"About three feet would be fine."
"Yes, sir." Sweat dripped off me as I fought to achieve a stable altitude above the ground.
It wasn't a matter of just putting the collective in one position and leaving it there;
constant corrections had to be made. After a few minutes of yo-yo-ing up and down I was
able to keep the machine about where the IP wanted it.
"That's real good. You're a natural, kid."
"Thank you, sir."
"I've got it." The IP took, control of the collective. "One small thing you're going to have
to know is that when you pull up with the collective, that takes more power, which causes
more torque, which means you have to push a little left pedal to compensate. You have to
push a little right pedal as you reduce the collective."
"Yes, sir."
"The next control we're going to try is this here cyclic stick. You don't move this one
much, see." I looked at the IP's right hand as it held the cyclic-control grip. It was moving
plenty. The top of the cyclic vibrated in agitated harmony with the shaking machine.
"It looks like it's moving a lot to me, sir."
"I didn't say it wasn't moving; I said you don't move it much. There's a difference. The H-
23 is famous for the excessive motion of its cyclic. That's the feedback from all that
unbalanced crap spinning around up there. Try it for a while. You got it."
"I got it." I put my hand on the wavering cyclic grip between my knees. I could feel
strong mechanical tremors vibrating in many directions within my white-knuckled grasp.
The IP had the rest of the controls. The H-23 held its position for a few seconds and then
began drifting off to the left. I pushed the tugging grip to the right to correct. Nothing
seemed to happen. We still drifted left. I moved the grip farther to the right. The ship then
stopped its leftward drift, but instead of staying stable, like I thought it would, it leaned
over- to the right and drifted in that direction. It felt like there was no direct control of the
machine. I pulled the cyclic back to the left quickly, to correct, but the machine continued
to the right. The helicopter was taking on a personality, a stubborn personality. Whoa, I
thought to the machine turned beast. Whoa, goddamn it. I increased pressure away from
its drifting, and once again it halted, seemingly under control, and then drifted off in
another direction. "I would like it better if you kept the helicopter over one spot or
another that we both know about, if you, don't mind."
"Yes, sir." After a series of hesitating lurches in many different directions, I finally
caught on to the control delay in the cyclic. After five minutes of sweaty concentration I
was able to keep it within a ten-foot square.
"Well, you got it now, ace."
"Thank you, sir."
"Next thing to do, now that you've got the cyclic down, is to let you try all the controls at
once. Think you're up to that, kid?"
"Yes, sir."
"Okay, you got it."
"I -got it." The cyclic tugged, the collective pushed, and the pedals slapped my feet, but
for a brief moment I was in complete control. I was three feet off the ground hovering in
a real helicopter. A grin was forming on my sweaty face. Whoops. The illusion of control
ended abruptly. As I concentrated on keeping us, over one spot with the cyclic, we
climbed. When I pushed the collective back down to correct, I noticed we were drifting
backward, fast. I corrected by pushing forward. Now I noticed we were facing ninety
degrees away from where we started. I corrected with the pedals. Each control fought me
independently. I forgot about having to push the left pedal when I raised the collective. I
forgot the cyclic control lag. We whirled, and grumbled in a variety of confusing
directions, attitudes and altitudes all at once. There were absolutely too many things to
control. The IP, brave man that he was, let the ship lurch and roar and spin, all over that
field while I pushed the pedals, pumped the collective, and swept the cyclic around, with
little effect. I felt like I had a handful of severed reins and a runaway team of horses
heading for a cliff: I could not keep the machine anywhere near where I wanted it.
"I got it." The IP took over the controls. The engine and rotor rpm went back to the green:
We drifted down from fifteen feet to three, pointed away from the sun and back to the
tree, and moved back to the spot where we had started. I felt totally defeated.
"Well, it's true what they say about you all right, ace."
"What's that, sir?"
"You're a natural."
"A natural? Sir, I was all over the field."
"Don't worry about it, kid. We'll just keep practicing in smaller and smaller fields."

Bell 412HP ma zdwojony cyfrowy 3-osiowy AFCS, podobnie jak w Ka-50. Jest też opcja 4-osiowego systemu używanego np. przez Kanadyjczyków w maszynach ratowniczych.

[YoYo]

Wg. tych nowych video z lekcji treningowych nawet chłopakom ładnie to wychodzi, więc możliwe, że to też kwestia wyczucia FM'u i maszyny:

http://www.youtube.com/watch?v=SoIjTYh3A-c

Na pewno jednak pierwsze zetkniecie z jego FM mocno "boli" hehehe.

[cygan]

Mam nadzieje że ewentualne zmiany będą  "kosmetyczne" bo jak napisałem wcześniej moje wrażenia ze sterowania są podobne jak z mi-2 (coś w tym musi być    ) który tez nie posiada żadnej stabilizacji jaka jest np w Mi-24 lub Ka-50. Stad właśnie pewien "szok termiczny" związany z odmiennością poziomu trudności podczas pierwszych lotów jak wspomniał zresztą Yoyo

[YoYo]

Niedługo będę jak Cygan . Na dachu już mi się udaje lądować.

[some1]

A już jesteś na etapie, kiedy możesz wybrać dach na którym wylądujesz?

[YoYo]

A już jesteś na etapie, kiedy możesz wybrać dach na którym wylądujesz?

Hehehe. Ten wybrałem.

[mmaruda]

Przez was popadam w depresję. Czy jest jakaś szansa, że ktokolwiek obeznany zrobi filmik instruktażowy z komentarzem?

[cygan]

Szkoda, że nie_ma opcji dzielenia kokpitu._Można by robić wspólne loty treningowe.

[Sundowner]

Za starych dobrych czasów Jane's Simulations, tutorial uczył latać oddając do dyspozycji jeden ster na raz - tak jak się to robi w czasie kursu pilotażu  Tutaj jesteśmy rzuceni na głęboką wodę i praktycznie nie ma co innego napisać niż - wykonuj ruchy małe i impulsowo: wracając drążkiem mniej-więcej do pozycji sprzed dokonania korekty. Reszta to ćwiczenie.

[Corvus]

Po małym treningu jest coraz lepiej. Faktycznie duże znaczenie ma zakres ruchu joysticka. Warthog ma dość mały zakres ruchu, do tego sam drążek jest sztywny. Nie mniej jednak coraz lepiej udaje mi się kontrolować śmigłowiec- oby tak dalej:P

http://www.youtube.com/watch?v=1qkmuiYgHKE

[macieksoft]

Tak z czystej ciekawości zapytam.
Czy UH-1 lata się podobnie jak Ka-50 bez hydrauliki (i co za tym idzie stabilizacji oraz trymera)? Jest ciężej, czy nie?