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Search: Posts Made By: Kyrilian
Showing results 1 to 35 of 44
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Forum: Rotorheads
16th Aug 2012, 20:34
Replies: 9
Views: 2,650
Posted By Kyrilian

How about one of the small in-ear headsets, like...

How about one of the small in-ear headsets, like Halo or Clarity Aloft? You'll still have to carry both, but at least the 'headset' will be small.
Forum: Rotorheads
22nd Dec 2007, 00:06
Replies: 2,002
Views: 664,636
Posted By Kyrilian

H-92 FBW First Flight!

Sikorsky Aircraft Helicopter with Fly-by-Wire Technology Completes Flawless First Flight

STRATFORD, Conn., Dec. 21 /PRNewswire/ -- The first H-92® helicopter to feature fly-by-wire technology has...
Forum: Rotorheads
23rd Aug 2005, 20:50
Replies: 2,002
Views: 664,636
Posted By Kyrilian

zebedee I'll bite.. You say that I fly...

zebedee
I'll bite..

You say that I fly 92`s has given credence to what you said, including your suggestions that the crew was about to ditch and that things could have been catastrophic. Where...
Forum: Rotorheads
23rd Aug 2005, 20:50
Replies: 601
Views: 79,057
Posted By Kyrilian

zebedee I'll bite.. You say that I fly...

zebedee
I'll bite..

You say that I fly 92`s has given credence to what you said, including your suggestions that the crew was about to ditch and that things could have been catastrophic. Where...
Forum: Rotorheads
20th Jan 2005, 19:19
Replies: 10
Views: 1,358
Posted By Kyrilian

slowrotor I think what you'll find is that for...

slowrotor
I think what you'll find is that for the most part VTOL programs (as shown on the 'wheel' failed due to three related reasons:
Performance
Controllability
Complexity

oh, and of...
Forum: Rotorheads
17th Jan 2005, 21:53
Replies: 8
Views: 1,903
Posted By Kyrilian

SASless, A very well stated question! ;) ...

SASless,
A very well stated question! ;)

As I see it, there is no old and new. The first rotors ever flown acted in extremely complex ways, ways I'm certain were not fully understood at the...
Forum: Rotorheads
17th Jan 2005, 20:34
Replies: 191
Views: 41,314
Posted By Kyrilian

Lu, A small device like you describe is...

Lu,
A small device like you describe is impacted mostly by its dynamic characteristics, so it really isn't acting like a larger rotor. A propeller is also more affected by inertia and less by aero...
Forum: Rotorheads
17th Jan 2005, 19:46
Replies: 191
Views: 41,314
Posted By Kyrilian

Lu, "...which one it is"??? Nick is...

Lu,
"...which one it is"???

Nick is correct--it is not either/or. Gyroscopic infers only inertial effects, while aerodynamic infers only aerodynamic effects. The rotor is affected by both the...
Forum: Rotorheads
14th Jan 2005, 16:43
Replies: 191
Views: 41,314
Posted By Kyrilian

Sorry to bring this up once again, but I think...

Sorry to bring this up once again, but I think this myth deserves to be on the list:

"All teetering rotor blades (all rotors for that matter) respond 90degrees after their input"

I don't mean...
Forum: Rotorheads
10th Jan 2005, 15:59
Replies: 1,983
Views: 215,416
Posted By Kyrilian

the coyote writes: "And yes, I'm as concerned...

the coyote writes:
"And yes, I'm as concerned as you are that someone might take this speculation on board somehow and in confusion deviate from what they have been trained to do when the blood is...
Forum: Rotorheads
10th Jan 2005, 15:59
Replies: 2,217
Views: 300,990
Posted By Kyrilian

the coyote writes: "And yes, I'm as concerned...

the coyote writes:
"And yes, I'm as concerned as you are that someone might take this speculation on board somehow and in confusion deviate from what they have been trained to do when the blood is...
Forum: Rotorheads
8th Jan 2005, 20:26
Replies: 1,983
Views: 215,416
Posted By Kyrilian

Gaseous, You say "If you've got the lever down...

Gaseous,
You say "If you've got the lever down and your Nr is still decaying you should come back and haunt your engineer! (or mechanic if you live in USofA). Helicopters should be trimmed to...
Forum: Rotorheads
8th Jan 2005, 20:26
Replies: 2,217
Views: 300,990
Posted By Kyrilian

Gaseous, You say "If you've got the lever down...

Gaseous,
You say "If you've got the lever down and your Nr is still decaying you should come back and haunt your engineer! (or mechanic if you live in USofA). Helicopters should be trimmed to...
Forum: Rotorheads
7th Jan 2005, 20:53
Replies: 1,983
Views: 215,416
Posted By Kyrilian

Gaseous, I am not suggesting aggressively...

Gaseous,
I am not suggesting aggressively pulling back. My advice was aimed more at what to do if you've got the collective fully down and your NR is decaying still--not dangerously low 'yet', but...
Forum: Rotorheads
7th Jan 2005, 20:53
Replies: 2,217
Views: 300,990
Posted By Kyrilian

Gaseous, I am not suggesting aggressively...

Gaseous,
I am not suggesting aggressively pulling back. My advice was aimed more at what to do if you've got the collective fully down and your NR is decaying still--not dangerously low 'yet', but...
Forum: Rotorheads
5th Jan 2005, 20:44
Replies: 1,983
Views: 215,416
Posted By Kyrilian

Turn!

zxcvbn,
Regarding keeping NR up when low GW; consider what happens when you flare or turn. As load factor increases NR climbs. If you've done any 180 autos you'll recall that you had to pull in...
Forum: Rotorheads
5th Jan 2005, 20:44
Replies: 2,217
Views: 300,990
Posted By Kyrilian

Turn!

zxcvbn,
Regarding keeping NR up when low GW; consider what happens when you flare or turn. As load factor increases NR climbs. If you've done any 180 autos you'll recall that you had to pull in...
Forum: Rotorheads
20th Oct 2002, 05:28
Replies: 15
Views: 4,242
Posted By Kyrilian

Dave, As many have pointed out, symmetry is not...

Dave,
As many have pointed out, symmetry is not always the answer. People aren't really symmetrical, neither are cars or planes. Only race cars put the driver in the center, and even then the guts...
Forum: Rotorheads
11th Sep 2002, 03:48
Replies: 123
Views: 19,978
Posted By Kyrilian

Steve76 Regardless of the specific incident...

Steve76
Regardless of the specific incident that brought this dicussion to light, it would seem from the "evidence" presented, that this pilot's overall attitude towards flight safety was/is...
Forum: Rotorheads
10th Sep 2002, 15:29
Replies: 21
Views: 2,254
Posted By Kyrilian

wiser :)

wiser :)
Forum: Rotorheads
10th Sep 2002, 02:35
Replies: 21
Views: 2,254
Posted By Kyrilian

When I told your other apprentice that I'd posted...

When I told your other apprentice that I'd posted this he said this may be a record for the shortest career here! I hope not! ;)

Washuta found it and showed it to us 'younger folk', though...
Forum: Rotorheads
9th Sep 2002, 03:19
Replies: 21
Views: 2,254
Posted By Kyrilian

Cool Nick, Is that with a 'symmetric fuel load'? :D ...

Nick,
Is that with a 'symmetric fuel load'? :D
Couldn't resist!
Just watched a piece on the 76 going to 1.11Vne last week. Cool stuff
Forum: Rotorheads
5th Dec 2001, 22:53
Replies: 70
Views: 6,165
Posted By Kyrilian

Post Grey Area, "1. What formula are you using?" ...

Grey Area,

"1. What formula are you using?"

nu^2 = 1 + (3/2)*(e/(1-e)) the non-dimensionalized natural frequency (omega_n/Omega)

delta_psi = -atan(nu^2 - 1)/(gamma/8)

for small angles...
Forum: Rotorheads
5th Dec 2001, 04:11
Replies: 15
Views: 733
Posted By Kyrilian

Post MaxNg, Isn't a free turbine where N1 is the gas...

MaxNg,
Isn't a free turbine where N1 is the gas generator speed? In that case the generator speed (N2) could be less than the rotor rpm% (Nr) while the power turbine (N2) could be in mesh with...
Forum: Rotorheads
5th Dec 2001, 02:35
Replies: 70
Views: 6,165
Posted By Kyrilian

Post Grey Area, Don't forget that d-3 also affects...

Grey Area,
Don't forget that d-3 also affects phase lag...

"It varies with air density EXCEPT for 2 Bladed teetering heads, where it sticks at 90 degrees)."

The Robinson is an example where...
Forum: Rotorheads
3rd Dec 2001, 22:48
Replies: 19
Views: 715
Posted By Kyrilian

Cool Just to stir it up a bit :D 2.5.2.4.0.A.1 ...

Just to stir it up a bit :D

2.5.2.4.0.A.1
Coning is caused by the combined forces of
a. lift and centrifugal force.
b. flapping and centrifugal force.
c. drag, weight, and translational lift....
Forum: Rotorheads
1st Dec 2001, 00:11
Replies: 70
Views: 6,165
Posted By Kyrilian

Post heedm, I find Leishman's book to be...

heedm,
I find Leishman's book to be excellent--it's my personal favorite. It is a bit expensive, but no more so than some of the others ($US95 from B&N I think). It doesn't cover _all_ the...
Forum: Rotorheads
22nd Nov 2001, 06:52
Replies: 358
Views: 66,061
Posted By Kyrilian

Post Thanks TC! Somehow I didn't think of that. I...

Thanks TC! Somehow I didn't think of that. I remember some old threads but didn't recall them mentioning differences between turbine and piston (and I didn't feel like clicking back and trying to...
Forum: Rotorheads
22nd Nov 2001, 06:46
Replies: 2,217
Views: 300,990
Posted By Kyrilian

Post Lu, 'Round and round we go :) "Please...

Lu,
'Round and round we go :)

"Please read the R-22 / R-44 POHs as they indicate that certain flight maneuvers or the incorrect response to zero G can lead to excessive flapping and the blades...
Forum: Rotorheads
22nd Nov 2001, 06:46
Replies: 1,983
Views: 215,416
Posted By Kyrilian

Post Lu, 'Round and round we go :) "Please...

Lu,
'Round and round we go :)

"Please read the R-22 / R-44 POHs as they indicate that certain flight maneuvers or the incorrect response to zero G can lead to excessive flapping and the blades...
Forum: Rotorheads
22nd Nov 2001, 05:22
Replies: 358
Views: 66,061
Posted By Kyrilian

Post I'm also interested. I've been using a non-ANR...

I'm also interested. I've been using a non-ANR David Clark and it simply clamps too much for my preference. I'm thinking of getting the Bose as I will have the opportunity to get it at a discount...
Forum: Rotorheads
21st Nov 2001, 03:02
Replies: 2,217
Views: 300,990
Posted By Kyrilian

Post SouthXross, For most intents and purposes, as I...

SouthXross,
For most intents and purposes, as I understand, the primary dynamics occur around the primary (center) hinge, while the coning hinges provide slight unloading of what would otherwise be...
Forum: Rotorheads
21st Nov 2001, 03:02
Replies: 1,983
Views: 215,416
Posted By Kyrilian

Post SouthXross, For most intents and purposes, as I...

SouthXross,
For most intents and purposes, as I understand, the primary dynamics occur around the primary (center) hinge, while the coning hinges provide slight unloading of what would otherwise be...
Forum: Rotorheads
21st Nov 2001, 02:45
Replies: 267
Views: 46,850
Posted By Kyrilian

Cool Dave, Perhaps you need a quantitative way to...

Dave,
Perhaps you need a quantitative way to describe your definitioin of 'relative'. How about the Lock number (gamma = rho*c*cla*R^4/Ib where rho is density, c is chord, cla is the lift curve...
Forum: Rotorheads
6th Nov 2001, 09:26
Replies: 181
Views: 28,363
Posted By Kyrilian

Post Vortex what? Thanks for starting this thread. ...

Vortex what?
Thanks for starting this thread. I too am interested in taking the course at some point. Seems like one must really plan ahead! :) For the moment I'm going to respond to the...
Showing results 1 to 35 of 44
 
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