PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
 
Page 1 of 2
1
2
Search: Posts Made By: Chiplight
Showing results 1 to 35 of 68
Search took 0.15 seconds.
Forum: Rotorheads
10th Mar 2007, 17:48
Replies: 12
Views: 8,062
Posted By Chiplight

My mistake. :{ I took a look at the image at ...

My mistake. :{
I took a look at the image at
http://www.b-domke.de/AviationImages/Rotorhead/G-MGWI_Kint_020509l.html
and saw the pitch flap coupling, which I had forgotten was there. Somehow I...
Forum: Rotorheads
9th Mar 2007, 22:15
Replies: 12
Views: 8,062
Posted By Chiplight

graviman, I'm not disputing that he has cleverly...

graviman, I'm not disputing that he has cleverly compensated for 1 and 2. The compensation for "wee-wa", for example, is to put in a phase offset in the controls.
This is done by rotating the...
Forum: Rotorheads
9th Mar 2007, 15:38
Replies: 12
Views: 8,062
Posted By Chiplight

Thanks. That is more or less what I was trying to...

Thanks. That is more or less what I was trying to say, but you said it better.
It would seem , then, that Frank R's description of pitch-flap coupling(posted here some time ago) is a bit misleading....
Forum: Rotorheads
8th Mar 2007, 20:42
Replies: 12
Views: 8,062
Posted By Chiplight

R22 Delta-3, I don't think so

Tail rotors have delta-3, achieved by skewing the teeter hinge at some angle.
This limits flapping. Since there is no cyclic control on a TR, phase lag in the controls is non-existent.
The R22...
Forum: Rotorheads
12th Jul 2006, 19:04
Replies: 91
Views: 11,925
Posted By Chiplight

n206 panel lighting

Here's something...

http://www.henry1.com/nvg/407_NVG_panel_0418.jpg
Forum: Rotorheads
23rd May 2005, 19:33
Replies: 20
Views: 2,754
Posted By Chiplight

Are we having fun yet? How about the...

Are we having fun yet?

How about the "entomopter"; The blade pairs tilt , or flap, intstead of rotating. Some serious research is going into this.
...
Forum: Rotorheads
23rd May 2005, 18:25
Replies: 20
Views: 2,754
Posted By Chiplight

Another stopped rotor concept: ...

Another stopped rotor concept:
http://www.seeop.com/spinwing.htm
Forum: Rotorheads
23rd May 2005, 17:44
Replies: 13
Views: 1,424
Posted By Chiplight

Peter, I think it's been tried. :D ...

Peter,
I think it's been tried. :D
http://www.rotaryforum.com/forum/attachment.php?attachmentid=5977

Its great as a leaf blower, but I've heard that it autorotates at 4000 ft/min.
Forum: Rotorheads
23rd May 2005, 03:29
Replies: 13
Views: 1,424
Posted By Chiplight

Thanks , Gaseous. :D I think I see it now. If...

Thanks , Gaseous. :D I think I see it now. If the flapping hinges are offset, such as on an Enstrom. then any difference in lift will create a force couple on the head which rotates at 1-per-rev. ...
Forum: Rotorheads
22nd May 2005, 22:25
Replies: 20
Views: 2,754
Posted By Chiplight

Wow, Dave, that is interesting. Great link....

Wow, Dave, that is interesting.

Great link. :D
Forum: Rotorheads
22nd May 2005, 22:12
Replies: 13
Views: 1,424
Posted By Chiplight

Gaseous, thanks for your comments. I...

Gaseous, thanks for your comments.


I believe that lift on the blade does not act as a cantilever unless the helicopter is still in the hangar and you are lifting it by hand.
When the rotor...
Forum: Rotorheads
22nd May 2005, 20:16
Replies: 13
Views: 1,424
Posted By Chiplight

Equal Lift across the Disk?

Blade tracking and balancing is said to involve getting equal lift on all blades. Sometimes blade track needs to be off in order to achieve perfectly matched lift.

My contention is that equal lift...
Forum: Rotorheads
22nd May 2005, 19:16
Replies: 20
Views: 2,754
Posted By Chiplight

micro heli

Something along these lines, Dave?

http://www.rcgroups.com/forums/attachment.php?attachmentid=168760

This micro-heli is using a commutator to control a motor, which, in turn controls a flybar....
Forum: Rotorheads
21st May 2005, 16:55
Replies: 20
Views: 2,754
Posted By Chiplight

Lu, I imagine that the torque pulses to the...

Lu,

I imagine that the torque pulses to the shaft are so rapid as to look like a steady torque, similar to an anti-lock brake system.
The avg value changes during a part of each cycle if a stick...
Forum: Rotorheads
21st May 2005, 13:38
Replies: 20
Views: 2,754
Posted By Chiplight

Dave, your explanation makes sense. I accept...

Dave,

your explanation makes sense. I accept the modifiction to my theory of operation. I also tend to agree that the rotor is rigid in the sense that it is not free to teeter. The link attached...
Forum: Rotorheads
20th May 2005, 22:39
Replies: 20
Views: 2,754
Posted By Chiplight

Cyclic Control by Pulsed Torque

This has got to be one of the most interesting ideas I've seen in a while.
http://www.rotaryforum.com/forum/attachment.php?attachmentid=11047

The R/C helicopter in the attached photos has no...
Forum: Rotorheads
3rd May 2005, 20:04
Replies: 7
Views: 1,334
Posted By Chiplight

Bucket Drop

--And I found some Pics of this being done in a Cessna 170. :ok:
http://www.dtlinn.com/bucketdrop.html
Forum: Rotorheads
2nd May 2005, 01:44
Replies: 5
Views: 1,598
Posted By Chiplight

A news chopper4 ship went into the Passaic River...

A news chopper4 ship went into the Passaic River in New Jersey in Dec, 1998. I believe there was video of this one , too.

http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001211X11617&key=1
Forum: Rotorheads
1st May 2005, 18:04
Replies: 50
Views: 14,395
Posted By Chiplight

Lu, this is a thread about intermeshing...

Lu,

this is a thread about intermeshing helicopters, so I'll promise to make this my only reply on the topic of R22 swashplate phasing.

You always compare a bell system to a Robinson and state...
Forum: Rotorheads
30th Apr 2005, 22:22
Replies: 50
Views: 14,395
Posted By Chiplight

Eating Crow

Isn't it delicious? :

Seriously, Dave, your humility is appreciated. If only Lu could be so open to suggestion regarding phase offset we could eliminate about a gigabyte of discussion on this...
Forum: Rotorheads
29th Apr 2005, 08:05
Replies: 50
Views: 14,395
Posted By Chiplight

Dave, My primitive thoughts on the matter...

Dave,

My primitive thoughts on the matter are this:
If the two spinning masses are on one shaft, then they cannot both be tilting in different directions. That's the point, really. Sure it takes...
Forum: Rotorheads
28th Apr 2005, 20:48
Replies: 50
Views: 14,395
Posted By Chiplight

Dave, from your website, No, I think you...

Dave, from your website,


No, I think you are incorrect in the last sentence. See my previous post above.
The angular momentum of a spinning disk is represented by a vector pointing along the...
Forum: Rotorheads
28th Apr 2005, 17:04
Replies: 50
Views: 14,395
Posted By Chiplight

Graviman, you are correct on several points; ...

Graviman,
you are correct on several points;
those are r/c choppers in the "intermeshing" photo.

Counter rotating disks(such as coaxial props on a single shaft) nullify gyroscopic precession...
Forum: Rotorheads
27th Apr 2005, 20:16
Replies: 50
Views: 14,395
Posted By Chiplight

intermeshing

My own experience with intermeshing helicopters has not been especially rewarding. :O
http://www.rotaryforum.com/forum/attachment.php?attachmentid=10372
Forum: Rotorheads
26th Apr 2005, 19:34
Replies: 39
Views: 7,588
Posted By Chiplight

turbines

Right, but an APU turbine is never going to win any awards for being a fuel miser.

I've considered it, but at $7000+, the cost isn't that much lower than the turbine, and it doesn't whine. Also, I...
Forum: Rotorheads
26th Apr 2005, 16:25
Replies: 39
Views: 7,588
Posted By Chiplight

Graviman, The turbine is de-rated to less...

Graviman,

The turbine is de-rated to less than 100 hp, which may increase the life of the wheel- I don't know. I think there are a dozen or more currently flying with this engine and it seems to...
Forum: Rotorheads
25th Apr 2005, 21:57
Replies: 39
Views: 7,588
Posted By Chiplight

Kits

The Helicycle http://helicycle.com/ is a great, turbine powered single place kit for about $35K, which includes the modified T62 Solar turbine.
I own one, but have not installed an engine yet. I...
Forum: Rotorheads
20th Apr 2005, 02:27
Replies: 2,217
Views: 300,997
Posted By Chiplight

bug, In a teetering rotor, the torque isn't...

bug,

In a teetering rotor, the torque isn't much different when the blades are fore and aft than when they are at the adv/retreating position.
Why? because the advancing blade sees higher...
Forum: Rotorheads
20th Apr 2005, 02:27
Replies: 1,983
Views: 215,439
Posted By Chiplight

bug, In a teetering rotor, the torque isn't...

bug,

In a teetering rotor, the torque isn't much different when the blades are fore and aft than when they are at the adv/retreating position.
Why? because the advancing blade sees higher...
Forum: Rotorheads
19th Apr 2005, 21:02
Replies: 2,217
Views: 300,997
Posted By Chiplight

No, there is not necessarally any lead lag force...

No, there is not necessarally any lead lag force at all in normal flight conditions.
Undersling puts the teeter hinge above the blade root, at the imaginary point where a straight line could be...
Forum: Rotorheads
19th Apr 2005, 21:02
Replies: 1,983
Views: 215,439
Posted By Chiplight

No, there is not necessarally any lead lag force...

No, there is not necessarally any lead lag force at all in normal flight conditions.
Undersling puts the teeter hinge above the blade root, at the imaginary point where a straight line could be...
Forum: Rotorheads
15th Apr 2005, 18:53
Replies: 2,217
Views: 300,997
Posted By Chiplight

Delta 3, thanks for trying to explain. I'm...

Delta 3, thanks for trying to explain.

I'm still "collating", as Ash said in the movie Aliens.
Forum: Rotorheads
15th Apr 2005, 18:53
Replies: 1,983
Views: 215,439
Posted By Chiplight

Delta 3, thanks for trying to explain. I'm...

Delta 3, thanks for trying to explain.

I'm still "collating", as Ash said in the movie Aliens.
Forum: Rotorheads
14th Apr 2005, 02:22
Replies: 2,217
Views: 300,997
Posted By Chiplight

Delta 3, I'm trying to visualize the above...

Delta 3,

I'm trying to visualize the above situation. It seems to me that in this instance, the forward cyclic is exactly neutralizing disymmetry of lift,which is another way of saying...
Forum: Rotorheads
14th Apr 2005, 02:22
Replies: 1,983
Views: 215,439
Posted By Chiplight

Delta 3, I'm trying to visualize the above...

Delta 3,

I'm trying to visualize the above situation. It seems to me that in this instance, the forward cyclic is exactly neutralizing disymmetry of lift,which is another way of saying...
Showing results 1 to 35 of 68
 
Page 1 of 2
1
2


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.