RunRyder RC
WATCH
 4 pages [ <<    <     1      2     ( 3 )     4     NEXT    >> ] 8070 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Why real heli do not have flybar
04-12-2014 11:49 PM  4 years agoPost 41
teamdavey2001

rrApprentice

Sunnyvale, California, USA

My Posts: All  Forum  Topic

Knock yourselves out:

http://www.aviastar.org/helicopters_eng/lok_xh-51.php

Four blades and a four arm flybar

The "flybar" was a mechanical gyro that controlled blade cyclic pitch - it was acted on by the pilot via some clever spring packs to control the helo.

PM  EMAIL  Attn:RR  Quote
04-13-2014 04:32 AM  4 years agoPost 42
UH-60PILOT

rrVeteran

Seoul, South Korea

My Posts: All  Forum  Topic

AirWolfRC, you said:
"semi-rigid" and "fully articulated" doesn't really clarify much unless you're already long in the business.
. . . and that's my point.
So, in your original comment you meant to ask:
You want a question?
(I don’t think anyone was soliciting a question that would take this discussion in some unrelated direction you wanted to take it in but, ok, I read it and you have to expect to get replies on inaccuracies in your posts) but maybe I'm wrong so I digress.
Why is there a (I think you meant to us an instead of a here) up-side-down airfoil on the tail boom producing down force on helis with a tetering (sp? teetering) head?

And a right-side-up airfoil producing up force on a teetering rotor head?
Do I have that right? Please clarify. Thanks.

Kenny Thompson

PM  EMAIL  GALLERY  Attn:RR  Quote
04-13-2014 05:09 PM  4 years agoPost 43
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

I read it and you have to expect to get replies on inaccuracies in your posts
Yes . . . I did expect replys.
No . . . I didn't expect nit picking.

Is that clear enough ?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-13-2014 05:24 PM  4 years agoPost 44
Trexwilly

rrVeteran

FL USA

My Posts: All  Forum  Topic

Some serious panty bunching going on here...

PM  EMAIL  GALLERY  Attn:RR  Quote
04-13-2014 06:25 PM  4 years agoPost 45
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

When the people on this list start attending Navy helo flight school,
. . . I'll give you that argument.
I did. However, I guess the very people who will be defending our nation in the future aren't relevant to you because you think they don't fly toy helicopters, huh?

And, if you're going to attempt, even incorrectly, to discuss a technical topic, please not only try to get the concepts right but also the terminology. Believe it or not, that last part actually matters.

PM  EMAIL  Attn:RR  Quote
04-13-2014 09:47 PM  4 years agoPost 46
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

Back in the day I spent my years keeping the helis in the air, specifically the CH53D's. The pilots, the guys who do the "yanking and banking" can't do the job without people like me. So you can keep your comments to yourself.

The point here was, and still is, that most people on this list don't have the definitions down pat like the "elite" few like you do.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-13-2014 11:19 PM  4 years agoPost 47
UH-60PILOT

rrVeteran

Seoul, South Korea

My Posts: All  Forum  Topic

AirWolfRC, You said:
Back in the day I spent my years keeping the helis in the air, specifically the CH53D's. The pilots, the guys who do the "yanking and banking" can't do the job without people like me. So you can keep your comments to yourself.
My reply: Before I was a pilot I was also a UH-60 helicopter mechanic so you're not in any position to play the high and mighty underdog card on me but thanks for trying.

You also said:
The point here was, and still is, that most people on this list don't have the definitions down pat like the "elite" few like you do.
I've been flying RC helis since I was 11 years old (34 years now) and within the first months of learning to fly I knew the difference between semi-rigid/teetered, articulated and rigid rotor systems. So, the point I'm making is that you are wrongfully assuming that most of the people reading this forum are un-educated about helicopters which ironically enough is a very elitist attitude you are displaying. I think most of the people here are a lot more "with it" than you give them credit for.

Kenny Thompson

PM  EMAIL  GALLERY  Attn:RR  Quote
04-13-2014 11:40 PM  4 years agoPost 48
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

The point here was, and still is, that most people on this list don't have the definitions down pat
Quite obviously.

PM  EMAIL  Attn:RR  Quote
04-13-2014 11:43 PM  4 years agoPost 49
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

Before I was a pilot I was also a UH-60 helicopter mechanic so you're not in any position to play the high and mighty underdog card on me but thanks for trying.
And, without us, he'd be irrelevant and wouldn't have a job. Even UAVs still have maintainers and "pilots", aka operators. I flew SH-60s in the Navy, by the way.

PM  EMAIL  Attn:RR  Quote
04-14-2014 12:15 AM  4 years agoPost 50
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

Neither of you two have provided much of anything useful to this thread.
It's been a while since I've added anyone to my Ignore list but you two have just been "promoted".

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-14-2014 12:34 AM  4 years agoPost 51
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

Sweet, dude. Like that's some big loss or anything.

PM  EMAIL  Attn:RR  Quote
04-14-2014 12:42 AM  4 years agoPost 52
revmix

rrKey Veteran

NJ

My Posts: All  Forum  Topic

r/c heli can fly [as the full scale] without FlyBar (2 bladed) or electronic FBL unit with low head-speed & flapping 'floating' grips, only tail gyro.
culprit is the ratio between the swash rotating-star small circle & wide grip-arm large circle [also servo travel, DR & Expo, servo arm length].
smoother & slower tilting of the tip path plane [unlike rigid setup 3D].
notice the drooping blades [450 & 600 flapping grips].

450
600

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 03:04 AM  4 years agoPost 53
UH-60PILOT

rrVeteran

Seoul, South Korea

My Posts: All  Forum  Topic

Wooo hoooo! By the powers vested in AirWolfRC I've been promoted fellas!
Neither of you two have provided much of anything useful to this thread.
It's been a while since I've added anyone to my Ignore list but you two have just been "promoted".

Kenny Thompson

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 05:13 AM  4 years agoPost 54
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

LOL

PM  EMAIL  Attn:RR  Quote
04-14-2014 03:55 PM  4 years agoPost 55
revmix

rrKey Veteran

NJ

My Posts: All  Forum  Topic

LOL
for all related posts

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 05:31 PM  4 years agoPost 56
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

Hey guys... this started out as a great topic that I found interesting. Lets not let it creep into name calling and banning.

I really want to do a 4 or 5 bladed scale heli some time. I am not really thinking of going without a FBL device.

Previous pictures showed "flapping hinges" -- I just don't see it. Could someone splain it to me.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 07:25 PM  4 years agoPost 57
revmix

rrKey Veteran

NJ

My Posts: All  Forum  Topic

"flapping hinges"
it's a crude design, simple through-bolts on the spindles, slightly visible on the 6th pic; near the base of main-head at about 4 & 6 o'clock position behind grip-arms

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 08:29 PM  4 years agoPost 58
HeimD

rrVeteran

the great southwest

My Posts: All  Forum  Topic

The old Kyosho Concepts had flapping hinges on a two bladed head instead of the feathering spindle design. It made for a nice stable hover and smooth forward flight but cyclic response was very mushy. You had to run super high head speeds (for the time) to crisp up the cyclic for anything remotely aggressive. Boom strike city, too, with a hard landing.

PM  EMAIL  Attn:RR  Quote
04-14-2014 09:46 PM  4 years agoPost 59
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

OK... I think that I see it better in picture 5... bolt through the grip.

How much movement does this allow? are we talking inches at the end of the blade?

PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2014 10:20 PM  4 years agoPost 60
AirWolfRC

rrProfessor

42½ N, 83½ W

My Posts: All  Forum  Topic

Ideally, flapping hinges aren't needed if the cyclic can produce the necessary Angle of Attack on the blades to keep the lift of each blade even throughout it's rotation at different forward speeds. Flapping helps when the cyclic can't keep up by allowing the blade to "fly up" as it becomes the "advancing blade" in forward flight.

Then the only need for "flapping" is to accommodate varying cone angles on the main rotor disk.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 4 pages [ <<    <     1      2     ( 3 )     4     NEXT    >> ] 8070 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Why real heli do not have flybar
 Print TOPIC  Make Suggestion 

 12  Topic Subscribe

Saturday, October 20 - 7:39 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online