RunRyder RC
 5  Topic Subscribe
WATCH
 1 page 720 views
HelicopterScale Model RC Helicopters › Leading or trailing edge on mulit-blade heads
10-21-2015 02:42 AM  26 months agoPost 1
trekrider586

rrVeteran

Sylacauga,Al

My Posts: All  Forum  Topic

Hi all,
I have searched this topic, and would like to get some more info.
I am setting up R\C Aerodyne 4 blade head on my Agusta 119
and am wondering what way to set it up.
Specs :
TT Agusta 119
Raptor e550 stretched
Mini V bar.

I know some brands have either, so wanting to know who's doing what and if it flies better one way or the other.

it's better to ask for forgiveness than for permission

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 03:06 AM  26 months agoPost 2
marc28

rrVeteran

new york

My Posts: All  Forum  Topic

Leading edge

East Coast scale helicopter Field Rep
Vario Team Pilot

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 03:15 AM  26 months agoPost 3
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

Why wouldn't someone have the blades rotating with the leading edge??? I am about to start a scale bird and this is new to me also. ( I hope this is not seen as highjacking your thread).

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 09:25 AM  26 months agoPost 4
Andy01

rrApprentice

Brisbane, Australia

My Posts: All  Forum  Topic

Since it is pretty obvious that the actual blades have to rotate leading edge first (I have tried one the other way, and it didn't work too well ), I am assuming that the question was referring to leading or trailing edge control ?

If so, IMO leading edge is better.

Colin

Vario Long Ranger 700e
Seahawk 600
UH-1N 500
Baumann EC-145 800+ (coming soon )

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 11:43 AM  26 months agoPost 5
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

The minute you change from leading edge to trailing edge, your phasing must change as well. If not, it is not phased properly.
Joe

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 12:34 PM  26 months agoPost 6
garyl

rrVeteran

taxachussetts

My Posts: All  Forum  Topic

I have setup a vario cobra with both leading and trailing edge control and it flew the same either way. The only difference is the swash will be reversed for positive pitch using trailing edge control, it will go down for positive pitch.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 01:24 PM  26 months agoPost 7
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

I am assuming that the question was referring to leading or trailing edge control ?
Dough!!! Now I feel like a total dork!

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 05:17 PM  26 months agoPost 8
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

The phasing change is only for 3,4 5,or 6 blade heads, since two blade heads need no phasing.
Joe

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 05:51 PM  26 months agoPost 9
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

My Posts: All  Forum  Topic

I have setup a vario cobra with both leading and trailing edge control and it flew the same either way. The only difference is the swash will be reversed for positive pitch using trailing edge control, it will go down for positive pitch.
clearly the question was not made clearly. I believe its being refered to the pitch control arm on the blade grip in reference to the direction of rotation.
GaryL you hit it rigtht on the money. I prefer the swash to go up with positive pitch being achieved than the other way round. either way it shouldn't matter to how it feels or flies.
Now, I thought the rca heads came withthat arm that automatically phases the head?? it should be no issue at all.

drive a rotary, fly a rotorcraft

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-21-2015 06:13 PM  26 months agoPost 10
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

Swashplate direction becomes an issue, for instance, with a Vario head, left hand rotation, leading edge control;
Swashplate tilts forward and to the right for forward cyclic.
If the control is on the trailing edge, forward cyclic has the swashplate going forward and to the left instead.
So its more than just an arm controlling the phasing if you move it. If its made one way, for one direction and not needing phasing, thats something different altogether.
Joe

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 07:07 PM  26 months agoPost 11
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

My Posts: All  Forum  Topic

Joe is correct. Phasing for either way is different. I think its simpler and less taxing in the Brain to have the grip control arm positioned in the direction if rotation

drive a rotary, fly a rotorcraft

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-21-2015 07:46 PM  26 months agoPost 12
trekrider586

rrVeteran

Sylacauga,Al

My Posts: All  Forum  Topic

Thanks for all the answers guys.
The head in question is the Rodan 4 blade from R/C Aerodyne.

it's better to ask for forgiveness than for permission

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 07:53 PM  26 months agoPost 13
trekrider586

rrVeteran

Sylacauga,Al

My Posts: All  Forum  Topic

See how I have it? Was wondering if that was the correct way. I was thinking that is the way it was supposed to be. What confused me is that 3 out of the 4 blade grips had the blade bolts inverted,(nut at top) and got to thinking about it when I flipped the grips over and saw it could work that way as well. As far as the phasing is concerned, I have the head located with the jesus bolt so that the blade grips are lined up with the swash balls.

it's better to ask for forgiveness than for permission

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2015 08:36 PM  26 months agoPost 14
don s

rrElite Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

As long as it phases properly it won't matter for a scale application.

Your picture looks fine.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2015 10:19 AM  26 months agoPost 15
Andy01

rrApprentice

Brisbane, Australia

My Posts: All  Forum  Topic

The photo looks OK if it is CW / RH rotation for leading edge control, but if it is CCW / LH rotation, then it should probably be the other way.

It seems a bit odd to have the bolt at the bottom and countersunk nut at the top. You would probably need a standard L-shaped hex key rather than a hex driver because you may not have space between the fuselage and the grip.

Colin

Vario Long Ranger 700e
Seahawk 600
UH-1N 500
Baumann EC-145 800+ (coming soon )

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2015 02:17 PM  26 months agoPost 16
trekrider586

rrVeteran

Sylacauga,Al

My Posts: All  Forum  Topic

Thanks guys, Emile, Joe, Don s, Colin, Garyl, Marc28, Grim.
I am going to use the blade bolts as we would normally do, nut at bottom. The grip has the nut hex on both sides, and I would just think it would work and look better the "normal" way.
Colin, I am also going with the RH rotation so we should be good with the setup.

When I get off work today, we will put it back together and see how it flies.

it's better to ask for forgiveness than for permission

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2015 09:46 PM  25 months agoPost 17
trekrider586

rrVeteran

Sylacauga,Al

My Posts: All  Forum  Topic

Update

well, still haven't a chance to fly. I was having a little play in the links on the swash, so I got the bright idea of changing the balls out...well, 70 bucks later and waiting for the parts to come in.
Upon taking the balls out they broke off in the swash, I intend to try and drill, but ordered a new assembly anyway.

it's better to ask for forgiveness than for permission

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2015 11:36 PM  25 months agoPost 18
Heli Fanatix

rrVeteran

Fountain Valley, CA

My Posts: All  Forum  Topic

99% of the RC Heli are CW and the other 1% CCW are for scale. Unless you are a die hard scale builder ... stick to the conventional CW rotation with leading edge. they all fly the same once properly setup.

That head from RC Aerodyne are really nice and have the phasing built in. No adjustingment needed. Go for leading edge with the orientation of your main rotor grip arms are shown on the your image.

Once done, put mutli-color tape and track one by one. I suggest a 2000 HS(assuming 600mm baldes... maybe 1600 for 690's) with -3/+8 collective to get a good feel of hose the heli flies b/4 dropping the HS any further. The cyclic are quite reactive. I would rather tune the agility instead of adding expo.

- Scott

PM  EMAIL  GALLERY  Attn:RR  Quote
10-28-2015 09:50 AM  25 months agoPost 19
Andy01

rrApprentice

Brisbane, Australia

My Posts: All  Forum  Topic

2000rpm for a 4 blade scale heli

Sorry, but I have to disagree. 1350 to 1400rpm is fine for a 4x 600 scale heli unless the OP plans to do stunts with it.

Colin

Vario Long Ranger 700e
Seahawk 600
UH-1N 500
Baumann EC-145 800+ (coming soon )

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 720 views
HelicopterScale Model RC Helicopters › Leading or trailing edge on mulit-blade heads
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Thursday, December 14 - 9:03 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online