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HelicopterScale Model RC Helicopters Docs  My Roban AS350 SS 700 build
01-04-2017 11:05 PM  5 months agoPost 1
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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I bought this used from another member. Just now getting around to working on it. I got it with the intention of waiting it to match our local Eagle Med helicopter. Right now it has the "Redbull" theme on it.

I just had to add my servo's and FBL to it. I am almost ready to start programming it. Waiting for my 3 Futaba metal servo arms to show up. Will make a Pod-n-boom for it to get it dialed in.

I will check the main shaft as well as I have read they can be bad.

Here's my layout:

Skookum 720 FBL unit
Align RCM-BL700MX 510KV motor
Phoenix Ice2 HV80 ESC
Reactor HVX Voltage regulator with 3S lipo for electronics
3-Torq BL9080 cyclic servos
1-Torq BL9188 tail servo
2-Pulse 6S 4500mAh lipo's (Running 12S)
3- Zeal 690mm carbon main blades
110mm carbon tail blades

Will need help in a while. For now I'm on hold...

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-05-2017 03:58 AM  5 months agoPost 2
Heli143

Elite Veteran

Phenix City, AL

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That's a good looking fuse!
Look forward to your build.

Glad to read you will be testing the mechs in pod and boom configuration

Roy Mayoral

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01-05-2017 06:36 AM  5 months agoPost 3
goodhunting

Senior Heliman

Slovenia ... somewhere in Europe

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nice setup...
and yes... adding the servo horns may help a little...

gh

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01-07-2017 02:05 AM  5 months agoPost 4
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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Ok after reading through "Tailkiller's" post I see he went with the Century head and has great luck with it.

Well it so happens that when I bought my AS350 it also included a Century 3 blade head, but no follower. Should I just go ahead and use it, order the follower and turnbuckles? I don't want to have a lot of problems right out of the gate....

I also got some servo arms from my buddy he had. I have seen 1 person drilled holes real close to the bolt. But if I do that the center 1 will bind. I still have a new set on the way as well.

And I really would like to replace the the tail parts, control arm, slider, grips (All parts on tail shaft). And is it a good idea to replace the 1 metal gear with a plastic 1? If so which 1?

Lastly I want to do the main shaft mod. What parts do I need for it?

Thanks and sorry for any questions repeated.

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 03:12 AM  5 months agoPost 5
TailKiller

Senior Heliman

Panama City, FL

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I got a Align 700 size swash follower that had 2 radius arms and just used one arm. YES!!! use the century head.

You really need to mount the servo arm balls close to center. Mine are about 8mm from servo center to ball center.. Yes the elevator push rod will bind with one of the other servo horns... just grind or file it down until it no longer binds. The reason you need the balls so close to center is to decrease the servo throw cause a small movement with this linkage assembly equates to large movements at the head. But you'll find out..lol.

I ended up using an Align 12mm main shaft lock collar on my Goblin main shaft mod and it is working fine. But there is another way and as soon as I find the thread I'll post it to you.

As I said this thing has a lot of control surface movement and even with the servo ball mod it will more then likely need to have the servo travel tamed down. I'm at 70%. Pitch -4 +11

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 04:16 AM  5 months agoPost 6
TailKiller

Senior Heliman

Panama City, FL

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Page 3 of my thread

https://rc.runryder.com/helicopter/t803736p1/

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 04:25 PM  5 months agoPost 7
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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I was looking at the Century 3 blade head I have and it is for a 600, has 4mm root hole. Is there a set of grips I can get for it?

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 04:49 PM  5 months agoPost 8
TailKiller

Senior Heliman

Panama City, FL

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Thats the same head I have.. It will fit a 600 or 700... a 10mm or 12mm main shaft. There is a sleeve that allows you to choice size. The blade grips are 12mm root for main blades. And the blade grip bolts are correct.
Remove the collar on the bottom of the head and there should be a sleeve in there that you don't need unless it was removed before you got it. In that case it will fit 12mm shaft.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 06:34 PM  5 months agoPost 9
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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Sweet! I was able to cancel all those 700 parts and found a complete 600 tail section here.

Also ordered the Lunsford 3mm turnbuckles. Will the eyelids from the Roban work on these or do I need new 1's?

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 07:06 PM  5 months agoPost 10
TailKiller

Senior Heliman

Panama City, FL

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Thats where it get tricky... The 700 ball links are 2.5mm and the Lungford Punisher link is 3.0mm. So you need to drill out the ball link a little but not too much. This way you can use the turnbuckle link but it is to hard turning to use as the turnbuckle is designed. You will need to fine tune by hand as a normal link would be. With the century rotor head you need a 56mm long link. What size did you get? no worry they are cheap..

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 07:08 PM  5 months agoPost 11
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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I got the 1 3/4" 1's you had on your post. I don't read everything like I should....

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 07:11 PM  5 months agoPost 12
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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Should I get these instead?

http://www.davincimachining.com/ind...emart&Itemid=84

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 07:34 PM  5 months agoPost 13
TailKiller

Senior Heliman

Panama City, FL

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I was just about to send that link to you.. They are what I ended up using.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 07:38 PM  5 months agoPost 14
TailKiller

Senior Heliman

Panama City, FL

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yeah.. 44mm not 56mm..

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-07-2017 07:57 PM  5 months agoPost 15
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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Ok found the 56mm 1's, ordered 2 sets!!

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-07-2017 11:34 PM  5 months agoPost 16
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

My Posts: All  Forum  Topic

Got my servo arms drilled close to the center like Tailkiller suggested. I did have to put a slight bend in the elevator rod so it doesn't hit the lever.

Now to wait for more parts...

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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01-08-2017 12:11 AM  5 months agoPost 17
Copter Doctor

rrProfessor

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

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Dennis has spent a lot of time getting this setup to work. He has all the good info for a smooth flying ship.

drive a rotary, fly a rotorcraft

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01-08-2017 01:04 PM  5 months agoPost 18
TailKiller

Senior Heliman

Panama City, FL

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Well... You can say I hit every pot hole in the road with this build and I have had a lot of bad days. Murphy's law in full effect. For example... I have never had a blade strike with this century rotor head but last week I found I had one bent feathering shaft, as I loosen or tighten the shaft the blade tip would raise up and down. I tried to get it tight at the same level as the other 2 blades but no luck it was always a 1/8 high or low so tracking was always a little off. New one will be here Tuesday.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-08-2017 01:58 PM  5 months agoPost 19
TailKiller

Senior Heliman

Panama City, FL

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Oh man you should not have bent that elevator link. This is where this Roban linkage assembly is funky. Slow down!!! This is going to be a long thread.. lol...

This is not a 3D bird with -13 +13 collective throw. And the reason for moving the servo ball closer to center is cause small servo movements make for large movements to the blades.

Your pitch curve setup will end up giving you a -4 +11 pitch range and that will stop the elevator link from binding on anything. Right now your pitch curve should be linear 0-25-50-75-100 which is fine, don't worry about the elevator linkage binding. When you setup that Century head you do it at mid stick.
The links that your getting for the head will solve the issue of binding.. by the time you get the blade grips at zero pitch at mid stick and reset your pitch curve to about 35-40-50-75-100, the elevator linkage will never bind again.
Also.. before you start the head setup.. reduce your travels on elevator, aileron and pitch to at least 80% travel.. you may need to go to 70%.. 100% is too much.
Your links for the blade grip to swash will be around 65mm long.with ball links. This measurement is the full length of the link, not from center of ball link to center of ball link.
This should get you close to where you need to be.

,Dennis
http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

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01-08-2017 02:13 PM  5 months agoPost 20
tintmaster

Key Veteran

Wichita, Ks. U.S.A.

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Okay I will do that. Thanks for the input.

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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