RunRyder RC
WATCH
 1 page 515 views Post Reply
Home✈️Aircraft🚁Helicoptere-AlignT-REX 500 › 770/8900 setup
08-23-2008 07:32 AM  12 years ago
Topic Vote0Post 1
redvtr1000

rrVeteran

covington, GA

MyPosts All Forum Topic
770/8900 setup
just threw a 770 / 8900 combo on my 500, using the 600n carbon mount. I used the wheel that came factory installed on the 8900 and split the 450/600 specs from the 770 manual. Question is, even with the servo positioned as best as I could, there seems to be some angle to the control rod where it attaches to the servo. Looks like I either need to bend the control rod slightly as a solution unless I find a longer arm for the servo.

Anyone got some photos of their setup? Details?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-23-2008 10:10 AM  12 years ago
Pod Jockey

rrNovice

Victoria, Australia.

MyPosts All Forum Topic
Yeah same setup as I have, except I have a custom mount.
When mounting servo, instead of putting the wire end of servo through the servo mount, put the servo wheel end through. It should line up better. The only problem; the angle supports on top of the servo mounts may not allow, so you may need to file out this area.
Sorry i cant give you pics at moment.
I have seen it done on another members photo album, here on RR cant remember who.
Cheers
SHARE  PM  EMAIL  Attn:RR  Quote
08-23-2008 03:57 PM  12 years ago
Sillyness

rrVeteran

Little Rock AR

MyPosts All Forum Topic
You want the ball 8-8.5mm out on the wheel for the gyro to function well.

I have the same gyro with a 3500G servo and the combo rocks... very solid with constant piros.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-23-2008 06:00 PM  12 years ago
redvtr1000

rrVeteran

covington, GA

MyPosts All Forum Topic
Thanks for the info I'll see if I can't get it closer to 8.5mm but
I'm thinking that it might make the angle a bit worse.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-23-2008 06:26 PM  12 years ago
twitch

rrKey Veteran

Las Vegas

MyPosts All Forum Topic
I would use a 3400G or 3500G on the 500. The 8900 is a bit large and will cause that problem
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-24-2008 04:38 AM  12 years ago
redvtr1000

rrVeteran

covington, GA

MyPosts All Forum Topic
I could have tried the smaller servos but so many folks using this combo that they can't all be wrong.

Either way, with the packs im currently using and this servo/gyro combo the heli balances near perfect.

Basically, set the gyro by the book and got the linkage as good as I could seem to get it, still has a slight angle toward the front. Centered the pitch slider with the ball just about 90 on the arm (might be slightly off because of the way the wheel wanted to go on the servo).

Gain set at 65 or so in the dx7 resulted in a pretty solid hold. I must say, coming from 401s I am pretty impressed. Im used to the 401 swingin the tail a bit with rpm changes in normal mode and this thing held like a rock for that purpose. I didn't yet get into any aerobatics with it but seems to be holding well and the initial piro rate almost blew me away. Backed that down slightly
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
08-24-2008 05:06 AM  12 years ago
twitch

rrKey Veteran

Las Vegas

MyPosts All Forum Topic
The problem is the 600 mount and and full size servo sits lower on the boom and will cause your problem. The 500 comes with the mini servo size mount for this reason. If you insist on the 8900G I would get the microheli mount from helidirect and should fix the problem.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 515 views Post Reply
Home✈️Aircraft🚁Helicoptere-AlignT-REX 500 › 770/8900 setup
Print TOPIC

 2  Topic Subscribe

Sunday, September 27 - 11:27 am - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online