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SAB Goblin 630/700/770 SAB Heli Division 630/700/770 - Goblin Helicopters Factory Support


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Old 05-02-2021, 12:10 PM   #21 (permalink)
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I removed the servo brackets. Removed the servos. Cleaned all the bolts with alcohol again. They still seemed oily. Flipped the servos to the other side and reassembled them. They are close now. I hope thats good.

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Old 05-02-2021, 02:23 PM   #22 (permalink)
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On the Kraken I assembled my swash and sat it on the gearbox so I could check the alignment at this point. I used the small SAB spacers that go under the servo balls (Not low profile servos). Opposite side of the bracket is a big change, hopefully its perfect now
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Old 05-02-2021, 05:11 PM   #23 (permalink)
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You will be happy they fly real good...have 4 flights on mine so far...
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Old 05-02-2021, 05:16 PM   #24 (permalink)
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cover off
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Old 05-02-2021, 10:10 PM   #25 (permalink)
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Starting on the head. Page 10. Really nice plastic links. Beafy !! Glued the bearings in the radius arm with bearing retainer like it says in the manual. I like SAB gives you a tool to put together the links. Nice touch !! Also they are turnbuckles.

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Old 05-02-2021, 11:08 PM   #26 (permalink)
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Heads built. Everything went together as expected. Greased all the damper o rings, head axel , thrust bearings. I clean the internal threads in the head axel with alcohol and a q-tip. Then I put lock tight in the threads with a tooth pick before I assemble. Then just a small drop other end of the M6 bolts holding the main blade grip on.

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Old 05-02-2021, 11:38 PM   #27 (permalink)
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I finished the swash. But now looking from above withe the swash on top it looks to me like the servos are too far inside. That I may have to move them back to the way they were supposed to be mounted on the manual?

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Old 05-03-2021, 06:20 AM   #28 (permalink)
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I believe they are a bit inside (maybe 5 deg) - when you move them back they will be about 15 deg on the outside - so I think it is still the 'best' choice but to each is choice
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Old 05-03-2021, 06:41 AM   #29 (permalink)
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Put the servos back like the manual says the mechanical set up is very specific , you wont have any issues follow the instructions and use a Digital calipers when you do the links..It will all be spot on. Mine lined up with zero issues and the first flight was perfect stable take off and hover and that was before the autotrim.
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Old 05-03-2021, 07:40 AM   #30 (permalink)
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I moved the back servos back like the manual says. They look closer to me than the other way.

I ended up stripping one of the servo screws in the front servo mount. For now I just put a longer bolt and a nut. I will replace that part later.

I have to move the back one yet.

I canít remember what pinion comes with the kit. I have a Pyro 750-56 motor for the Raw. Since I am going to order some parts I may get some pinions.
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Old 05-03-2021, 08:24 AM   #31 (permalink)
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Sorry about the stripped screw !

I think the best option would be in between inside/outside - but given that MKS makes a servo hub for the X6 series (was looking this up) - this could be use when mounting on the outside to move the arm closer to being just right.

Might try this later -
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Old 05-03-2021, 09:18 AM   #32 (permalink)
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Not sure i use a xnova Lightning 4525-530kv
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Old 05-03-2021, 11:30 AM   #33 (permalink)
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The kit comes with a 21t pinion. So with my Pyro 750-56 it works out to 2100 to 2200 rpm. So it should be good.
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Old 05-03-2021, 11:50 AM   #34 (permalink)
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Quote:
Originally Posted by Freeskiken View Post
I kind of find it strange they ask for green bearing retaining compound for screws? I usually use red lock tight on all balls on the swash or in this case balls in the servo arms.

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Sab green loctite is not like the real loctite retaining compound iirc

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Old 05-03-2021, 12:36 PM   #35 (permalink)
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I just used red lock tight on the balls like I always do. The bearings that need it I use green lock tight retaining compound. I probably could have used red on the bearing as well. I have in the past and it works well.

I am not sure if I need to buy SAB special grease for the transmission and their grease for the one way bearings ? There was grease already in the one way. I didn't add any.
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Old 05-03-2021, 12:38 PM   #36 (permalink)
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Sorry about the stripped screw !
No problem about the stripped screw. I think it may have been a loose female thread and I probably overtightened it. I just ordered a new front servo mount.
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Old 05-03-2021, 09:34 PM   #37 (permalink)
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I have the servos switched back to factory. It looks close. I am sure it work fine.

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Old 05-03-2021, 10:07 PM   #38 (permalink)
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Links made and head is installed. I like the heavy duty plastic links. They snap on tight and fit perfectly.

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Old 05-03-2021, 10:28 PM   #39 (permalink)
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There wasn't a shim in my kit. The belt tensioner arm had a little ledge on the bottom where the idler bolts into.

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Old 05-03-2021, 10:37 PM   #40 (permalink)
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Belt tensioner assembled.

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