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


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Old 05-27-2021, 09:50 AM   #41 (permalink)
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Quote:
Originally Posted by lucasouthoffrance View Post
Hi, as for all other Goblins, you need to leave a little vertical play there. In previous kits (Black Thunder, see extract below) the need of some play (0,5 mm) was explicitely mentioned...don't make it too tight, otherwise you'll have friction during autorotations.
Happy building...it's a great heli!

Thank you for the quick reply! That is the information I needed and that makes sense. That note is not in the Genesis manual and with my lack of experience with the kit, I thought it would be best to ask! I am really liking these SAB kits! Thanks again!
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Old 05-27-2021, 03:18 PM   #42 (permalink)
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Join Date: May 2014
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You're welcome, happy to help!
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Goblin 500 sport / MKS HV9767 & tail KST servo/ HW120A V4 / EGODRIFT 4020HS-1050 / DH blades 511 & 87
Goblin Black Thunder Sport 700 / BK 7001 & MKS HBL669 / HW130AV4 / XNOVA 4530-500 / RTech ULT700 & 106. Both with BRAIN2BT, SPM4651T & DX8G2
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Old 05-27-2021, 04:12 PM   #43 (permalink)
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My HF Map location
Join Date: Jul 2006
Location: Meridian, ID
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Originally Posted by lucasouthoffrance View Post
You're welcome, happy to help!
I do appreciate it!

I put the three shims in and pulled the Front Tail Pulley towards the bottom of the shaft to take out any slop in the through hole and tightened the 4mm bolt and lock nut. Feels like a little bit of axial movement of the main gear, so that feels good now.

But decided to go one step further and check the axial movement of the main gear with my dial indicator and three shims. After setting it up, I am getting right around ,016 to .017" (.4064 to .4318 mm) so I am close to the .5mm. So, I think I will go with it and see how it goes.

Not the best, most accurate way to lock the transmission, but I did not want to spend a bunch of time to make a jig for something I am going to check once during the build and then periodically during maintenance. This will at least give me an idea of where I am at.

Also, let me check the runout on the main gear and nice to see that it was .001" to .002", so very good and well machined part.
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Last edited by spookyeng; 05-27-2021 at 10:14 PM..
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Old 05-29-2021, 02:42 PM   #44 (permalink)
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My HF Map location
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Location: Meridian, ID
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Another question. Can anybody that has build the kit confirm the shim size for the rotor head please?

In the manual its states it is a 6 ID x 8.5 OD x 1mm thick. However, the only shim in bag 7-3 is a .2mm thickness shim. I have looked in the shim bag and backup bag and gone through everything and can not find a 1 mm shim for the rotor head. Is this the correct shim or did they put the wrong part in the bag?

So far really liking the kit and its going together very nicely.
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