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Goblin 280 SAB Heli Division - Goblin 280 Helicopters


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Old 02-13-2018, 11:39 PM   #1 (permalink)
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Default miniComet: How to level the swash?

I am trying to figure out a good method to level the swash on the miniComet. The Soko tool is a bit too big to perform a virtual shaft calibration. The zip tie method does not work well for this swash design.

What are good options to level the swash on this helicopter?
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Old 02-14-2018, 01:04 AM   #2 (permalink)
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Originally Posted by curmudgeon View Post
I am trying to figure out a good method to level the swash on the miniComet. The Soko tool is a bit too big to perform a virtual shaft calibration. The zip tie method does not work well for this swash design.

What are good options to level the swash on this helicopter?
Just eyeball it and then tweak any drift issues in the field.

I know it sounds sloppy but really, after years of sweating over swash levellers and Soko tools I can say that in most cases this works either perfectly well or well enough to get you in the air safely where you can do some final tweaks if required. Just make sure you set the swash perpendicular to the main shaft and bear in mind it may not necessarily appear to be level with the frame.

Obviously you will still need to use the Soko or other pitch gauge to set your pitch and cyclic.
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Old 02-14-2018, 01:51 AM   #3 (permalink)
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They do make a swashplate leveller for it
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Old 02-14-2018, 05:20 AM   #4 (permalink)
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The Lego method got me very close.
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Old 02-14-2018, 06:02 AM   #5 (permalink)
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SAB line of helicopters have a nice feature: zero pitch is marked in blade holder. Helps setup quite a bit.

This is my method.
1. set all servo neutral positions so that each horn is in 90 deg position.
2. mark the blades 1, 2, (3)
3. turn main shaft so that ball links in swash from cyclic servo no 1 push rod and push rod from blade no 1 are above each other.
4. adjust push rods (normally from servo) and servo mid position (FBL setup) so that marks in blade holder show zero pitch.
5. rotate main shaft 120 degrees and adjust next servo / push rod.
6. repeat 5. for 3rd servo

7. turn main shaft 180 degrees (or 120 for 3-blade hub) and adjust blade no 2 to zero pitch from push rod between swash and blade holder.

This way you able to make at least as accurate zero pitch & swash leveling setup as with swash tool and/or digital pitch gage.

Of course you need to continue FBL setup with pitch gage.
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Old 02-14-2018, 11:54 AM   #6 (permalink)
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I bought the swash leveler. It was fairly easy to use and helped make sure my arm lengths were correct.
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Old 02-14-2018, 12:01 PM   #7 (permalink)
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I ordered the swash leveler. Thanks
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