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Gear mesh

trillian

Senior Heliman

London, UK

I am close to finishing my Fusion 50 build and have watched the video about the white gears.

At the moment the mesh on all the gears is pretty tight, I don't think overly tight where you feel the resistance of the high points or any stickyness etc. but there's definitely no backlash in either the gears in the tail case or between the front tail gears.

So should I try to set them for some small amount of backlash or should I leave them tight and they'll bed in a bit?

It seems the problem with some of the tail cases was too much backlash / not enough engagement. Similarly with the front tail gear being able to move back.

I have checked the tail per the video and applied some tape at the front in the bearing race so definitely nothing is able to move around right now.

04-15-2012 Over year old.
p00rboi

Heliman

Rockville, VA-USA

Keep them tight. Also run a tight mesh between the pinion and main gear.

04-16-2012 Over year old.
honda411

Key Veteran

Surprise, AZ USA

And also slide the rear TT gear back to where there is no backlash and CA the gear to the inner race of the bearing in the tail case. There is also the modification where you tilt the boom case slightly at an angle in the frame, as if your raising the whole tail up a bit, and this will give the main tail gear a tighter fit to the umbrella tail gear. And grease the gears often helps.

HeliDirect Field Rep, Synergy N7 w/ OS 105, Torq Servos, Cyclone/ Rail blades

04-17-2012 Over year old.
trillian

Senior Heliman

London, UK

pinion support?

I am close to finishing my Fusion now and just realised that the motor shaft does not extend far enough to reach the pinion support bearing.

I have a Scorpion 4025 motor and I guess it's an earlier version. It has a 5mm shaft which does not extend past the pinion.

So, if I were to run it without the pinion support would I be asking for trouble?

The 550 does not have a support and it worked fine.

Otherwise I have to look into getting a longer shaft and figure out how to change it :-(

04-26-2012 Over year old.
p00rboi

Heliman

Rockville, VA-USA

What's you setup going to be? If you plan on running 10s or higher I would change the shaft and run pinion support bearing. Scorpion (Innov8tive Designs) has YouTube videos showing how to do it.

04-26-2012 Over year old.
trillian

Senior Heliman

London, UK

I am going 6s at the moment as I already have the ESC and Lipos etc.

I have ordered a long shaft with 6mm end, so when it arrives I'll get it changed out and there should be no problem with it engaging the pinion support. I'd rather just do it that way from the start I think, tempting as it is to just go ahead without it.

04-26-2012 Over year old.
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Gear mesh

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