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HomeScale✈️AircraftScale HeliRoban Scale Helicopters › ROBAN 412 800size BUILD THREAD
04-27-2020 10:26 PM  34 days ago
droneproz

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Rancho cucamonga california

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co_rotorhead 1:13.8:4.7

It's the same for all of the 700-800 Roban mechanics. I use the governor on my ESC and use 13.8 for the gear ratio, even with the helical gear set.
Got it so I will plug that in.
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04-27-2020 10:27 PM  34 days ago
droneproz

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206 pilot I wouldn’t run motor up until I manually spun the motor a few times by hand to make sure the belt is not running high..
Perfect will do
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04-27-2020 10:27 PM  34 days ago
droneproz

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chopper37 Yup 13:8:1
Thanks.
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05-14-2020 09:03 PM  17 days ago
Girard Ibanez

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Tucson, Arizona (formally from Guam)

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@droneproz,

I'm building a Roban AS350 and Huey. I'm having issues with a Scorpion 560kv in particular the motor mounting holes and bearing support.

Can you share some light on this subject? Perhaps a picture of the motor section.

Thanks.

Team Thunder Tiger
since 6/2005 to 12/2014
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05-15-2020 12:47 AM  16 days ago
206 pilot

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I’ll have a drink then fly a kite Ben Franklin.

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I would contact tail killer on the site
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05-28-2020 07:44 PM  3 days ago
droneproz

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Rancho cucamonga california

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SHE FLIES!!! Maiden went very well on this bird. I did notice she needed a good pound of nose weight up in the front. Other than the WOW it flies amazing. Very docile and predictable Heli to fly.

Watch at YouTube

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05-28-2020 07:53 PM  3 days ago
droneproz

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Rancho cucamonga california

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I did do one flight last weekend and the 45deg gears stripped in flight. After looking at it carefully the gears seem to be gone from a loose mesh just by the looks of how they are eaten. I think there were a few things at play here

1. grease seems to be all gone ( what grease do you guys use?)

2. the tail bell crank wont allow you to fully tighten down on the screw that holds the bottom of the case. if you tighten too much you will hinder the movement of the crank. I plan to add a second washer to not allow the screw to compress the bearing this allowing it to be fully tightened. I feel under heavy loads this may allow case to give enough to affect mesh

3. I noticed ALL the nylon nuts seemed to have wore in, as if they had been used for months. They no longer had that tight feel, I will end up putting some good nylon nuts that have the blue plastic insert. I feel the old ones may had not held the case good enough thus causing it to loosen the mesh too.

Here are some pics, lucky heli landed safely

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05-28-2020 07:54 PM  3 days ago
droneproz

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Rancho cucamonga california

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Girard Ibanez @droneproz,

I'm building a Roban AS350 and Huey. I'm having issues with a Scorpion 560kv in particular the motor mounting holes and bearing support.

Can you share some light on this subject? Perhaps a picture of the motor section.

Thanks.
Yes the scorpion holes DO NOT LINE UP, its crazy bc its what's recommended. Thats why I went with EGO DRIFT as they were specifically designed for these heels and fit right in
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05-28-2020 08:23 PM  3 days ago
206 pilot

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Looks good,,, could of told you that was going to happen, also be careful of the fast backwards flight you will rip the tail off other than that looked good,, Rich
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05-28-2020 08:24 PM  3 days ago
206 pilot

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Oh yeah, pack that 45 with heavy grease it looks bone dry..I use marine grease, I have 205 hours on my 412 still loaded with grease gears look great..Rich
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05-28-2020 08:42 PM  3 days ago
droneproz

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Rancho cucamonga california

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206 pilot Looks good,,, could of told you that was going to happen, also be careful of the fast backwards flight you will rip the tail off other than that looked good,, Rich
Thanks Rich!
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05-28-2020 08:43 PM  3 days ago
droneproz

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Rancho cucamonga california

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206 pilot Oh yeah, pack that 45 with heavy grease it looks bone dry..I use marine grease, I have 205 hours on my 412 still loaded with grease gears look great..Rich
WhAt brand do you use?
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05-28-2020 08:55 PM  3 days ago
206 pilot

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Just sent u PM.. Rich
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05-28-2020 11:27 PM  2 days ago
47fan

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clancy montana

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206 pilot Oh yeah, pack that 45 with heavy grease it looks bone dry..I use marine grease, I have 205 hours on my 412 still loaded with grease gears look great..Rich
Rich is dead on there! That's the first thing I do when I start fitting the tail and have had equal success.
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HomeScale✈️AircraftScale HeliRoban Scale Helicopters › ROBAN 412 800size BUILD THREAD
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