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Atom 7HV Compass Atom 7HV Model Helicopter Discussion


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Old 01-26-2012, 05:15 PM   #1
AnTi Taco
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Default 7HV and 9180 servo with compass arms @ 17.5mm work with vbar ( see last post))

for the guys using the outrage servos what servo arms did u end up using...i was gunna use the stock outrage wheels like i always do when i use outrage servos but this helis is direct to swash and don't think it would look right with circle wheel so wanna see what others are using and what i should use..i do wanna stay away from metal servo arms cause i hear the strip your gears in a crash and i rather strip a plastic arm instead...
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Old 01-26-2012, 06:09 PM   #2
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Yeah I was just measuring this up when installing my servos and noticed none of the Outrage options really gave me the 17.5 thats called for.
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Old 01-26-2012, 07:40 PM   #3
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Stock Atom 500 futaba arms work perfect on Outrage, MKS ot Futaba servos. Give you exactly 17.5mm from center
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Old 01-27-2012, 07:03 AM   #4
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Thanks for the heads up, just placed an order for some.
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Old 01-27-2012, 08:35 AM   #5
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Quote:
Originally Posted by belcom View Post
Stock Atom 500 futaba arms work perfect on Outrage, MKS ot Futaba servos. Give you exactly 17.5mm from center
Hyperion, Savox and Align too.
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Old 01-27-2012, 12:24 PM   #6
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I used the stock compass arms from the 6hv
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Old 01-27-2012, 06:26 PM   #7
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yeah the atom 500/6hv Futaba arms. Or you can use the MKS 4 point heavy duty arm, and cut all arms off but one.

Any Futaba splined arm will work, it's just getting it long enough and then strong enough that's the trick.
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Old 01-27-2012, 07:02 PM   #8
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I just started building my 7HV and I have Outrage 9180's for the cyclic servos. I went by the hobby shop today and picked up the Du-Bro Super Strength arms and they did not work out. The nut on the ball link hit the metal bearing block because the Du-Bro arms stick out very far from the servo. I guess I will have to wait and order some different arms.
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Old 01-27-2012, 07:08 PM   #9
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The arms that come with the Outrage servos are strong enough, but the best hole is at 19.5mm. Will that 2mm make a huge difference?
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Old 01-27-2012, 07:11 PM   #10
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i didnt open every bag in my 7hv kit but does the kit come with any servo arms like the 6hv did?
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Old 01-27-2012, 07:20 PM   #11
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Quote:
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i didnt open every bag in my 7hv kit but does the kit come with any servo arms like the 6hv did?
Mine did not.
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Old 01-27-2012, 08:59 PM   #12
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I.use the atom.500.stock.servo.arms.that come.with the 6hv on both my 6hv's and I would.like to use them.also.on.my 7hv but I'm a little worried that they won't home up....they don't seem like there that strong....would u guys trust them on your 7hv?
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Old 01-28-2012, 03:04 PM   #13
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Got the Atom 500 arms in the mail today, I don't see how these fit the Outrage servos. The splines line up but trying to push the arm on...forget about it.
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Old 01-28-2012, 03:10 PM   #14
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Mine were tight, but went on fine. You are using the futaba ones??
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Old 01-28-2012, 03:21 PM   #15
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Yeah, its going on but I'm having to REALLY push it. Very very tight fit.
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Old 01-28-2012, 03:27 PM   #16
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Quote:
Originally Posted by Gawl View Post
Yeah, its going on but I'm having to REALLY push it. Very very tight fit.
yeah i use them on my 6hv with those arms and they are a tight fit but i guess that a good thing
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Old 01-28-2012, 03:36 PM   #17
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Dave Kettlehut, and I use the atom arms. I think Eric Brandenburg uses them too. Tony uses the MKS arms that he trims as I mentioned in my prior post.

The compass arm hold up fine in flight, at least that's my experience. In crashes they are prone to stripping the splines though, so keep some spares around. I think the MKS arms are beefier, so probably less likely to strip, but you are just moving a point of damage somewhere else IMO, ie other links etc... Something has to give you know!
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Old 01-30-2012, 10:16 AM   #18
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The compass futaba arms are sold out everywhere any one have a link to the DuBro arms that work? these the ones right?? if so i have a set of these already that i got in a trade but they are the JR ones (WHITE ones) and from the center of the screw to last hole is 18.5mm so its 1mm over the suggested 17.5 mm is that ok?? also are the stock atom 500 futaba ones 17.5 exactly? i know a post

edit : duh a post above says compass ones are exactly 17.5 so im gunna really try to find them in stock


http://www.amainhobbies.com/product_...rvo-Arm-Futaba
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Old 01-30-2012, 11:13 AM   #19
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Quote:
Originally Posted by AnTi Taco View Post
The compass futaba arms are sold out everywhere any one have a link to the DuBro arms that work? these the ones right?? if so i have a set of these already that i got in a trade but they are the JR ones (WHITE ones) and from the center of the screw to last hole is 18.5mm so its 1mm over the suggested 17.5 mm is that ok?? also are the stock atom 500 futaba ones 17.5 exactly? i know a post

edit : duh a post above says compass ones are exactly 17.5 so im gunna really try to find them in stock


http://www.amainhobbies.com/product_...rvo-Arm-Futaba
I tried these with the Outrage servos and found they stuck out too far on the elevator servo. The nut would hit on the metal bearing block.
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Old 01-30-2012, 11:17 AM   #20
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Quote:
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I tried these with the Outrage servos and found they stuck out too far on the elevator servo. The nut would hit on the metal bearing block.


ok thanks that def rules them out...just gotta find the stock atom 500 arms then .. out of stock everywhere
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Compass 6HV Savox/ 9188, Vbar,
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