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02-07-2008 09:25 PM  11 years ago
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heliup

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Barcelona, Spain

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3150 or 3155?
Hi, I'm mounting a lepton and I don't know what servos mount.
I'm between futaba 3150 and 3155. Whitch are better for the ciclic?

3150 stronger but 3155 faster and cheaper. Too weak teh 3155?

thanks
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02-07-2008 10:26 PM  11 years ago
Blik

rrApprentice

Ontario North

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Here are the specs on the two. The 3150 are a little smaller and the 3155 would definately fit the Lepton perfectly. The torque on the 3155's is a little low but should work for sport flying. The better choice is the Airtronics 94761Z's which have both speed and torque, but you pay for what you get.

Cheers
Blik

S3155 Specs: $49.99 each
Digital
Operating Voltage: 4.8-6.0 Volts
Operating Speed (4.8V): 0.15sec/60 degrees at no load
Operating Speed (6.0V): 0.13sec/60 degrees at no load
Stall Torque (4.8V): 30.5oz/in. (1.4kg.cm)
Stall Torque (6.0V): 35 oz/in. (1.7kg.cm)
Motor Type: 3-Pole Motor
Bearing Type: Ball Bearing
Gear Type: Metal Gears
Dimensions: 1.2" x .43"x 1.16" (30 x 10 x 29mm)
Weight: .71oz. (18g)

S3150 Specs: $54.99 each
Digital
Operating Voltage: 4.8V (Futaba does NOT recommend using 6V)
Operating Speed (4.8V): 0.25sec/60 degrees at no load
Stall Torque (4.8V): 51.4 oz/in.
Motor Type: Coreless Motor
Bearing Type: Ball Bearing
Gear Type: Metal Gears
Dimensions: 1.1" x .5"x .8"
Weight: .71oz. (23g)

Airtronics 94761Z Digitals $64.99 each
Operating Voltage: 4.8/ 6.0V
Torque 55 / 66 Oz In @ 4.8 / 6.0 V
Speed 0.15 / 0.12 sec @ 4.8 / 6.0 V
Motor Type: 3 Pole Motor
Bearing Type: Ball Bearing
Gear Type: Metal & plastic Gears with two bearings
Dimensions: 1.06" x .47" x 1.18"
Weight: .71oz. (22.6 g)
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02-08-2008 07:04 PM  11 years ago
Fernando

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Madrid

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do not mount those, go for the 9650 if you want performance.
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02-08-2008 07:56 PM  11 years ago
Blik

rrApprentice

Ontario North

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The 9650's are a good servo but will not fit the Lepton unless you cut some of the carbon frame away. If you want top of the line then go with the 94761Z's otherwise the Futaba 3100 series servos will work. I guess it all comes down to your budget and the type of flying you do.

Cheers
Blik
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02-08-2008 09:23 PM  11 years ago
demosa

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Tigard, Oregon, U.S.A.

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In my book the Airtronics is out of the question because I can't find parts for it ...

Note that although there is a difference in speed between the 3150 and 3155, the speed is recorded and published at no load.
When you apply some load and turn the servo 60 degrees, guess what happens. The faster servo with the lower torque rating turns almost as fast as the slower servo with the higher torque rating.
Also, the difference in speed is almost 2x for 60 degrees movement.
Even with hard 3D you won't be requiring the servo to do 60 degrees at any one time. So in my opinion, torque is more critical than speed when comparing the 3150 to the 3155 for the Lepton.

I went with the 3150.

Good luck.
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02-08-2008 09:27 PM  11 years ago
demosa

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Tigard, Oregon, U.S.A.

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Oh and by the way, the 3150 is dual ball bearing while the 3155 is not.
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02-11-2008 04:52 PM  11 years ago
heliup

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Barcelona, Spain

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Very well. Demosa, I agree with your reasons.
I don't know where to buy the airtronics servos online. Some good place to buy it?
I will think about the airtronics and the 9150.
I fly 3D, just started with piro filps, etc.
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02-11-2008 04:59 PM  11 years ago
Fernando

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Madrid

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My recomendation is to go for the 9650.

You will regret if buying the 3150, they are not up to this heli. You will think that the heli does not fly well, that it boggs and many other things heard in this forum about this heli. You wil then sell it.

I have been there.
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02-12-2008 10:27 AM  11 years ago
heliup

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Barcelona, Spain

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OK, no 9150 for great performance. Airtronics 94761Z are 10$ more expensive but have more torque and fit lepton's frame.

Aren't better the airtronics 94761Z?

thanks Fenando ;-)
logo 500 3D, mini titan, atom 500
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02-12-2008 10:57 AM  11 years ago
heliup

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Barcelona, Spain

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And hitec doesn't have a good servos for lepton?logo 500 3D, mini titan, atom 500
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02-13-2008 12:47 AM  11 years ago
Blik

rrApprentice

Ontario North

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Here is a store that shows all the Airtronics 94761Z parts:

http://globalservices.globalhobby.com/part/474150.asp

If any of you guys are close could you give them a call and see what they have in stock?

Global Services
18480 Bandilier Circle, Fountain Valley, CA 92728
TEL 714-963-0329 FAX 714-964-6236
service@globalhobby.net

Cheers
Blik
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02-21-2008 02:23 AM  11 years ago
Benj

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Mulgoa, NSW Australia

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demosa: Oh and by the way, the 3150 is dual ball bearing while the 3155 is not.
I pulled apart my Futaba 3155 and my one had 2x ball bearings.

Benj
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02-26-2008 03:21 AM  11 years ago
Griffin

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Knoxville TN

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And hitec doesn't have a good servos for lepton?
I'm thinking about trying the Hitec HS-5245MG in mine. I'm not sure about fit though.
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03-08-2008 01:33 AM  11 years ago
HiroboFreak

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Central Coast, NSW, Australia

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Hiow did you go with the 5245mg's in the Lepton?

Thinking of trying some myself.
T-rex700n VBar 5.3 Pro | T-rex700e DFC VBar 5.3 Pro | JR DSX9
Team RCBits | Team Lynx
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03-08-2008 06:33 AM  11 years ago
balbs

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Los Angeles, CA

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HS-5245MG will NOT fit...They were my first choice. They are too wide for the stock frame. Even the servo mounting screws will not match the holes on the stock servo mounts. I had to send them back. I'm currently using Airtronics 94761z and they fit perfectly.

Balbs
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03-08-2008 09:24 AM  11 years ago
HiroboFreak

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Central Coast, NSW, Australia

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Cheers.

Thanks for that. I've decided to go with Hitec HS-85MG's

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03-08-2008 10:09 AM  11 years ago
balbs

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Los Angeles, CA

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If you can wait, HS-5082MG is due to be out. It's the digital version of the HS-81 which others have used in the Lepton.

Balbs
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03-08-2008 09:42 PM  11 years ago
HiroboFreak

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Central Coast, NSW, Australia

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Nah I'll be happy with just analogs on this heli.
Trying to keep the cost down & current draw to a minimum.
T-rex700n VBar 5.3 Pro | T-rex700e DFC VBar 5.3 Pro | JR DSX9
Team RCBits | Team Lynx
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03-11-2008 08:13 AM  11 years ago
Qooo

rrApprentice

Hong Kong

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My friend tried 3150 and he feels it is a way too slow and he moves to use Airtronics which is much better now.

For me, we want to try JR3405. I think I will get them from hobby shop today and see how will work out!!
DX7 - FREYA EVO90 SWM - LEPTON EX 6S - LOGO400 VBAR 6S - LOGO600 VBAR 12S
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