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Home✈️Aircraft🚁HelicopterFuel-Helicopters New or Limited ActivityNext D › Anyone using Futaba servos on collective in the Ballistic or Ballistic frame conversion?
03-03-2012 08:22 AM  9 years ago
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AnneThe Man

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Ireland

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Anyone using Futaba servos on collective in the Ballistic or Ballistic frame conversion?
I'm only on page 6 of the Ballistic manual and already having problems. The spacing between the two elevator servo hex spacers is designed for JR not Futaba servos, short of using brute force, modifying the Futaba servo case or buying JR servos my elevator servo will not fit between the hex spacers. I hope it isn't the same with the other two collective servos.
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03-03-2012 09:03 AM  9 years ago
PetterS

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Gothenburg, Sweden

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My 252 fits. They get a little streched in the rubber mounts but nothing critical.

What type are you using?

//Petter
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03-03-2012 09:44 AM  9 years ago
AnneThe Man

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252s They did go in, but too stressed for my liking.
I had to release the 4 cap head screws on the elevator servo strap (carbon plate) but then the spacing between the two hex bars was too far apart for the holes on the frames.
If you remove the rubber grommets it would fit a lot better, but with them it's just too tight. I'm not keen on shoe horning them in.
The hole spacing is correct for JR servos, but the holes are 2.5-3mm further apart on Futaba.
On most other helis the holes for servos, and the way you fit them, are often slots, which makes allowance for the different sizes.
On my Avro there are 2 different fixing parts for the 2 different types.
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03-03-2012 01:07 PM  9 years ago
Ejeremy

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Bourbonnais,IL

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I'm running bls255 and bls256 the rubber is stretched a little but works just fine.

Team Futaba
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03-03-2012 01:13 PM  9 years ago
AnneThe Man

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I have only tried fitting the elevator servo so far, and in my opinion the rubber becomes fairly pointless if you have shoehorn the servo in so hard that it becomes difficult to turn the screws.
If you look at the futaba servo holes lined up with the holes in the hex bars, there is no room for the rubber, the screw is jammed up against the plastic of the servo.
I have two DS8301s, I'll probably have to buy a third.
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03-03-2012 01:46 PM  9 years ago
MarshallB

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Middle Arkansas

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I have BLS451's in one Ballistic and BLS252's in the other one. I have no issues with either setup. They mount and work just fine.
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03-03-2012 01:56 PM  9 years ago
AnneThe Man

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I must be imagining it then, or maybe just making it up?
How silly of me!
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03-03-2012 02:02 PM  9 years ago
MarshallB

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Middle Arkansas

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As Petter says it may touch a bit but it can work fairly easy. No you are not imagining it. One thing to mention is I do not use the eyelets inside the rubber part. It makes it easier to install, gives better cushion in my opinion and the carbon plate flattens everything firmly. Are you using the eyelets?
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03-03-2012 02:27 PM  9 years ago
Ejeremy

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I don't use the metal eyelets either.

Jeremy
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03-03-2012 02:39 PM  9 years ago
Sky Dancer

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Bryan, Texas

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I originally had Futaba servos on my ENV and they mounted a little tight but worked just fine.

I believe it is preferable on electric helis to firmly mount the servos for a very positive control response.

Mounting servos too tight in a Nitro heli is another story....

Don C
Keep up your rotor speed !
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03-03-2012 04:07 PM  9 years ago
AnneThe Man

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Ireland

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No eyelets.
When I tried fitting the 252s and the screws were binding I opened up a DS8301 box and it was clear the spacing was designed for JR. The 252s are too tight with rubber grommets for my taste, even if there is far less vibration with an electric. The screws do go in, but it results in everything being under strain, which I don't like.
I prefer the 252s but it won't make any difference to the quality of my flying. I just can't really afford to buy 3 JR servos to get it right. I have two 8301s but I'm not sure if they are man enough.
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03-03-2012 04:09 PM  9 years ago
airdodger

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Johnston USA

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You would think the manufactures would be smart enough to sell servos with cases made to fit either. Most is just a problem of the eyelet spacing the rest usually fits. All they would have to do is change the eyelet holes in the top case. Meaning sell a JR servo with a top that measures Futaba spacing or Futaba sell a top case that fits JR spacing. How many more servos would one of them sell if they did that.Chris
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03-03-2012 05:41 PM  9 years ago
AnneThe Man

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I agree but the design of most servo "trays" allows some flexibilty in fitting. It is only when you are directly screwing the servo into a threaded hole that you have problems.
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03-03-2012 05:50 PM  9 years ago
rocket_33

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Mount Pleasant, Michigan USA

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Maybe can machine up some new brackets to work with the Futaba servos
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03-03-2012 05:58 PM  9 years ago
Ejeremy

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IMO there's really no need to the stock work just fine! Team Futaba
Team Thunder Tiger
Team Radix
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03-03-2012 06:00 PM  9 years ago
AnneThe Man

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Ireland

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Might be cheaper to buy JR servos!
Or find alternative grommets that go between the servo and plate rather than in the servo hole.
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03-03-2012 07:05 PM  9 years ago
airdodger

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Johnston USA

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The heli's are becoming more dedicated to certain sizes, the new pro 500 you can't get a JR servo to fit, too small. I don't like them dictating what we use. I am sure they do it on purpose, or they are just dumb.Chris
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03-03-2012 07:14 PM  9 years ago
AnneThe Man

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Ireland

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I found some s3003 servo grommets, 10X better than the standard 252 grommets for this model. Might actually work.
I was also quite annoyed that I had to go out and buy new main blades for the ENV as the Funtech blades would not fold back - you had to take them off. I'm far too lazy.
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03-03-2012 07:18 PM  9 years ago
airdodger

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Johnston USA

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I glad this came up as the Ballistic was next on my list, but now maybe not.Chris
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03-03-2012 07:52 PM  9 years ago
krcnz

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Tauranga - New Zealand

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I glad this came up as the Ballistic was next on my list, but now maybe not.
Really?? - You would decide a heli on a detail like this?
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