Servos for 30% Edge

[RappyMan]

Hi All
I've got a BME Edge 30% on the way & am really exicited about it. I was hoping to use a small stockpile of HS-6965 Hitech digitals that are smoking fast, but they max out at 111 oz-in torque & the manual requests 150 oz-in or better for the elevators and rudder. I'm going to use two for the ailerons (100 oz-in needed)
Here's the one I've got my eye on now http://www.servocity.com/html/hs-698..._coreless.html
Plenty of torque. $68 each with the sale.

Now for the big question - anyone seen better prices out there? ServoCity seems to do the best, but I'd like to hear where you guys are sourcing servos at.

Thanks
Terry Peterson
Can't wait to huck the Edge.... but I'm going to be waiting for the BME 55 - this is going to kill me!!! (late April at the earliest - DOH!)

[JoeAirPort]

I would not use Karbonite on anything above 60 size. I had some 635's strip out on a CAP232 120, never again. Luckily I got it down with no ailerons and minimal damage. I'd stick with metal gear if I were you. The 5645 if you are on a budget.

If you have more $$ 5945 are great for ail's and elevator, 5955 on the rudder is plenty. That's the setup I have on my BME Edge. Great plane by the way.

[Boulder]

I agree with Joe on the metal gear. I've never had a problem with my Karbonite servos, I run 6965's in my Showtime and I fly the he!! out of it.

For your 30% plane, the metal gear are much safer. You were ready to spend the cash on the 6985's so I would really recommend the 5945's for your application, a better centering servo than the 5645.

my .02

[green@3D]

Even Hitec does not reccomend anything less than a metal gear servo for gas applications, it is due to the vibration. I used 5645 hitecs on my last 30% and they worked very good.
went to 5945 on the one I am building now.

5645 for aileron and elevator, one 5945 for the rudder is a good but still economical.
just my .02

[RappyMan]

Just so I understand what is going on - the non metal gear servos will most likely break off at the splines? Or is it the gear train will strip? I ask because I fly helicopters too & metal geared servos are not recommended due to the vibration. They will wear and become sloppy much faster than a non-metal gear servo.
This is the first "real" gasser I'm getting into, so I'd like to get it right. I do have a 102" wingspan plane that has a G-38 on the nose, but it has S-148's all around on it. It has been around since 1990, but thinking about those servos in a big plane is pretty scary to think about now.

[RappyMan]

Just one more question - is PCM required on gassers? I know when I built the G-38 machine it was, but have things changed?
Thanks for the nod on the BME plane - I'm hoping for great things with it.

[David_Moen]

'Nother BME Edge here...same servo set up as Joe. After much research it seemed like the best value/performance combination.

[green@3D]

I don't run PCM but everyone else will tell you to lol

our last field had multiple planes going in due to pcm lockout, I never had a problem with my fm recievers once in a while (once or twice a season) I would get a twitch at the same spot in the field, ironically it is the same spot where all the pcm lockouts happened.

never had a crash not caused from dumb thumbs.

[JoeAirPort]

They can fail in both places actually. That's what mine did. Busted off the shaft and Hitech told me the gears were stripped. So yes metal gear are needed for the high forces put on the surfaces. The nylon or karbonite might be good for heli's but hell on planky's.

	Quote: Originally Posted by RappyMan
	Just so I understand what is going on - the non metal gear servos will most likely break off at the splines? Or is it the gear train will strip? I ask because I fly helicopters too & metal geared servos are not recommended due to the vibration. They will wear and become sloppy much faster than a non-metal gear servo. This is the first "real" gasser I'm getting into, so I'd like to get it right. I do have a 102" wingspan plane that has a G-38 on the nose, but it has S-148's all around on it. It has been around since 1990, but thinking about those servos in a big plane is pretty scary to think about now.

[LawnJockey]

I too am building a BME EDGE . I am using 5945 on all surfaces except rudder 5955 there and a HS 225BB on the Throttle. I am mounting the motor now and will be having the cowl painted to match the fuse next week.
Bruce

[RCFlyer55]

Would love to see a build thread on the BME. Is it the 540II?

[RappyMan]

I went for the V3 - suppose to be all the hardware (except for the spinner) plus complete wing, tail & fuse bags. The plane seems to a nice combination of light weight & good wing area. I should have plenty of time to do a build thread while waiting for the motor.