mikes68charger

My Feedback: (34)

Hey guys I'm building a 1/7 F16 and with my Spectrum 6030 titanium I'm getting 4mm _ 2 up and 2mm down of slop, it's all in the gear train.

As full flying stabs will show slop more than most others control serfacs.

Have you found a servo with almost no gear slop?

Thanks

Dieselman1220

My Feedback: (25)

if they are new I wouldn't worry about about it...they all develop some slop. The jr 8411s, 8611s, and 8711s develop it after a while, savox seems to have a little less, just personal observation.
I have always run 8411/8611/8711s on the stabs of every jet Ive ever owned and while I've made note of it, it has never given me any trouble. What 1/7 F16 kit by the way?

mikes68charger

My Feedback: (34)

Thanks. I didn't even think of checking / feeling the slop on my skymaster f15 as I have only flown it 4 - 5 times. And it feels the same but I will say the hitec in my F15 feel like they are trying to fight the movement just a tad

I don't know what to say about the F16. I was thinking about making a build thread on it, as there is so little information about it online but I know how much this site hates FEJ.

What I will say it's a 1/7 F16 FEJ modern Honeycomb, ply, carbon fiber modle, I paid exactly $0.00 for it, my buddy who was scared off from building it because of this site, he got it free also from a buddy who won it as a jet show I was told.

I'm almost done with its build and I have to say I'm very impressed, not a single air leak on the door rams, wheels or gear holding air overnight.

I cut 2 access wholes in the elevators and see they have made changes from the FEJ xray thread, as it seems they have the shaft bolts going through ply now, with honeycomb on the out side of the ply then topped with a layer of carbonfiber, I added some more hard wood and aropoxy just to be safe.

My only conern was lack of bearing in the rear but the nylon sleeve is almost 2 in wide and is very slop free vs my Byron F16 turbine I was flying for a year. There is real wood all in the rear around the stabs and so much carbon fiber added the whole rear section is lamanted with it, I tend to be a over builder but I can see how I can improve on it

I didn't pay a lot for my P80 cranked to 21 pounds of thrust so I figured free why not, I know some on here said they would never fly FEJ, but free using almost every you just had laying around anyways. Come on.

Thanks

Len Todd

If you get Hitec programmable servos, you can program the deadband to your liking. Although the default program has the deadband set fairly low to start with.

If you never fly over people and houses, never direct the energy of the plane toward people or houses, etc, etc. with a realatively cheap plane, what is to worry about?

jetnuno

Hi

I am using BLS172 from Futaba in my HUGEEEEEE Yak 130 flyng stabs. With proper mecahnical advantage you will get 1/3 of the slope you are having

BR

dubd

FEJ hate isn't localized to this site. It's pretty much universal. Regarding your servos, a bit of slop in full flying stabs is normal.

BarracudaHockey

My Feedback: (11)

I find this a bit ironic considering the 6030's AFAIK are made by Savox

FalconWings

My Feedback: (57)

The slop in the F-16 stabs is mostly due to the control rods twisting or not being stiff enough, or being too undersized for the bushing. Any amount,as minor as it is, will only amplify itself onto the stabilizer.
One way to minimize slop inside the torque rod/bushing is to brush thin CA on the rod, then put some vaseline and work it inside the bushing.

try that!

David

drac1

My Feedback: (4)

This type of comment always makes me laugh.

Just because one company manufactures products for different brands, doesn't mean they have the same components/parts and quality. They are not the same product with different names. Each brand will have their own specifications required for their product. The sale price dictates what quality components go into the product.

Generally a cheaper product will be inferior in quality.

mavrick

My Feedback: (1)

Mike I had the same issues with my Raptor and ended up installing Savox as well but there was still a bit of movement 3 - 4 mm but with an all flying stab that's as about as good as you will get.
Mav

Erik R

My Feedback: (32)

Mike,

This is the servo that Tom Cook requires for the elevator on the Firebird. The pic is my backup, which never had to be used. The original never developed slop. Smaller servos now make more torque, but the gear train in this is bulletproof. Combine it with the JMP machined arm, and it will fly anything. It's huge. That's a JR 821 next to it for comparison. I don't need this one. It's new in the box, and has an aluminum horn in the package. PayPal me 50$, and I will send it to you, in the box. It will be the strongest part of your jet. Good luck,

Erik

Dieselman1220

My Feedback: (25)

I had no idea that savox even made those servos for spektrum. I have never owned a spektrum servo.

starfire24

My Feedback: (82)

I use Futaba servo's they are the tightest in the industry..Russ

vquick

My Feedback: (71)

If you want a servo with no slop try the MKS HBL 380 they are 570 oz of torque and no slop I'm using the HBL 860 in my hawk 437 oz of torque but I will be using the 380 in my next project the F18 they are expensive but you will have the best

BarracudaHockey

My Feedback: (11)

Savox makes several of the higher end Spektrum servos as well as all of the Align servos the helicopter folks love.

I've had excellent luck with MKS servos in high demand applications and was my first stop for servos for my 800 size Airwolf

F1 Rocket

I believe the MKS X8 series are the only standard sized servos available with an 8mm output shaft. I've used these in heli apps and the gears are slop free after hundreds of flights. Very good product and very well supported by MKS Servos USA.

FalconWings

My Feedback: (57)

Allow me to state again, I think your problem is not the servos. ALL F-16 elevators are inherently sloppy unless you take the slop away. Not likely a servo issue.

PaulD

My Feedback: (39)

+1 - IMO Futaba has the best no-slop gear train and deadband settings. If you go with some of the newer programmable Futabas you can even play with the deadband settings.

PaulD

mikes68charger

My Feedback: (34)

Thanks, I have checked over the whole install and its amazing how just a little movement on the servos translates to a few mm at the stab.

These Spectrum 6030 even thow they are titanum geard, may just need a new set of gears as 110in Katana may been harder on them than I thought.

I thought its odd to find that most flying stabs have a few mm of play and thats acceptable, but then when you think of how far that stab has to move to make much of a change in flight directions it makes you think diffrently.

Shaun Evans

Hi,

The funny thing is how many jets flew with full-flying stabs back in the DF days when a high-power servo had 90 ounces of torque. Even the fast ones! My first Y/A F-18 single had S-148's on the stabs and flew on an O.S. 91 at about 140mph. The older plans for the big F-18 showed some silly 80 ounce servos on the stabs.... that people used for years!

Fact is, if the stab is properly designed (I know we're talking about FEJ in this particular case, but the point stands), then the amount of required torque is a fraction of what people think. The power of the servo is more an issue on the deck than in flight with a properly designed and balanced stab. By balanced, I don't mean on the pivot, btw...

mikes68charger

My Feedback: (34)

I agree my Byron F16 had Futaba 3004 servos on the rear flying stabs when I got it. Lol

airega1

My Feedback: (204)

Mike, I had a Mig 25 with a heavy aft end elevator (flying stab) it took a toll on the ele. servo, until I counter balanced it, it made a huge difference on the strain

Terry Holston

My Feedback: (1)

I used to fly the old Byron F-16s with Futaba S48 (Only one) on the yoke for the flying stabs. Rosso.81 then .OS .91 power. Had more problems with the stab aluminum pivot shaft breaking untill I epoxied a music wire inside them.

FalconWings

My Feedback: (57)

Dont mean to dissapoint you but I use 90oz servos on my elevators, 70-75oz on ailerons, and 70 oz on rudder. 2000Mah battery.No regs, no power box. Have never lost an airframe to radio, servo, or battery failure.
1/8th Skymaster F-16.

Over the years on RCU I've learned how stupid people with very complicated equipment still lose their airframes due to stupidity. Instead of adding redundancy, I try to reduce stupidity.

Desertlakesflying

My Feedback: (28)

There is a lot of that needed on RCU.........