Solid G Knight 3D settings?

[Made2Fade]

Anyone had a good mess about with the Solid G on a Knight 3D? Flew my 3D tonight and the tail felt like crap basically. Im using the Solid G gyro with a 9254 tail servo. Seemed to hold okay but it the feel of the gyro made me constantly feel like it was gonna give way. The piros and control of the tail in general felt delayed and the stops wernt solid at all. Felt as if it was gonna keep on piro'ing when the stick was back to centre. I tried it on the 600N and raptor 50 settings and both seemed exactly the same. Anyone got any ideas? Surely this gyro cant be this crap and its just a settings/setup thing? If it is then i must say its not a scratch on the Spartan 760 i have.
Cheers
Lee

[Ade_Law]

it does seem to be a little sensitve to mounting, if you have the strap too tight it will cause issues.

im running a spartan gyro pad on mine now with the thin white pad, metal plate and futaba style pad and it does seem to be better but the strap is defo a fail safe rather than something that holds the gyro on.

also stick about 15% expo on the tail and drop the dead band.

Ade

[mchristyuk]

Lee,

I don't have one on a Knight 3D but I do have them on a Vibe 90, 50 and Aurora.

Mine all hold very well and hard so I'm guessing it must just be a set up issue. The different model settings in the Gyro menu aren't going to make a huge difference.. just fine tuning really... so it sounds like you have something else fundamentally off..

I'm running radix 95mm tail blades, an 8900g and have the servo ball about 17mm from the servo centre.

With this setup I'm running about 85% gain in the hover (JR transmitter) and 60% in aerobatics.

How does that compare with your settings?

Cheers

Mark

[jiberjaber]

Lee - I have one on my Knight and haven't found a problem.

I run a 9254 and a AR7000 with DX7 with 30% expo on the rudder (at the moment), stock tail blades.

My settings I have scribbled down are as follows:

Setup
Gain = 60
Center is 1510
Left stop is 1083
Right stop is 1936

Model
T600N

Piro
Left stop speed 60
Right stop speed 63
Left fast stop speed 25
Right fast stop speed 36
Left cst/rbd 67
Right cst/rbd 70

Responce
Pir Spd 35
Pir Bal 50
Gain Bal 40
Rate gain 25
Heading gain 45
Pir Gain 15

Parameter Menu
Expo 80
Expo width 30
Heading Lim 100

The l/r stops give 427/426 movement either way - so nearly symetrical movement. The left stop gives about 2mm gap on tail shaft (so the pitch arm doent foul). Max throw I could get on the right stop was 561, but this would jam the left stop in to the tail if I tried to get this symetrical!

Not flown since I set the symetrical throws but this is how the setup was explained to me by Rob after some chats he is aware have been going on with Curtis. When I flew before the symetrical setup it seemed OK but I was unaware that the pitch arm was making a grove in the tail!

There's some stuff here but not read it all as yet

http://www.4dproducts.co.za/ProductI...=YEI-YE-SOLIDG

[Made2Fade]

Right guys... thanks for the quick replies by the way... Im running radix 95mm tails also and i have the gain set to around 60% in the gyro menu on my DX7. Its a brand new engine so only hovered around the 1 tank before realising im not gonna get far with the gyro being the way it is. Im also 17mm from servo centre on the tail. Now i did think about expo Ade (something ive never ever used on any tail on any model before)... the tail kinda felt like it needed it. Im trying to describe how it felt but its very difficult. The feel of the tail is like no other gyro i have experienced. Very strange... even though it didnt it almost feels like it could leave go at any moment. By the way ive just mounted it with the stuff that came with it. Ive heard Mark mention about the strap being too tight in one of his earlier posts and so slackened mine off a little so i dont think its got anything to do with that. Just sooooo disappointed in this and really hoping its a setup thing. As i say i tried the diffrent model parameters and it was the same so realised it had nothing to do with that.

Cheers lads
Lee

[Made2Fade]

Jason thanks for that... i too only realised today that the pitch arm was fouling. Is there not a mod to correct this or do ya just set the gyro end point so it doesnt foul (few mm off the tail casing)? Also will i have to compensate to make the rate the same when doing the other end point adjustment? So disappointed... really hoping i can sort this thing out.
Also Ade... what do ya mean about dropping the dead band?

cheers
Lee

[jiberjaber]

According to Rob - set it so it just misses (about 2mm of gap between the gear box and slide shaft) and make sure the throw is symetrical about the centre to ensure even piro rates in either direction.

I havent messed with the other settings from what I can remember - just selected T600N and set the servo, left and right end points. I did wind the piro rate down a bit but that was before I scribbled down the above settings. These settings are the current ones I have on there now. When I get a new piston ring I'll let you know how it flys

OH.... just a thought. I have mine mounted at the back on 2 futaba GY401 pads (I think it is two!) Not sure on the hole distance on the arm, I may have a photo which might give it away)

[Made2Fade]

hmmm, keep me posted mate its all very intresting. I know some of these yanks swear by these gyros and im scratching my head at the moment wondering why. Ill have a fiddle next time i get a chance and report back. Cant figure out if your on the 3rd or 4th hole in that shot?
Cheers
Lee

[robgt]

Thats definitely on the 4th hole
Cheers,
Rob

[Made2Fade]

That aint 17mm is it Rob?
Cheers
Lee

[jiberjaber]

Thats definitely on the 4th hole
Cheers,
Rob

^^^ Wot he said (I think )

Gyro is mounted as per attached pic. Defo 2 futaba pads (from the pic)

[robgt]

I think it's about 18 to 20mm??
My toolbox is in my car which is nowhere near me currently so can't measure the 4 way servo horn I have in my hand - that's quite annoying then

Cheers,
Rob

[Made2Fade]

Im sure the 3rd hole out is 17mm so therefore it will be around the 19mm mark. I wonder if this could be part of my problem as im at 17mm?
Cheers
Lee

[mchristyuk]

Lee,

You mentioned about expo. The Solid G is just like the JR gyros in that they like a lot of expo on the tail rotor to feel right. I'm running around 40% expo on my machines.. just something to bear in mind.

Cheers

Mark

[mchristyuk]

Lee,

A couple other points that have come to mind:

1) All the people complaining of sub optimal performance on the Solid G seem to be running Futaba servos. I wonder if it's like the CSM and prefers the JR 8700/8900G series of servos?

2) You're running 60/90 size tail blades on a 50... What will happen if your blades are too big is that you'll have to reduce your gyro gain to stop the tail from wagging.. and therefore have less than optimum performance. On my 90 with 95mm tail blades the highest gain I can run is 85% which suggests that even there the tail blades could be reduced slightly in length..

Cheers

Mark