Powerbox settings
 

I am prepping my Skymaster F100 using Powerbox Mercury SR2 and wanted to know what a good start setting is for gyro sensitivity lock feel, etc. thanks for any help

I would fly it a bit first then adjust. If you pump in gyro settings from new you will never know how the aeroplane flies!

I get all that as that is plan but looking for starting point on all settings. I have F4 in same position. I will be doing maidens on both aircraft in the next couple weeks

Lock feel most people start around 10%

Kevin,
On my SM 1/7.75 F-4 I’m flying Mercury SRS (I am fly Competition SR2 with iSat gyro in my 1/5 SM F-16) I set my gains manually with both gyro systems, rather then using the Assistant. With ailerons, rudder, and elevator with large deflection, transmitter settings don’t matter because of rigging of servo arms. The F-4 Ailerons = 45% gain, Elevator = 40% gain, Rudder = 45% gain.
I haven’t flown an F-100. But warbird jets require higher gain than sports jets. On any jet that I maiden, I start at 25% on all controls. After clean trimming, I turn gyro on to further trim flap settings. IF I get any gyro wobble, I turn gyro off, reduce power and speed, then turn gyro back on. If continued wobble, turn off and land. I’ve never had any issues with any jet at 25%. And if I was doing the maiden on the F100, I would start at 25% and gradually increase by 5% each flight, one axis at a time.
I thought you and I have chatted about the F-4 over the past couple years? You can watch both my F-4 and F-16 with iSat on YouTube with same s/n: rcflyerdan. The F-16 I only have two flights, and not fully trimmed.
Best wishes! Dan
PS: These are settings in the Mercury, the transmitter switch is 3 positions of +100-0- -100. But I usually turn attitude hold to 0. So switch is: +100-0-0.

I always seem to initially wind up on a three-position switch with the settings for all three surfaces at 0, 20 and 25%. Maidens at 0%. Once the flight modes are trimmed, then I try the gyro. Occasionally, I end up later tweaking an individual surface a bit more or less. But starting out, all three surfaces are set the same. It is always better to start out low, work your way up, and then check each individual surface (i.e. as you individually increase each surfaces setting, check how the plane reacts to quick stick movements and higher speeds.)

Not saying this is the right way to get there. It is just how I do it because fiddling with the knob on a maiden can be a bit taxing, especially if you inadvertently start out with the knob in the high position versus off. IMHO a lot goes on during a maiden and there is no need to be fiddling with the gyro let alone a gyro on a knob during a maiden.

I’m surprised at your advice of 10%. You have more experience than to recommend that low of a conservative setting.

PB vs Cortex
 

Kevin,

With PB, the transmitter switch is set at 100%. Think of it as strictly an On-Off switch. This is because of the ability to change gains manually in the Mercury or PB system.
The Cortex and Pro the gains are preset. The Pro can be adjusted in the transmitter, but regular Cortex needs PC. So the transmitter switch the gain is set in the transmitter.

Thanks

I have flown jets for years without gyros. I'm a bit older now and like how they help. Used Demon Cortex in several jets and finally liking the power management to servos with powerbox I have gone that directioon with gyro

Yes we have spoken about F4s before. I have owned several of them and really like the way they fly. I was using Cortex for a while and now have gone to Powerbox with gyro set up. I will try you baseline after trim flights are complete. Hard to believe I've been flying turbines for almost 25 years

Thanks

[QUOTE=RCFlyerDan;12811481]I’m surprised at your advice of 10%. You have more experience than to recommend that low of a conservative setting.[/QUOTE
If we read the question (and he was asking what it says) he asked about Lock Feel. That is the heading hold setting within the normal gyro amount.
So gyro gain could be anything between 20 and 50% to be doing good, but the Lock In is the centre Attitude Assist/Heading hold bit when you let the stick go back to centre.

Dave

[QUOTE=Dave Wilshere;12811530]Thank you Dave,
I now understand. I’m using 5 Mercury SRS, and only one SR2. Six jets actively flying. I’ve been using them for a good 6 years. The SR2 is in my 1/5th SM F-16 is my first iSat, and I’m using 20% Lockfeel and right now only 35% gains but only have 2 flights. It was feeling good after clean trim. So I have little experience with the new iSat. I thought you were recommending 10% gain.
Thank you. Dan

Thanks everyone. I am doing final tweaks before maidens and will try your recommendations after initial trim flights