mfd (ap)

[hellsbells1]

took the  talon for its madian today and it came to my notice that when flying in (alt mode) im finding having to reduce throttle to around 30% to fly at 50klm not sure what that could be? It didnt do this on fx61 half stick set the throttle at 50% but in this setup half stick is around 60% ! could it be air speed sensor not calibrated correctly or something else any advice would be great!

                                                       cheers (hellsbells1).

[Coyote]

It's hard to say. It could be your throttle is not calibrated properly. It could be your cruise speed set to some other value in the AP.

[BigT]

Best guess is that the AS is not calibrated or you have a higher cruise speed set. Best to check the AS on as calm a day as possible, fly manually up wind and down wind at the same throttle % and take note of the airspeed. Try not to climb and dive.

[hellsbells1]

thanks guys im thinking ian may have the answer here when i set the preset model (mini talon) when i had a look at the settings the cruise speed is 55klm ive changed that now to 50klm ! I havent tried it yet weather turned nasty so shall give it a test when calmer conditions!. Another thing that i cant get my head around is calibrating air speed adjusting the numbers at the bottom doesnt make sense to me! which numbers are correct and numbers that arent correct? so  increasing the %  - or+ ? not sure about that? Anyway thanks both for the input shall report back.

                                                       regards trevor

[hellsbells1]

Hi guys just to report back  ive sorted to (ass) now and adjusted cruize speed to 50% and thats fine, just cant get this talon to fly straight and level at 50 % throttle it wants to climb so when i apply down trim a few clicks it wants to dive cant get it to fly level an hold altitude? So tried (stb mode) and when i increase throttle it starts dophin affect. Im no expert but regarding settings in ap i dont know were to start ie alt p, cruize d , pitch trim,? My c of g is as recommended on the servo wire and balances perfect. Could it be when i did common calibration didnt raise the nose enough i think i gave it about 10mm maybe it needs more? doesnt say how much in manual  because it loses altitude in stb mode! pretty quick im lost guys? regards trevor     

[Coyote]

Here is a very useful setup video from our old friend Richard.

You go through exactly the same process with any plane, so just copy this.

! No longer available

The AP will not work because of what you said about you can not get it to fly straight and level in manual mode if you can't get it to do that all the future steps trying to set the AP up will be fruitless. Go back to basics to get the plane to fly level in manual mode first.

Also, it sounds like you have way too much mechanical throws on the plane if a few clicks of trim is sending it into a dive.

[hellsbells1]

ok ian thanks funny i was watching this vid today only thing is i dont have in flight tuning setup but that doesnt matter. when i mean it dives after putting down trim in its not that bad but your right need to get it flying nice and level in man mode first . cheers will have another go  later and report back cheers ian for your time . trevor Oh forgot to ask but what happened to richard havent heard or seen anything from him for ages?

[Coyote]

He got on a canal boat and has never been seen again :)

[hellsbells1]

wow! funny i kind of miss him in a way used to enjoy watching his vids and the way he spoke nevermind! Im going back to basics ian like you said  trying to run before i can walk! good advice cheers will report back.

[BigT]

I think as a full size airbus pilot he is probably working away or doing odd hours. With the current relationship between BALPA/CAA/DfT and the hysteria of reported "drone" airprox reports, I would imagine that he would be keeping below the parapets regarding any form of FPV. Probably busy spending his royalties from Immersion/Fatshark

With regard to the trimming issue: try and establish level flight at your chosen cruise speed by manually trimming the plane, reduce the throws mechanically, maybe move the cog forward a tad. Always worth re stating that increased thrust should increase climb rate.

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[FPVSteve]

You mean elmattbo BigT? I think Trevor is meaning Flyboysee.

[hellsbells1]

Hi steve ye flyboysee nice chap used to like watching his vids. Anyway back to basics ive moved the c of g forward to the manual 55mm  i had it sat on the servo wire before but not happy to be honest, shall try again when it gets light, try and get it flying straight and level . regards trevor

[BigT]

Worth mentioning (apologies if you are already doing this) if you make ANY changes to flight surface trims on the radio, I assume you have motor trims turned off, you must do cal joystick before engaging any auto modes. If you don't the AP will go haywire. This is how I got my flyaway. I lost video during a test flight whilst setting up the manual level flight at cruise speed, hit rth but had not done cal joystick so the AP had no idea. Luckily the failsafe kicked in when I turned the tx off and model came down safe in open land.


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[hellsbells1]

Hi there big T well the problem ive had all along is c of g it was recomended to put the c of g on the servo wire so didnt take note that it should of been 55mm not 65mm  so having set the c of g at 55mm it flys so much better in manual mode . So landed done joy cal and tried again this time trying stb mode but it keeps loseing altitude in both the roll and pitch? but not sure if its roll trim that needs adjustment or roll-p? same with pitch. ive trimmed the plane in manual mode so it flys straight the best i can spent alot of time trimming it in manual mode, but in alt mode it doesnt hold altitude well. in both roll and pitch. maybe reset all in osd and start again?. But at least i have it flying so much better in manual mode! regards trevor

[Coyote]

If you have it flying straight and maintaining altitude in manual mode, then it looses altitude in stabilized mode then the AP pitch values need adjusting because what it thinks is level is slightly nose down.

You can adjust the AP pitch trim in the menu, I wouldn't increase / decrease the value more than 2 degrees at a time.