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Switching to electric gliders from fixed wing large scale electrics

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15 hours ago, Jonathan M said:

On a non-scale four-servo wing competition thermal glider the following is normal:

  • Flaps normally move as a proportion (say 50%) of aileron movement.
  • In Thermal Mode an equal amount of camber is applied to both flaps and ailerons.
  • In Cruise Mode both flaps and ailerons are flush with the wing root, i.e. in a neutral position.
  • In Speed Mode an equal amount of reflex is applied to both flaps and ailerons.
  • The amount of camber (say a few mm max) or reflex (just a mm or two) is normally specified by the designer/manufacturer as a starting point, then can be tweaked by the flier to suit their own flying style.
  • Selecting between flight modes is normally done using a 3-position switch, although some fliers like to then have the exact amount of Thermal Mode camber further adjustable via a slider (but only active when that mode is selected).


This is all good advice, but to be honest I would not bother with quattro flaps (the jargon name for mixing in your flaps with the ailerons) initially. You will have plenty of aileron effectiveness without it for the test flights, and a you need to be able to understand how much rudder to use in the turns initially without that additional variable IMO (as a beginner to high a/r gliders you may even decide you want a CAR - coupled aileron and rudder - mix , though I personally much prefer to do it with my thumbs!).


You can always add in quattro later as a scwitchable "Acro" flight mode, but for thermal and general cruising it's generally more efficient to do without it. 

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Quattro flaps is a step to far for me at the moment, Matty.  As you say and I agree, I think to start off with I will see how much rudder I need to feed in when turning using the current settings I have dialled in. As I have said before simplicity is key for me and to start with I prefer to manage with the two sticks on the TX to steer flight rather than scrabble around for various switches 😳. The sophistication comes later I guess and I found Jonathan's explanations very helpful 👍


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I took a look at the starboard wing again. I put a straight edge along the aileron and flap and they are perfectly straight After another close look at the wing it seems that the end section of the wing is out of alignment. What to do? I adjusted the working surfaces so that the flap, aileron were in a straight alignment to the root and just left the difference on the tip end. I don't know what the effect will be. Time will tell when I get her in the air.


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Final bit of tidying up. I decided to add extension leads from the RX to the ailerons and flaps for connecting to the wing leads therefore keeping disturbance to the RX at a minimum when connecting up. Blue thread locker on all connections and secured the RX to the fuselage side with velcro. 

I secured the folding prop and ran the motor up at full chat for a short burst - all seems well there. Just need to get used to the routine of rigging for flight at the field .......


Edited by Adrian Smith 1
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