Four servo wing full trailing edge mix for Dx7
Detail re use of P Mix 5 and 6 for Dx7 trailing edge mix
Just in case the forum link should die at some stage, some extracts of this useful chat are pasted below, with appreciation to the modelflying UK forum:
Spektrum
DX7 Program For Four Servo Wing
Gives flaps linked to ailerons for increased roll rate, ailerons
linked to flaps for full wing camber, and crow braking (using the throttle
stick) with elevator compensation.
This program is based upon setting the ailerons as flaperons
The instructions are for a 6 channel receiver.
If using a 7 channel receiver you can substitute Aux2 for GEAR
which then leaves the GEAR channel free.
Please note that the programmable mix numbers used MUST be exactly
as stated, as 5 and 6 give a different effect to 1,2,3, and 4
Ailerons
Enable flaperon mixing
Right aileron to AIL channel
Left aileron to AUX1 channel
Flaps
Disable gear switch by setting gear servo travel to 0%,0%
Right flap to GEAR channel
Left flap to THROTTLE channel
Set up PMIX5 as THROTTLE master to GEAR slave with setting of
100%,100%
This links both flaps together.
Crow braking
PMIX1 throttle master to elevator slave for crow braking elevator
down compensation.
Rates are top 0%, bottom – whatever you need for your required
down elevator compensation.
Offset value +100%. This sets the “mid point” of the throttle to
stick full up and crow is activated by pulling the throttle stick down.
PMIX2 throttle master to flap slave. As the ailerons are set up as
flaperons, the flap channel controls the ailerons as flaps. This gives both
ailerons up movement for crow braking.
The throttle stick drives the left flap directly and as the flaps
are linked by PMIX5, both flaps will move when the throttle stick is moved.
Full wing camber
The ailerons are set up as flapperons – use the flap system
setting for the correct amount of camber and reflex, operated by the 3 postion
flap switch.
Set the aileron travel first.
PMIX3 flap master to throttle slave this is the flap movement for
camber and reflex.
As the flaps are linked by PMIX5, both of them will move.
Flaps moving with ailerons
PMIX4 aileron master to gear slave – moves right flap with
ailerons.
PMIX6 aileron master to throttle slave – moves left flap with
ailerons.
Had a bit of luck - well a lot of luck
really- in setting up my Typhoon slope soarer in that I managed to achieve crow
breaking, ailerons moving with flaps for full wing camber, and flaps moving
with ailerons for increased roll rate.
There was one puzzling thing
which worked very much to my advantage so today I "borrowed" the
receiver and battery from my Fusion and investigated.
Programmable mixes 5 and 6 are
different to 1, 2, 3 & 4 in that the trim levers will adjust both the
master and slave servos.
There is another benefit of this
feature.
With a mix set up on either 5 or 6, and
a further mix on 1, 2 , 3 or 4 set up with the master of the first mix as
slave, then both master and slave of the first mix are activated by the second
mix.
As an example, the flaps of my slope
soarer are set up on the throttle and gear channels with p-mix 5 linking them
together (throttle master and gear slave) so that both flaps move from
the throttle stick.
The ailerons are set up as flaperons so
that they work off the three position flap switch to alter wing camber.
I have p-mix 2 with flap master
to throttle slave which links the ailerons (working as flaperons on flap
channel) to flaps (on throttle and gear channels) to give full wing camber.
Because the throttle and gear are
linked on p-mix 5, and p-mix 2 has the throttle (p-mix 5 master) as
slave, both flaps move together.
I originally discovered this by pure
accident and it saved me a very valuable p-mix.
It only works if the first p-mix is on
5 or 6 and the second p-mix is on 1, 2, 3 or 4.
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