JR Venture 30 and FUTABA radio combo

[Tim Daley]

I need a little advice.....

I am new to the RC heli world, so bear with me. I recently purchased
a Venture 30 kit and am pairing it with a Futaba 6XAS radio system
that I had bought over a year ago. It supports helis so it saved me a
little cash. The Futaba web site says that the 6X*S (both 6XAS and
6XHS) radios have (4) swash types and both support CCPM. I checked
that before choosing not to buy a new JR radio. I actually bought
better JR servos to install on the copter, but am using the Futaba
receiver and transmitter.

Here's where I have an issue. If anyone has a similar copter/radio
combination, you may know what my question is. There is no swahplate
setting in the radio that matches what I have on the copter. The
closet one (SR3) is 180 degrees off of what I have. This seems to be
causing an issue that I cannot figure out how to resolve.

The collective input appears to be correct. Left stick forward,
swashplate goes up. And vice versa. When I use the right stick for
for/aft cyclic and left/right cyclic (or aileron and elevator inputs)
they seem reversed. I still have to be careful as well that if I want
to produce forward motion then I am looking for increased pitch from
the main rotor blade when 90 degrees in front of rear most position.
The gyroscopic thing is tricky. Anway, when I take the right stick to
the right, the swashplate tilts to the left. This cause the main
rotor pitch to appear reversed if wanted to move the copter to the
right. If I reverse both the left and right servo, then the
collective reponse will be screwed since the swashplate will now start
tilting with left stick input. This JR and Futaba combination appears
to have created a tricky problem.

DOES ANYONE KNOW HOW TO SOLVE THIS?

What would happen if I switched to location of the left and right
servos in the receiver? They happen to be channel 1 and 6. Wouldn't
this reverse the operation of the swashplate (not the servos) without
having to reverse the servos themselves? Also, since both travel in
the same direction when collective input is given, this would not be
affected. This is a PRELIMINARY thought and I have not tried it. I
am asking since I do not understand what esle will be affected. I am
too new to copters to look that far ahead. ANY INPUT from the EXPERTS
????

If that will not work, what is the solution, other than buying a JR
radio (which I may be better off doing)? Someone has to have crossed
this bridge already?

Any advice / criticism is appreciated. I scan diagrams of the
swashplate diagrams if necessary, but I figure someone already knows
my issue.

Tim

[Mike]

>Subject: Re: JR Venture 30 and FUTABA radio combo
>From: tfdaley@yahoo.com (Tim Daley)
>Date: 03/11/03 04:18 GMT Standard Time
>Message-id: <3fa5d66c.17835175@news1.news.adelphia.net>
>
>On Mon, 03 Nov 2003 03:18:09 GMT, tfdaley@yahoo.com (Tim Daley) wrote:
>
>It appears that I have partly answered my question. I tried switching
>the left and right servos. As expected, this solved the left and
>right input issue, but didn't solve the fore and aft issue. For the
>same reason that this didn't affect the collective, it did not solve
>the fore and aft movement. To correct this, ALL servos need to be
>reversed, since the front servo is rising and the two rear servos are
>dropping with a forward right stick. If I reverse all, this fixes the
>fore and aft input, then makes the collective input backwards and the
>left and right input backwards as well.
>
>Is it time to write a check for a JR transmitter and give in to the
>fact that JR and Futaba cannot play in the sand box together?
>
>I do not know how to solve this. Any suggestions?
>
>Tim
>
>>
>>If that will not work, what is the solution, other than buying a JR
>>radio (which I may be better off doing)? Someone has to have crossed
>>this bridge already?
>>
Tim,

I think the answer lies in a function of your radio that you haven't found yet.
I would be very surprised indeed if it was a mismatch between Futaba and JR,
and you have to think positive on this one!

I can't advise you on the Futaba radio, but certainly on the JR you have a
function whereby you can change the values of movement of the swash, even to
the point of going minus.. this effectively means you have the flexibility to
change the direction of each servo in hundreds of combinations!!

On JR the default values are 60percent swash movement, this allows then for a
further 40% movement when cyclic is applied. So you should go through your menu
options looking for this particular function (ask yourself what controls how
much the servos move up and down).

It may be best to set the cyclic movements first, reversing servos as required,
then using the function you have (hopefully) just found, change things around
so the swash rises and falls in the correct way.

The answer is there somewhere....

[Vince]

Tim
I have the 6XA and a Caliber 30 and I use the sr3 setting and my machine is
180 out from the diagram in my Futaba manual.
The answer lies in the AFR setting (Ajustable Function Rate,not explained at
all in the manual) and is accessed by getting to the swash setting and
hitting the cursor button.
That will let you set the AFR for ch1(aileron) press it again for
ch2(elevator) and again for ch6(pitch).
My Caliber manual (it had instructions for our radio even if they were just
a bit flawed) had me set at ch1-65%,ch2-65%,ch6+65% and everthing was
backwards.
I took a chance(well,not really) and reversed the polarity of each setting
and it worked. You can also get more or less of each control response by
adjusting the number.
Sounds like you need to connect your servos normal and reverse the AFR
settings for ch1 and ch2.
I got stumped by the 90 degree ahead of phase on the cyclic thing too.
Read my post "Caliber 30 Setup Questions" on 10/28
Got three tanks hovering now!
Good luck
Vince

PS Another thing about the Futaba manual
when setting up the pitch curves, the last setting (PI-H) is said to be
hovering pitch.
As best as I can tell this is really the pitch curve that will be used when
the throttle hold switch has been activated.

[Scoots]

This helped me a lot - old post, but thanks much for the info!