jair

Hi everybody,
what servos would you suggest?I think four 5945 for the elevons and one 5735 for the canards should be more than ok, or what do you think?
What about only one 5945 per elevons?

If you use two 5945, would you split the huge elevons?

thanks,
jair

tamjets

My Feedback: (2)

I fly with 1 5945 on each elevon.
So far got over 30 flight not even a single problem.

jair

What engine do you use?Weight of your ES?
Thanks,
jair

tamjets

My Feedback: (2)

P-120 with bifurcated pipe.
Dry weight 23 lb.

Nick Yuhasz

My Feedback: (11)

I'm using two (2) Hitec 5945's on each elevon, but did not "split" the elevons (I'm using Tam's method - program a larger "dead zone" so they don't fight each other).

P-120 powered, dry weight 27 lbs, 10 oz.

Hope that helps.

lov2flyrc

My Feedback: (24)

I am using a single JR8411 but a buddy is using dual 5945's with split elevons.... Seems to work fine but would not have split the elevon if it was mine..... Splitting caused some hinge issues on the bottom side that were difficult to fix

Todd

jair

Thanks!

I´ve ordered 5945´s with programmer.....can you tell me wht "dead zone" means, and how you programm it?What are your parameters?

jair

Nick Yuhasz

My Feedback: (11)

Here is the "dead zone / band" explanation from the Hitec Programmer manual:

2. Dead Band:
This will allow the width of the neutral point to be changed from 3μs - 48μs.
What is dead band width and why do I want to program it?
The dead band width is configured in microseconds or "μìs".
It is the "space" the neutral point takes up. The larger the number,
the wider the dead band will be. Large planes and surface vehicles
often will "gang" several servos together on one control surface.
It is important that these servos have matched dead band widths to
avoid having them "fight" each other at the center point.
a. To adjust this feature push the input button and the programmer will
search for the settings; X:Y will appear with X being the current setting
and Y is adjustable from 1-16. The value of "1" is about 3μìs and is the
smallest dead band width setting available.
b. With the knob, select the Y setting you want and "M" button to
change the setting.
c. "One" is the tightest dead band width setting and provides the best
centering but will also cause the servo to beep quite a bit,
the wider the dead band the less beeping you will get around center.
d. Press Input to exit

jair

And what´s your dead zone ? Or do you have to try it?

Nick Yuhasz

My Feedback: (11)

I believe I set mine to 10 microseconds (I think Tam did too). You can experiment and set them so they don't "buzz" at neutral. You still have to set up the EXACT linkage geometry on both before setting the dead zone.

Mr-Nat

Guys

Don and I's Euro has 2 5945's on each surface and the surfaces are split.
This arrangement has saved the bird in that the right outboard servo would hang in a full deflected position for a second or two.
the first two times I interpeted the sluggish response to approaching a low speed stall as I was just completing some 3D type of manouvers. The third time,I was in level flight when the outboard surface deflected up initiating a right roll. I knew that I didn't do that but I was able to roll left back to level,although slugglish, and with more throw than normal from the stick. Landed the AC without further incident. On the ground we confirmed that the rt outboard would intermittently stick or deflect on its own.
I feel that a single surface,single servo might have possibly caused the loss of the AC during the 3rd incident as the duration of the servo failure was about 3 seconds. That coupled with lower altitude and higher airspeed may found the dirt first before a recovery could be effected.A correcting left roll command would have cause essentially an overall full up elevon command as the failed right elevon was full up and the left would have gone to up with a full left roll command .The AC may have been inverted by that time.
Two servos may have not deflected a non split elevon but rendered no ability to move as long as the bad servo was in failure mode effectively blocking the good servo's action.
Yes 4 servos and split surfaces are more expensive and more time consuming and more difficult to set up, but I feel that it is worth the effort.
As long as all parts are working,its a moot point.

Nat