Bushwacker
3DRCF Moderator
Well I guess I will just have to try it both way's and see. Thank you for the feedback. 
65" Vyper Discussion Thread
- Thread starter SnowDog
- Start date
Bushwacker
3DRCF Moderator
Finally got my airframe back from 3dhs and this time UPS didn't munch it. This one is perfect or as close to as you can get. Hardly even a wrinkle or bubble on it. The Fit & Finish is awesome. So now I just need to put her back together and NOT CRASH this one.
Many thanks to 3DHS for a no drama return and sending the new model back so fast. :clap:
Many thanks to 3DHS for a no drama return and sending the new model back so fast. :clap:
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3dmike
640cc Uber Pimp
That's great man! Way to go 3DHS!
Bushwacker
3DRCF Moderator
Hey Guy's,
Which servo arm did you wind up using on the pull pull system? These Hitec HS7954SH servos came with 2 sizes. The larger is about 32mm and the shorter one is about 26mm. Measured from center mounting hole to center of outer most hole on the arm. I only ask in hopes of taking some guess work out it. Never ran this type setup.
Thanks much.
Which servo arm did you wind up using on the pull pull system? These Hitec HS7954SH servos came with 2 sizes. The larger is about 32mm and the shorter one is about 26mm. Measured from center mounting hole to center of outer most hole on the arm. I only ask in hopes of taking some guess work out it. Never ran this type setup.
Thanks much.
Bushwacker
3DRCF Moderator
Your right I measure from center hole of servo arm where the output shaft goes to the last hole on the arm.
I just did a dry fit. Meaning I didn't crimp the wires down and it looks like I will get about 50 degrees both ways.
So it looks like the longer of the two is the one I need.
I just did a dry fit. Meaning I didn't crimp the wires down and it looks like I will get about 50 degrees both ways.
So it looks like the longer of the two is the one I need.
SnowDog
Moderator
For the pull pull rudder setup you will normally want a 3" double servo arm arm - you can see from the photo (which is from the build manual) the length of the arm relative to the width of the fuselage.
KEEP IN MIND: the Vyper has a HUGE rudder...you won't need much deflection to see significant impact on flight. I do knife edge flight with only a hint of pressure on the rudder stick.
so if you don't get 30-45 degree deflect on the rudder...don't worry...you don't need it (at least right away).
Based on the way you fly I'm hoping you have the control surfaces with minimal deflection on low rates for your first flights, so the length of the rudder servo arm is not going to be an issue.
HTH
-Mike
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Bushwacker
3DRCF Moderator
Yes it will be some time if ever I would need that much rudder the way I fly or ever as we have seen...LMAO! and I did lower my rates even more. Normal mode DR/Expo on Rud is 60/75 The image below looks pretty much the same as yours. Did you use the arms that came with your servos?
