Don Szczur

My Feedback: (1)

Contra-Rotating Propellor causes very sensitive rudder inputs due to no spiral slipstream blocking right hand side rudder and elevator and wing blocking left side rudder (this is my understanding, if anyone has a wind tunnel and would like to test that would be very educational). In any event, rudder expo set high at 90 percent plus for smooth center control of rudder. Mixing in knife edge has little effective throw for straight knife edge flight but with high expo has large deflection at end of stick. Requirement for F3A Unkown maneuvers such as knife edge cuban 8 and knife edge vertcal 8 as was in 2013 U.S. Nationals finals sequence. The result of pattern aircraft plus some giant scale craft is non-linear knife edge mix for extreme deflections. One feature of DX 18 https://www.spektrumrc.com/Products/...rodId=SPM18100 is origin mixing which provides more mix near center rather than at the edges of stick deflection.


Origin Mixing (page 29)
Origin Mixing uses true
stick position as the
input for a mix. When
origin mixing is selected,
any other settings to the
master channel will be
ignored and the mix will
be based strictly on stick position and trim position. When Aileron,
Elevator, or Rudder are selected as the master, origin mixing is
available. Once Aileron, Elevator, or Rudder are selected, an N will
appear next to the master channel, where N means normal. Roll
and select the N to change to O for origin mixing. Next, select the
slave channel and set the switch and mix rates as desired.

Don Szczur

My Feedback: (1)

And then expo added, multi point ORIG mixing throttle to right elevator, then throttle to up elevator (to counter the down elevator on the edge of the stick). Excellent results.

Don Szczur

My Feedback: (1)

The contra does not require large side area aircraft for knife edge cuban 8, vertical eights and knife edge triangles.