Wattflyer RC Network: RC Universe :: RCU Magazine :: RCU Forums :: RCU Classifieds :: RCU User Reviews :: RCU YouTube
Home Who's Online Calendar Today's Posts RealTime Post Spy Mark Forums Read
Go Back   WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > General Electric Discussions
Register Members List Wattflyer Extras Articles Search Today's Posts Mark Forums Read Social Groups

General Electric Discussions Talk about topics related to e-powered RC flying

Thank you for your support (hide ads)
Reply
 
Thread Tools Display Modes
Old 06-21-2014, 02:50 AM   #1
garyp1029
Member
 
Join Date: Mar 2014
Posts: 57
Thanked 0 Times in 0 Posts
iTrader: (0)
Friends: (0)
Default Dynam Waco Aileron/Rudder Mixing

I have never tried mixing on any plane and wonder if the Waco would benefit from aileron/rudder mixing. If so, what would be your suggestion as to the proper degree/amount of the mix? How about switching from a non-mix on takeoff to a mix during flight? Thanks. Gary
garyp1029 is offline  
  Reply With Quote
Old 06-21-2014, 12:00 PM   #2
fhhuber
Super Contributor
 
fhhuber's Avatar
 
Join Date: Mar 2013
Posts: 2,030
Thanked 196 Times in 187 Posts
iTrader: (0)
Friends: (1)
Default

Aileron-rudder mix is typically used to combat "Adverse Yaw" which is generally worse for flat bottom (or under-chambered) airfoils and low airspeed.

In many cases its better to use differential aileron throw than to use the aileron-rudder mix unless you are trying to correct for trims needed when doing knife-edge (when you'd mix rudder to aileron to counter the rudder trying to roll the airplane)

You can use the aileron-rudder mix for low speed flight where you might experience adverse yaw and turn the mix of for higher airspeed.... That can help some aircraft, especially for landing approach. But even then, the use of differential is superior to use of aileron-rudder mix in most cases.

Many computer radios have a differential aileron function which can be put on a switch. Check your radio's instructions.

Differential can be done mechanically or electronically.

Mechanical differential is VERY EASY: (especially with one servo per aileron as with all of these Dynam models)
If the aileron horn is on the bottom of the wing (as with all of the Dynam models) center the servo then adjust the arm so it is pointed forward somewhat (more forward = more differential) Then the linkage will give more push than pull and the aileron will move up more than down.
Match the amount for both sides.
If the control horn is on top then you angle the servo arm back instead of forward

Simple and very effective.

The issue being addressed is a tendency to have the downward moving aileron add so much drag that the airplane might tend to yaw opposed to the commanded direction of applied aileron. In extreme cases this can cause the airplane to turn opposed to the direction desired and applying more aileron trying to get the desired response would just initiate a snap into a spin.

If you are not noticing a problem with adverse yaw there is no reason to do the aileron-rudder mix or to use differential ailerons.
(If it ain't broke then don't fix it)
fhhuber is offline  
  Reply With Quote
Old 06-21-2014, 06:25 PM   #3
JetPlaneFlyer
Super Contributor
 
JetPlaneFlyer's Avatar
 
Join Date: Mar 2009
Location: Aberdeen, Scotland
Posts: 4,256
Thanked 471 Times in 439 Posts
Awards Showcase

5kW  Outstanding Contributor Award  1kW 
iTrader: (0)
Friends: (8)
Default

Or just use your little used left thumb to apply a bit of rudder in the turns
JetPlaneFlyer is offline  
  Reply With Quote
Old 06-21-2014, 10:00 PM   #4
mclarkson
Super Contributor
 
mclarkson's Avatar
 
Join Date: May 2010
Location: Wichita, KS
Posts: 2,790
View mclarkson's Gallery4
Thanked 170 Times in 168 Posts
Awards Showcase

Scratchbuilders Award  Outstanding Contributor Award 
iTrader: (0)
Friends: (7)
Default

Originally Posted by JetPlaneFlyer View Post
Or just use your little used left thumb to apply a bit of rudder in the turns
I knew that was coming.

mclarkson is offline  
  Reply With Quote
Old 06-21-2014, 11:22 PM   #5
fhhuber
Super Contributor
 
fhhuber's Avatar
 
Join Date: Mar 2013
Posts: 2,030
Thanked 196 Times in 187 Posts
iTrader: (0)
Friends: (1)
Default

But... you can't ask people to actually fly the airplane.
fhhuber is offline  
  Reply With Quote
Old 06-21-2014, 11:41 PM   #6
mclarkson
Super Contributor
 
mclarkson's Avatar
 
Join Date: May 2010
Location: Wichita, KS
Posts: 2,790
View mclarkson's Gallery4
Thanked 170 Times in 168 Posts
Awards Showcase

Scratchbuilders Award  Outstanding Contributor Award 
iTrader: (0)
Friends: (7)
Default

And that.

mclarkson is offline  
  Reply With Quote
Old 06-21-2014, 11:54 PM   #7
JetPlaneFlyer
Super Contributor
 
JetPlaneFlyer's Avatar
 
Join Date: Mar 2009
Location: Aberdeen, Scotland
Posts: 4,256
Thanked 471 Times in 439 Posts
Awards Showcase

5kW  Outstanding Contributor Award  1kW 
iTrader: (0)
Friends: (8)
Default

Joking aside. I really do think using the left thumb is by far the best approach to rudder 'mixing' in turns. I'm not anti-computer Tx mixes, I use them on all my models for certain things, but the advantage of using your thumb in turns is that you aren't stuck with a fixed rudder input but can vary rudder deflection as required through the turn. Probably more important is that under use of rudder is the biggest failing in RC flying for many if not most flyers, so anything to get the lazy thumb working is a good thing.

Dont take my word for this. Scott Stoops is a world class aerobatic flyer of both RC and full size aircraft and the author of the worlds best book on RC flying (IMHO). The book is called "The Pilot's Guide to Mastering Radio Controlled Flight"

Here's a quote from the book:
Another mission of mine is to increase the manipulation of the left stick by RC pilots...... The rudder is without question the most underused and misunderstood control we have. You've got a throttle and a rudder, lets lean how to use them
JetPlaneFlyer is offline  
  Reply With Quote
Reply

  WattFlyer RC Electric Flight Forums - Discuss radio control eflight > Electric R/C Airplanes > General Electric Discussions

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dynam Waco Ground Tracking garyp1029 General Electric Discussions 1 06-19-2014 07:00 PM
Dynam Waco Motor Failure garyp1029 General Electric Discussions 6 06-11-2014 11:00 PM
Dynam Waco ESC to Battery Connector garyp1029 General Electric Discussions 5 05-24-2014 06:40 AM
Dynam Waco vs Tiger Moth garyp1029 General Electric Discussions 2 05-04-2014 02:04 AM
Mini-Review: Dynam T-28 Trojan from Nitroplanes Maladroit Warbird Electrics 11 03-11-2012 10:19 PM


All times are GMT +1. The time now is 04:27 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 WattfFlyer.com
RCU Eflight HQ

Charities we support Select: Yorkie Rescue  ::  Crohn's & Colitis Foundation



Page generated in 0.18376 seconds with 33 queries