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nbells · 09-02-2014, 06:36 AM

Can someone explain Differential as used in a DX6I or DX7S.

My parkzone Spitfire (44") has a very quick roll rate and I want to see if I can slow it down.

Will using diff help ? and if so values to start with ?

Bob O · 09-02-2014, 06:41 AM

Differential is not used for roll rates. Sorry, headed to work. Someone else will chime in to help out I'm sure.

Sent via phone

TexanPilot · 09-03-2014, 11:12 PM

I'd use the dual rates to tame it down. It's what I do on my other planes.

And by the way, I just picked up a used PZ Spitfire myself yesterday. Hopefully I'll have a chance to maiden it on Saturday.

Russell Harding · 09-03-2014, 11:35 PM

Differential is used to vary the control surface movement in the up and down directions...

Usually used on gliders to decrease drag or unwanted yaw interaction by having aileron travel limited on the downside of the wing.

Dual rates are the best solution and travel adjust / endpoints are the second. In my experience, planes also tolerate high expo rates (40%) without problems.

JasonJ · 09-07-2014, 05:02 PM

Aileron differential is also for non aerobatic planes like Cubs. In a banking turn differential is used to have more up aileron on the inside wing and less down aileron on the outside wing. What this does is cause more drag on the inside wing which assists in the turn requiring less or no rudder. You wouldn't want differential in an aerobatic plane.

cyjonz · 09-08-2014, 10:18 AM

Quote:

Originally Posted by JasonJ

Aileron differential is also for non aerobatic planes like Cubs. In a banking turn differential is used to have more up aileron on the inside wing and less down aileron on the outside wing. What this does is cause more drag on the inside wing which assists in the turn requiring less or no rudder. You wouldn't want differential in an aerobatic plane.

That is so not true. You need to watch this video to see what differential does. http://www.modelairplanenews.com/blo...how-to-use-it/ The aerobatic plane part is not true.

Skiddz · 09-13-2014, 03:49 AM

Aileron differential is to help prevent adverse yaw caused by the drag of the ailerons.. Typically you set it up with more "up" aileron than "down" aileron.

cyjonz · 09-13-2014, 12:30 PM

My planes are all set up with 40-50% less down.

09-02-2014, 06:36 AM	#1 (permalink)
nbells Registered Users My HF Map location Join Date: Jun 2011	Aileron Differential ? Can someone explain Differential as used in a DX6I or DX7S. My parkzone Spitfire (44") has a very quick roll rate and I want to see if I can slow it down. Will using diff help ? and if so values to start with ? __________________ Nigel. A few little tiddlers ..SR, 300X, TRex 500E Pro with DFC, Trex 700DFC..... and quite a few Planks and Tanks !

09-02-2014, 06:41 AM	#2 (permalink)
Bob O Member My HF Map location Join Date: Dec 2008	Differential is not used for roll rates. Sorry, headed to work. Someone else will chime in to help out I'm sure. Sent via phone __________________ ):>

09-03-2014, 11:12 PM	#3 (permalink)
TexanPilot Registered Users Join Date: Jan 2013	I'd use the dual rates to tame it down. It's what I do on my other planes. And by the way, I just picked up a used PZ Spitfire myself yesterday. Hopefully I'll have a chance to maiden it on Saturday. Last edited by TexanPilot; 09-05-2014 at 10:32 AM..

09-03-2014, 11:35 PM	#4 (permalink)
Russell Harding Registered Users Join Date: Jan 2013	Differential is used to vary the control surface movement in the up and down directions... Usually used on gliders to decrease drag or unwanted yaw interaction by having aileron travel limited on the downside of the wing. Dual rates are the best solution and travel adjust / endpoints are the second. In my experience, planes also tolerate high expo rates (40%) without problems. __________________ Oxy 3 - MSH Mini Protos - MSH Protos Max 700 - Taranis Thanks to Oxy Heli and MSH-Direct.com Former Username: Code3Medic

09-07-2014, 05:02 PM	#5 (permalink)
JasonJ Registered Users My HF Map location Join Date: Jul 2007	Aileron differential is also for non aerobatic planes like Cubs. In a banking turn differential is used to have more up aileron on the inside wing and less down aileron on the outside wing. What this does is cause more drag on the inside wing which assists in the turn requiring less or no rudder. You wouldn't want differential in an aerobatic plane. __________________ 700 size scale Bell Jet Ranger 206BIII, 450 size scale UH-1N, 180 size fpv race/freestyle quad w/Fatshark Dominator V3 goggles, mCPX BL, some edf jets and a plank or two, DX8, AMA# 923167, Clubs: Silver Hills RC, Coeur D Alene Modelers Association

09-13-2014, 03:49 AM	#7 (permalink)
Skiddz HF Support My HF Map location Join Date: May 2006	Aileron differential is to help prevent adverse yaw caused by the drag of the ailerons.. Typically you set it up with more "up" aileron than "down" aileron. __________________ -Kevin No helicopters were harmed in the creation of this post. AMA CD # 7309, Turbine Waiver# RW 890 Click Here For Bergen Intrepid Turbine Build Videos

09-13-2014, 12:30 PM	#8 (permalink)
cyjonz Registered Users Join Date: Jan 2011	My planes are all set up with 40-50% less down.

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