JR Radio & Spektrum Radios Discuss all your JR and Spektrum gear.

xp8103 mixing for three throttles

Reply

Old 04-10-2004, 09:57 AM
  #1  
jchumley
Senior Member
Thread Starter
My Feedback: (1)
 
jchumley's Avatar
 
Join Date: Dec 2002
Location: Dunkirk, MD
Posts: 381
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default xp8103 mixing for three throttles

Hello Danny:

I have built a rediculous airplane that requires the use of three throttle servos. I am having trouble getting the mixes right. Here is what I think I need to have happen:

1. mix throttle and spoiler for the right engine
2. mix spoiler and spoiler to cancel out the spoiler switch
3. Mix throttle and gear for the left engine
4. mix gear and gear to cancel out the gear switch

Every time I try, I end up with end points that are not correct and limited movement of the mixed throttles. Here is how I am doing it:

1. Set the throttle travel: H=0, L=148 (odd but it works)
2. set spoiler endpoints for correct travel: +71% on top,-69% on bottom
* at this point all is well. The center engine has correct travel, the right engine has correct endpoints with spoiler switch (not using pot)
3. Mix throttle to spoiler ? (currently +125, +67)
4. Mix spoler to spoiler ?(currently -100, -100)

If I set up spoiler to spoiler prior to throttle to spoiler, I can make the spoiler switch inert by trial and error so that the throttle lever on the engine is halfway between full and idle. Then when I mix the throttle, I can get it to go to idle but it won't pass the halfway point on the way to full.

Help me please! I have t ried every combination I can think of except the one that works.

Jeff
Attached Thumbnails Click image for larger version

Name:	Rp44853.jpg
Views:	9
Size:	158.8 KB
ID:	120664   Click image for larger version

Name:	Hc91826.jpg
Views:	8
Size:	62.3 KB
ID:	120665   Click image for larger version

Name:	Bg92856.jpg
Views:	6
Size:	56.2 KB
ID:	120666   Click image for larger version

Name:	Tn33295.jpg
Views:	6
Size:	65.3 KB
ID:	120667  
jchumley is offline  
Reply With Quote
Old 04-11-2004, 07:38 AM
  #2  
jchumley
Senior Member
Thread Starter
My Feedback: (1)
 
jchumley's Avatar
 
Join Date: Dec 2002
Location: Dunkirk, MD
Posts: 381
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: xp8103 mixing for three throttles

NEVERMIND! I figured it out. It was the H=0, L=148 in the throttle travel adjust settings. I changed it to H=74, L=74 to keep the delta the same and, with a sub trim adjustment, it solved the problem.

Thanks,

Jeff
jchumley is offline  
Reply With Quote
Old 04-12-2004, 01:38 PM
  #3  
dsnyder
 
dsnyder's Avatar
 
Join Date: Jun 2002
Location: Champaign, IL
Posts: 9,365
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: xp8103 mixing for three throttles

Great to hear you got it working! Let us know if you have any further questions.
dsnyder is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service