RC Radios, Transmitters, Receivers, Servos, gyros Discussion all about rc radios, transmitters, receivers, servos, etc.

8103 throttle curve setup

Reply

Old 08-09-2004, 09:22 PM
  #1  
Smokey
Senior Member
Thread Starter
My Feedback: (16)
 
Join Date: Mar 2002
Location: Bronxville, NY
Posts: 796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 8103 throttle curve setup

Can somebody tell me how to set up my 8103 that it softens the throttle especially from idle to about 1/4 way up. It is very sensitive and makes it hard to do certain maneuvers. A step by step account would be greatly appreciated.

Thanks
Smokey
Smokey is offline  
Reply With Quote
Old 08-10-2004, 03:23 AM
  #2  
Red B.
Senior Member
 
Join Date: Aug 2002
Location: Jonkoping, SWEDEN
Posts: 1,301
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Since I don't have a 8103 I don't know how to do it by programming the Tx but its easy enough to do by introducing mechanical differential as one does to get differential ailerons. Basically what you have to do is to rotate either the servo arm or throttle arm so that they are not parallel with each other.

The differential setups shown below will soften throttle at low RPM.

/Red B.
Attached Thumbnails Click image for larger version

Name:	Fc90336.gif
Views:	13
Size:	2.5 KB
ID:	162292  
Red B. is offline  
Reply With Quote
Old 08-10-2004, 07:20 AM
  #3  
Ed_Moorman
My Feedback: (1)
 
Ed_Moorman's Avatar
 
Join Date: Jan 2002
Location: Shalimar, FL
Posts: 4,059
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Mix Throttle to Throttle using mix 1 or 2. these are the multi-point mixes. Press Select to get to the area where you can adjust the amount, then cut the movement down using the + or - key. Channel moves you to the next point and adjust movement there. You can set a switch to turn it on and off in the air to try it, then set it on all the time.
Ed_Moorman is offline  
Reply With Quote
Old 08-10-2004, 08:38 PM
  #4  
Smokey
Senior Member
Thread Starter
My Feedback: (16)
 
Join Date: Mar 2002
Location: Bronxville, NY
Posts: 796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Ed....I have my radio infront of me and I have the arrow on Point-L and its set at -100 value. My question is that i want to soften the area between idle and 1/4 up. Do I set my trottle stick all the way down and then lower the -100 value? Or should i advance the trottle 1 or 2 clicks up and then reduce the -100 value? About how much do i reduce that value? Sorry that im asking alot of questions. Im lost on how to do this setup.

Thanks
Smokey
Smokey is offline  
Reply With Quote
Old 08-11-2004, 07:22 AM
  #5  
Ed_Moorman
My Feedback: (1)
 
Ed_Moorman's Avatar
 
Join Date: Jan 2002
Location: Shalimar, FL
Posts: 4,059
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Press channel to get over to position 1, I think-it's the next one over from L. Then press + or - to lower the value. As for how much, you'll have to play with it. You might try tieing your plane down or having someone hold it, crank up and try your throttle with the mix up. Then you can adjust the mix and play the throttle again. I have heard of some of the experts adjusting while in the air, but that's a little too much for me.
Ed_Moorman is offline  
Reply With Quote
Old 08-11-2004, 05:28 PM
  #6  
Airbike
Senior Member
My Feedback: (6)
 
Join Date: Mar 2003
Location: Walnut, CA
Posts: 636
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Smokey,
First set all five points (L, 1,2,3,H) to 0

Think of this mix as a modifying mix to the throttle servo output.
When all points are 0, the output is not changed. Neg values decrease the output and pos values increase the output.
Now, to slow down or soften the response on my gas engines, I use negative values in points 1,2 & 3.

Point L and H should be set to zero so the low point idle (and cutoff) and full throttle are not changed.

I use (0, -7, -11, -15, 0 ) to give a more linear feel to the throttle. Gassers tend to develop power during the first half of the throttle opening, whereas, the second half only adds a little more power.

You'll have to just put in some numbers and see how you like the feel. Adjust as necessary.
Airbike is offline  
Reply With Quote
Old 08-12-2004, 06:17 PM
  #7  
Smokey
Senior Member
Thread Starter
My Feedback: (16)
 
Join Date: Mar 2002
Location: Bronxville, NY
Posts: 796
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

Thanks to all who helped.

Smokey
Smokey is offline  
Reply With Quote
Old 05-19-2005, 01:03 PM
  #8  
RC_DESI
Senior Member
My Feedback: (44)
 
Join Date: Sep 2003
Location: Keller, TX
Posts: 164
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 8103 throttle curve setup

OK, After reading all the posts & suggestions, I tried setting the throttle curve on my 8103 (non DT) on my DA50 with 23x8 on it.

However the values that I have been able to set (to get the required throttle reponse) is VERY differennt from what you guys have recommended

I'm using P-Mix# 1 (Throttle->Throttle)

Point | IN | OUT | ENGINE RPM (Appx)
--------------------------------------------------
L | 0 | 0 | 1500 (IDLE)
1 | 25 | -30 | 2500
2 | 50 | -60 | 4000
3 | 75 | -80 | 5000
H | 100 | 0 | 6500 (WOT)


I understand that Gas Engines behave diff from Glow & generate 3/4 of their power in the first 1/2 opening of the carb plate/valve etc.

I just wanted to verify if anyone else has set theirs on a DA50 & what settings/values are they using?

Also is there any drawback of using such large values? (Servo travel is 100% both ways)

Thanks,
--Arvind

RC_DESI 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