RC Warbirds and Warplanes Discuss rc warbirds and warplanes in this forum.

ESM LA-7 CG help?

Reply
Old 05-27-2012, 04:23 PM
  #1
Jonboy2
Thread Starter
 
Join Date: Oct 2003
Location: Denver, CO
Posts: 166
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ESM LA-7 CG help?

Finishing up a ESM LA-7 Lavachkin that I hope to maiden later this week. Trying to get the CG dialed in. The manual says 168mm back from leading edge. I have read in some forums that 160mm back is good while others have said 155 to 150mm back. Please, anyone with any experience with this bird please post your thoughts. I do appreciate it. Thanks Jon
Jonboy2 is offline  
Reply With Quote
Old 05-28-2012, 03:43 AM
  #2
Dash7ATP
 
Dash7ATP's Avatar
 
Join Date: Mar 2002
Location: Smithfield,, VA
Posts: 1,008
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ESM LA-7 CG help?

Try to start at around 28%of MAC.

Too far forward and it should fly but may feel nose heavy be sluggish in pitch.

Too far aft and it may require a rebuild.

Good luck.

Dash
Dash7ATP is offline  
Reply With Quote
Old 05-28-2012, 10:26 AM
  #3
AZThud
 
Join Date: May 2011
Location: Litchfield Park, AZ
Posts: 206
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ESM LA-7 CG help?

Hi I have 50 plus flights on mine now and I have the CG at 150 ish could be 153 or so. The ground handling at this is good and it tracks like its on rails, elevator is as close to 0 degrees as my eye can tell after trimming it out. I will say this however inverted flight needs a deliberate push forward and slow roll need some forward stick to check the noses desire to head for the ground. As Dash said if you too far foreward with the CGplane flys bad and is sluggish is pitch, to far back plane flies once! :-) I would suggest you try 150 / 155 and see, its easier to move it back than to rebuild it!



Link to flight Video of mine

http://www.movingmoment.net/La7.wmv


Cheers
AZThud is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
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



All times are GMT -8. The time now is 08:32 AM.