Go Back  RCU Forums > RC Airplanes > Beginners
Reload this Page >

Control throws

Notices
Beginners Beginners in RC start here for help.

Control throws

Old 01-14-2022, 01:21 PM
  #1  
left seat
Thread Starter
 
Join Date: Dec 2008
Location: Brampton, ON, CANADA
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default Control throws

I just purchased a 40 size trainer. Since it was used it didn't have a manual. I need to know how much throw I should have for the control surfaces. Also, I need to find the cg. I have been told to start at the spar or the thickest part of the wing. Which is the correct method? Any help with this would be appreciated.
Old 01-14-2022, 01:50 PM
  #2  
allanflowers
 
allanflowers's Avatar
 
Join Date: Sep 2004
Location: San Diego, CA
Posts: 1,750
Received 23 Likes on 19 Posts
Default

google the manual for it. You probably can find something.
Old 01-14-2022, 02:16 PM
  #3  
left seat
Thread Starter
 
Join Date: Dec 2008
Location: Brampton, ON, CANADA
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Default

This plane, I'm guessing, is around 20 years old and i have no idea who manufactures it. The old covering was very sticky. very strong and thick. I'm almost certain it is an arf because who ever glued the two wings together glued them slightly miss aligned. It is very well constructed, light ply fuse, and 3/8 dowel push rods for the elevator and rudder. My guess is that it was made in Tiawan. So google search for a manual is impossible since I have no idea who manufactures it. The plane was previously flown and was left in a garage when the owner passed away.
Old 01-14-2022, 04:05 PM
  #4  
allanflowers
 
allanflowers's Avatar
 
Join Date: Sep 2004
Location: San Diego, CA
Posts: 1,750
Received 23 Likes on 19 Posts
Default

If you can post a pix, maybe someone will recognize it. Otherwise, measure the chord of the wing and divide by four. That would give you a starting point for the cg. For throws, maybe 12mm up/down for ailerons, 15mm for elevator and rudder? Or you can find a similar size and type of plane and download its manual.
Old 01-14-2022, 05:17 PM
  #5  
Hydro Junkie
 
Hydro Junkie's Avatar
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 9,737
Received 103 Likes on 99 Posts
Default

Something that might also help would be to know the wingspan and aileron configuration. A strip aileron can have a different throw than a barn door
Old 01-14-2022, 05:46 PM
  #6  
Top_Gunn
My Feedback: (6)
 
Join Date: Jun 2005
Location: Granger, IN
Posts: 2,259
Likes: 0
Received 6 Likes on 5 Posts
Default

If, like most trainers, it has a "Hershey Bar" wing (i.e. each wing panel is a rectangle), setting the balance point at about 25% if the wing chord should be OK. That's likely to be near or on the main spar, so setting it there should work, too. If you can post a picture and tell us the wingspan, we can recommend throws.

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 - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.