Go Back  RCU Forums > RC Airplanes > Questions and Answers
Reload this Page >

Engine Down Thrust

Notices
Questions and Answers If you have general RC questions or answers discuss it here.

Engine Down Thrust

Old 01-15-2007, 02:01 PM
  #1  
mnrcaerobat
Senior Member
Thread Starter
My Feedback: (197)
 
Join Date: Oct 2003
Location: Minnetonka, MN
Posts: 1,249
Likes: 0
Received 0 Likes on 0 Posts
Default Engine Down Thrust

When flying my Sig Wonder, I need quite a bit of down elevator to fly level. I was just wondering if I should add some down thrust to the motor and if so, how do I determine how much I need?
Old 01-15-2007, 02:04 PM
  #2  
Geistware
Senior Member
My Feedback: (16)
 
Join Date: Apr 2002
Location: Locust Grove, GA
Posts: 12,942
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Engine Down Thrust

Does the amount of down elevator needed changes with from WOT to idle?
If yes, then up/down thrust is needed.
Old 01-15-2007, 04:27 PM
  #3  
mnrcaerobat
Senior Member
Thread Starter
My Feedback: (197)
 
Join Date: Oct 2003
Location: Minnetonka, MN
Posts: 1,249
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Engine Down Thrust

I have only flown it twice, but it seems like it was ok to land. I fly WOT all the time, so I know that was good. I'll fly it some more and see how it is.
Old 01-16-2007, 12:56 PM
  #4  
hrrcflyer
 
Join Date: Apr 2006
Location: Carrollton
Posts: 1,698
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Engine Down Thrust

mnrcaerobat,

Try this. Fly your plane horizontally until it gets right in fornt of you and pull it straight up into a vertical attitude. TRhen take your hands off the sticks and see which way the plane pulls. If it pulls towards the bottom of the plane, then it does need down thrust. In case you don't know, the easiest way to change the thrust on your motor is to add a thin washer between the motor mount and the firewall, depending on which way you want the plane to go. But remember this, make the changes gradually. Then try the above maneuver after you make the change. You're probably not going to need a very thick washer to correct the problem.

Fly safe and have fun!!!
David
Old 01-19-2007, 03:08 PM
  #5  
hrrcflyer
 
Join Date: Apr 2006
Location: Carrollton
Posts: 1,698
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Engine Down Thrust

mnrcaerobat,

I apologize for any confusion, but my last post in response to your question is backwards from what it should be..
If the plane pulls toward the bottom of the fuse, it has too much down thrust.

Fly safe and have fun!!!
David

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 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.