Notices
Crash & Rebuild Post your crash stories, pictures and if you want to document your rebuild you can do that here too!

.

Old 08-18-2003, 08:15 PM
  #1  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default .

.
Old 08-18-2003, 08:17 PM
  #2  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default .

.
Old 08-18-2003, 08:17 PM
  #3  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default .

.
Old 08-18-2003, 08:18 PM
  #4  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default .

.
Old 08-18-2003, 11:04 PM
  #5  
BasinBum
My Feedback: (2)
 
Join Date: Jul 2002
Location: Hawthorne, CA
Posts: 5,839
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

Kevin you should use metal from where the pushrod exits the plane. They sell various lengths of 2-56 rod with the ends threaded.

Also, high rates are generally for slow speed flight and downlines are usually a good time to back off the throttle on aerobatic planes.

On my SE I found the stock control rod material to be very prone to temperature changes effecting it's length. Switch to Sullivan linkage that is less likely to need trim adjustments as the temperature changes. Read the package and it will tell you how much it is affected.
Old 08-18-2003, 11:10 PM
  #6  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default Sig Somethin Extra

Right you are.
Old 08-18-2003, 11:54 PM
  #7  
Katana
Senior Member
 
Join Date: Jul 2003
Location: New hope, PA,
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

i am not surprised that is a lot of work for the servo with the plane going like 75mph
Old 08-31-2003, 08:25 PM
  #8  
Buz_Bo
Senior Member
My Feedback: (1)
 
Join Date: Oct 2002
Location: Prospect, KY
Posts: 214
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

Kevin,

The way the kit goes together the pushrod slides down the tube and then you screw it in leaving the threads exposed at the end. this would have prevented what happened. Look at the instructions.
Old 08-31-2003, 09:47 PM
  #9  
rcfireman
Member
My Feedback: (1)
 
Join Date: Dec 2002
Location: Cypress, CA
Posts: 97
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

Kevin you are correct! I too have the Sig SE, and after looking at the picture I noticed the same thing you did. The metal portion of the pushrod should have been left to the length it was, and NOT cut! By cutting off the metal end just after the threads you are taken out the strength of the rod.

I have numerous flights on my SE (on HR) with No problems. It is a shame that you had to lose this aircraft to learn this lesson. I hope all goes well for you in the future.
Old 09-01-2003, 01:56 AM
  #10  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default Somethin Extra

No, I didn't cut the metal pushrods thats the length they were from the factory. They may have changed them since I built mine. Mine was an ARF built around March. I know the ARF and kit are completely different (wings, wing tube ect) maybe the pushrods are different also that is if yours was a kit. Funny thing is I was planning on replacing the pushrods with all metal but never did. I didn't fly this plane much anymore. After flying larger models little 40-90 size planes are boaring to me.
Old 09-01-2003, 02:30 PM
  #11  
Katana
Senior Member
 
Join Date: Jul 2003
Location: New hope, PA,
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

why were you going full power on a 45 any way?
Old 09-01-2003, 04:09 PM
  #12  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default Somethin Extra

Just to puzzle people like you.
Old 09-01-2003, 05:13 PM
  #13  
Katana
Senior Member
 
Join Date: Jul 2003
Location: New hope, PA,
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

your not puzzleing me going full throttle on a 45 i think its just dumb to do that let me know the reason when you figure it out
Old 09-01-2003, 06:01 PM
  #14  
Swat Cop
Thread Starter
My Feedback: (11)
 
Swat Cop's Avatar
 
Join Date: Feb 2003
Location: Kissimmee, FL
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Default Somethin Extra

Ok D*CK HEAD.
Old 09-01-2003, 06:12 PM
  #15  
Katana
Senior Member
 
Join Date: Jul 2003
Location: New hope, PA,
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

wow you went off
Old 09-04-2003, 08:51 PM
  #16  
flytime56
Senior Member
 
flytime56's Avatar
 
Join Date: Sep 2002
Location: London, ON, CANADA
Posts: 161
Likes: 0
Received 0 Likes on 0 Posts
Default Somehin Extra- Too Much Elevtor Deflection

well that's one of the first things i did when i bought this arf some years back, change thoes pushrods. I found they were way too weak, and would flex. after changing them i now have as much deflection as possible on both rudder and elevator. the rudder now comes close to the elevator, so now need to make some changes to have more deflection.

that's too bad that it happened to your plane. I love this plane and all the stuff that it can do.

GB
Old 09-08-2003, 02:46 PM
  #17  
Bullitt
Member
 
Join Date: Aug 2003
Location: Jacksonville, FL
Posts: 65
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

I am building an SE ARF right now. Have the instructions and the parts sitting in front of me. There are two different sizes of threaded control rods that go onto each rudder and elevator pushrod. There are 1-1/4" rods that attach, with soldered links, to the elevator and rudder servos. There are 3-1/2" ones go on the control surface end of the push rod. You slide them into the pushrods, non threaded ends first, then thread them into the ends of rod. Then you thread a plastic link to it and attach it to the control horns on the elevator and the rudder. The 3", or so, of the control rod that is inside the pushrod keep the pushrod from flexing outside of the model. From the picture it looks as if one of the 1-1/4" control rods made it onto the wrong end of the pushrod, where the 3-1/2" rod should be to prevent the flexing. Hard to tell from the photo, but it sure looks like it.
Old 09-09-2003, 10:19 PM
  #18  
randy41
Senior Member
 
Join Date: May 2003
Location: Charlestown, IN
Posts: 585
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

Something was installed wrong. I built my extra for a kit and it wasnt that away.
the control rods are long enough to screw into the plastic pushrod and keep that
from happening. I got a FA 56 saito on mine and i have put this plane through
3D hell and back and not had that problem on high rates and then some.
Old 09-11-2003, 05:28 PM
  #19  
RONSTERMONSTER
Member
 
Join Date: Mar 2002
Location: Winnipeg, MB, CANADA
Posts: 68
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

Full up elevator at hight speed on high rate would cause a high speed stall . The crash could have broken the supports for the nirods allowing it to flex inside the fuze of the plane
Ron
Old 09-11-2003, 05:38 PM
  #20  
I Got Hit
Member
 
I Got Hit's Avatar
 
Join Date: Sep 2003
Location: Miami, FL
Posts: 78
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

[&:]
I personally dont like and dont use nylon push rods. Just dont trust them and have seen things like that happening before. In addition, if you are concerned with precision, the expand slightly in hot days.
Old 09-11-2003, 08:25 PM
  #21  
Skycam41
 
Skycam41's Avatar
 
Join Date: Sep 2003
Location: Lethbridge, AB, CANADA
Posts: 620
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

Correct me If I am wrong but with those huge control surfaces I do not think this plane was designed for 3D and general aerobatics rather than a flat out speed demon.

Cheers

Mike
Old 09-12-2003, 03:04 PM
  #22  
diehard
My Feedback: (18)
 
Join Date: Jan 2002
Location: Webster, TX
Posts: 25
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

Obviously a problem with the assembly of the push-rods Who would ever believe that the plastic inner tube without the support of the metal rod can move a control surface anyway?
Old 09-12-2003, 06:42 PM
  #23  
Katana
Senior Member
 
Join Date: Jul 2003
Location: New hope, PA,
Posts: 204
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

Okay maybe they didnt use good hardware. But flying on a 45 at full throttle is dumb. its like trying to use airlerons to taxi.
Old 09-12-2003, 07:22 PM
  #24  
mutare23
 
Join Date: Aug 2003
Location: Canberra, AUSTRALIA
Posts: 204
Received 2 Likes on 2 Posts
Default RE: Somehin Extra- Too Much Elevtor Deflection

I would think that people can fly their planes however they like and enjoy it.

I have a couple of quickie 500s for the sole purpose of flying flat out and low enjoying the 'balls to the wall' feeling. I would never risk my pattern babies doing this.

Perhaps the lesson, albeit costly here, is that the better the control linkages then the better the performance of the ependages on the end of those rods.

I bet Kevin will ensure that for the rest of his modelling time his control linkages will be all but nuclear proof and good luck to him to.

Cheers

Phil

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 -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.