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Control horn question. - 6/19/2008 3:13:01 AM   
Sessholvlaru



Posts: 260
Joined: 5/2/2006
From: West Caldwell, NJ, USA
Status: offline 		Hello again everyone. I have my completed and customized 16 pound, 1.60 powered KMP Sea Fury nearly ready for its maiden flight. I do have a few questions for you guys. In order to get a cleaner final appearance, I did not use the control horn plates (the flat plastic piece that would be on the top of the surfaces that accepts the two long fine threaded screws). Instead, I used two allen headed wood screws that are 3/4 of an inch long to secure each horn. All of the surfaces have solid wood blocks into which the screws are anchored. I thin CA'ed the holes and the screws tighten very snuggly with no strippage. The wood seems to be hard balsa. I have pulled on them with generous force and they do not budge. Do you think that this setup is safe to fly? Or is reinforcing needed? Anyone have success like this? Thank you!

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When you stare into the abyss, sometimes the abyss stares right back into you.
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RE: Control horn question. - 6/19/2008 3:33:45 AM   
Laird SS


 

Posts: 227
Joined: 4/17/2005
From: Peoria, AZ, USA
Status: offline 		It would be shame to lose a beautiful plane because of something so trivial. You can't duplicate the conditions the control horn will see just by pulling on it or the screws holding it. What about the vibration it sees?

(in reply to Sessholvlaru)
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RE: Control horn question. - 6/19/2008 4:10:25 AM   
Sessholvlaru



Posts: 260
Joined: 5/2/2006
From: West Caldwell, NJ, USA
Status: offline 		You are right....maybe just needed someone else to say that. I am in the process of putting them on now....I will just hit them with some paint to hide them a bit. Thank you.

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When you stare into the abyss, sometimes the abyss stares right back into you.

(in reply to Laird SS)
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RE: Control horn question. - 6/19/2008 4:11:15 AM   
khodges


 

Posts: 5094
Joined: 7/3/2003
From: newton, NC, USA
Status: offline 		If the wood blocks you mention are hardwood (not just hard balsa) and are well attached to the frame of the control surface, you should be okay. Did you fiberglass the surfaces? That would help prevent tear-out.

I do this on my scale models (omit the back plate) but I build in a hardwood plate, screw the horn down to the plate and skin the surface around it, which hides the front plate, all you see is the arm of the horn.

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Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?

(in reply to Sessholvlaru)
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