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Jeff J
 Post subject: Flap return wire
PostPosted: Fri Feb 23, 2018 8:51 am 
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Location: eastern OK
I was replacing the flap springs last night and noticed the wires (pn 631-2), especially the right one, are getting corroded and pitted. I don’t think I would like to have only one flap deploy so I am thinking it’s time for new. The drawing calls for .09 hard steel wire. Are people using hinge pin to make these?

Thanks

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"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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fytrplt
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 10:12 am 
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Location: Lakeland, Florida, USA
Local hobby shop might have what you need.

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Jeff J
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 10:43 am 
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I don’t have a local hobby shop unless you count a 2 hour drive as local. I do have about 6 feet of piano hinge with the hinge pin. If I need something else I can call Spruce and have them add it to the order I placed last night.

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Thorp T18
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"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Bill Williams
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 11:10 am 
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The local ACE Hardware carries several sizes of piano wire,maybe try them


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Rich Brazell
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 2:32 pm 
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Try Cubes . Thorp Central probably has them ready made . I got mine from Classic Sport which is now Thorp Central . ;)

RB O0


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Jeff J
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 5:23 pm 
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Thorp Central is a valuable resource to be sure but I have been having some problems matching their stock to a 44 year old hand built aircraft of a different model. In some cases it has been deviations from the drawings in others it has been differences between the models. What I am looking at today is a deviation for sure. I haven’t checked the S-18 drawings yet to see if there is a difference.

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Thorp T18
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68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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TonyNZ
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 5:36 pm 
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A bit of copper coated welding rod 1/8" works well.

Tony Schischka
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TonyNZ
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 5:38 pm 
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Ops, I used that as the link between the spring and the flap, not the spring!
Tony


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Jeff J
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 8:52 pm 
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I just went ahead and used the hinge pin. It’s fairly strong and there isn’t a lot of pressure on it even when the flaps are full down. If I auger it in with one flap extended then we will know I was wrong.

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Thorp T18
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68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Rich Brazell
 Post subject: Re: Flap return wire
PostPosted: Fri Feb 23, 2018 9:27 pm 
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I am always right at least 50% of the time ! :P

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1albee
 Post subject: Re: Flap return wire
PostPosted: Sat Feb 24, 2018 12:33 am 
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RB does that make you left the rest of the time ???
Phil
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Jeff J
 Post subject: Re: Flap return wire
PostPosted: Sat Feb 24, 2018 3:31 pm 
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I am surprised no one called me out on my comment about only one flap deploying.

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Thorp T18
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68x74 Sterba Propeller

"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Rich Brazell
 Post subject: Re: Flap return wire
PostPosted: Sat Feb 24, 2018 4:09 pm 
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Nothing gets past me ! You wouldn't be the first T-18 to have split flaps on landing . ??? I can think of one S-18 ( not mine ) that pulled it off . :P

RB O0


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Bill Williams
 Post subject: Re: Flap return wire
PostPosted: Sat Feb 24, 2018 4:18 pm 
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I don't think it would happen. I had my right flap stick down after retracting the flaps , on takeoff I would hear a "thump" and it was the flap coming up due to the airflow The airflow over the wing would keep the flaps up. I would think you would be in deep DODO if you had them extended and a cable broken letting one flap retract


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James Grahn
 Post subject: Re: Flap return wire
PostPosted: Sat Feb 24, 2018 9:36 pm 
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You could eliminate that connector. I have springs that are unfinished on one end. They are about 14" long. Just bend as desired.
Cubes


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