Jigging the fairleads tubes for welding

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orchardair
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Joined: Thu Apr 08, 2010 4:56 pm

Jigging the fairleads tubes for welding

Post by orchardair »

Hatzers,

I am looking for creative ideas on how to jig the tube that holds the fairlead while I weld it.
Not having asbestos hands, I am afraid this idea won't work:
Capture.JPG
Thanks in advance.
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Hatz Classic plans# 136
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Bitshifter
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Re: Jigging the fairleads tubes for welding

Post by Bitshifter »

I used the small 90 degree welding magnets from Harborfreight.
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mmarien
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Re: Jigging the fairleads tubes for welding

Post by mmarien »

I used a rod to hold it in place. Also helped to align it.
20191205_144006 (small).jpg
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Murray Marien - HC 0180
Saskatoon Canada
orchardair
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Re: Jigging the fairleads tubes for welding

Post by orchardair »

Murryay
The rod was a great idea.
I got these from ACS: Part# 05-15051 MFR Model# M-035-000 And I think they'll work well.
Here are the 3/4" length of 7/8" tube tack-welded:
fairleadTubes.JPG
I took a string between the rudder pedal and the rudder to figure out the best placement for them, and the middle ones (in station 82.5 / 84) turned out to be much higher than the plans call for. makes for a straighter line to the rudder.
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Hatz Classic plans# 136
mmarien
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Re: Jigging the fairleads tubes for welding

Post by mmarien »

I did the same thing, but ended up changing them to fit the stringers better. Dang!
Murray Marien - HC 0180
Saskatoon Canada
orchardair
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Re: Jigging the fairleads tubes for welding

Post by orchardair »

Did you place the fairlead tube in station 82.5 inside or outside of the longeron line? Your picture seems to suggest it is on the outside, but I think the plans show it on the inside.
mmarien wrote:I did the same thing, but ended up changing them to fit the stringers better. Dang!
Hatz Classic plans# 136
mmarien
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Re: Jigging the fairleads tubes for welding

Post by mmarien »

It's on the outside. I redesigned the turtle deck and stringers. I'm only using five stringers and a wood turtle deck but I made my plane is a little fatter and rounder than the Classic. I was able to run the rudder cables on the outside all the way to the back. I put fairleads at Sta 84 and 151
20200629_153032(1).jpg
20200717_161500.jpg
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Murray Marien - HC 0180
Saskatoon Canada
orchardair
Posts: 215
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Re: Jigging the fairleads tubes for welding

Post by orchardair »

Very nice!
Hatz Classic plans# 136
orchardair
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Re: Jigging the fairleads tubes for welding

Post by orchardair »

I am now thinking that another (pair of) fairleads need to be installed between stations 45 and 82.5
I just don't see how according to the plans you don't get the rudder cable rubbing on the diagonal members that converge at 70" between those stations
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mmarien
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Location: Saskatoon, Saskatchewan, CANADA

Re: Jigging the fairleads tubes for welding

Post by mmarien »

This picture from the Makelan CD shows the fairlead in front of Sta 82.5
fuselage.jpg
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Murray Marien - HC 0180
Saskatoon Canada
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