Jigging the fairleads tubes for welding

A forum about all aspects of the construction and maintenance of the Billy Dawson inspired modified Hatz Classic biplane. Here is the place to ask your questions and get the answers from the real experts.
orchardair
Posts: 215
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:
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Thanks in advance.
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.
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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 »

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
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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.
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
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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
Posts: 215
Joined: Thu Apr 08, 2010 4:56 pm

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
Hatz Classic plans# 136
mmarien
Posts: 178
Joined: Thu Jul 23, 2015 9:50 am
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
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Murray Marien - HC 0180
Saskatoon Canada
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