IV fuselage repair - measurements

[motortommy]

I have a crashed and repaired fuselage. Although the plane has been in service flawlessly for years since then, I don`t like the workmanship of previous owner. Welding is awful, no splices and metric tubes were used. Further additional `improvements´ were made:confused:
Goal is to get the fuselage back in original state as much as possible referring to AC43.13

1. What is correct tube size (green) of the longerons. OD is 1/2", but unsure about wall?
2. Does anybody have a bare, undamaged IV fuselage handy and could help me with some measurements in case? No rush!

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[patrick.hvac]

I can tell you that the model 5-7 in that location is .5" OD and .050 wall.

[109JB]

On a Kitfox IV they are 0.035" wall thickness.

[motortommy]

Thanks!
Unfortunately 4130 tubing is sold out at the moment (Germany)...have to wait.

Like more pics? Here is the bent mess...:mad:
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previous repairman added triangle braces and steel stringers side and bottom, maybe to strengthen his welding skills:rolleyes:

[LuckyFox]

On a Kitfox IV they are 0.035" wall thickness.


Is this the wall thickness of the tubing used on the vertical stabilizer as well? I would like to add height to my IV.

Robert

[motortommy]

anybody out there with a genuine (not crashed) fuselage?
I want to replace some parts of the lower longerons due to improper repair. Questions:
- are the longerons one piece till the tail?
- is the longeron shape gently bowed (like #1) below or is the longeron divided in sections with straight tubes angled (like#2)
Hope you got what worries me...

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[Mark Mills]

Marc:
Lower longerons are like #1, curved.
I have a Model IV fuselage that is not yet built from an unstarted kit. I can get you specific measurements.28871

[motortommy]

Hi Mark,
thanks for reply and pic. Could be that I will bother you with some measurement requests :rolleyes:

[Mark Mills]

Hi Mark,
thanks for reply and pic. Could be that I will bother you with some measurement requests :rolleyes:

Please do, the fuselage is out and easy to access. Happy to help.