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Discussion in 'Maintenance Bay' started by yhuubert, Jul 13, 2017.
Can you help identify the manufacturer (or exact part no) of this mixture knob:
What is it out of?
If its out of an old Piper it could be anyone from Studebaker to Volkswagon.
Do you need a replacement only for the black plastic bit at the end of the shaft?
Probably anything that fits the same screw will work. A machine shop with a 3D printer could make one to fit the screw.
Somehow I can't open it up The screw just keeps turning around, both when I keep the plastic in place or when that turns also. It's on my Pitts S2, which originally has one without the fine-tuning, which I'd like to keep.
The reason for replacement is that the push-button does not disengage the lock, so currently I can only fine-tune it by turning the knob, which takes ages.
Any recommendations for similar turn + push-button mixture controls, which are good? I assume they are all sold together with cable?
I heard of a titanium door assembly washer that Beech wanted $900 for. They probably need to sell two or three of these every decade, so they don't keep them in stock.
Will we ever be able to make parts like that using a 3d printer, or are 3d printers limited to softer materials, like plastic or nylon?
Surely, a mixture knob could be "printed".