Stearman build

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4 years 7 months ago #22526 by kevinross
Replied by kevinross on topic Stearman build
Started on the stab - Like the rudder, I'm using a continuous wire hinge pin. Also splitting the elevator drive.
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4 years 7 months ago #22538 by kevinross
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Rework of elevators to use wire hinge. Following rudder mods Ive found it better to face the leading edge hinge slots.
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4 years 7 months ago - 4 years 7 months ago #22551 by kevinross
Replied by kevinross on topic Stearman build
progress interrupted today but have now completed the hinging on one elevator. Also close up of the horn drive (these critical parts junctions are silver soldered )
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Last edit: 4 years 7 months ago by Phil Ford.
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4 years 7 months ago #22565 by kevinross
Replied by kevinross on topic Stearman build
The stab to elevator tip mating are inner / outer conical shape which proved awkward. So had to revert to machinery (NOT MY STYLE ! ) so with this former and matching sanders i can get a better mate. I'll probably cut off the current balsa and start again now ive got the method right.
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4 years 7 months ago #22569 by JRI
Replied by JRI on topic Stearman build
Crikey, that is a complex hinge line - do you know if there was an aerodynamic reason to make it so Kevin?

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4 years 7 months ago #22571 by kevinross
Replied by kevinross on topic Stearman build

JRI wrote: Crikey, that is a complex hinge line - do you know if there was an aerodynamic reason to make it so Kevin?


The problem is created because the spar depth tapers at the tips. These pics on the unfinished elevator show what it would look like without that reverse cone shape. So there might be an airflow and drag issue but i suspect its more down to aesthetics.
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