Stearman build

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13 May 2020 13:44 - 13 May 2020 13:45 #22455 by kevinross
Replied by kevinross on topic Stearman build

MikeSeale wrote:

kevinross wrote: the pax plate is approx 1/8. with 1.7mm holes for 16swg piano wire.

Youve got to love this metric world we live in


Perhaps i should have quoted the paxolin is approx 3.27mm thick and the holes are drilled with No 51 !!
Last edit: 13 May 2020 13:45 by kevinross.

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13 May 2020 20:40 #22458 by simondean
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Excellent work, most time is spent thinking through a design and checking everything’s right before committing materials.
And a lot of patience

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14 May 2020 12:03 #22475 by kevinross
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Making a rudder tiller that doesn't distort is a problem on a Stearman due to its slope. The first pic is from the parts catalogue.

I fabricated this from two pieces go 0.5mm stainless which i formed concave,( eg see last pic ) then silver soldiered the edges to create hollow arms
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14 May 2020 12:30 #22477 by Brian
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I envy your patience Kevin, at least the rudder horns will be visible, seems a pity that so much of your engineering will be hidden.

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14 May 2020 12:41 #22478 by Phil Ford
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Brian wrote: I envy your patience Kevin, at least the rudder horns will be visible, seems a pity that so much of your engineering will be hidden.

Yes, but Kevin will know it is excellent and works. ;) All this stainless and aircraft quality ally!

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16 May 2020 21:56 #22514 by kevinross
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Fin and rudder finally complete. Had to add a lot of reinforcement to support the revised tiller.
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17 May 2020 21:42 #22526 by kevinross
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Started on the stab - Like the rudder, I'm using a continuous wire hinge pin. Also splitting the elevator drive.
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19 May 2020 00:01 #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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19 May 2020 22:12 - 20 May 2020 11:25 #22551 by kevinross
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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 )
.
Last edit: 20 May 2020 11:25 by Phil Ford.
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20 May 2020 18:55 #22565 by kevinross
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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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