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Nov 15, 2012, 09:04 AM
Slip the surly bonds...
Sopwith Mike's Avatar
Such an unusual subject! Subbed and looking out for tips!
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Nov 15, 2012, 08:14 PM
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davidterrell80's Avatar
The best reference for my modeling work has been "Airplane Structures" by Niles and Newell (1929). Many examples are wooden structures and the math is spelled out in a way that lends itself to the use of Excel spreadsheets.
Nov 16, 2012, 11:29 PM
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davidterrell80's Avatar
I only made small progress, today, thanks to a migraine headache. I contented myself with finishing the right wing section, avoiding sharp objects as much as possible.
Nov 18, 2012, 03:55 PM
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davidterrell80's Avatar
Only minor work done, as I'm still feeling poorly. I finished the center wing section sanding and attached the right wing. Will be setting up for the left wing.
Nov 19, 2012, 05:17 AM
Registerd Beaver
Smokin' Beaver's Avatar
Well your migraine therapy appears to be a blessing Dave.

Do the plans include any washout at the tips or did they rely on a lot of dihedral for stabilty?

- Phil
Nov 19, 2012, 06:33 AM
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davidterrell80's Avatar
Hi, Phil!
The 25-inch span FF plan calls for 2-inches of dihedral at the tips, breaking at the inboard end of the wing panel. The full scale aircraft had a straight upper spar. The only "apparent" dihedral was due to the decreasing wing thickness. There was also a slight bend up, outboard of the aileron.

As I'm adding ailerons, I'm making the wings almost scale, in this respect.

Nov 20, 2012, 12:09 AM
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conrad907's Avatar
What a nice build so far. Very interesting plane. I have looked at many Earl Stahl plans and imagined enlarging them, they look like naturals for coversion to electric. The RUFE looks great! I am sure you will do this build proper justice.

Nov 21, 2012, 11:57 PM
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davidterrell80's Avatar
Thanks for the kind words, Conrad.

I've built three Stahl FF in the last 30 years. They were all wonderful.

On the Skua, I got more done over the last few days but, with my dominant right arm suffering under this pinched nerve, it has been difficult. I've had good company from my "fuzzy daughter;" she likes to chew on dangling stringers.

I've also had some excitement, with a minor fire in the apartments.

The build continues.

Nov 22, 2012, 12:12 PM
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conrad907's Avatar

I will order that book. It is always good to have a reference to the right way to achieve something as opposed to the,"this looks about right" approach. We have a local aviation museum here that is small, but quite impressive in its own right. I enjoy going into the restoration shop and admiring the engineering put into athe airframes on these old planes. There is a real precise science to it.

Hope the pinched nerve gives you some releif soon.

Nov 23, 2012, 08:43 AM
The "pro" in procrastination
Steve85's Avatar
Very nice wing, David.

Nov 23, 2012, 11:32 AM
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davidterrell80's Avatar
Conrad & Steve, thanks for the nice comments. My arm is better, but still giving me trouble. I sat down and worked on formers, today. I'm debating if I should make the cowling out of the balsa, per the plan, or to make something more durable.

I'm a better builder than I am a flyer and I expect to bang this guy up a time or two. I've made the wing stronger just so it will cartwheel without losing more than the wing tips.
Nov 24, 2012, 08:13 AM
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conrad907's Avatar
Those formers look so good, it is a shame to hide them with covering! Will you have any stringers reinforcing them from side to side?
Nov 24, 2012, 09:15 PM
Heads up...
RMCCOR7737's Avatar
Looking good David...

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