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Old Nov 15, 2012, 09:04 AM
Slip the surly bonds...
Sopwith Mike's Avatar
Christchurch,England
Joined Aug 2004
2,650 Posts
Such an unusual subject! Subbed and looking out for tips!
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Old Nov 15, 2012, 08:14 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.
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Old Nov 16, 2012, 11:29 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.
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Old Nov 17, 2012, 07:51 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
A couple of hours spent, framing up the center wing section.
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Old Nov 18, 2012, 03:55 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.
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Old Nov 19, 2012, 05:17 AM
Registerd Beaver
Smokin' Beaver's Avatar
Australia, WA, Warwick
Joined Jul 2003
3,573 Posts
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
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Old Nov 19, 2012, 06:33 AM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.

david
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Old Nov 20, 2012, 12:09 AM
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conrad907's Avatar
China, Guangdong, Shenzhen
Joined Feb 2012
402 Posts
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.

conrad
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Old Nov 21, 2012, 11:57 PM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.

David
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Old Nov 22, 2012, 12:12 PM
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conrad907's Avatar
China, Guangdong, Shenzhen
Joined Feb 2012
402 Posts
David,

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.

conrad
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Old Nov 23, 2012, 08:43 AM
The "pro" in procrastination
Steve85's Avatar
Canada, ON, Kingston
Joined Mar 2004
2,752 Posts
Very nice wing, David.

Steve
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Old Nov 23, 2012, 11:32 AM
UMs & parkflyers... for now.
davidterrell80's Avatar
United States, VA, Herndon
Joined Apr 2012
2,954 Posts
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.
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Old Nov 24, 2012, 08:13 AM
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conrad907's Avatar
China, Guangdong, Shenzhen
Joined Feb 2012
402 Posts
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?
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Old Nov 24, 2012, 09:15 PM
Heads up...
RMCCOR7737's Avatar
United States, VA, Stafford
Joined Jun 2009
744 Posts
Looking good David...
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