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Mar 23, 2020, 11:27 AM
Registered User
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quick bi-plane wing question - which way to stagger


not that I am expecting too much from this "thing" anyway, but is it OK to stagger the top wing backwards, instead of forwards?
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Mar 23, 2020, 11:30 AM
Scratch builder
yes, see Beechcraft model 17 staggerwing
Mar 23, 2020, 11:31 AM
Registered User
Thread OP
duh....I had it in my head the staggerwing was forward....LOL. Not enough coffee. Thanks Ken.
Mar 23, 2020, 12:46 PM
treefinder
springer's Avatar
More coffee! Always good!
Mar 24, 2020, 04:54 AM
gpw
gpw
“There’s no place like Foam”
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Just remember the most forward wing ( whether top or bottom ) will have more positive incidence , so it will stall first , dropping the nose while the other wing is still flying … Stall recovery …
Latest blog entry: Lost plans
Mar 24, 2020, 07:03 PM
Scratch building addict
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I'm not sure the forward wing needs to stall first, but that would make sense in theory I guess, since it would move the effective cg forward ?

But I know the bottom wing should have higher incidence and stall first, that way the plane effectively becomes a high-wing parasol type plane giving much safer stall behavior. In my experience however, a model biplane with the same incidence on both wings flies just fine and doesn't have crazy stalls.
Mar 25, 2020, 04:56 AM
gpw
gpw
“There’s no place like Foam”
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OK, the Forward wing stalls first, making the plane Noseheavy , the nose drops , preventing the stall, the rear wing still flying … That’s how it works !!! Your choice !!
Latest blog entry: Lost plans
Mar 25, 2020, 05:36 AM
Learning to make
Hehe, this is how I'm imagining it.


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