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Questions tagged [biplane]

Airplane with 2 wings stacked on top of each other.

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1 answer
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What should be decalage angle for high lift to drag ratio biplane glider?

Assuming hypothetical biplane variant of a modern conventional glider, wingspan of 8m, 1m separation between the wings, no stagger, no struts, what should be the decalage between the wings assuming ...
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15 votes
1 answer
412 views

Help ID a biplane my Dad flew as a late 1920's barnstormer

My Father flew this ship. Can you help ID it. Photo was taken at the de Havilland Moth Factory Can't figure out what the heck it is, Looks like the tail of a DH-60 Consolidated PT-1 "N" ...
user74946's user avatar
  • 153
8 votes
2 answers
545 views

Advantages of an inverted sesquiplane?

A biplane whose lower wing is significantly shorter in span than the upper is sometimes called a sesquiplane, from sesqui "one and a half." One whose upper wing is shorter (even slightly, ...
Camille Goudeseune's user avatar
2 votes
1 answer
230 views

Help identify symbol of vintage biplane seaplane wing

I recently bought a "Vintage" biplane seaplane model from an Etsy shop. The images on the listing didn't include an unobstructed view of the top of the wings. When I received it, I found ...
GooseHandler's user avatar
7 votes
1 answer
272 views

What is this early biplane?

This is a 1910-1920 biplane that landed at Oregon Agricultural College. now Oregon State University. I've cropped out some of the people and horses. Thank you[]
William Gilbert's user avatar
11 votes
1 answer
617 views

Help identifying my great grandfather’s biplane

I was wondering if anyone could identify the plane my great grandfather (Francis W. Reed) is standing in front of? The picture was probably taken in Indiana.
Tman's user avatar
  • 111
8 votes
2 answers
316 views

Identify the Albatros in this photo

I posted this question in History SE: https://history.stackexchange.com/q/71705/60022. And it was suggested that I post a related question here. I'm a member of Austin Sängerrunde which is a German ...
B. Goddard's user avatar
2 votes
1 answer
451 views

Is this method to calculate a biplane's center of gravity using 57% of the biplane's gap and 23% of each wing's MAC correct?

Once you have the MAC for both wings and the CG balance point as a percentage of the MAC. connect the two CG positions with a line. Measure up between the wing Gap distance and place your center of ...
Wally's user avatar
  • 31
3 votes
1 answer
259 views

Can someone identify this biplane from 1920-21 taken in Arkansas?

Can someone identify this biplane? It was taken in late 1920 or early 1921 when my grandfather was barnstorming in Arkansas. My grandmother and aunts are also in the photos. Additionally, can someone ...
Bill Shaffer's user avatar
2 votes
0 answers
168 views

Human powered biplane for maximum endurance

Biplanes have lower minimum power and material strength demands. However these slow planes have worse glide ratios and thus distance-based fuel consumption. Today with high performance engines and ...
Kevin Kostlan's user avatar
7 votes
1 answer
390 views

What biplane of the Army Air Reserve is in this picture?

This is the second example of the biplanes they flew. Can anyone identify this biplane flown by the 476th pursuit squadron "The Black Falcons" of the 322rd pursuit group of the Army Air ...
Bill Shaffer's user avatar
6 votes
1 answer
258 views

Can anyone identify this Biplane flown Army Air Reserve stationed at Clover Field, Santa Monica, California in mid the 1920's?

Can anyone identify this biplane flown by the 476th pursuit squadron "The Black Falcons" of the 322rd pursuit group of the Army Air Reserve stationed at Clover Field, Santa Monica, ...
Bill Shaffer's user avatar
8 votes
2 answers
408 views

Can anyone identify this biplane in 1940s Orange, MA?

The picture was taken at Orange Municipal Airport in Orange, MA, in the 1940's. I can't identify the logo either.
Mola Ram's user avatar
17 votes
3 answers
2k views

Can anyone identify this crashed Swallow biplane?

Can anyone identify the model of this Swallow biplane? On August 14, 1929, my great grandfather, Humphrey Woods, was fatally injured in the crash of a plane piloted by Thomas Tobiason. The plane was ...
Steve's user avatar
  • 171
9 votes
4 answers
593 views

Take-off and landing a Waco Standard Cabin QDC

I'm sure you hear it all the time: Someone's writing a book and want to know how to fly a plane. I'm no different in that regard. However, I have a specific plane: a Waco Standard Cabin QDC, 1931. ...
Noelle Alexandria's user avatar
14 votes
1 answer
578 views

Can anyone identify this biplane with distinct wind screen?

I'm trying to identify the aircraft in this photo of my great grandfather. The photo would have been taken during the mid to late 1920s, possibly early 1930s. He lived in Utah (not sure this helps?). ...
ArtofCory's user avatar
  • 141
4 votes
2 answers
422 views

What is this biplane from an old photo?

Can anyone identify this biplane.
Tom Vesely's user avatar
24 votes
1 answer
3k views

Can you identify this 1920s or 30s biplane?

Can you identify this aircraft from the 1920s or 30s I think? On the back of the photo it says “Taken at Nanking, after flying from Hong Kong to Shanghai”. I don’t know who the pilot is. My ...
Andrew Jackson's user avatar
4 votes
2 answers
774 views

What justifies a biplane over a braced monoplane?

Biplanes became the first airplanes to enter service due to their structurally efficient design being more suitable for the weak materials then. This efficiency comes from the two wings acting as the ...
Abdullah is not an Amalekite's user avatar
11 votes
1 answer
2k views

Identify this USAAF biplane

I have been unable to match this USAAF biplane with a similar photo mainly due to the cockpit canopy. I've found no other like it. I believe the photo was taken at Madison, WI or Chicago, IL in the ...
FreshBreeze's user avatar
  • 1,221
15 votes
4 answers
4k views

Why are/were there almost no tricycle-gear biplanes?

A friend recently asked me: are there any tricycle-gear biplanes? After hunting around, we found the Waco AVN-8, but that's all. This causes me to ask: is there an aerodynamic or other design ...
Jemenake's user avatar
  • 319
2 votes
4 answers
586 views

Wing dihedral in a biplane

Would a biplane be able to fly if the upper and lower wings were in opposite dihedral? Imagine a wing configuration similar to the fictional "X-wing" design from StarWars. What would be the ...
skanga's user avatar
  • 165
33 votes
1 answer
4k views

What is the make and model of this biplane?

This photo is of one of my friend's great grandfather: We wish to commemorate a museum in his name as he was a highly regarded person in his area, so we wish to show this photo in the museum with ...
Preet's user avatar
  • 333
4 votes
1 answer
2k views

Can anyone identify this biplane from a TV show?

Could someone help identify this biplane from a TV show, please? No other scene / camera angle is available though.
TJP's user avatar
  • 251
2 votes
1 answer
287 views

What was the lift-to-drag ratio for WWI biplanes?

I will be interested to know what was the lift-to-drag ration for a few more known WWI biplanes at take-off, cruise and landing speed; with the propeller running, stopped or non existent (tests in ...
klausweber's user avatar
23 votes
1 answer
5k views

What is this strut in biplane rigging, attached only to wires, not bearing any load?

A few biplanes like the Stearman have a strut parallel to the fuselage, halfway along the rigging's landing wires and flying wires, not fastened to the airframe, not bearing any obvious load. One on ...
Camille Goudeseune's user avatar
1 vote
1 answer
200 views

Would supersonic bi/tri/multiplane wings have less lift interference drag than a subsonic version?

Biplane wings interfere with each other, reducing the total lift often to about only 20% more than a mono wing of the same chord and span. But at supersonic speeds - say, Mach 2, where Mach angle is ...
Abdullah is not an Amalekite's user avatar
1 vote
2 answers
573 views

Does bi-wings create essentially double the uplift as single wings?

This puzzles me a bit, and I cannot find the answer anywhere. Does bi-wings create essentially double the uplift as single wings?
Will's user avatar
  • 11
10 votes
1 answer
583 views

Can anyone identify this biplane from 1920s-1930s?

It was my grandfather's, but he is no longer around to ask. He lived in Nebraska.
Russell Francis's user avatar
16 votes
3 answers
6k views

Why does wingwalking use only biplanes?

Wingwalking is an aerobatic discipline with shows such as this one. The definition of wingwalking from Wikipedia gives no other alternative than using biplanes: Wing walking is the act of moving ...
Manu H's user avatar
  • 16.5k
5 votes
1 answer
877 views

Can anyone identify this plane?

Can anyone please help me identify this biplane? The photo was taken in Newcastle, NSW, Australia. I can’t seem to find anything.
Steve Bartlett's user avatar
3 votes
2 answers
307 views

Would it be a good idea to use dihedral on a biplane?

My engineering class uses model plane kits to build "frankenflyers" which use parts from multiple model planes to make one plane that will carry a maximum load (pennies). I was wondering what the best ...
John's user avatar
  • 31
16 votes
2 answers
2k views

What is this RAF biplane, and where was the photo taken (possibly in the 1920s)?

My grandfather is in the middle row. He joined the RAF as a boy entrant in 1920. He served in Iraq 1924-27 and India 1927-29 so I suspect by the uniforms this is from one of those postings.
tim091's user avatar
  • 341
3 votes
1 answer
221 views

Would a 2nd row of distributed props on a 2nd staggered wing of a biplane increase its efficiency?

Would a 2nd row of distributed props on the rearward wing of a biplane with 25% gap and 150% negative stagger increase the efficiency of a biplane ULTRALIGHT, 25MPH, Re 500K? ( rear wing is 25% lower ...
Fred's user avatar
  • 1,393
7 votes
2 answers
566 views

What kind of antique WWI aircraft model is this? Inventor's prototype?

I've discovered an interesting WWI era model of an aircraft and I am trying to find out what could it be. It is 29" long and it looks like not a hobby model, but an inventor's prototype. I love the ...
Romak's user avatar
  • 81
4 votes
1 answer
436 views

Is the "wing area" of a biplane the projected area or the total area?

When you specify the wing area of a biplane, do you specify the planform area (the projected area) or do you specify the effective area of both the wings?
Gaurav's user avatar
  • 103
5 votes
2 answers
502 views

What is the function of cross bracing of interplane strut?

Pic 1 is the top and lower wing of a biplane called Bloop Ultralight,what is the function of the cross bracing between the interplane struts as seen in pic 1(I'm not talking about landing and flying ...
Jessica Ham's user avatar
3 votes
2 answers
662 views

Can anyone identify this biplane?

This biplane from the 1930s is from an English airshow. Can anyone identify it?
Phil S's user avatar
  • 143
7 votes
1 answer
1k views

Can anyone help identify this old 1930s plane?

I would like to identify this plane, if anyone can help? All I can tell you is that it is from an old photo album and probably an English Airshow in the 1920's or 1930's.
Phil S's user avatar
  • 143
6 votes
2 answers
568 views

Any biplane flying wings after 1914?

Were any biplane flying wings built and flown after the 1912-1914 variants of the Dunne D.8? If not, why? Wikipedia mentions merely that this type was too stable and insufficiently controllable, but ...
Camille Goudeseune's user avatar
3 votes
1 answer
152 views

Why are no HAPS (High Altitude Platform Station) solar planes of a biplane design?

HAPS are fragile due to weight constaints, e.g. NASA’s Helios. Biplanes are more robust. Although biplanes have high drag, HAPS only need to move slowly because at their operating height the wind ...
Desmond Campbell's user avatar
1 vote
2 answers
1k views

What is the function of interplane strut of a Biplane?

What kind of load does the interplane strut(s) carry,is it compression, tension or shear? In order words,what's their function and how do you calculate the force that the interplane strut carries?
Jessica Ham's user avatar
2 votes
2 answers
515 views

Compression and tension members of a biplane wing

I get why the upper wing of a biplane is a compression member (because the flying wire is attached to it at an angle) but what I fail to understand is why the lower wing is the tension member of a ...
Jessica Ham's user avatar
2 votes
4 answers
1k views

How does the "pendulum effect" affect biplanes?

A high wing airplane will correct itself (lateral stability) when disturbed because its c.g. is below the c.p. (looking at the plane from it's side), according to this forum post and the book below. ...
Jessica Ham's user avatar
8 votes
1 answer
1k views

Lift distribution on biplanes

This Wikipedia page about biplanes says in a wing of aspect ratio 6, and a wing separation distance of one chord length, the biplane configuration will only produce about 20 percent more lift than ...
Jessica Ham's user avatar
4 votes
2 answers
741 views

What is the make and model of this plane?

I came across this picture taken in the late 1920s. Could you please help identify the make and model of this plane. Thanks.
user40892's user avatar
2 votes
1 answer
283 views

Which aircraft is this?

I was curious if someone could help me gather some more info on this aircraft. I have looked it up in the FAA.GOV site and it does not match. Is there a way to find out info on this plane that flew ...
Justin's user avatar
  • 21
4 votes
1 answer
682 views

What's this biplane built by a 16-year old?

I was told that this plane was built by a 16-year old in the 90s. Ever since, I've been bent on finding the specifications, name, etc., of this airplane with no success.
David Teahay's user avatar
  • 2,895
31 votes
2 answers
10k views

Has a commercial or military jet bi-plane ever been manufactured?

Are there any, or have there ever been any commercial/military jet bi-planes? What would be some of the major advantages vs disadvantages if one was built? Electric radio controlled ducted fan model. ...
jwzumwalt's user avatar
  • 11.5k
2 votes
2 answers
381 views

Do any Waco aircraft have model names?

Many aircraft manufacturers give names to the aircraft models. Piper had the Cub, Super Cub, and all the Comanche/Cherokee/Navajo/etc. names used in branding. Cessna has the Skyhawk, Skylane, etc. ...
dreyv's user avatar
  • 21