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WonderousMountain

Well-Known Member
Joined
Apr 10, 2010
Messages
2,096
Location
Clatsop, Or
Greetings HBA,

I have obtained a small shed, month to month. Will be pursuing the four winged bi-tandem winged little monster in metal.

Taking engine suggestions, for light adequate power. Back in college, not much related to planes, but gotta get them credits rolling.

Writing Comp is probably the most important of my classes. Will post pictures of progress.

Wing area 120sqft,

square prism bodied,

metal truss construction,

solo placed, tadpole gear.


Out for now, thanks sky brothers.
 

WonderousMountain

Well-Known Member
Joined
Apr 10, 2010
Messages
2,096
Location
Clatsop, Or
I guess this got lost in space while.

It's a commuter type committed to light weight, low fuel consumption and useability. Additionally, I would like to keep the span under 20 ft, have retracted gear and removable outree panels.

LuPi
 

lr27

Well-Known Member
Joined
Nov 3, 2007
Messages
3,822
This is still pretty sketchy. No gross weight, no desired performance, no sketch of how much room for engine and prop, and so on.
As far as square feet of wing, that's not a very useful piece of info by itself. This airplane has 120 square feet of wing area:
Fly-baby-cruising.jpg
This one has even less, only 98, but it has a gross weight more than 4X higher, and a cruise that's closer to 4x than 3X faster:
2_480.jpg
This one has 130 square feet, but needs only 1/3 as much power and has a gross weight less than half of the first airplane:
wpd4820c83_05_06.jpg
This one has 140:
csm_Miles_M100_Student_01_ec4c92467c.jpg
These have about 196 square feet each, so I guess you'd have to use two of your engines per plane:
Lockheed-F-104-USAF-Squad.jpg

Ok, ok, I'm a bad person. But it was fun.
 

BJC

Well-Known Member
HBA Supporter
Joined
Oct 7, 2013
Messages
11,732
Location
97FL, Florida, USA
Didn't you mean 96 square feet on the '104s???

196 would seem to be a better number for the whole formation in the photo :)
I had the same reaction, but the enclosed fuselage area is significant. The average chord is close to 9 feet.


BJC
 

WonderousMountain

Well-Known Member
Joined
Apr 10, 2010
Messages
2,096
Location
Clatsop, Or
Some interest in constructing this.
Pretty rough sketch, no doubt, and
the original studio has parts deleted.
Taking off the upper - outer empanage,
It's a trim wing, not a control surface.
octoplane - Assembly 1 Drawing 1.png
Also going to clean up angle excess.
 

pictsidhe

Well-Known Member
Joined
Jul 15, 2014
Messages
8,533
Location
North Carolina
Going to need heavy spars or really fat airfoils. You'll still have lots of interference drag.

What benefits do 4 wings have?
 

Jay Kempf

Curmudgeon in Training (CIT)
Lifetime Supporter
Joined
Apr 13, 2009
Messages
4,072
Location
Warren, VT USA
Why stop at 8 wings? Why a conventional tail. The smaller and higher aspect ratio the wing the easier it is to make.

Engines have been discussed to death. All about wing loading. Build light and 20hp could work, and up from there.
 

lelievre12

Active Member
HBA Supporter
Joined
Jul 15, 2020
Messages
38
You can leave off the elevator. Decalage can be achieved with the wings.
 

delta

Well-Known Member
Joined
May 26, 2011
Messages
2,243
Location
Brookside Utah
The benefit of multi wings to me is based on the huge quantity of 45" CF golf club shafts I wound up with a long time ago. One jig and a bunch of time later... you have a number of small airplanes flying in formation that you can ride around with.MP12B1.JPGMP12B2.JPGMP12B3.JPGmptd1.JPGmptd2.JPGmptd3.JPGmptd4.JPGmptd5.JPG
 

WonderousMountain

Well-Known Member
Joined
Apr 10, 2010
Messages
2,096
Location
Clatsop, Or
I'll just stick to the update and explaination.

The rather square fuselage closes out from
Top & Bottom into a wedge, sides straight.
Twin tails of about the same cord as wings,
form a box with the TRIM wing. Pitch control
stays with the BiPandum wings, along W/roll.
IMG_20200921_142628.jpg
Each of the Wing flaps are full span.
 
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