So the parameters were:

1. Low wing loading (not over 6oz/sqft) for slow flying speed,
2. About 60w/lb power loading for safe takeoff and climb out,
3. Not over 24" wing span,
4. Elliptical wing instead of the same old rectangle.

So it had to be depron.

Target weight was about 7oz/200gms,
So wing area of a little over 1sqft.

How to pack 1 sqft area into less than 24" span?
A 24x6 wing would have a too low aspect ratio of only 4.

Solution: Biplane.

A 20x5 plank, 100 sqin, and a 16x4 plank 64 sqin, total 164 sqin.
Or about 128 sqin for ellipses.

For drawing the shape of a wing with leading edge half ellipse of 10" semi span and 2" semi chord, trailing edge half ellipse of 10" semi span and 3" semi chord, there is a proper method.

But it's far easier to approximate it by eye and freehand curves!

And the stab was cut similarly from a 12x3 plank, keeping aspect ratio the same as for both the wings for symmetry (and a horizontal tail volume coefficient of 0.50)

So here's what I cut and assembled in 5mm depron.

I wanted it to fly like the Bipe I built 12 years ago, but be better looking...



Here's the link to that old 2014 thread:
https://www.rcindia.org/beginners-zone/indore-bipe-a-model-for-newcomers/

Hi everyone,

Since I don't have access to a field large enough for even a 0.10 size glow powered plane, I thought of designing a small lightweight 'backyard' flier.

So out came a sheet of 5mm depron, a ruler and pencil and a #11 surgical blade.

But before putting pencil to depron, had do do some planning.

I had this small (2cm dia) 15gm motor.
Took a bit of research to find out that it was a Flightline D2704 2320kv rated for about 35watts on 2s.

I tested it with a 5x3x3 prop and got 130gms thust at 30w on 2s.

That was the first step.

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 Hi to all
It's been months/years since i last really sat down to this. Honestly? i was nervous to start again because i didn't want to be bad at it. But today i am choosing progress over perfection. Feels good to be back.

I would appreciate your assistance in compiling a list of essential components. As I have been out of the market for some time, I am unfamiliar with recent advancements. Therefore, I kindly request your guidance in selecting fundamental items such as a radio, batteries, receivers, motors, and ESCs, along with a suitable beginner-level project to initiate.