Lovely build. Congratulations 

Happy flying - waiting for the flying video 

@SohelKhan,

You need two things, adequate thrust and sufficient pitch speed.

1. You'll need two motors of about 1kg thrust each.
This thread will give you some idea:
https://www.rcindia.org/electric-power/motor-setup-not-producing-enough-thrust/

2. For your estimated wing loading, the stall speed will be about 50kmph, 14m/s.
So your approach speed for landing will be 60-70kmph!
And the cruise/top speed will be like 110-130kmph, say 35m/s
That needs about 15,000rpm with a 6" pitch prop

We don't know if a D3536 can reach that rpm with say a 9x6 prop.
I'll try to check mine (1000kv) with 3s and 4s and post the result here.

BTW, to fly such a model will need a lot of experience or a lot of courage, probably both! 

Please book m2222 motors

Quote from: K K Iyer on November 28, 2025, 09:49:52 PM@SohelKhan,

First post in five years?!

I'll respond in imperial units as that's easier for me.
Your wing is about 66" span, 6" chord, 2.75 sqft area, right?
So aspect ratio is 11, much higher than around 6 for a typical RC model of this span.
(I assume it is RC, not control line!)

At such aspect ratio, the bending load on the wing will be significant.
Your carbon spars are probably adequate, but the wing construction seems flimsy.
I would have gone for full 1/16" balsa sheeting, top and bottom.
Anyway, please do a load test of at least 4g.

Why is the estimated weight so high? 3kg?
At this AUW, the wing loading will be about 38oz/sqft.
That's 60% higher than desirable (around 24oz/sqft)

I see no provision for ailerons. Are you planning on using only rudder, elevator and throttle? I fear that without ailerons it would be unflyable.

If you are with me so far, I'll proceed with estimating the power requirement.

Best wishes for your project. Lovely fuselage!

Iyer.

Hi, actually the whole construction is of XPS foam covered in fiberglass. Wings will be having two 8mm CF spars, so the whole plane actually feels strong to me and i have kept the ailerons in my mind but not cut as of now but it will be there before the maiden

Hello Sir,
I wanted to confirm that the build log has been shared via the Google Drive link. I have verified the link and permissions again just now, and the images are viewable by anyone with the link (not hidden or restricted).
Would you mind re-checking the link at your earliest convenience?
https://drive.google.com/drive/folders/1R9RlcqG2hX8zUJRwAsnxzFJDblmfoVw9

@Samadder,

Looks great!

Can you post your build log with photos and notes here?
We haven't seen a build log on this forum for some time, except for Roman's micro.
(Photos in the link are hidden)

Regards
Iyer

My recent build..........

Model Name: SCHOOL MASTER v2
Wing Span: 40"
Weight: 476g
Power: .10-.15 size 2C engine / 200w-300w brushless motor
Build Log Google Drive URL: https://drive.google.com/drive/folders/1R9RlcqG2hX8zUJRwAsnxzFJDblmfoVw9

Only 1 motor ans very light use
Asking price - 1350 + Ship

Very slightly used and like a new condition

Asking price - 750 + Ship

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