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« on: March 10, 2021, 10:09:06 PM »
anuragmaurya15
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This is my first RC build. When i launch the plane, it seems to take a hard left with its nose down eventually hitting ground.

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« Reply #1 on: March 10, 2021, 10:12:17 PM »
anuragmaurya15
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The wings are not dihedral in this pic but i used bamboo skewers to make the wings dihedral. https://uploads.tapatalk-cdn.com/20210310/f4d4260fc8c1bb8da65275f5933339e7.jpg
Why is my plane not flying.. Pls help??


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« Reply #2 on: March 10, 2021, 10:48:36 PM »
K K Iyer
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@anuragmaurya15,

My sympathies.

But I’m reminded of a question I often ask newcomers.
“If you wanted to learn how to ride a bicycle, would you start by building your own design bicycle?”

Learning to fly RC, and building an own successful design are two entirely different things.
Don’t mix them up.

To learn to fly, there are dozens of proven models available.
To learn to build, there are hundreds of designs available.

Please take a look at
1. Flitetest.com
2. Outerzone.co.uk

Even these two threads may help
http://www.rcindia.org/kites-trains-free-flight-and-all-others/2nd-chuck-lunchbox/
http://www.rcindia.org/free-donations-and-sweepstakes/next-contest-20second-flight/

Best wishes

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« Reply #3 on: March 31, 2021, 11:55:43 PM »
SuryaKK
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Student. Mechanical engineering. RC hobbyist.
Greetings, Anurag Maurya.
From the given data I guess I can safely conclude that your propeller is spinning in the clockwise direction when viewed from the cockpit. This direction of rotation generates a gyroscopic effect which causes the nose to dip while taking a left turn (which your plane is doing automatically upon its tossing into the air). To counter this I would recommend that you provide your propeller a bit of right trust and also up thrust. Provided that your plane meets other aerodynamic factors to attain flight, this fix should do the job. Cheesy
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« Reply #4 on: April 01, 2021, 09:36:33 PM »
Sunilk
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Basic design rules
* Thumb rull for plane design[1] (1).pdf (16.14 KB - downloaded 11 times.)
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« Reply #5 on: April 01, 2021, 09:46:56 PM »
Sunilk
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For simplicity   Smiley
IMG_20210401_213924.jpg
Re: Why is my plane not flying.. Pls help??
* IMG_20210401_213924.jpg (42.23 KB, 622x800 - viewed 108 times.)
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« Reply #6 on: April 02, 2021, 09:45:16 AM »
sanjayrai55
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Don't wake a Tiger until you've factored the teeth
Quote from: SuryaKK on March 31, 2021, 11:55:43 PM
Greetings, Anurag Maurya.
From the given data I guess I can safely conclude that your propeller is spinning in the clockwise direction when viewed from the cockpit. This direction of rotation generates a gyroscopic effect which causes the nose to dip while taking a left turn (which your plane is doing automatically upon its tossing into the air). To counter this I would recommend that you provide your propeller a bit of right trust and also up thrust. Provided that your plane meets other aerodynamic factors to attain flight, this fix should do the job. Cheesy

It should rotate clockwise when viewed from the cockpit.
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« Reply #7 on: April 02, 2021, 01:17:46 PM »
K K Iyer
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The prop used is for anti clockwise rotation when viewed from cockpit.
Pl see pic in reply #1.
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« Reply #8 on: April 02, 2021, 01:20:07 PM »
sanjayrai55
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Don't wake a Tiger until you've factored the teeth
Quote from: K K Iyer on April 02, 2021, 01:17:46 PM
The prop used is for anti clockwise rotation when viewed from cockpit.
Pl see pic in reply #1.
Why ever?

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« Reply #9 on: April 02, 2021, 07:46:04 PM »
K K Iyer
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Quote from: sanjayrai55 on April 02, 2021, 01:20:07 PM
Quote from: K K Iyer on April 02, 2021, 01:17:46 PM
The prop used is for anti clockwise rotation when viewed from cockpit.
Pl see pic in reply #1.
Why ever?

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No idea why. Perhaps he only had a left handed prop.
It’s clear from the pic that the prop is left handed (in glow prop terms)

(There are, of course, a lot of other, quite basic, issues, contributing to the model not flying...)
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« Reply #10 on: April 02, 2021, 07:49:59 PM »
sanjayrai55
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Don't wake a Tiger until you've factored the teeth
I think the OP really needs to follow the excellent advice in Reply #3

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« Reply #11 on: April 02, 2021, 09:00:52 PM »
K K Iyer
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Sirji,
This was reply #3, with its wrong conclusion about the prop rotation direction!
Regards

Quote from: SuryaKK on March 31, 2021, 11:55:43 PM
Greetings, Anurag Maurya.
From the given data I guess I can safely conclude that your propeller is spinning in the clockwise direction when viewed from the cockpit. This direction of rotation generates a gyroscopic effect which causes the nose to dip while taking a left turn (which your plane is doing automatically upon its tossing into the air). To counter this I would recommend that you provide your propeller a bit of right trust and also up thrust. Provided that your plane meets other aerodynamic factors to attain flight, this fix should do the job. Cheesy
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« Reply #12 on: April 03, 2021, 04:29:52 AM »
sanjayrai55
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Don't wake a Tiger until you've factored the teeth
I meant the post written by you, Iyer sir!

Funnily, on my Computer, it's Reply #2, but on my phone it's Reply #3!

 Head Scratching
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