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« on: July 18, 2010, 12:24:24 AM »
Sethji
Scratch building a RC plane in India
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City: Kolkata
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RC plane hobbyist from Kolkata, but now in DC




I have been working on a scratch-build plan called TUFFY. This model has a Pusher Prop design and a glider like profile, which makes it a great electric plane for beginners like me (especially those who are prone to crashes Smiley ) . So, I thought, I will share some specs, pictures, links to the original designer's plans, etc, etc...

My Tuffy's specs:
Wing Span: 41''
Chord length: 7"
Dihedral: 1.5" (each side or total 3")
Radio Set-up: 3ch (motor, rudder, elevator)
Material: High-density thermocole, fevicol, tape, wooden skeewers, toy-car wheels, etc
Model Weight: 225 gms
Estimated AUW: 550 gms (using brushed motor & NiHm batteries)

The original plans were developed by people at www.rcgroups.com/forums/showthread.php?t=1000670 . I think, someone on our forum has also created a similar (but smaller in size) model. The plan and pictures are attached. Comments and suggestions are welcome.

* Tuffy - Plans.pdf (54.52 KB - downloaded 612 times.)
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« Reply #1 on: July 18, 2010, 12:33:23 AM »
Sethji
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RC plane hobbyist from Kolkata, but now in DC



These are pictures of the model's progress till its' initial glide test.

Airplane pictures 017.jpg
Re: TUFFY - Pusher Prop Model
* Airplane pictures 017.jpg (44.37 KB, 800x600 - viewed 5505 times.)
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« Reply #2 on: July 18, 2010, 12:39:42 AM »
ujjwaana
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Great Sethji! I have been trying to make my own TUFFY using the salvaged wing (under-chambered) from the Chinese plane

I hope the fuse extending from the TE till the tail is heavily reinforced under the foam.
How much angle you put on the motor ? (-)3-(-)3 ??
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« Reply #3 on: July 18, 2010, 01:18:56 AM »
akky
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I am not weird...Instead i am a bit different....



sir how did you give the wing an aerofoil shape...this the only thing in foam scratch building that i have noot been able to understand....someone please help meee...... Help Me Help Me Help Me Help Me Bang Head Bang Head Bang Head Bang Head Bang Head Bang Head
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Arcarious @ Akky.....
I have never crashed while flying....Its the Landing only that gets me....
Happy Landings....&.....Happy Crashings
 

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« Reply #4 on: July 18, 2010, 02:49:50 AM »
ujjwaana
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Akky,
What Sethji has done is used what is called KFM2 aerofoil. Search RCgroups or even this forum and you would know.
I am salvaging a wing from cheap Chinese plane which has under chambered wing formed using injection molding (industrial method). How ever for my Blue Baby , I indeed made an under chambered wing by 'Heat Forming' method (on depron). search net and you would know. That was a heck of clumsy method.
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« Reply #5 on: July 18, 2010, 11:02:19 AM »
chanduvcrc
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very well done Clap Clap Clap

Just one thing to know- From where do you get those thermocol (high density) sheet Huh? Huh?

Are they available in local market?
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« Reply #6 on: July 18, 2010, 12:03:47 PM »
Sethji
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RC plane hobbyist from Kolkata, but now in DC



@ chanduvcrc, I got the thermocol from a shop that sells insulation supplies (AC, refrigration, heating, etc)... For those in Kolkata, these shops are located in Lal-Bazar and Gariahat areas.

@Ujjwaana, I have reinforced the fuse extending from the TE till the tail with a light-weight wooden stick (as I did not have any CF rods)... I is pretty sturdy.
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« Reply #7 on: July 18, 2010, 12:12:44 PM »
rohitgupta322
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Well done Ritesh bhaiya. The model looks awesome. So, why dont u plan to fly this at the maidan, even i can join u with my plane.
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« Reply #8 on: March 30, 2011, 04:27:53 AM »
Sethji
Scratch building a RC plane in India
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RC plane hobbyist from Kolkata, but now in DC



@Rohit, I could not maiden this. I left Kolkata, by the time I finished building this. Nonetheless, my parents have stored it, and I will fly this, when I return next year.

Built and flown a slow-stick recently. But, I have migrated to Ultra Micros (because of the cold weather here). Will post pictures soon.  Smiley
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