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Topic: Scratch built biofoam Su-47, 20” wingspan

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« on: September 18, 2010, 09:45:43 PM »

ashJR7202

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Scratch built biofoam Su-47, 20” wingspan

Hi guys,

After successfully flown my 16” Eurofighter and really happy with its performance, I decided to built 20” wingspan sweep forward Pusher prop SU-47. Its Biofoam body is almost finished, with just electric setup including servos to be installed. Its current weight is 70 gms only, expected weight would be around 150 gms.

Will be using HK 1806 2500Kv motor with 10A ESC and 5x3 prop, 450mAh 3s Lipo, and 2x4.3 gms servos.
It is completely made up of 5 mm Biofoam, I used 5mm Red laminated sheet for rudders bought from rcforall.

I referred plans from RCGroup: http://www.rcgroups.com/forums/showthread.php?t=1139977

After seeing some videos on this link I just fall in love with this plane!!!

Pls provide ur comments and valuable suggestion for my project.

Ashish

Scratch built biofoam Su-47, 20” wingspan P1000228.jpg (45.84 KB, 519x692 - viewed 1833 times.) This post has 3 more images(s)/attachment(s). Please login or register to view them.
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« Reply #1 on: September 18, 2010, 09:47:40 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

Some more

Re: Scratch built biofoam Su-47, 20” wingspan P1000232.jpg (34.46 KB, 692x519 - viewed 1850 times.) This post has 2 more images(s)/attachment(s). Please login or register to view them.
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« Reply #2 on: September 18, 2010, 10:01:01 PM »

controlflyer

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Re: Scratch built biofoam Su-47, 20” wingspan

That is one beautiful jet there.. Clap

looks good, cuts are very neat Clap

what paint scheme are you planning on her ?

-Dorwin


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« Reply #3 on: September 18, 2010, 10:17:18 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

Quote from: controlflyer on September 18, 2010, 10:01:01 PM

That is one beautiful jet there.. Clap

looks good, cuts are very neat Clap

what paint scheme are you planning on her ?

-Dorwin

thanks Dorwin!!!

paint scheme, not yet decided!!!


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« Reply #4 on: September 18, 2010, 10:21:11 PM »

controlflyer

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Re: Scratch built biofoam Su-47, 20” wingspan

haha...modified this the 3rd time
Ash.... SU-47 Roll Eyes

Desert Camo or dark gray with white nose...ooh la la Grin

Re: Scratch built biofoam Su-47, 20” wingspan radadada1.jpg (34.35 KB, 800x500 - viewed 1774 times.)
« Last Edit: September 18, 2010, 10:25:43 PM by controlflyer »	Logged

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« Reply #5 on: September 18, 2010, 10:31:09 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

I think u are a die-hard fan of camo Wink


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« Reply #6 on: September 18, 2010, 10:50:08 PM »

buzz_rc

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Re: Scratch built biofoam Su-47, 20” wingspan

Hi Ashish, love the plane..... let me know when you are planning to fly it...would love to see it fly. btw had a good time flying with you guys at the field today..


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« Reply #7 on: September 18, 2010, 11:02:19 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

Wooooooooooooo Beautiful Berkut. Well done!!! Thumbs Up

Ashish, you are leaving us all far behind, how are you achieving those ultra neat cuts? What is the secret? Surgical blades?

Dorwin +1 on the paint scheme. It's awesome!


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« Reply #8 on: September 18, 2010, 11:36:56 PM »

izmile

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Re: Scratch built biofoam Su-47, 20” wingspan

Neat build!

On the paint scheme don't you think dark colours or even camo gets silhouetted against the bright day light? However, I do agree having a funny color for a warbird is just awkward.


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« Reply #9 on: September 18, 2010, 11:45:56 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

I feel as long as the underside is painted a neutral colour like gull grey or ghost grey and the top surfaces are in a distinct camo pattern, the model should be visible from a respectable range. However, I am speaking from the point of scale modelling. Experts please correct me if I am wrong.


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« Reply #10 on: September 18, 2010, 11:50:42 PM »

controlflyer

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Re: Scratch built biofoam Su-47, 20” wingspan

Quote from: vksingh on September 18, 2010, 10:31:09 PM

I think u are a die-hard fan of camo Wink

Yes VK! I am wait till you see my P51-D Mustang Scratch build

Quote from: VC on September 18, 2010, 11:02:19 PM

Dorwin +1 on the paint scheme. It's awesome!

Thank you @VC


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« Reply #11 on: September 19, 2010, 07:28:38 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

HEY GUYS,

thanks for u r support!!!!!

about color scheme, havnt decided yet!!! will 1st maiden it, if successful then will think of coloring it!!!

desert cameo was really beautiful!!! but for that i need to do lots of painting!!! and i dont think will be able to do that!!!so i am thinking of radium cutting only, will have some fixed colors no shading!!!! not yet decided, lets see!!!

Buzz_rc,

i hope it will be complete by this weekend and will be able to maiden it!!! will keep u informed, we will fly it together!!!

ashish


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« Reply #12 on: September 19, 2010, 07:43:26 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

Quote from: VC on September 18, 2010, 11:02:19 PM

Wooooooooooooo Beautiful Berkut. Well done!!! Thumbs Up

Ashish, you are leaving us all far behind, how are you achieving those ultra neat cuts? What is the secret? Surgical blades?

Dorwin +1 on the paint scheme. It's awesome!

hi VC,

thanks for comments!!! but my neat cuts cant be compared with ur experience & expertise!!!

there is no secret in my cuts, i am using regular cutter for this. u can see a black cutter in last pic.
its blade cost around Rs 5-6. while cutting biofoam with this cutter i keep very low angle and instead of cutting in one go i ran blade 3-4 time for neat cut!!! and of course i do have small knife sharping tool, if i feel like blade is loosing it sharpness then i just use this tool and make it sharp.

its small plastic toll which have 4 circular carbon disks and u have to slide ur blade in it!!!

Ashish


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« Reply #13 on: September 30, 2010, 03:28:56 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

Re: Scratch built biofoam Su-47, 20” wingspan P1000242.jpg (57.59 KB, 518x581 - viewed 1643 times.) This post has 3 more images(s)/attachment(s). Please login or register to view them.
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« Reply #14 on: September 30, 2010, 03:30:56 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

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« Reply #15 on: September 30, 2010, 04:55:28 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

hi guys,

i completed this beautiful plane and flown last sunday, took video but is with my frnd, hope will be able to upload it by this weekend!!!

i am planning to color this one, created few color schemes in CorelDraw, but little confussed so need ur help in finalizing. pls see the attached picture, and let me know which one u like.

No 5 is for underneath. so options are from 1-4

thanks for ur help!!!!

Re: Scratch built biofoam Su-47, 20” wingspan SU-47 ClrScheme.jpg (32.19 KB, 474x564 - viewed 1525 times.)
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« Reply #16 on: September 30, 2010, 05:08:20 PM »

saurabhhsrivastavaa

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Re: Scratch built biofoam Su-47, 20” wingspan

go for no.4 the one you admitted you stole from one of my designs Wink


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« Reply #17 on: October 03, 2010, 10:02:37 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

My final color scheme!!

Re: Scratch built biofoam Su-47, 20” wingspan P1000345.jpg (53.4 KB, 514x572 - viewed 1439 times.)
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« Reply #18 on: October 03, 2010, 10:35:09 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

great... when are you posting the video ?? Head Scratching


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« Reply #19 on: October 03, 2010, 10:52:44 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

just now got some time!!!! uploading to youtube!!! hope by morning it will be uploaded!!!!


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« Reply #20 on: October 03, 2010, 10:59:10 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

good luck to U Clap

liked the color scheme Thumbs Up


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« Reply #21 on: October 04, 2010, 12:09:48 AM »

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Re: Scratch built biofoam Su-47, 20” wingspan

Beautiful! You are an inspiration for people like me.


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« Reply #22 on: October 04, 2010, 09:06:37 AM »

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Re: Scratch built biofoam Su-47, 20” wingspan

Finally done!!!! uploaded all 3 videos!!!!!

RC BioFoam SU-47 Controls:

RC BioFoam SU-47: at time 2.15 & 3.15 you will see this plane starts wobbling/oscillating at fast rate. it is called 'wing Rock' effect. it happens at high alpha (angle of attack) & at slow speed. if i increase speed or change direction it is suppressed!!!!
tried to find solution but i liked that effect!!!! Grin

RC Biofoam SU-47 Landing:


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« Reply #23 on: October 04, 2010, 12:08:16 PM »

ashJR7202

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Re: Scratch built biofoam Su-47, 20” wingspan

Quote from: VC on October 04, 2010, 12:09:48 AM

Beautiful! You are an inspiration for people like me.

thanks VC, Nehutech!!!

i hav just started & ur much experience!!! after seeing u work, ur becoming inspiration for me!!!!


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« Reply #24 on: October 04, 2010, 12:14:10 PM »

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Re: Scratch built biofoam Su-47, 20” wingspan

Beautiful Ashish, U guys were flying at the old field next to patni computers ??


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