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« on: April 14, 2014, 09:59:22 PM »
johnywalker8pm
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Hi all.

This is my 2nd entry for the sweepstakes.

As the name states its a convertible one, that can be used as pusher and tractor both. I have no clues whether any one has tried this before or not.
Here is the basic concept for the plane and an honest attempt to create something new. Feed back and suggestion will be extremely helpful.

1. Its a basic trainer plane with adjustable/re-sizable Fuselage for adjusting the CG while changing from pusher to tractor.
2. Its a simple square tube structure for easy and fast build.
3. 36" Wing span, 6" cord (1" aileron can be added later), 24" fuse (Adjustable up to 30" according to the wing span) Wink
4. Power pod (2840 kv motor + 20amp esc + 1000mah battery) + 2 no tg9 servo.

Started working on this build 2 weeks back. Almost completed, need to configure the power pod and ready, steady n fly on this weekend  Grin

For the date authentication purpose images with newspaper on background attached. The starting date of the project was 6th April 2014.
Newspaper was not there with me that day for that i have attached a picture with the live t20 match on tv as back ground. Grin

Pics are attached



20140414_213353.jpg
Convertible Scratch build for 5th anniversary sweepstakes entry
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« Reply #1 on: April 14, 2014, 10:00:49 PM »
johnywalker8pm
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Foam sheets are brought to the desk for slicing using DIY  hot wire foam cutter.

20140406_205309.jpg
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« Reply #2 on: April 14, 2014, 10:02:08 PM »
johnywalker8pm
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Sliced foam and first fuselage.

20140410_065104.jpg
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« Reply #3 on: April 14, 2014, 10:04:28 PM »
johnywalker8pm
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Horizontal stab with 2 fuselage tube.

20140412_062430.jpg
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« Reply #4 on: April 14, 2014, 10:06:19 PM »
johnywalker8pm
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test fit and laminating with colored tape.

20140412_211229.jpg
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« Reply #5 on: April 14, 2014, 10:08:44 PM »
johnywalker8pm
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Wings - Sliced, attached and adding some weight to the wings. Grin

20140413_095707.jpg
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« Reply #6 on: April 14, 2014, 10:11:49 PM »
johnywalker8pm
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few more photos.

For pusher one more tube will be added on top of the fuse with 1" clearance for 6x4 prop.

20140414_094037.jpg
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« Reply #7 on: April 15, 2014, 11:24:09 AM »
manojswizera
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Good Johny, colors are bright,which will help in orientation.


As the name states its a convertible one, that can be used as pusher and tractor both. I have no clues whether any one has tried this before or not.


I also attempted a convertible plane, and it came out good with smooth flying. below is the link
http://www.rcindia.org/electric-planes/push-ler-my-new-rc-plane/

What a coincidence, i was also having no newspaper that time and used the same TV method for reference, same Sweepstakes period.
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« Reply #8 on: April 15, 2014, 03:31:14 PM »
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Great Johnny,

What did you used for covering, i still am not able to get a decent wrinkle free covering for my plane.
Shifting to coro for the same reason.

Ashok.P
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« Reply #9 on: April 15, 2014, 04:44:12 PM »
johnywalker8pm
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@manoj

Thanks.. nice built by you too..

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« Reply #10 on: April 15, 2014, 04:45:19 PM »
johnywalker8pm
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@ Ashok

its normal colored masking tape, available in book stores..  Grin
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« Reply #11 on: April 15, 2014, 11:26:20 PM »
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@v2 eagle- Sir, I too use tapes for lamination and then adding some vibrant looks to all my HD thermacole models. For lamination I use normal transparent tapes/lamination sheets and for adding colours I use coloured tapes. These come with thickness of 45mm. My suggestion to you is firstly put the tape whichever you decide for colouring purpose, make the markings with a pen and then put tape. After you've done it you just need to iron it. Switch ON your iron for 10-15 seconds. It gets sufficiently hot and then iron everywhere on tape. The tape would stick to the base and even all the wrinkles(if any comes by mistake) are also removed.
Try it. Best of luck.
 Hats Off
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« Reply #12 on: April 18, 2014, 05:25:30 PM »
johnywalker8pm
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Today's update.

stabilizer and magnetic hatch added.

20140418_165240.jpg
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« Reply #13 on: April 18, 2014, 08:57:00 PM »
Shyam Hembram
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hey Johnnywalker which foam are you using??? are these normal thermocol???
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« Reply #14 on: April 18, 2014, 10:08:32 PM »
johnywalker8pm
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No Shyam, They aren't. these are high density foam used as packing some kind of motors. there is a service station near to my place from which i collect those from their garbage bins at early morning  Grin

here are the photos of that foam and sliced with DIY hot wire foam cutter. 

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« Reply #15 on: April 21, 2014, 07:50:26 AM »
johnywalker8pm
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Today's update. Rudder and elevator added.

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« Reply #16 on: April 24, 2014, 05:49:01 PM »
johnywalker8pm
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Today's update. Control horns and servos installed.  Grin

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« Reply #17 on: May 02, 2014, 09:38:01 PM »
johnywalker8pm
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Push rods & motor mounted.

20140502_081609.jpg
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« Reply #18 on: May 02, 2014, 09:41:36 PM »
johnywalker8pm
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some last minute correction.

horizontal stabilizer shape changed and nose extended about 6" for correction of CG.


20140428_115618.jpg
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« Reply #19 on: May 02, 2014, 09:48:39 PM »
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Looks amazing man. mine is almost ready awaiting servos. lets fly it this sunday. What says
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« Reply #20 on: May 02, 2014, 09:54:15 PM »
johnywalker8pm
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Thanks Ashok.

Yah..  definitely we will fly this weekend.

Still little final touch is pending like the nose part has to be aerodynamic.. will give it a pointy shape with a cowling (synthetic foam) which can save the nose form crash.  Grin Grin
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« Reply #21 on: May 03, 2014, 08:33:59 PM »
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Last minute update. didn't liked the previous wing.. created a new one and all set for maiden tomorrow..

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« Reply #22 on: May 03, 2014, 08:36:17 PM »
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 Grin

can be assembled in field ..

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« Reply #23 on: May 03, 2014, 11:52:59 PM »
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Output.. Grin

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« Reply #24 on: May 04, 2014, 10:04:23 AM »
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maiden done today. Plane flew great and most importantly crash resistant and withstand any crash. Close to 5mins on a 2200mah battery in single flight. The ground chosen was coverd with a foot long grass to save the plane. Attached pic is jonny recovering the plane few feet near the puddle.

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