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« on: June 29, 2015, 11:55:55 AM »
vishalrao
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I have been wanting to build a light weight, slow flying, simple to build and very stable plane that beginners would love to fly.

Here are the specifications:

Wingspan: 760mm
Fuse length: 550mm
Chord: 150mm

Please forgive me as the size of the model has nothing to do with the name of the model  Giggle However, it's going to look like one.

It would be a low cg design. Benefits would be:

1. Very very stable.
2. Doesn't require landing gear (Beginner's nightmare.)

Disadvantage would be flying in windy conditions. Due to it's fuse design, it will be very sluggish to turn in windy conditions. Only maiden will tell the complete picture  Grin

Attaching photos of build...
IMG_9587.jpg
RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #1 on: June 29, 2015, 11:58:55 AM »
vishalrao
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Fuse material is 3mm biofoam laminated with clear tape.

Attached formers (7mm biofoam, width 20mm).
IMG_9590.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
* IMG_9590.jpg (48 KB, 800x533 - viewed 600 times.)
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« Reply #2 on: June 29, 2015, 12:02:56 PM »
vishalrao
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The other side of the fuse cut. This is not cut according to the dimension. Slightly excess is left.

Have used hot glue to glue the formers. However, will use Fevibond (rubber based adhesive) to glue the other side of the fuse as the area to be glued is large and hot glue will set soon.

As fevibond will eat foam, have taped the bare foam surface first and then have applied fevibond.

The other side is then glued and excess cut carefully.
IMG_9591.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #3 on: June 29, 2015, 12:04:18 PM »
vishalrao
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Fuse ready...

About 40gms
IMG_9593.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #4 on: June 29, 2015, 12:05:23 PM »
sanjayrai55
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Looking good, Vishal  Thumbs Up
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« Reply #5 on: June 29, 2015, 12:06:55 PM »
vishalrao
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Thank you Sanjay sir!
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« Reply #6 on: June 29, 2015, 01:03:08 PM »
girishsarwal
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Coming up very well Vishal.
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« Reply #7 on: June 29, 2015, 02:32:03 PM »
rajsigma
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Good going Vishal  Clap
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« Reply #8 on: June 29, 2015, 03:39:26 PM »
vishalrao
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Thank you Girish and Rajesh Smiley
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« Reply #9 on: June 29, 2015, 04:30:30 PM »
rcrcnitesh
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Re:
Very good sir.
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« Reply #10 on: June 29, 2015, 07:15:59 PM »
vishalrao
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@rcrcnitesh Thank you Smiley
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« Reply #11 on: June 29, 2015, 07:17:18 PM »
vishalrao
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Attached horizontal and vertical stabilizers...
IMG_9596.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #12 on: June 29, 2015, 07:19:09 PM »
vishalrao
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Power plant and electronics:

Motor - Motrofly 2204 KV1600
ESC - ZTW Mantis 12A
Servos - EMAX 4.3g
Battery - Haiyin 7.4V 500mAh 20C
IMG_9599.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #13 on: June 29, 2015, 07:20:27 PM »
vishalrao
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1. Cut door for accessing electronics
2. Fixed motor
3. Fixed servos
IMG_9600.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #14 on: June 29, 2015, 07:21:21 PM »
vishalrao
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Wing getting ready...

Maiden on Wednesday  Grin
IMG_9603.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #15 on: June 29, 2015, 08:12:10 PM »
K K Iyer
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@vishalrao,
This model is begging you for floats Grin
You can make it work as you demonstrated some months back. Just right for the monsoon...

That will give you a second Sweepstakes entry without building another model Wink
Regards.
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« Reply #16 on: June 30, 2015, 10:21:34 AM »
Nithinraj Kotian
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Nice Build Vishal sir  Hats Off Hats Off
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« Reply #17 on: June 30, 2015, 06:42:39 PM »
vishalrao
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@K K Iyer Thanks for the inspiration sir! Will think about it. Sounds fun.

@Nithinraj Kotian Thank you Nithin Smiley
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« Reply #18 on: June 30, 2015, 06:43:37 PM »
vishalrao
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Wing ready...
IMG_9605.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #19 on: June 30, 2015, 06:47:24 PM »
vishalrao
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Electronics access door, wing holders fixed...

Push rods made...
IMG_9609.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #20 on: June 30, 2015, 06:48:51 PM »
vishalrao
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Model ready for maiden tomorrow  Grin

AUW: 196gms
IMG_9612.jpg
Re: RCI 6th Sweepstakes : The Whale - Light Weight, Slow Flying Foamie
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« Reply #21 on: June 30, 2015, 07:26:53 PM »
sanjayrai55
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196!!Wow

Vishal, I think you make them from papad  Giggle Giggle Giggle
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« Reply #22 on: June 30, 2015, 07:29:38 PM »
K K Iyer
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@vishalrao,
In the test flight be prepared for inadequate directional stability, poor rudder response and dutch rolling (maybe severe)

This will be caused by too much side area ahead of the CG.
(This is what i faced with a deep bodied old timer type. Compounded by low power and tail heaviness Grin)

Best of luck.
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« Reply #23 on: June 30, 2015, 07:31:01 PM »
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Quote from: sanjayrai55 on June 30, 2015, 07:26:53 PM
196!!Wow
Vishal, I think you make them from papad  Giggle Giggle Giggle

Suggest frying/roasting before use, to increase rigidity  Grin
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« Reply #24 on: July 01, 2015, 11:27:56 AM »
vishalrao
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Mission accomplished! Here's maiden video...



No bad tendencies. Turns well. Flew for about 7-8 minutes. Drained half the battery. Requires 5gm nose weight.

Here's another of me trying to catch it...
« Last Edit: July 01, 2015, 11:59:09 AM by vishalrao » Logged
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