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« on: July 19, 2011, 10:33:52 AM »
naatumach
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Vaibhav Sharma

Using an identical fuselage as Model 1&2,3.
I have decided to see how dihedral functions.

Test aircraft will have rudders, and elevons.

In order to do this -
1. I am using the wing from model 1&2.
2. Cut the wing in half
3. Attach a Depron rectangle in between to mount the servos.
4. Connect the servos to a Y-Connector, and put it in the 6th Channel, so that i can vary the angle using a regulator.

What i hope to achieve -
Gain height, level the wings and use the regulator to vary the angle of dihedrals and attain roll stability and fly using the rudder and elevator.

Pic 1 - Cutting line
Pic 2 - The hinges are the blue shaped diamonds.

I shall call this Model-4VD... VD stands for variable dihedral.
Picture1.jpg
Model-4VD : Dihedral Testing/verifying aircraft
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« Reply #1 on: July 19, 2011, 10:51:31 AM »
Swapnil
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Retreat, Hell!
Nice idea. Are you going to be varying the dihedral angle in flight or vary it on ground for multiple flights and check for the best one?
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« Reply #2 on: July 19, 2011, 11:38:56 AM »
naatumach
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Vaibhav Sharma
Ill vary it in flight and remember the regulator's position for ground analysis
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« Reply #3 on: July 19, 2011, 11:47:29 AM »
sushil_anand
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Even on a small plane the servos will be subjected to a load much higher than normal. Do take this into account.
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« Reply #4 on: July 19, 2011, 12:01:20 PM »
naatumach
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Vaibhav Sharma
@sushil_anand :
Yes sir, i have. That is why i will be using metal gear servos.
Not only the servo, the hinges will also be under a lot of stress. I believe i have  solution for that.
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« Reply #5 on: July 19, 2011, 02:03:29 PM »
sushil_anand
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Metal gears + high torque.

Would be interesting to see the results. All the best!
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« Reply #6 on: July 19, 2011, 02:29:40 PM »
naatumach
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Vaibhav Sharma
thank you sir. i am always grateful for some luck... I generally need lots of it
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« Reply #7 on: July 19, 2011, 03:40:57 PM »
SunLikeStar
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High spirits we have: gravity we flout.
How are you planing to make the hinge?
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« Reply #8 on: July 19, 2011, 04:55:59 PM »
naatumach
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Vaibhav Sharma
I used proper hinges.
The hardest part i anticipated was the part to synchronize the two wings to rise equally, and it was.
Posted are the pics of the hinges, low and highest angles.
DSC04428.jpg
Re: Model-4VD : Dihedral Testing/verifying aircraft
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« Reply #9 on: July 19, 2011, 07:21:24 PM »
naatumach
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Vaibhav Sharma
Project shelved due to
1. Non availability of line-replaceable units (battery, ESC)
2. Turbulent weather
3. Lack of time for R&D

I have only 9more days left at home

The a/c is good to go, except the esc which needs to be changed.

The esc is in YF-22 which is already plagued by
1. Turbulent weather
2. Lack of time for R&D

I think i will build another pizza box and just fly for the remaining days i have left at home. Also i haven't slept longer than 4hours continuously in the last 4days, which has reduced my patience just a little bit.
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No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.
 

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« Reply #10 on: July 19, 2011, 07:46:14 PM »
Swapnil
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Retreat, Hell!
Ah, that reminds me of the 'sp4mm3r' days. Used to sleep for 2 -3 hours everyday!
Sad that this one had to be shelved. I was really looking forward to the results.
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« Reply #11 on: July 19, 2011, 07:50:36 PM »
naatumach
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Vaibhav Sharma
Quote from: Swapnil on July 19, 2011, 07:46:14 PM
Ah, that reminds me of the 'sp4mm3r' days. Used to sleep for 2 -3 hours everyday!
Been there done that... Smiley fond memories
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Motto: build, fly, and modify.
Prefers working on designs than electronics.
No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.
 

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