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Author Topic: DE Wing Dihedal  (Read 8809 times)

Offline DErwin

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DE Wing Dihedal
« on: May 10, 2018, 01:20:23 AM »
Hi and good day to all.
Finally back in building my DE.  I will be fitting the wings to the fuse and attaching the front and rear spars to the wings.
I can not seem to find in the plans the required dihedral for the wings.  Can someone please help me out.
Thanks and I hope some one can help me on this soon.

Happy building

Offline MrG

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Re: DE Wing Dihedal
« Reply #1 on: May 10, 2018, 02:20:42 AM »
3in i set mine i think, i dont think its in the drawings 
if you dont get an answer ill measure up tomorrow
MrG
Temora Airport  Australia
1st Aussie DE built/flown
19-8866
-----------------------------
1 Oct 2015 First Flight
Feb 2019 - 155 hrs Flown
March 4th removed from service for Cabin Mods

Offline DErwin

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Re: DE Wing Dihedal
« Reply #2 on: May 10, 2018, 03:42:50 AM »
Hi MrG,

Thanks for the reply.  I just want to clarify,
You mean to tilt up the wing tip by 3-inches from level?

Thanks again

Offline MrG

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Re: DE Wing Dihedal
« Reply #3 on: May 10, 2018, 01:37:01 PM »
Yes Ill get back to you on measurement in about 3 hrs
MrG
Temora Airport  Australia
1st Aussie DE built/flown
19-8866
-----------------------------
1 Oct 2015 First Flight
Feb 2019 - 155 hrs Flown
March 4th removed from service for Cabin Mods

Offline DErwin

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Re: DE Wing Dihedal
« Reply #4 on: May 10, 2018, 09:47:50 PM »
Hi MrG,

Were you able to get the measurements.  Sorry to rush up on you.

Offline MrG

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Re: DE Wing Dihedal
« Reply #5 on: May 11, 2018, 04:48:14 AM »
No Friday was a bad day 
in morning is sat ill do then i dont have to go any were its only in next doors hanger
MrG
Temora Airport  Australia
1st Aussie DE built/flown
19-8866
-----------------------------
1 Oct 2015 First Flight
Feb 2019 - 155 hrs Flown
March 4th removed from service for Cabin Mods

Offline Kiwi55

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Re: DE Wing Dihedal
« Reply #6 on: May 11, 2018, 07:12:35 AM »
3" higher than level at the wing tips is the measure for the cabin eagle. I presume the DE would be the same.
...Paul

Offline DErwin

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Re: DE Wing Dihedal
« Reply #7 on: May 11, 2018, 02:41:14 PM »
Paul,
Thank you so much for the confirmation on the 3'' dihedral.

Offline MrG

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Re: DE Wing Dihedal
« Reply #8 on: May 11, 2018, 02:47:22 PM »
Yes correct
MrG
Temora Airport  Australia
1st Aussie DE built/flown
19-8866
-----------------------------
1 Oct 2015 First Flight
Feb 2019 - 155 hrs Flown
March 4th removed from service for Cabin Mods

Offline DErwin

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Re: DE Wing Dihedal
« Reply #9 on: May 11, 2018, 10:37:02 PM »
So it is definitely three(3) inches up on the wing tip from level for the dihedral .
Thank you so much for the response and clarification.
Thanks MrG and Paul.  Will send a picture of the set-up later.

Cheers and blue skies to all.

Offline MrG

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Re: DE Wing Dihedal
« Reply #10 on: May 12, 2018, 02:49:43 PM »
to be honest after all the mods ive done to mine and flying 120 hrs on it, i would doubt even if you were a inch out up or down you would 
not notice the difference - the main thing is the wash out in the wing makes a big dif. how it stalls
MrG
Temora Airport  Australia
1st Aussie DE built/flown
19-8866
-----------------------------
1 Oct 2015 First Flight
Feb 2019 - 155 hrs Flown
March 4th removed from service for Cabin Mods

Offline DErwin

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Re: DE Wing Dihedal
« Reply #11 on: May 13, 2018, 03:22:48 AM »
Yes I agree with you MrG.
I am planing to set the wash-out as suggested on the video by Leonard.  The wing root is set at a positive angle
2-Degrees incidence as per plan on the DE.  The wing tip is set level with the horizontal of the fuselage. 

Offline azevedoflyer

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Re: DE Wing Dihedal
« Reply #12 on: April 26, 2020, 05:49:13 PM »
To all:
On a DE, is wing dihedral really necessary?
Do you guys think it (dihedral) makes a measurable difference in handling?
Cheers,
Azevedoflyer
azevedoflyer

Offline Tom H

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Re: DE Wing Dihedal
« Reply #13 on: April 27, 2020, 06:20:04 AM »
Aze, I have had the same thought.  Our DE Stubby has the dihedral as per plans.  I suspect that no dihedral would not make a significant difference in handling, but it might result in a bit more speed.  These aircraft are relatively light, and even light breezes can lift a wing, requiring the pilot to actively fly the plane, and I don't feel that the dihedral provides much stability.

Only my thoughts based on our DE, mind you.
Tom H
Stubby, a BDE
Treehugger, LEU

Offline txaggie88

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Re: DE Wing Dihedal
« Reply #14 on: April 28, 2020, 07:13:57 AM »
Wing dihedral is one of the primary factors affecting roll stability. 

 

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