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Flying Wing CG calculator (Read 270 times)
Reply #6 - Aug 14th, 2018 at 9:49pm

Sky9pilot   Offline
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Kelso, WA 98626 USA

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Great pic...thanks!  WoW that baby will be able to balance all sizes of models! Smiley
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #5 - Aug 14th, 2018 at 6:03pm

Kittyfritters   Offline
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California

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In case anyone wanted to know what this type of rig looks like in use...
 

23487.jpg (177 KB | 10 )
23487.jpg

Qua sublata omnia praecepta legis
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Reply #4 - Jul 2nd, 2018 at 11:19am

Sky9pilot   Offline
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Kelso, WA 98626 USA

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I'm sure you built a jig for balancing your CL models as well as holding on to the wingtips. 

I use a 2"X4" and some 1/4" dowel cut about 12" long and glued into the 2x4 about 6" apart, or if you plan on building larger model drill several holes to receive the dowels starting at about 3" and going up from there.  I then use the pencil erasure replacements with the pointed tips that slip over pencils and put these on the dowels.  These become the balance points on the wing under surface as measured on the plans back from the L.E. of the wing roots.
 

balance_jig.JPG (48 KB | 12 )
balance_jig.JPG

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #3 - Jul 2nd, 2018 at 8:57am

alfakilo   Offline
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Retired USAF and TWA.
St Louis, MO

Posts: 497
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My question is not how to determine the location of the CG, instead it is how do we actually measure it.

In my CL days, measuring the CG was a simple matter of holding on to the wingtips at the proper place to check balance. But with the P-56, it would seem to be not quite as easy as that given the wing incidence, dihedral, and wingtips. In this plan example, how exactly do we balance this thing!!??
 

1_p56_cg.jpg (36 KB | 10 )
1_p56_cg.jpg
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Reply #2 - Jul 1st, 2018 at 6:28am

staubkorb   Offline
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Stick & Tissue
Germany

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This calculator takes in just about all configurations:
https://www.ecalc.ch/cgcalc.php?deeplink=Arcus%20(Example);cm;17.5;17.5;13.5;10....;

And this works well for canards and is the one I used for my RUTANGO:
https://rcplanes.online/cg_canard.htm

This one for "normalos":
https://rcplanes.online/cg_calc.htm

The last two are already listed here in the board with the link to the updated site.
 

WWWoFF
Wonderful Wacky World of Free Flight
(with a bit of rc thrown in for giggles)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
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Reply #1 - Jun 29th, 2018 at 7:44pm

Craig 3   Offline
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I Love YaBB 2.5 AE!
West Virginia, USA

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Just in time. Thanks for posting!
 
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Jun 29th, 2018 at 12:33pm

Sky9pilot   Offline
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Stick & Tissue
Kelso, WA 98626 USA

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Found this CG calculator for Flying Wings.  Hope you find this helpful:  Flying Wing CG Calc Click Here
Here's another one: Click Here
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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