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Old Sep 27, 2012, 05:41 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
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Sweet project! Ignore the haters; they're just jealous. None of them want to try taking on a project this big, so they belittle the efforts of those who do.

What construction method are you planning for the wing?
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Old Sep 27, 2012, 06:43 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Quote:
Originally Posted by C₄H₁₀ View Post
Sweet project! Ignore the haters; they're just jealous. None of them want to try taking on a project this big, so they belittle the efforts of those who do.

What construction method are you planning for the wing?
Thanks C4h10 Nice to see someone not being negative welcome aboard..

The wing construction technique will consist of a hotwired Blu-foam core and balsa sheeting epoxied onto the foam core and then fitted with balsa leading edges and Then A nice Juicy carbon spar to hold it together

K
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Last edited by Keenan smith; Sep 27, 2012 at 06:45 AM. Reason: Correcting capitalizations..
Old Sep 27, 2012, 06:57 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
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Interesting. Gonna take a lot of balsa and epoxy to do that whole wing. How much are you estimating the wing to weigh once it's complete (with servos/finish/hardware), and what thickness/area/density of individual balsa sheets will you be using?
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Old Sep 27, 2012, 07:13 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Quote:
Originally Posted by C₄H₁₀ View Post
Interesting. Gonna take a lot of balsa and epoxy to do that whole wing. How much are you estimating the wing to weigh once it's complete (with servos/finish/hardware), and what thickness/area/density of individual balsa sheets will you be using?
About 800g-900 per wing or so ill probably use 3/32 contest grade balsa sheets

K
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Last edited by Keenan smith; Sep 27, 2012 at 07:14 AM. Reason: Capitalizations .. again
Old Sep 27, 2012, 07:18 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Quote:
Originally Posted by G-Forced View Post
Go back to watching playschool little man ! We build and fly here !
Wow your such a big man! only Bullies pick on people younger than themselves... and usually its because they have they own insecurities to deal with
Now can we P..Lease remain on topic ...

K
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Last edited by Keenan smith; Sep 27, 2012 at 07:23 AM.
Old Sep 27, 2012, 07:25 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
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800-900g? Are you only sheeting one side of the wing? Doing both sides, your balsa sheeting alone will weigh around 1.2-1.5lbs.
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Old Sep 27, 2012, 07:28 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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i mean 800-900g dry I'e without servos and finishing im expecting about 1100g finished per wing
and yes im sheeting both sides..
K

Sorry for the confusion..
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Last edited by Keenan smith; Sep 27, 2012 at 07:29 AM. Reason: Caps
Old Sep 27, 2012, 07:32 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
12,425 Posts
Cool. What airfoil section are you using? This is neat...

I sort of ask a lot of questions
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Old Sep 27, 2012, 07:32 AM
Its all fun
Tonystott's Avatar
Australia, NSW, Forster
Joined Oct 2004
7,177 Posts
Quote:
Originally Posted by C₄H₁₀ View Post
800-900g? Are you only sheeting one side of the wing? Doing both sides, your balsa sheeting alone will weigh around 1.2-1.5lbs.
And the cracks in your belief start....
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Old Sep 27, 2012, 07:35 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Quote:
Originally Posted by C₄H₁₀ View Post
Cool. What airfoil section are you using? This is neat...

I sort of ask a lot of questions
Questions are fine...! ( i ask alotof questions myself but that how you learn
Im going to be using an SG6041 Airfoil

See below (its a glider airfoil)

K
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Old Sep 27, 2012, 07:38 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Originally Posted by Tonystott View Post
And the cracks in your belief start....
Well Sorry But i used to Work in Pounds and Ounce and Have been Forcing myself to use the metric system as its Simpler.. (so that may explain the Slight underestimate aswell as a small mis-understanding

now as said earlier please stay on topic

K
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Old Sep 27, 2012, 08:00 AM
Wake up, feel pulse, be happy!
C₄H₁₀'s Avatar
United States, AK, Fairbanks
Joined Aug 2009
12,425 Posts
Yeah, nothing wrong with simple errors, eh? Everyone's done it.

How did you calculate the weight of the finished wing panels?
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Old Sep 27, 2012, 08:11 AM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
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Quote:
Originally Posted by C₄H₁₀ View Post
Yeah, nothing wrong with simple errors, eh? Everyone's done it.

How did you calculate the weight of the finished wing panels?
it was just guesstimate For the Time Being..
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Old Sep 27, 2012, 11:03 AM
Registered User
United States, OR, Portland
Joined Apr 2011
385 Posts
Quote:
Originally Posted by 3DDFHobbies View Post
Well Sorry But i used to Work in Pounds and Ounce and Have been Forcing myself to use the metric system as its Simpler.. (so that may explain the Slight underestimate aswell as a small mis-understanding

now as said earlier please stay on topic

K
Haha! You're supposidly from Great Britain but you're used to using pounds/ounces... You're an American! Although I still think the funniest give-away is the 17 foot wingspan, lol.
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Old Sep 27, 2012, 11:14 AM
York Electronics
Gary Warner's Avatar
Dallas Tx USA
Joined Apr 1999
2,505 Posts
Quote:
Originally Posted by 3DDFHobbies View Post
it was just guesstimate For the Time Being..
When I gave my examples of a balsa sheeted foam wing, I was using white 1 pound expanded polystyrene foam, not 2 pound extruded foam. You might reconsider the guessed weight to be closer to 20-25 square inches per ounce at this scale... maybe even less (I haven't put the numbers to a calculator yet). The foam has a way of adding a lot of weight as scale increases, due to higher ratio of extra internal cubic fill-space as square inches increase. You might be better off using a hollowed out core instead of a solid core.
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