Extra 330L 80"  
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All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> Extra 330L 80"
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Extra 330L 80" - 2/21/2008 6:25:11 PM   
dirtybird


 

Posts: 2825
Joined: 1/25/2002
From: Mesa, AZ, USA
Status: offline 		I recently obtained one of these. I intend to fly it with a Hacker 60M with A123 batteries. The projected weight is 15#.
I just wonder about the wing tube. Its only 1" Dia with 0.025 thickness. Can anyone tell me if this will be strong enough?
TNTlandinggear has one that is 0.042 thickness. Do I need to get one of those?
       Post #: 1

RE: Extra 330L 80" - 2/21/2008 6:35:22 PM   
opjose



Posts: 4995
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		If I recall correctly there are two wing tubes. The larger one and the smaller alignment tube.

Make sure you get a tight fit against the fuse and you should be fine.

A flat fit helps spread the force out along the wing root as well instead of just on the wing tube.



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Build em'', fly em'', crash em'' and build more.

(in reply to dirtybird)
       Post #: 2

RE: Extra 330L 80" - 2/21/2008 7:48:02 PM   
dirtybird


 

Posts: 2825
Joined: 1/25/2002
From: Mesa, AZ, USA
Status: offline 		There is only one tube in my kit. There is another 1" hole in the wing root but no tube in it. I wonder if I am missing something.
The wing is bolted on with two 4mm bolts in the center of the wing. That will help in compression but not much help in tension.
Has anyone flown this airplane?

(in reply to opjose)
       Post #: 3

RE: Extra 330L 80" - 2/21/2008 8:36:39 PM   
opjose



Posts: 4995
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline
quote:

ORIGINAL: dirtybird

There is only one tube in my kit. There is another 1" hole in the wing root but no tube in it. I wonder if I am missing something.
The wing is bolted on with two 4mm bolts in the center of the wing. That will help in compression but not much help in tension.
Has anyone flown this airplane?


If there are two plastic ( or fiberglass ) retainer tubes running through the fuselage, then there should be two wing tubes too.

If the hole is there, you can always opt for installing a second wing tube that may fit... However you'll need to check the wing receptacle itself, to see if the hole is set up so that any stress is distributed along the formers.

If the tube ends up hanging out there by itself, so to speak it will have no effect.

Try to get the wing root flat against the fuse.

BTW: I have a plane who HAD a similiar Extra 330L, the .60 version.

He brought it out to the field, and had me maiden it.

He THOUGHT he had the C.G. right and when we checked it looked ok.

I got the plane up but it was almost impossible to control as it wanted to nose down hard.

It went into an extremely fast full power dive and one of the wings ripped off as I tried to bring it up right before it hit the ground.

Later we found that one of the elevators had ripped off, due to poor build on his part, causing the initial problem.

In turn the wing ripped off because of the enormous forces.

The wing tube was un-bent. The wing flew off pretty much in-tact, but what gave were the wing hold-down bolts.





< Message edited by opjose -- 2/21/2008 8:47:35 PM >

_____________________________

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Build em'', fly em'', crash em'' and build more.

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RE: Extra 330L 80" - 4/30/2008 1:24:17 AM   
aldenfg


 

Posts: 1
Joined: 4/6/2008
From: sarasota, FL, USA
Status: offline 		I ve flown this plane for over a year ....loved it ....the wing tube is not good for 3D flying it will brake ....so if you wanna do 3D make sure to replace it.......I lost my plane because my carbon fiber tube snaped in mid air.....thats the end of it....but it really flyes good ....and looks good in the air.....good lock guys......

(in reply to opjose)
       Post #: 5

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