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All Forums >> RC Airplanes >> Kit Building >> why shorten wings by 1 rib? 4*40
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why shorten wings by 1 rib? 4*40 - 7/29/2003 9:38:43 PM   
brschmid



Posts: 274
Joined: 7/19/2003
From: Moorhead, MN, USA
Status: offline 		why, does it improve roll performance?

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i hope i get to fly today, either full scale or R/C, doesn't matter much to me :D
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why shorten wings by 1 rib? 4*40 - 7/29/2003 9:44:03 PM   
flianbrian



Posts: 329
Joined: 3/21/2002
From: Suthrun, IL, USA
Status: offline 		Less weight to roll around the axis.
Shorter "moment arm" to roll around the axis.
Less air resistance to overcome to roll around the axis.

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why shorten wings by 1 rib? 4*40 - 7/29/2003 9:53:02 PM   
MinnFlyer



Posts: 20197
Joined: 4/22/2002
From: Willmar, MN, USA
Status: online 		Imagine you have a sheet of 1/4" x 4" x 36" balsa in your hands...

Now, wobble it side to side (like banking a wing) as fast as you can.

Now cut it in half and do it again.

This analogy may be a bit severe, but it get the point across.

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Mike B.
AMA# 42400 www.gettingairborne.com

"Those are my principles. If you don't like them, I have others." - Groucho Marx

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why shorten wings by 1 rib? 4*40 - 7/29/2003 10:18:51 PM   
*Crash*Johnson*



Posts: 1089
Joined: 4/12/2003
From: Here, NJ, USA
Status: offline 		Minnflyer, perfect analogy.

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Signature strike.

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why shorten wings by 1 rib? 4*40 - 7/29/2003 10:40:04 PM   
brschmid



Posts: 274
Joined: 7/19/2003
From: Moorhead, MN, USA
Status: offline 		that is what i thought. it is just a clipped wing sorta.

i will leave mine alone when i get it.

_____________________________

i hope i get to fly today, either full scale or R/C, doesn't matter much to me :D

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why shorten wings by 1 rib? 4*40 - 7/30/2003 1:41:21 AM   
LoboFlyer


 

Posts: 131
Joined: 11/2/2002
From: Albuquerque, NM, USA
Status: offline 		Its exactly a clipped wing

Since mine is only my 2nd glow plane I left all the ribs in place and am still pretty happy on its performance.

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Quondo Omni Flunkus Mortati

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why shorten wings by 1 rib? 4*40 - 7/30/2003 2:36:05 AM   
KenLitko


 

Posts: 243
Joined: 1/3/2003
From: Crown Point, IN,
Status: offline 		The airplane should be moving faster as well because there is less wetted area (less drag). This also raises your cruise and stall speeds.

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Ken - http://www.litkoaero.com/
R/C Aircraft Laser Cutting and Design

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why shorten wings by 1 rib? 4*40 - 7/30/2003 6:48:32 AM   
JNorton



Posts: 3151
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		Mine is clipped 1 bay. Landing is still at a slow walk. High rates are 1" Up 5/8" Down. Rolls almost as fast a Dazzler. Just simply a blast.

The only other modification I did was to install a piece of light ply over top of the landing gear block. It is as wide as the fuselage and 1-1/2" long toward the nose of the plane. I put the blind nuts through it and epoxied it into the landing gear block.

Made a couple of landings that should have torn the gear off - pancaked hard - no problem. Just bent the gear back.

John

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why shorten wings by 1 rib? 4*40 - 7/30/2003 8:37:09 AM   
brschmid



Posts: 274
Joined: 7/19/2003
From: Moorhead, MN, USA
Status: offline 		[QUOTE]Made a couple of landings that should have torn the gear off [/QUOTE]
i will probably use nylon bolts, so that they shear off

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i hope i get to fly today, either full scale or R/C, doesn't matter much to me :D

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why shorten wings by 1 rib? 4*40 - 7/30/2003 7:03:39 PM   
JNorton



Posts: 3151
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		Yup, and when they shear off they go right thru the bottom of the wing!

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why shorten wings by 1 rib? 4*40 - 7/30/2003 7:54:19 PM   
brschmid



Posts: 274
Joined: 7/19/2003
From: Moorhead, MN, USA
Status: offline 		[QUOTE]Yup, and when they shear off they go right thru the bottom of the wing[/QUOTE]

maybe not then. i haven't seen the bottom of this plane yet. no one likes ot post pics of the bottoms of there planes

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i hope i get to fly today, either full scale or R/C, doesn't matter much to me :D

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       Post #: 11

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