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Old Mar 26, 2008, 08:49 PM
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Quote:
Originally Posted by new flyer
if any newbies don't understand a term used on rcg or in any flight situation post the term here and i will find and post what it is or how it works

snip
Explain 3D and how it applies to helis.
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Old Mar 29, 2008, 02:43 PM
go flyin or die tryin
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grafton, West Virginia, United States
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3d is a broad term really all it means(to me at least) is being able to fly in about any considarable direction. for instense, foamies are 3d becaose they can fly upside down right side up knife edge hover. if you can think it they can pretty much do it with a heli i would say cp not fixed blade for high manuverability and then you could also go inverted. so if a heli has good power to weight ratio and collective pitch it would in my books be called 3d.
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Old Mar 29, 2008, 06:56 PM
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I'm not really new but what does OBO mean in the sales forums?

Thanks

-CJ
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Old Mar 29, 2008, 07:06 PM
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or best offer
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Old Mar 29, 2008, 07:58 PM
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duh, I should've figured that out on my own

Thanks

-CJ
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Old Apr 07, 2008, 10:27 AM
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What do you use pull-pull systems for?

Here's a link to one: http://www.allerc.com/product_info.p...roducts_id=216
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Old Apr 07, 2008, 02:11 PM
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IMO it gives more power behind the rudder by "pulling and pushing"-given pull pull

they're usually used for your larger scale 3D planes but some people use them on other sizes and types, it's pretty much personal prefrence

-CJ
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Old Apr 08, 2008, 07:35 AM
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Great thread! You guys answered a ton of ? I have one more in relation to wings. What is wash out?
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Old Apr 08, 2008, 05:22 PM
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hmmmm, I cant answer that one

-CJ
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Old Apr 08, 2008, 05:47 PM
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Thanks CJ.
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Old Apr 08, 2008, 05:51 PM
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no problem

-CJ
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Old Apr 08, 2008, 06:31 PM
TGC
AMA1940
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Indian Lake, Ohio
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Quote:
Originally Posted by Pickle72
Great thread! You guys answered a ton of ? I have one more in relation to wings. What is wash out?

WASHOUT : To reduce the tendency of the wing to stall suddenly as the stalling angle is approached, designers incorporate in wing design a feature known as washout. The wing is twisted so that the angle of incidence at the wing tip is less than that at the root of the wing. As a result, the wing has better stall characteristics, in that the section towards the root will stall before the outer section of the wing. The ailerons, located towards the wing tips, are still effective even though part of the wing has stalled.

Practical Application: Twisting the LE of the wing at the tip downward while twisting the TE upward can produce positive washout that is useful in preventing a stall.


TE= trailing edge; LE= leading edge; Root= that area of the wing next to the fuse; fuse= fuselage
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Old Apr 08, 2008, 06:47 PM
TGC
AMA1940
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COG can also be used same as CG = Center of Gravity

AOA = ATTACK, also = AOI = ANGLE OF INCIDENCE
The angle of incidence is the angle at which the wing is permanently inclined to the airplane’s longitudinal axis.

Planform refers to the shape of the wing as seen from directly above. Wings may be rectangular or elliptical or delta shaped. Some wings taper from wing root to wing tip, with the taper along the leading edge or along the trailing edge or, in some cases, with a taper along both edges.

Aspect Ratio of a wing is the relationship between the length or span of the wing and its width or chord. It is computed by dividing the span by the average chord. A wing with a high aspect ratio will generate more lift and less induced drag than a wing with a low aspect ratio.

ROW = Rise Off Water

.
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Old Apr 08, 2008, 06:53 PM
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AMA1940
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Indian Lake, Ohio
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Controls:

R = Rudder

E = Elevator

A = Aileron

T = Throttle

R/E, R/E/T, R/E/A/T


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Old Apr 08, 2008, 06:58 PM
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AMA1940
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Indian Lake, Ohio
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.


AMA = Academy of Model Aeronautics


http://www.modelaircraft.org/


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