Hallo,

I've start Aerial mapping using multicopter, it has very good result with the flexible landing spot, flying still, etc.
But the problem is, what if i have bigger Area to cover?
I'm interesting in fixed wings UAV.
After some reading, I have a question.
What is the benefit of each plane ( Glider oder Flying Wings ?)
Glider like http://aeromao.com or Flying wings like http://www.questuav.com

1. Payload ?
2. Flexibility of Landing and Takeoff spot?
3. Easily control?
4. Better with Arduplane?

My payload will be
- APM
- Sony NEX-7 with stabilization

Thanks

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Take a look at RV jet . Payload is the best i've seen on a wing .  Its a new company , so be patient . Don't go with a glider . I've yet to see a glider that has any decent payload . The glider require a fair amount of wind and is not as agile . I've yet to see any professional use a glider for photo / agriculture . Yes , landing can be tricky at times  ( But this is also true with RC plane as dirt road , grass can be hard on a plane and its landing ) . A Agriculture ariel company told me that they land their flying wing in the corn or soybean field . Wing has long flight time . Handle the wind . RV jet has the ability to fly up to 10 miles ( maybe further , still being tested as to its limits ) . Climbs really well .

RangeVideo a new company?
Actually they've been around for quite a while now.

The wing is new  (RV jet ) . As you know it just came out this summer . Yes the company been around for a while .

flying wings are inherently unstable and flying fly can be troublesome sue to less internal space but mostly due to wing waggle as flying wings cannot fly as high speed as the equivalent size traditional plane

Hi jarad. I'm not sure where you have your information from but you are very wrong. A flying wing is more efficient due to lower drag, they are tougher and climb very fast. My X5 flies at over 80mph with a camera and climbs almost vertically on less than 200watts. I get 20km flights on 3200ma 3s batteries. Now over 70 flights with no damage. It will also cruise at less than 12m/s. flying wings are not unstable but the CG must be respected.

Did i say they were less efficient?, no i did not....

and yes they are more unstable, why do you think most planes are traditional rather than Zagi?

it is because they are unstable in flight, this makes them maneuverable but also adds instability.

If flying wings were so great why are they still so rare, it is because of the reasons i gave.

I have a skyhawk and a FPVraptor, they are similar in size and weight however the video is much smoother on the traditional raptor, and i can fly faster without wing waggle.

Jarad,

 

Wings are not more unstable, if your wing is unstable then your CG is not correct. My X5 and my home designs all will fly very happily and stable without either me operating the RC and with the APM in Manual. 

Wings are not rare, look at all the wings on this site, X8's, X5'x, Raptors home builts and many more. The truth is that wings give less trouble than your conventional aircraft and so you don't see people asking questions , they are too busy flying.

If your wing is waggling then you need to fix something, Stability has nothing to do with maneuverability. they are two very different issues.

I also fly normal aircraft and have done for 40yrs.

Wings are King in every department except one??? They CAN be difficult to ship to customers once the 2 wings are joined.

Dwgsparky

 

 

  

Hi Jarad

If you still think flying wings are bad then take a look at some of the very best videos on you-tube taken by the EXPERTS at team Black Sheep. 

The videos they produce are fantastic and beautifully flown at both high and very low levels. Guess what....They use Flying wings for almost every video.  

It is true to say that they have been very inspirational to many fliers on this site.

 

 

dude it is the law of physics here, Flying wings ARE by the nature of physics more unstable than traditional designs.

Read this 

Design issues[edit source | editbeta]

A clean flying wing is sometimes presented as theoretically the most aerodynamically efficient (lowest drag) design configuration for a fixed wing aircraft. It also would offer high structural efficiency for a given wing depth, leading to light weight and high fuel efficiency.

Because it lacks conventional stabilizing surfaces or the associated control surfaces, in its purest form the flying wing suffers from the inherent disadvantages of being unstable and difficult to control. These compromises are difficult to reconcile, and efforts to do so can reduce or even negate the expected advantages of the flying wing design, such as reductions in weight and drag. Moreover, solutions may produce a final design that is still too unsafe for certain uses, such as commercial aviation.

Further difficulties arise from the problem of fitting the pilot, engines, flight equipment, and payload all within the depth of the wing section. A wing that is made deep enough to contain all these elements will have an increased frontal area, when compared with a conventional wing and fuselage, which in turn results in higher drag and thus slower speed than a conventional design. Typically the solution adopted in this case is to keep the wing reasonably thin, and the aircraft is then fitted with an assortment of blisters, pods, nacelles, fins, and so forth to accommodate all the needs of a practical aircraft.

Other known problems with the flying wing design relate to pitch and yaw. Pitch issues are discussed in the article on tailless aircraft. The problems of yaw are discussed below.

Directional stability[edit source | editbeta]

For any aircraft to fly without constant correction it must have directional stability in yaw.

Flying wings lack the long fuselage, the component that provides a convenient attachment point for an efficient vertical stabilizer or fin.

Any fin must attach directly on to the rear part of the wing, giving a small moment arm from the aerodynamic center, which in turn means that to be effective the fin area must be large. This large fin has weight and drag penalties, and can negate the advantages of the flying wing. The problem can be minimized by increasing the leading edge sweepback and placing twin fins outboard near the tips, as for example in a low-aspect-ratio delta wing, but many flying wings have gentler sweepback and consequently have, at best, marginal stability.

Another solution is to angle or crank the wing tip sections downward with significant anhedral, increasing the area at the rear of the aircraft when viewed from the side.

Yet another approach uses differential twist or wash out, together with a swept-back wing planform and a suitable airfoil section. Prandtl, Pankonin and others discovered this and it was fundamental to the yaw stability of the Horten brothers flying wings of the 1930s and 40s. The Hortens described a “Bell Shaped Lift Distribution” across the span of the wing, with more lift in the center section and less at the tips due to their reduced angle of incidence, or washing out. This creates a slightly forward-pointing lift vector for the rear (outer) section of the wing. When displaced, this vector essentially "pulls" the trailing wing forward to re-align the aircraft along its flight path.[16]

Yaw control[edit source | editbeta]

In some flying wing designs, any stabilizing fins and associated control rudders would be too far forward to have much effect, thus alternative means for yaw control are sometimes provided.

One solution to the control problem is differential drag: the drag near one wing tip is artificially increased, causing the aircraft to yaw in the direction of that wing. Typical methods include:

  • Split ailerons. The top surface moves up while the lower surface moves down, to create an air brake effect.
  • Spoilers. A spoiler surface in the upper wing skin is raised, to disrupt the airflow and increase drag. This effect is generally accompanied by a loss of lift, which must be compensated for either by the pilot or by complex design features.
  • Spoilerons. An upper surface spoiler that also acts to reduce lift (equivalent to deflecting an aileron upwards), so causing the aircraft to bank in the direction of the turn—the angle of roll causes the wing lift to act in the direction of turn, reducing the amount of drag required to turn the aircraft's longitudinal axis.

A consequence of the differential drag method is that if the aircraft maneuvers frequently then it will frequently create drag. So flying wings are at their best when cruising in still air: in turbulent air or when changing course, the aircraft may be less efficient than a conventional design.

Did I say they are bad... no I said traditional aircraft are more stable and have higher storage vs efficiency

The fact is a traditional mkdel is more suited fir this guy
You look at black sheep chase videos and notice how the leading plane zooms all over the place
This guy wsnts reliability and stability which are two things flying wings dont beat traditional models over
Not to mention most hardware has only rudementary support for zagis even the apm doesnt have a dedicated zagi flight configuration

I think you are trying to justify your planebecause you own one but I doubt you have tried to fly fpv with one.
Zagis cost more have to be hand or sling launched which is a negative etc etc
A traditional plane for airial mapping and photography is a must

MaerialPhoto wants a  plane for mapping and photography, he never mentioned FPV which for the record is easy with flying wings.

In answer to the question raised, Both have advantages and disadvantages. If you want a long range, high payload stable aircraft then go and get a Skywalker X8. Plenty of room for everything and lots of information and support on DIY drones

You cannot compare full size aerodynamics to model aircraft , they are very different, ask anyone who has tried to fly an exact scale Spitfire as an RC model.

 I don't thing I need to make my wings thick enough for a pilot. !

I own 16 conventional aircraft and 4 flying wings, I am not trying to justify one over the other. I don't need to do that.

I also produce aircraft for mapping purposes that I sell to my customers, they all get great results and that aircraft IS a flying wing. The customers like them because they are almost indestructible. They DO land them in corn fields, roads and on dirt tracks that would destroy your Skyhawk on its first landing.

The APM has full support for all flying wings and it works,

I will agree that wings need to be hand launched OR you can use a catapult if you want perfect launches. (yes, I sell Catapults as well) Flying wings CAN be dangerous due to the rear mounted propeller during hand launching.

With that I feel I have answered the question and I will leave you to continue trying to justify your own personal preference to MAerialPhoto.

Have fun

dwgsparky

 

Did you think to Paragliders for this purpose?

Payload 1.5 -2 kg

Parafoil with this or you can DIY.

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