Посты с тэгом: delta wing

Darkwing FPV Drone Fiberglass Composite Electric Flying Wing

Published: February 20, 2012 pm29 7:25 pm

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I would love to call this the Bat Wing, but Darkwing seems to fit well on this wicked FPV drone flying wing by HK. A wing span of 1727mm, its a perfect design for stability and enough wing surface to keep this beautiful fiberglass composite flying wing sky high.

The fuselage and winglets are made from sturdy fiberglass and the wings are made from balsa wood and monocoted for a slick black flying wing with red minimal decals.   I love delta flying wings due to its stability, easy control surfaces ( 2 servos only ) for easy mixing, it has a pretty big hatch and fuse for any size Lipolys and FPV equipment. The only downfall in my opinion is the launching of the bird, it will be pretty difficult to hand launch it so a bungee must be used or a launch ramp, could be tedious for a bind and fly plane but putting all that aside, this is one mean looking black flying wing.

Specs are:
glassfiber fuselage
Massive payload capability
Plug in wings for easy transportation
Wingspan: 1727mm
Length (fuselage): 762mm
Wing Area: 49.3dm2
Dry Weight: 1400grams

Requires:
Your own 4 channel TX/RX with delta mixing
42mm Brushless Outrunner motor
60A~80A ESC
2 x Standard size MG servo
3700mAh~5000mAh 4s Lipoly battery
FPV Equipment if desired.

In terms of servos, i would use the BMS-A206 MG Digital Mini Servo

BMS-A206 MG Digital Mini Servo

Here are some picturs of the Darkwing Electric  Flyign Wing

FPV Drone composite flying wing black

Darkwing FPV Drone fiberglass electric composite flying wing

fiberglass composite flying wing

ParkZone Micro Stryker Brushless Delta Wing 180

Published: January 18, 2012 pm31 5:24 pm

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Just when i had an idea of creating a micro wild wing, i noticed ParkZone beat me to it. The very slick and micro Stryker, using a 180 size brushless motor which is around 10 grams, spinning at 3000Kv on a 3.75×3 propeller, this little guy flies great, of course with a hefty price tag of $160. They call it Ultra Micro Series F-27Q Stryker but i would not call it Ultra, its small enough with a wing span of 17″, it uses the AR6400NBL which one would think its the lightest spektrum receiver at 7.8grams, the AR6115 only weighs at 3.3grams, strange choice by ParkZone.

I think i will be cutting some micro wild wings very soon at 20″ wing span, using the AR6115 on 2 linier servos from hobbyKing on a 6amp ESC and 10 gram 180 size brushless motor. No rudder needed really.

For now, here are some pictures of the ParkZone Micro Stryker Brushless Delta Wing

ParkZone-Micro-Stryker-Brushless-Delta-Wing

ultra micro f27q

mini stryker parkzone horizon hobby

Airplane Wing Geometry and Configurations

Published: December 17, 2009 pm31 3:01 pm

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Plane wing configurations and wing shapes

Aircraft wings are built with many shapes and sizes for  desired flight characteristics of an airplane  to achieve greater lift, balance or stability in flight.
Here are some different wing types:

delta wing
Thin triangular wing that is especially aerodynamic.
CF-18_Donatello-delta-wing

variable geometry wing
Arrow-shaped wing found on combat aircraft; the angle it forms with the fuselage can be changed in flight.
f14a5-variable geometry wing

tapered wing
Wing that is perpendicular to the fuselage and whose width decreases toward the tip.
0806022_6tapered wing

straight wing
Long wing of consistent width and perpendicular to the fuselage; it is found on low-speed planes such as cargo and light planes.
straight wing plane

swept-back wing
Arrow-shaped wing that is found on jet planes.
747-8-swept-back wing

The figure below also shows the common wing forms and configuration.
airplane-wing-forms-configuration

Wing configurations

The F-14 Tomcat is a supersonic aircraft with a variable geometry wing. This aircraft wing geometry changes according to flying speed by swinging the wings forward and backward.
F-14 Tomcat


Aspect Ratio

Aspect ratio is an indicator of the general performance of an aircraft wing. In aerodynamics, the aspect ratio of a wing is defined as the square of the span divided by the wing area. It is a measure of how long and slender a wing is from tip to tip.
wing Aspect Ratio

For “high” aspect ratio aircraft wing indicates long, narrow wings, whereas a “low” aspect ratio wing indicates short and stubby. Higher aspect ratio has the effect of a higher rate of lift increase, as angle of attack increases, than lower aspect ratio wings.

Respect ratio2

High aspect ratio wing – higher Lift Coefficient
lower stalling angle of attack. eg. Gliders

Low aspect ratio wing – lower Lift Coefficient
high stalling angle of attack… eg. Fighter Jets

However because wings may have varied plan forms it is usual to calculate aspect ratio as:

Aspect ratio = wing span² / wing area = Wing span / Chord length

Dihedral Angle

The purpose of dihedral is to improve the aircraft stability during flight. Dihedral angle is added to the wings for later or rolls stability. When the aircraft encounters a slight roll displacement caused by distribute from air stream or a gust of wind.  An aircraft wings with some dihedral will naturally return to its original position.

The front view of this wing shows that the left and right wing do not lie in the same plane but meet at an angle. The aircraft’s wing is inclined upward an angle from root to tip. The angle that the wing makes with the local horizontal is called the dihedral angle.
This is the reason why most commercial airliners such as the 747 or 737  have a dihedral wing for stability.

Anhedral Angle

Highly maneuverable fighter planes, on the other hand do not have dihedral but rather  have the wing tips lower than the roots giving the aircraft a high roll rate such as the harrier GR7  jets. A negative dihedral angle is called anhedral.
Harrier jet2