ما رأيك أن نحاول صنع طائرة

[علي جنيدي]

وعد الحر دين عليه
http://www.angelfire.com/blues/heli_project/
أنا صنعت مثلها ولكن نقصني محركات السيرفو التي ستصل بعد شهر تقريبا فالطائرة تطير إلى الأعلى والأسفل فقط

[عالم الصمت]

بالتوفيق اخوووي خطووة جيدة

[MeLeE]

وعد الحر دين عليه
http://www.angelfire.com/blues/heli_project/
أنا صنعت مثلها ولكن نقصني محركات السيرفو التي ستصل بعد شهر تقريبا فالطائرة تطير إلى الأعلى والأسفل فقط

اخوي تعرف مكان في الامارات وين ممكن احصل هاذي القطع ؟؟؟ او موقع على النت ؟

[علي جنيدي]

صراحة لا ولكن سأنزل بعد شهر عندما تكتمل كل شيء عن كيفية صنعها

[عمر الأنصاري]

معليش على القافة بس ايش رايك تخلينا نصنع سيارة بدل الطائرة احسن

[عمر]

صراحة لا ولكن سأنزل بعد شهر عندما تكتمل كل شيء عن كيفية صنعها

يا الله ,,
يجوز أقدر أسوي وحدة ... ويتحقق حلم من 8 سنين ..
منتظريك أخ علي ..

بالتوفيق

[علي جنيدي]

سيارة أم طائرة كلو سهل

[MeLeE]

سيارة أم طائرة كلو سهل

اخوي خل نصنع طياره بعدين فكر فلسياره ... يالله ننتنضر ...

[MeLeE]

اكتشفت ان المشروع لايمكن تحقيقه الى لو شريت كل القطع جاهزه وعلي انا التركيب , شو الفأده ؟؟

[فتى البرمجة]

لنوقف الكلام والنقاش الذي لا فائدة منه ونبدأ التصميم والعمل انا حاولت عمل طائرة هيليكوبتر سيارة..... وللأسف لم انجح الا في السيارة اما في هذا المشروع انا اقترح التصميم القادم

[MeLeE]

لنوقف الكلام والنقاش الذي لا فائدة منه ونبدأ التصميم والعمل انا حاولت عمل طائرة هيليكوبتر سيارة..... وللأسف لم انجح الا في السيارة اما في هذا المشروع انا اقترح التصميم القادم

اخوي للاسف لا سياره ولا هلكبتر , اذا مشروع الطياره (الاسهل ) محد سواه !!

شباب مثل ما بديتو المشروع كملوه !! كم واحد من الاعضاء نجح وياه المشروع ؟ + ماشفت شرح للمشروع اصلا ؟ يعني بس موقع انا داخلنه قبل 4 اشهر اليوم ادخله مره ثانيه .

[AL ADMIRAL]

اخوي للاسف لا سياره ولا هلكبتر , اذا مشروع الطياره (الاسهل ) محد سواه !!

شباب مثل ما بديتو المشروع كملوه !! كم واحد من الاعضاء نجح وياه المشروع ؟ + ماشفت شرح للمشروع اصلا ؟ يعني بس موقع انا داخلنه قبل 4 اشهر اليوم ادخله مره ثانيه .

أخ MeLeE مشروع السياره سهل
أنا في الأبتدائي سويت سفينه (السياره قريبه من السفينه)
بس الطياره غير يا حبيبي
ليه
السياره و السفينه بس حط الأشياء وحتسير معاك (حتمشي وحتلف) بس يمكن تكون مو سريعه مو سلسه مو ...

أما الطياره فلازم تتغلب على وزنها وهنا تكمن المشكله الأولا
أما المشكله الثانيه وهي توازنها في الهواء
أنا مني قاعد أحبطكم بس أتكلم جد

أنا جاتني هديه طياره لاسلكيه (زي الي تبو تسوها هلكبتر) هذا اسالفه قريبه مالها 6 أشهر
طبعا مالي أي خبره في قيادتها قلت شغل وجرب
شغلتها أول مره طيرتها فوق بسرعه وخبطها في الأرض (راس الطياره البلاستك طاح) قلت مافي مشكله
مله داعي أركبه طيرتها مره ثانيه طارت فوق فوق أحول ألف يمين يسار مافي توازن (طلع لزم يكون رس الطياره فيه أشان التوازن) طبعا هي أول مره طيرتها وأخر مره ((راحت بعيد مره ومدري فين طاحت لأني كنت ألعب فيها في منطقه سكنيه))
تخيل أشان قطعت البلاستك فقدت التوازن

على العموم هذا الموضوع لو تبو تكملو فيه خذوه بجديه أكثر

والسلام عليكم

[علي جنيدي]

والله الحق علي أنا لأنو كنت لازم فضي حالي واشرحلكم عن تجاربي في المشروع
سامحوني و اصبروا علي

[علي جنيدي]

How can helicopter flyGENERAL

This is just the basic informations for the beginners which did not know any things about the helicopter or airplane before and wants to know some principles that why the helicopter can fly but not in deep details. For the people that want to know more than what I have in here, please go to the text book which have many professors wrote them or go to the specific helicopter manuals. The details about the helicopter has so much to put it all in the WEB.

INTRODUCTION

The wings of the airplane create a lift force when they move through the air. As we known,during flight, there are four forces acting on the helicopter or airplane and those are LIFT , DRAG , THRUST ,and WEIGHT .(please go back and see on What makes an airplane fly ? section).In order to make the wings to move through the air , of course, the plane itself has to move. A helicopter works by having its wings move through the air while the body stays still. The helicopter's wings are called Main Rotor Blades. The shape and the angle of the blades move through the air will determine how much Lift force is created. After the helicopter lifted off the ground, the pilot can tilt the blades, causing the helicopter to tip forward or backward or sideward.

NOMENCLATURE AND TECHNICAL TERM

Although we will describe certain terms or parts of helicopter more in the next sections as we go along, but we should familier with all of these terms in order to understand the helicopter better.

Bernoulli'principle :This principle states that as the air velocity increases, the pressure decreases; and as the velocity decreases, the pressure increases .

Airfoil : is technically defined as any surface, such as an airplane aileron, elevator, rudder, wing, main rotor blades, or tail rotor blades designed to obtain reaction from the air through which it moves.

Angle of Attack : is the acute angle measured between the chord of an airfoil and the relative wind.

Angle of Incidence : is the acute angle between the wing's chord line and the longitudinal axis of the airplane. (usually manufacturer had built the aircraft with the wing has some degrees to the horizontal plane or airplane longitudinal axis).

Blades : The blades of the helicopter are airfoils with a very high aspect ratio ( length to chord ). The angle of incidence is adjusted by means of the control from pilots.
The main rotor of the helicopter may have two, three,four , five or six blades, depending upon the design. The main rotor blades are hinged to the rotor head in such a manner that they have limited movement up and down and also they can change the pitch ( angle of incidence ). The controls for the main rotor are called Collective and Cyclic Controls.

The tail rotor is small blades may have two or four blades and mounted on the tail of the helicopter,it rotates in the vertical plane. The tail rotor is controlled by the rudder pedals. Its pitch can be changed as required to turn the helicopter in the direction desired.

Blade Root : The inner end of the blades where the rotors connect to the blade gripos.

Blade Grips : Large attaching points where the rotor blade connects to the hub.

Rotor Hub : Sit on top of the mast , and connects the rotor blades to the control tubes.

Main Rotor Mast : Rotating shaft from the transmission which connects the main rotor blades to helicopter fuselage.

Pitch Change Horn : to converts control tube movement to blade pitch. Control tube is a push-pull tubes that change the pitch of the rotor blades through the pitch changing horn.

Swash Plate Assembly : The swash plate assembly consists of two primary elements through which the rotor mast passes. One element is a disc, linked to the cyclic pitch control. This disc is capable of tilting in any direction but does not rotate as the rotor rotates. This non-rotating disc, often refered to as the Stationary Star is attached by a bearing surface to a second disc, often refered to as the Rotating Star which turns with rotor and linked to the rotor blade pitch horns.

Transmission : The transmission system transmits engine power to the main rotor, tail rotor, generator and other accessories. The engine is operated at a relative high speed while the main rotor turns at a much lower speed. This speed reduction is accomplished through reduction gears in the Transmission System

Lift : is produced by a lower pressure created on the upper surface of an airplane's wings compared to the pressure on the wing's lower surfaces,causing the wing to be LIFTED upward. The special shape of the airplane wing (airfoil) is designed so that air flowing over it will have to travel a greater distance and faster resulting in a lower pressure area (see illustration) thus lifting the wing upward. Lift is that force which opposes the force of gravity (or weight).

Lift depends upon (1) shape of the airfoil (2) the angle of attack (3) the area of the surface exposed to the airstream (4) the square of the air speed (5) the air density.

Relative Wind : is the direction of the airflow with respect to an airfoil or to the rotor blades.

Pitch Angle : The rotor blade pitch angle is the acute angle between the blade chord line and the rotor plane of rotation.( you may understand as the angle of incidence ) . This pitch angle can be varied by the pilot through the use of cockpit controls ( collective and cyclic pitch control ).

http://www.thaitechnics.com/helicopter/heli_intro.html

© 2001-2007 Thai Technics.Com. All Rights Reserved.

[علي جنيدي]

What Makes An Airplane Fly GENERAL

This is just the basic informations for the beginners which did not know any things about the aircraft or airplane before and wants to know some principles that why the airplane can fly but not in deep details. For the people that want to know more than what I have in here, please go to the text book which have many professors wrote them and the details about the airplane have so much to put it all in the WEB.

INTRODUCTION

It was , of couse, the birds who were responsible for the whole complicated story and business. A man with the brain of a scientist began to think seriouly about attainment of the dream. This was Leonado da Vinci (1452-1519), whose detail study of bird flight nevertheless led him to the erroneous conclusion that man's muscular power, so superior to that of the birds, should enable him to fly in a properly constructed ornithopter,or flapping-wing aircraft.

In 1680, Giovanni Alphonso Borelli's has a result of his detailed study of bird flight, man did not have the power output needed to lift himself and a machine into the air. This brought an end to practically all heavier-than-air experiments until nineteenth century.

On October 15, 1783, Jean-Francois had made a flight in a Mongolfier hot-air balloon tethered flight for 4 minutes 24 second. Lessthan two month later a hydrogen-filled balloon had completed a successful two-hours free flight.

German Otto Lilienthal(1848-1896), whose graceful and beautifully-constructed hang-gliders enable him to become the first man in the world to fly confidently and regularly, total more than 2000 flights.He did not develop control surfaces for his gliders, but rely on body movements to provide limited control in the three axes of pitch, yaw, and roll. He lost his life at age of 48 on 10 August 1896 due to one of his gliders stalled and crashed to the ground. The persons who pioneer of the gliders were Otto Lilienthal (German), Percy Pilcher (England) He also lost his life in a glider clashed three years after Lilienthal, and Octave Chanute (American)(1832-1910)

Wilbur (1867-1912) and Orville (1871-1948) Wright, had been interested in the possibility of mechanical flight in the early years. By 1900, they became freinds with Chanute . Chanute encouraged , providing information, and directly assisted the Wrights to achieve their goal of power flight later.First flight they flied the flyer was on 17 December 1903.This is generally accepted as the first man to accomplised the dream.Eventhrough there are some controversy over the first powered aircraft.

Alberto Santos-Dumont a little brazilian living in France. During 1906, with his No.14-bis which was power by a 50 horsepower Antoinette engine, he made a first flight of 60 meter at Bagattelle, Paris on 23 October 1906. Some people believed that Santos-Dumont really had made the first power flight in history.

NOMENCLATURE or TECHNICAL TERM

Although we will describe certain terms or parts of airplane more in the next sections as we go along, but we should familier with all of these terms in order to understand the airplane better.

Aerodynamics : Aero is derived from the Greek word meaning AIR, and Dynamics comes from the Greek word meaning Power, or branch of physics which considers bodies in motion and the forces that produce or change such motion. When Aero is combined with Dynamics ,we have Aerodynamics,Meaning " The science relating to the effects produced by air or other gases in motion".

Air Currents : are movement of the air with respect to the earth. If the air is rising from the earth , it is called a Vertical Current

Relative Motion : Motion is a movement.If an object changes it position,it is in motion. Relative Motion defined as an object which has moved or has changed its position with Respect to some other object. An Airplane must have Relative motion between Airplane and the Air in order to fly.The velocity of this motion is called the True Airspeed

Bernoulli'principle : This principle states that as the air velocity increases, the pressure decreases; and as the velocity decreases, the pressure increases .

Airfoil : is technically defined as any surface, such as an airplane aileron, elevator, rudder, or wing, designed to obtain reaction from the air through which it moves.

Angle of Attack : is the acute angle measured between the chord of an airfoil and the relative wind.

Cockpit : is the pilot's compartment which is seperated from the rest of the cabin.

Control Stick or Control Column : A vertical lever or column by mean of which the pilot operates the longitudinal and lateral control surfaces of the airplane. The elevator is operated by fore-and-aft movement of the stick or column, and ailerons are moved by sideways movement of the stick or turn the wheel to left or right.

Aileron : One of a pair of movable control surfaces attached to the trailing edge of each wing tip, the purpose of which is to control the airplane in roll by creating unequal or opposing lifting forces on the opposite sides of the airplane.

Elevator : A movable auxiliary airfoil or control surface designed to impress a pitching movement on the airplane, that is, to cause rotation about the lateral axis.

Flap : A hinged, pivoted, or sliding airfoil or plate, normally located at the trailing edge of a wing, extended or deflected to increase the lift and/or drag, generally used at takeoff and landing.

Rudder : A hinged or movable auxiliary airfoil used to impress a yawing moment on the aircraft.

Rudder Pedal : Either one of a pair of cockpit pedals for operating a rudder or other directional control device. The pedals are on the floor and feet operated.

Stabilizer : A fixed or adjustable airfoil or vane that provides stability for an aircraft.

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