rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 491 ONLINE 45 EVENTS SEARCH REGISTER  START HERE
 
1 page1461 viewsPOST REPLY
MTA Hobbies . Model Rectifier Corp . PowerHelis

.
.
UAV Autonomous Unmanned Aerial Vehicles > definition of an UAV?
 
 
astro-g
Heliman
Location: Wellington, New Zealand

any takers?
take for example, a paper dart.
Im not onboard piloting it(unnmanned)
Im not remotely controlling it(autonomous)
it flies, in case im confused and that should be aerial
vehicle? do I need to write a note on the paper first so its perfoming a task?
12-07-2003 Over year old.
 
 
Spencer K
Senior Heliman
Location: Camarillo, CA / Phoenix, Az

im pretty sure it is a remotly controlled (or at least pre-programmed) without any passengers.
12-07-2003 Over year old.
 
 
MPA
Elite Veteran
Location: Australia

A UAV is capable of autonomous operation being it follows a programmed flight.

Without the computer you just have an RPV (remote piloted vehicle) and needs to be flown manually throughout the operation.
An RPV must have constant contact with the craft to control it same as RC models.

A UAV can fly from one point to another without constant base contact controlling it and will hold a flight pattern until it recieves its next instructions or may be programmed to land at a destination by its own control systems.
12-07-2003 Over year old.
HOMEPAGE  
 
 
astro-g
Heliman
Location: Wellington, New Zealand

so its a free flight model
(re the paper dart)
the programmed flight depends on how good my aim is of course

dont mind me, im just being contrarian

where does something stop being dumb and start being a UAV?
12-07-2003 Over year old.
 
 
MPA
Elite Veteran
Location: Australia

No the paper dart is a projectile.
The UAV perfoms operations based on the conditions in flight that a projectile doesnt.
A projectile is a preset path of flight, not to be mistaken with a pre set number of instructions to follow accounting for conditions in flight.

A projectile may have winged areas to aid its path.
12-07-2003 Over year old.
HOMEPAGE  
 
 
astro-g
Heliman
Location: Wellington, New Zealand

so what if we change to a free flight glider, with a de-thermaling timer, or preferably a pressure based device with a similar purpose?

I was being silly with the paper dart, but I really do want to know where the boundry between a dumb model, and UAV is.
12-08-2003 Over year old.
 
 
Spencer K
Senior Heliman
Location: Camarillo, CA / Phoenix, Az

a paper airplane is ballistic. anything thrown without means of control follows a ballistic course.
12-08-2003 Over year old.
 
 
MPA
Elite Veteran
Location: Australia

Quote 
a paper airplane is ballistic



A paper dart / plane is not ballistic.

Projectile is the object.
Ballisitc is the speed a projectile travels, that'd be faster than the speed of sound.
12-08-2003 Over year old.
HOMEPAGE  
 
 
MPA
Elite Veteran
Location: Australia

astro-g

Quote 
free flight glider, with a de-thermaling timer


Those would be advanced flight systems to aid or terminate flight but thats all.

A UAV has a set of instructions to follow and it must make corrections to flight control system to ensure the set of instructions are adhered to.

A timer for example would not take into account conditions and thus the event would occur even if the thing is still in the car boot.

A UAV is smart enough to know it is not flying and wont perform the event until it gets to where that event should be done regardless of time variations due to flight conditions.
12-08-2003 Over year old.
HOMEPAGE  
 
 
vince
Senior Heliman
Location: Victoria BC Canada

By definition UAV is Unmanned Aerial Vehicle.
Every RC aircraft is a UAV by definition.
Stick the word autonomous in front of UAV then you have what this forum is about.

check out micropilot.com or bells kick ass autonomous machine

http://www.bellhelicopter.textron.c..._eagle_eye.html

Project Deep water is where you will see Bells machine first.
The USA is investing heavily into this so called new tech a 1 billion this year alone, Even thow canada had one of the first battle ready machines in 1968.
for more info check out Momentum 2003 here you will find to much info on the Commercial acceptance of these new vehicle.
12-10-2003 Over year old.
 
 
MPA
Elite Veteran
Location: Australia

Maybe in Canada vince but for the rest of us UAV is unmanned and that aint just referring to the lack of someone sitting in it.

A UAV flies without a man, on the ground or in the air in the aircraft.

Anything that requires a man to fly it is simply an aircraft, if the man is on the ground it is simply a remote control aircraft.
That's the definition of the USA navy, army and UK MoD in UAV submissions from senior officers in those services.

In previous wars a remote aircraft was an RPV.
Mere remote control is not a UAV.

Some like to call their remote subs and aircraft a UAV but they are just wishfull thinking out loud
12-10-2003 Over year old.
HOMEPAGE  
 
 
Spencer K
Senior Heliman
Location: Camarillo, CA / Phoenix, Az

ballistic is the course an object travels that is uncontrolled. yes, you are right a bullet is ballistic, because it is not controlled. ballistic has nothing to do with speed however.
12-12-2003 Over year old.
 
 
MPA
Elite Veteran
Location: Australia

it is not just the fact it is not controlled but refer to the force and velocity as well.
Ballistics is all emcompasing of force, velocity, path of flight and action of firing mechanism.
Ballisitcs can refer to the firing mechanism of a gun.
Ballisitcs can also refer to the velocity, and may refer to the force.

you are right that it is not specifically refering to the speed only but speed is not exluded and is one of the most important factors of ballistics.

If you want to be pure on it then Ballisitcs is derived from Ballista meaning "to hurle and object"

In application a Ballistic pendulum is designed to measure the force velocity.

An object hurled at less than the speed of sound is unlikely to have the velocty that could be categorised as ballisitics due to the path as you mention and the force.
Where much force applies without much velocity the weight required at the force would render the path it travels short and predictable.
(on your foot)
In short, misthrowing a house brick and dropping it on your foot doesnt fall into the category of ballisitics.
(It might make you "go ballistic")

There has to be a given level of velocity of the object fired by machine before you need to study the effects and the path it travels.
Those who study ballistics dont study the flight path of house bricks.
12-12-2003 Over year old.
HOMEPAGE  
 
 
r2160
Senior Heliman
Location: Sydney,Australia

Then you get the definition of ICBM - intercontinental ballistic missile which was a missile that is directed, controlled if you will to hit a particular site.

Glenn
12-19-2003 Over year old.
 
 
1 page1461 viewsPOST REPLY
JR-Spektrum . Gyro Hobbies . E-flite

.
.
UAV Autonomous Unmanned Aerial Vehicles > definition of an UAV?
  UPDATE SCREEN   PRINT TOPIC Advertisers 

Subscribe to This Topic

Saturday, August 30 - 2:09 pm - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie