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ICPTT 2009, Advances and Experiences With Pipelines and Trenchless Technology for Water, Sewer, Gas, and Oil Applications

Creator: Mohammad Najafi, Baosong Ma | 2009-12-30

They plan to equip methane laser detection equipment on the helicopters to make the flight more efficiency. ... 2003): ()]2 RC ×− ≈ νσ (1) [ ] 1[)2/(2 0 R SPP ηρ Here: 0P and P denote the power of outgoing laser and the power of ...

Publisher: Amer Society of Civil Engineers

About this book
This proceedings contains 227 papers which were presented at the International Conference on Pipelines and Trenchless Technology (ICPTT), held on October 18-21, 2009, in Shanghai, China.



64 pages

Inside the U.S. army today

Creator: Gordon L. Rottman | 1988-11-24

Laser-guided munitions such as the artillery- fired Copperhead and the Hellfire are guided to the target by illuminating it with a laser spot generated from a laser designator mounted in another AH-64, an OH-58C scout helicopter, ...

Publisher: Osprey Publishing

About this book
When conscription was eliminated in the early 1970s, the US Army found itself with a very different kind of soldier. While the personality of the Army remained the same, the organization of its higher levels of command and combat formations, and the internal structure of its units underwent major changes under the 'Army of Excellence' program of the 1980s. This book explores the US Army of the late 80s, including the training methods, weapon systems, Reserve Components, organization and uniforms of one of the world's most potent fighting forces. The text is illustrated with numerous photographs and eight colour plates.



154 pages

A potential field based formation control methodology for robot swarms

Creator: Laura E. Barnes, University of South Florida | 2008

6.1.2 Radio-Controlled Helicopter In order to demonstrate UAV-UGV swarm coordination an autonomous RC helicopter is ... of skids with an incorporated pan tilt unit for a Sony block camera. Sensors include a GPS unit, an IMU, and laser.

Publisher: ProQuest

About this book
A novel methodology is presented for organizing swarms of robots into a formation utilizing artificial potential fields generated from normal and sigmoid functions. These functions construct the surface which swarm members travel on, controlling the overall swarm geometry and the individual member spacing. Nonlinear limiting functions are defined to provide tighter swarm control by modifying and adjusting a set of control variables forcing the swarm to behave according to set constraints, formation and member spacing. The swarm function and limiting functions are combined to control swarm formation, orientation, and swarm movement as a whole. Parameters are chosen based on desired formation as well as user defined constraints. This approach compared to others, is simple, computationally efficient, scales well to different swarm sizes, to heterogeneous systems, and to both centralized and decentralized swarm models. Simulation results are presented for a swarm of four and ten particles following circle, ellipse and wedge formations. Experimental results are also included with a swarm of four unmanned ground vehicles (UGV) as well as UGV swarm and unmanned aerial vehicle (UAV) coordination.


Helicopters Directory

Air Hogs Havoc Heli Laser Battle Set - RC Vehicles
The Air Hogs Havoc Heli Laser Battle from Spin Master comes with two Havoc micro helicopters for double the fun. These special helicopters are equipped with infrared ...

Jada Battle Machines Air vs. Land RC heli vs. laser turret ...
See the review at http://RCMania.com/jada-battle-machines-air-vs-land-rc/ Jada Battle Machines Air vs. Land RC heli vs. laser turret!

Best RC Helicopters for Sale | Buy Remote Control ...
HobbyTron.com sells RC helicopters with wifi cameras. We are the largest retailer of durable remote controlled helicopters. Buy online today!

RoboCombat Laser Tag Battle 2.5CH RC Heli 2-Pack Bundle
Play Laser Tag in the air with a 2-Pack of the RoboCombat GYRO Laser Tag Battle Electric IR RTF RC Helicopter!

Best Indoor/Outdoor RC Helicopters For Sale | RC ...
There are indoor and outdoor remote control helicopters for sale.What is the best RC helicopter for beginner? We collect the best RC helicopter reviews 2012.


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Editor's picks

  • Spin Master

    Air Hogs RC - Zero Gravity Laser Racer - Blue

    Toy (Spin Master)

    Rating (164 reviews):
    (2.9/5)
    Spin Master

    Worst Christmas present ever

    Worst Christmas present ever. I now have a son who wonders why Santa would give him a non-working gift. Doesn't run on walls or ceilings. Doesn't run on floors. The idea is it creates a small vacuum to suction the car to the wall/ceiling. The vacuum motor is very loud, the motor driving the wheels is also very loud. Unfortunately, the plastic case/body surrounding the motor is so poorly designed and attached to the motor, that its plastic hangs down too far and keeps the (two - this has only two) wheels from making contact with the ground. The skirt that is designed to help achieve a vacuum further interferes with the wheels. We have smooth floors and fairly smooth walls and ceiling. The car we got wouldn't adhere to the walls and wouldn't move on the ground. I've bought several airhog helicopters in the past, and so I had confidence in this product before I purchased it. My confidence was misplaced: This product does not perform as advertised, my... 1/5 Liz Larkin - See all my reviews This review is from: Air Hogs RC - Zero Gravity Laser Racer - Blue (Toy) Worst Christmas present ever. I now have a son who wonders why Santa would give him a non-working gift. Doesn't run on walls or ceilings. Doesn't run on floors. The idea is it creates a small vacuum to suction the car to the wall/ceiling. The vacuum motor is very loud, the motor driving the wheels is also very loud. Unfortunately, the plastic case/body surrounding the motor is so poorly designed and attached to the motor, that its plastic hangs down too far and keeps the (two - this has only two) wheels from making contact with the ground. The skirt that is designed to help achieve a vacuum further interferes with the wheels. We have smooth floors and fairly smooth walls and ceiling. The car we got wouldn't adhere to the walls and wouldn't move on the ground. I've bought several airhog helicopters in the past, and so I had confidence in this product before I purchased it. My confidence was misplaced: This product does not perform as advertised, my... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 25, 2014

    ... Gravity car as a promotion through BuzzAgent and was super excited when I got my package

    I received the Air Hog Zero Gravity car as a promotion through BuzzAgent and was super excited when I got my package. I love the Air Hog brand in general (we have several of their helicopters..so this remote control car was finally mine to play with!) was confidant that this product would not disappoint.So first the pros:*It is well constructed as with all of the Air Hog line. The car is a light weight foam material as others have mentioned, but it needs to be that way to climb walls and drive on the ceiling.*The controller is very easy and comfortable to hold. One button to shine the light for the car to follow. Can't get much easier than that! (Would be very easy for a small kiddo to use.)*I like that the charging cord has a closeable compartment. No wired to get in the way!*The driving on walls is awesome! It works best in this mode. I was zooming my car up and down the hallway to the jealousy of my sons and hubby...heehee. Occasionally it would get... 4/5 amy - See all my reviews This review is from: Air Hogs RC - Zero Gravity Laser Racer - Blue (Toy) I received the Air Hog Zero Gravity car as a promotion through BuzzAgent and was super excited when I got my package. I love the Air Hog brand in general (we have several of their helicopters..so this remote control car was finally mine to play with!) was confidant that this product would not disappoint.So first the pros:*It is well constructed as with all of the Air Hog line. The car is a light weight foam material as others have mentioned, but it needs to be that way to climb walls and drive on the ceiling.*The controller is very easy and comfortable to hold. One button to shine the light for the car to follow. Can't get much easier than that! (Would be very easy for a small kiddo to use.)*I like that the charging cord has a closeable compartment. No wired to get in the way!*The driving on walls is awesome! It works best in this mode. I was zooming my car up and down the hallway to the jealousy of my sons and hubby...heehee. Occasionally it would get... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , September 12, 2014

    Its ok...

    0 3/5 u.mmemmmimmru - See all my reviews This review is from: Air Hogs RC - Zero Gravity Laser Racer - Blue (Toy) Liked how simple it was to remove from packaging, anyone with kids can relate that some toys are almost impossible to remove. My kids loved how the car lights up. Tried running the car on the carpet, doesn't work. Ran the car in the garage since the floor is smooth and it picked up any small piece of grass etc which would cause the car to stop moving. I found the best place to run the car is on hardwood floors or on tile. Had a hard time running the car on walls and my ceiling has popcorn on it and it would not run at all on the ceiling. This remote control car would be perfect for little toddlers or little kids since the car follows a laser beam that is on the floor. The remote control takes 6 AA batteries which I found to be quite a lot. Overall its a fun toy but nothing I was super impressed with. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , September 12, 2014
    List Price: $39.99
    Includes: 1 Air Hogs Zero Gravity Laser Racer, 1 IR Controller/Charger, 1 User Instruction Guide
    The built-in infrared sensors chase the remote controls laser beam in any direction you point it.
    Defy the laws of gravity with patented Wall Climbing Technology. Drive along the floor, up the wall or even upside down!
    The Air Hogs Zero Gravity Laser Racer is built for drivers ages 8+ and requires 6 AA batteries for operation.
    It's fun, and easy to control. You have to see it to believe it!


  • Spin Master

    Air Hogs RC - Zero Gravity Laser Racer - Red

    Toy (Spin Master)
    List Price: $39.99

    The built-in infrared sensors chase the remote controls laser beam in any direction you point it.
    The Air Hogs Zero Gravity Laser Racer is built for drivers ages 8+ and requires 6 AA batteries for operation.
    Includes: 1 Air Hogs Zero Gravity Laser Racer, 1 IR Controller/Charger, 1 User Instruction Guide
    It's fun, and easy to control. You have to see it to believe it!
    Defy the laws of gravity with patented Wall Climbing Technology. Drive along the floor, up the wall or even upside down!


  • AEI Holding

    Propel - Air Combat Laser Battling Motion Controlled Helicopter - Green

    Toy (AEI Holding)
    List Price: $129.00
    Price: $85.95
    You Save: $43.05 (33%)

    Requires 4 AAA batteries
    Controller work for both Left or Right handed individuals
    Realistic Flight-Stick Motion Control
    Shift between two Speed Modes


  • Fascinations

    Fascinations Metal Earth 3D Laser Cut Model - Boeing AH-64 Apache Helicopter

    Toy (Fascinations)

    Rating (3 reviews):
    (5.0/5)
    Fascinations

    A great but challenging build. AND - The main rotor can spin!

    0 5/5 Christopher Williams (USA) - See all my reviews, March 10, 2015

    Five Stars

    0 5/5 J. Lai "JL" ("Silicone" Valley) - See all my reviews Verified Purchase(What's this?) This review is from: Fascinations Metal Earth 3D Laser Cut Model - Boeing AH-64 Apache Helicopter (Toy) This provides a couple of hours of fun for my hubby 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 13, 2015

    Five Stars

    0 5/5 Mitch - See all my reviews Verified Purchase(What's this?) This review is from: Fascinations Metal Earth 3D Laser Cut Model - Boeing AH-64 Apache Helicopter (Toy) not to bad to build 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 7, 2015
    List Price: $29.50
    Price: $9.90
    You Save: $19.60 (66%)
    Easy-to-read instructions
    Laser Cut Museum Quality Replica
    Made by Metal Earth
    Steel Model Kit


  • JADA

    Battle Machines Remote Control Laser Combat Helicopter - Channel A - Gray

    Toy (JADA)


  • Jada Toys

    Jada Toys Battle Machines - Laser Combat Air Vs. Land

    Toy (Jada Toys)

    Rating (15 reviews):
    (4.0/5)
    Jada Toys

    Solid, reliable (so far) and great fun.

    The initial out-of-box experience is not totally positive on this toy. In fact, it's downright frustrating, as your child (and you) try to learn how to control the helicopter and get it flying and turning the way you want it. But in a day or two, your 9-year old will be in complete control and able to maneuver down the hall or around the room, and you will be trying to shoot him down from the base station guns. To actually have the helicopter and the base-station gun shoot each other is another challenge entirely.In a few days, we've banged the helicopter into just about anything you can imagine and it doesn't do any serious damage, nor does it receive any.One thing: 11 AA batteries... WOW! Be prepared for that. Also, it's rather annoying that you have to put 3 in one of the devices. I like to use re-chargeables, and don't normally keep sets of 3 of those around. Minor annoyance. After 3 days of intense playing, the first set of Energizers we put in are still... 4/5 P. Hamm "p-squared" (Maineville, OH) - See all my reviews, November 11, 2011

    My 7 yr old grandson loves it!

    0 5/5 H. N. Gibson (Los Angeles, CA USA) - See all my reviews, December 5, 2011

    Fantastic; wonderful improvement over previous helicopter toys

    While this toy is really fun, that's not at all what amazes me about it. The real achievement here is the stability, ease of use, and durability of the helicopter itself. For a toy that is used (intensively) by our 11 and 6 year-old kids that is really crucial. I couldn't be more impressed and pleased with this set and won't be going back to AirHogz-style helicopters again.We have gone through several other RC helicopters over the last year or two and they have all had the same problems up to now:(1) they have been unstable and difficult to fly (touchy throttles, tough to trim, easily disrupted by slight air currents);(2) they have been fragile (doesn't take many crashes before rotors break or gears fail);(3) the combination of 1 and 2 make playing with them more frustrating than enjoyable above relegate them to the pile of misfit toys in a hurry.The Jada Battle Machines Air vs. Land set corrects all of these issues. Our 6 year-old is the... 5/5 Brian Warren (SLC, UT USA) - See all my reviews = Durability:, December 28, 2011
    List Price: $59.99
    Price: $58.90
    You Save: $1.09 (2%)
    Gun Turret features 360 degree rotation and reciprocating cannons
    Attack Helicopter features 3 channel, gyro stabilization for precise maneuverability
    Exploding sound effects when hits are taken and light patterns indicate shield level
    Infra-red laser combat between gun turret and attack helicopter


  • World Tech Toys

    Nano Battle Hercules Laser Tag 3.5CH IR RC Heli 2-Pack

    Toy (World Tech Toys)
    List Price: $99.99
    Price: $59.95
    You Save: $40.04 (40%)

    Strong Body Construction
    3.5 Channel Transmitter
    IR Laser Combat System
    LED Lights and Sounds
    Coaxial Rotor & Single Rear Rotor


  • Etoysworld

    Infra-red Laser Battle Tank Set (2 Pcs Included)

    Toy (Etoysworld)

    Rating (162 reviews):
    (3.9/5)
    Etoysworld

    Great Fun

    0 5/5 J. Newman "BUBBA" (ALA. USA) - See all my reviews, November 5, 2009

    Addictive toy !

    0 5/5 Moltike - See all my reviews = Durability:, June 5, 2011

    Bigger than expected

    0 5/5 TheBBunch06 (Dallas TX) - See all my reviews = Durability:, August 12, 2011
    Shoots infrared beams up to 25 meters
    Pre-Painted Camouflage Body
    Turret has 300 degree horizontal turning
    Turrent has 30 degree vertical lift for precise aiming
    Infrared turrets


  • Relaxus Products LTD.

    Cobra Air Raptor Remote Control Fighting Helicopters

    Hobby (Relaxus Products LTD.)
    List Price: $109.99
    Price: $89.00
    You Save: $20.99 (19%)

    Includes USB charger
    Helicopter based game of tag, with hit indicator lights and rotor adjustment
    3.5 channel Mini Remote Control Helicopters with Gyro and Rotor Jam protection


  • Fascinations

    Metal Works San Francisco Golden Gate Bridge 3D Laser Cut Models

    Toy (Fascinations)

    Rating (55 reviews):
    (3.8/5)
    Fascinations

    Good model. Heavy for beginner

    Previously, I wrote about and said that was the hardest model so far. Well, I think this one was the hardest, because of the flag and small parts on the roof. But, as always, I liked the design and quality of material. I just would not recommend it for beginner.This is fifth model I bought from Metal Works so far! The first one was , the second is and the third one... 4/5 Oleg Gaponov "Drap was here..." (Seattle, WA) - See all my reviews, December 1, 2012

    Flimsy...but maybe that's part of the fun

    0 4/5 Adam (San Francisco, CA) - See all my reviews This review is from: Metal Works San Francisco Golden Gate Bridge 3D Laser Cut Models (Toy) I often prefer a puzzle or craft that I find challenging. I purchased this from a local hobby shop and while I found it to be challenging, I believe the challenge comes due to the low quality construction.Removing each piece from the metal sheet is a challenge in itself. Some pieces were bending when I removed them, so much that they I was unable to reasonably get them back into their original shape. Then putting the pieces together and having them fit proved to be simply frustrating. Even with thin pliers I was unable to properly join most of the pieces.I would have happily paid a few more dollars for something more sturdy and slightly easier to assemble. I will not be purchasing from this manufacturer again. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , March 9, 2013

    "Charlie don't surf!"

    0 4/5 Gerard Dreiss "Gojulas" (Boston, MA) - See all my reviews, July 1, 2014
    Package dimensions: 6 1/2" x 4 3/4" (Approximate)
    Model is approximately 3"
    Includes instruction sheet
    # Easy to assemble
    Ages 14+


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