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Quad-Rotor RC helicopter design

BRAND NEW! The Lil’ Draganflyer Mini Quadrotor is a great beginner RTF Helicopter.

Lil' Draganflyer Quadrotor RC Helicopter

The Lil’ Draganflyer Mini Quadrotor is an ideal beginner 4-channel Ready-to-Fly 2.4GHz electric helicopter. Use it indoors or outdoors for unlimited fun. The Lil’ Draganflyer has flight characteristics similar to its bigger brothers, the Draganflyer X4, X4-P, X6, and X8. With three gyros, the Lil’ Draganflyer offers unsurpassed stability and incredible control. The 2.4GHz digital proportional 4-channel remote control ensures strong, glitch-free performance. Because of its small size, the Lil’ Draganflyer is easy to fly indoors, but it is also powerful enough to fly outdoors even with mild winds.

The Lil’ Draganflyer comes 100% assembled and Ready-to-Fly right out of the box with no assembly required.

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Posted in Electric RC Helicopters - Quad Rotor - Draganflyers, Learn to Fly RC Helicopters, Quad-Rotor RC Helicopter Design, RC Helicopter Controls, Throttle, Yaw, Pitch, Roll, RC Helicopter Flight Training, RC Helicopter Training Gear, RC Helicopters Using Electric Power

RC Helicopter Quad Copter Propellers Tested – Huge Amount of Data, Free for Download

There is a spreadsheet available with test data from over 251 unique propellers frequently used on RC helicopters and RC quad copters. Dr Phil Millener, Chattanooga, Tennessee (RCGroups.com user “Dr Kiwi”) made a spreadsheet of test data from lots of commonly used RC airplane and quad copter propellers, and gave us permission to make the file available to you for download. For your convenience, there is also a reformatted version which only contains the results without any macros (available in .xls format and .csv format.)

This spreadsheet has over 13000 data points for different propellers. Each row contains the following information:

  • Propeller Name
  • Motor Used
  • Gear
  • Propeller Diameter
  • Propeller Pitch
  • Amps, Volts and Watts drawn
  • RPM
  • RPM as % of Kv * V
  • Motor Weight
  • Motor and Gearbox weight
  • Thrust (in g and oz)
  • Grams per Watt
  • Pitch Speed

From this data, you can make a more educated choice on which propeller is best for your application. Looking at figures such as the number of grams per watt obtained can help you choose between similar propellers by giving you an estimate of which ones are more efficient in different situations. Depending on if you’re building a quad copter for hovering and aerial photography, or a high performance RC airplane, you can now get an objective picture of the differences between the propellers.

Because simulating how propellers perform in the real world is difficult, testing is necessary to measure their true performance. Before now, finding a unified source of data for many different propellers was difficult.

Here’s some example data, taken for an APC 8×6 E Thin Electric Propeller with a Hacker A20-22L  brushless motor:

Volts Amps Watts RPM Thrust (g) g/W
10.9 13.55 148 8650 567 3.83
9.9 11.7 116 8100 484 4.17
8.9 9.85 88 7440 406 4.61
7.9 8.2 65 6780 333 5.12
6.9 6.65 46 6120 267 5.80

If you wanted to know how this propeller performs with this motor as RPM is increased, you could make a plot like this in any spreadsheet program.

Adding a trendline to the data allows you to make a prediction about the thrust this propeller and motor would provide at other RPM values. A simple polynomial fits the measured data well.

Another quantity you might be interested in is the efficiency of the propeller and motor in grams of thrust produced per watt of power used. Here is one such plot.

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Posted in Latest RC Helicopter News, Quad-Rotor RC Helicopter Design

New Draganfyer X4 RC Helicopter Videos

Draganfly Innovations released their new Draganflyer X4 earlier this summer. The Draganflyer X4 RC Helicopter is an ultra portable aerial video and aerial photography platform. As seen in these videos:

Draganflyer X4 RC Helicopter Man Portable

This video depicts the Draganflyer X4 RC Helicopter being quickly set up and flown from its case which has an optional detectable back pack harness.




Draganflyer X4 RC Helicopter Soft Pack with Optional Back Pack Harness

In this video we see the Draganflyer X4 being transported in its soft pack with back pack harness on a man riding a mountain bike. This truly shows has easy it is to pack the Draganflyer X4 into a remote location.




Draganflyer X4 RC Helicopter with Panasonic FX-580 12.1 Mega Pixel Digital Camera

One of the camera payloads the Draganflyer X4 RC Helicopter can carry is the Panasonic FX-580 12.1 Mega Pixel Digital Still camera. This video gives a good description of how this camera integrates with in the Draganflyer X4 System.




Draganflyer X4 RC Helicopter Portable Live Streaming Video

This video gives us a picture in picture of what the camera sees as the rc helicopter is flying. The video is transmitted live while recording to the on board digital video camera.




Draganflyer X4 RC Helicopter – Micro Camera and Digital Video Recorder Payload

Another camera payload option for the Draganflyer X4 is a micro video board camera with a on board digital video recorder. This video gives you the details of the Micro Video board camera.




 
 

The Draganflyer X4 RC Helicopter, as demonstrated by these videos, is a very versitile and portable UAV aerial video and aerial photography platform. We here at RCHelicopter.com will be looking for new videos from Draganfly Innovations.

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Posted in Latest RC Helicopter News, Quad-Rotor RC Helicopter Design, RC Helicopter Commercial Aerial Photography Application, RC Helicopter Commercial Aerial Videography Application, RC Helicopter Commercial Inspection Application, RC Helicopter Military and Police Application, RC Helicopter Unmanned Drones and UAVs

Draganflyer RC Helicopters in VECPAV Autonomous Control System At Vanderbilt University, NV, USA

Using the Draganflyer electric remote control helicopter (manufactured by Draganfly Innovations Inc) Vanderbilt University has developed the Vanderbilt Embedded Computing Platform for Autonomous Vehicles (VECPAV). This system is able to control an aerial or ground vehicle autonomously (without a pilot).

Saskatoon, Saskatchewan (PRWEB) November 20, 2007 — Vanderbilt University in Nashville, TN has successfully used the Draganflyer electric rc helicopter for autonomous vehicle research, involving flight by computer control without human input. The project is called VECPAV (Vanderbilt Embedded Computing Platform for Autonomous Vehicles). VECPAV is intended to create and develop autonomous control systems for unmanned aerial and ground vehicles. These control systems eliminate the need for an operator by substituting intelligent control software and electronics. This research is part of a larger project aimed at improving the design of hybrid systems which use embedded electronics and software to control mechanical devices used in performance-critical and safety-critical applications.

Prof. T. John Koo, VECPAV Project, Draganflyer

Vanderbilt University in Nashville, TN has successfully used the Draganflyer electric rc helicopter for autonomous vehicle research, involving flight by computer control without human input. The project is called VECPAV (Vanderbilt Embedded Computing Platform for Autonomous Vehicles). VECPAV is intended to create and develop autonomous control systems for unmanned aerial and ground vehicles. These control systems eliminate the need for an operator by substituting intelligent control software and electronics. This research is part of a larger project aimed at improving the design of hybrid systems which use embedded electronics and software to control mechanical devices used in performance-critical and safety-critical applications.

Prof. T. John Koo, VECPAV Project, Draganflyer

Having autonomous control over a vehicle creates many benefits and removes the need for continuous human input. This could be applied to full size vehicles, allowing cars to drive themselves, or allowing automated vehicles to perform tasks in hazardous conditions. This would eliminate the risks normally faced by an on-board operator. By removing the operator and related systems from the vehicle, it also allows for increased payloads, smaller sizes, and increased mobility.

VECPAV Project Configuration

The VECPAV system uses a sensor tracker to monitor the motion and position of a Draganflyer rc helicopter by using identifier points on the helicopter. The system then analyzes this data and sends commands back to the Draganflyer rc helicopter through a radio control transmitter, telling the Draganflyer rc helicopter to maintain position or move through its flight plan. Videos of Draganflyer helicopters flying autonomously can be found on the VECPAV homepage, and This YouTube Video. In addition to being successfully used to control Draganflyer electric rc helicopters, the VECPAV system has also been implemented on ground based scale model vehicles.


As a result of his efforts on the VECPAV project, team leader Prof. T. John Koo has been recognized with an NSF (National Science Foundation) CAREER Award: Computation Platform for the Design of Hybrid Systems. This award is considered a highly prestigious honor. Prof. T. John Koo is now at Shantou University, China, where he plans to build on and extend what he has achieved at Vanderbilt.

The Draganflyer radio control rc helicopter has also been used in similar projects such as the MIT Aerospace Controls Laboratory’s UAV SWARM Health Management Project and the Stanford Testbed of Autonomous Rotorcraft for Multi-Agent Control. The Draganflyer rc helicopter is well suited for these applications because it is a stable aerial platform with fewer moving parts than a standard rc helicopter. The Quad-Rotor Draganflyer rc helicopter manoeuvres by varying the thrust generated from each of its four rotors. With one rotor at each corner, differential thrust causes the airframe to rotate and change direction. This eliminates the need for the linkages and components used on conventional rc helicopters that vary the pitch of the main rotor blades in order to manoeuvre. With fewer moving parts, there are fewer things to wear out, and less maintenance required. Because it is an electric rc helicopter, the Draganflyer is safe to use indoors. Its small size allows it to be used in smaller areas than conventional rc helicopters. The Draganflyer rc helicopter is manufactured and sold by Draganfly Innovations.

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Posted in Electric RC Helicopters - Coaxial Helis, Latest RC Helicopter News, Quad-Rotor RC Helicopter Design, RC Helicopter Unmanned Drones and UAVs

RC Helicopters With Quad-Rotor or Multi-Rotor Design

It is possible for an RC helicopter to use more that two main rotor blades. With four evenly spaced rotors (quad-rotor) the thrust from all the RC helicopter’s rotors is combined to generate lift, and the thrust produced by each individual rotor can be varied to allow the RC heli to maneuver.

Quad Rotor Helicopter Design

Decreasing thrust on rotors at or near the front will cause the RC helicopter’s nose to drop. This results in a forward tilt and forward motion. The same method can be applied to the rotors on the back or side, allowing the RC helicopter to move backward and side to side. Draganflyer RC Helicopters use quad-rotor design.

More information can be found in Wikipedia’s quad-rotor helicopter article.

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Posted in Quad-Rotor RC Helicopter Design

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