Speed Fixed

Speed Fixed ITEMS SHOWN INCLUDE THOSE AVAILABLE ON EBAY:

64904 Fixed Speed Versatility Grinder PRICE is per EACH
64904 Fixed Speed Versatility Grinder PRICE is per EACH
$7,907.14
End Date: Saturday Oct-14-2017 1:33:49 PDT
Buy It Now for only: $7,907.14
NEW  IKA Ultra TURRAX T65 Basic Disperser 7200rpm Fixed Speed 2 50L 4023501
NEW IKA Ultra TURRAX T65 Basic Disperser 7200rpm Fixed Speed 2 50L 4023501
$6,962.80
End Date: Monday Oct-23-2017 8:56:30 PDT
Buy It Now for only: $6,962.80
Dynabrade 64905 Fixed Speed Vers Grinder 15hp 230V 1 Phase 50 60 Hz 5400 SFPM
Dynabrade 64905 Fixed Speed Vers Grinder 15hp 230V 1 Phase 50 60 Hz 5400 SFPM
$4,922.70
End Date: Monday Oct-16-2017 8:11:38 PDT
Buy It Now for only: $4,922.70
Dynabrade 64904 Fixed Speed Vers Grinder 15hp 150V 1 Phase 50 60 Hz 5400 SFPM
Dynabrade 64904 Fixed Speed Vers Grinder 15hp 150V 1 Phase 50 60 Hz 5400 SFPM
$4,922.70
End Date: Monday Oct-16-2017 8:12:30 PDT
Buy It Now for only: $4,922.70
Dynabrade 64879 Three Wheel Versatility Belt Grinder 230 V 1 1 2 hp Fixed Speed
Dynabrade 64879 Three Wheel Versatility Belt Grinder 230 V 1 1 2 hp Fixed Speed
$4,481.32
End Date: Monday Oct-16-2017 8:31:47 PDT
Buy It Now for only: $4,481.32
Dynabrade 64878 Three Wheel Belt Grinder 1 1 2 hp 115 V Fixed Speed
Dynabrade 64878 Three Wheel Belt Grinder 1 1 2 hp 115 V Fixed Speed
$4,481.32
End Date: Monday Oct-16-2017 8:32:42 PDT
Buy It Now for only: $4,481.32
Low Speed Research Centrifuge MP 800 With Fixed Angle Rotor Head
Low Speed Research Centrifuge MP 800 With Fixed Angle Rotor Head
$3,523.99
End Date: Thursday Oct-5-2017 5:17:13 PDT
Buy It Now for only: $3,523.99
High Speed Research Centrifuge MP 400 With Fixed Angle Rotor Head CE SALE
High Speed Research Centrifuge MP 400 With Fixed Angle Rotor Head CE SALE
$3,060.00
End Date: Saturday Oct-21-2017 3:12:29 PDT
Buy It Now for only: $3,060.00
Zeiss Compact Prime CP2 85mm T15 Super Speed EF Mount MINT
Zeiss Compact Prime CP2 85mm T15 Super Speed EF Mount MINT
$2,800.00
End Date: Tuesday Sep-26-2017 22:39:06 PDT
Buy It Now for only: $4,000.00
Zeiss Compact Prime CP2 50mm T15 Super Speed EF Mount MINT
Zeiss Compact Prime CP2 50mm T15 Super Speed EF Mount MINT
$2,800.00
End Date: Tuesday Sep-26-2017 22:39:34 PDT
Buy It Now for only: $4,000.00
Low Speed Research Centrifuge TC 8100 F With Fixed Angle Rotor Head
Low Speed Research Centrifuge TC 8100 F With Fixed Angle Rotor Head
$2,617.99
End Date: Thursday Oct-5-2017 5:17:13 PDT
Buy It Now for only: $2,617.99
NEW Drucker 755 24 3150rpm Fixed Speed Horizontal Rotor Centrifuge 24 x 5 15ml
NEW Drucker 755 24 3150rpm Fixed Speed Horizontal Rotor Centrifuge 24 x 5 15ml
$2,415.54
End Date: Monday Oct-23-2017 9:07:25 PDT
Buy It Now for only: $2,415.54
Drucker 12x5 15ml Fixed Speed Horizontal Centrifuge 755 12
Drucker 12x5 15ml Fixed Speed Horizontal Centrifuge 755 12
$2,354.60
End Date: Monday Oct-23-2017 9:35:23 PDT
Buy It Now for only: $2,354.60
NEW Drucker 755 12 3150rpm Fixed Speed Horizontal Rotor Centrifuge 12 x 5 15ml
NEW Drucker 755 12 3150rpm Fixed Speed Horizontal Rotor Centrifuge 12 x 5 15ml
$2,354.54
End Date: Monday Oct-23-2017 8:58:53 PDT
Buy It Now for only: $2,354.54
NOVELLUS SRN2 02 255013 00 RF MATCH FIXED DOME SPEED S TRAZAR
NOVELLUS SRN2 02 255013 00 RF MATCH FIXED DOME SPEED S TRAZAR
$2,300.00
End Date: Friday Oct-6-2017 4:42:43 PDT
Buy It Now for only: $2,300.00
2017 CINELLI MASH WORK Fixed Gear Single Speed Custom Built MEDIUM 54 CM
2017 CINELLI MASH WORK Fixed Gear Single Speed Custom Built MEDIUM 54 CM
$2,150.00
End Date: Thursday Oct-19-2017 19:13:28 PDT
Buy It Now for only: $2,150.00
CinelliMASHHistogram Black Blue White Track Fix Fixie Fixed Gear Single Speed
CinelliMASHHistogram Black Blue White Track Fix Fixie Fixed Gear Single Speed
$2,099.99
End Date: Saturday Sep-30-2017 18:38:52 PDT
Buy It Now for only: $2,099.99
Eberbach E6010 Benchtop Fixed Speed Reciprocal Shaker 115V
Eberbach E6010 Benchtop Fixed Speed Reciprocal Shaker 115V
$1,996.40
End Date: Thursday Oct-12-2017 5:58:21 PDT
Buy It Now for only: $1,996.40
Eltek High Speed Research Centrifuge TC 4100 F With Fixed Angle Rotor Head
Eltek High Speed Research Centrifuge TC 4100 F With Fixed Angle Rotor Head
$1,917.99
End Date: Thursday Oct-5-2017 5:17:14 PDT
Buy It Now for only: $1,917.99
NOS Limited Edition Eddy Merckx UMX S Singlespeed fixie fixed gear brand new 53
NOS Limited Edition Eddy Merckx UMX S Singlespeed fixie fixed gear brand new 53
$1,784.58
End Date: Thursday Sep-28-2017 13:11:08 PDT
Buy It Now for only: $1,784.58
NEW Drucker 653ES 3150rpm Fixed Speed Horizontal Rotor Centrifuge 12 x 5 10ml
NEW Drucker 653ES 3150rpm Fixed Speed Horizontal Rotor Centrifuge 12 x 5 10ml
$1,662.80
End Date: Monday Oct-23-2017 8:58:52 PDT
Buy It Now for only: $1,662.80
BLUE LEHIGH CARBON 51cm 700c Track Fixed Gear Single Speed Bike NEW
BLUE LEHIGH CARBON 51cm 700c Track Fixed Gear Single Speed Bike NEW
$1,599.97
End Date: Monday Sep-25-2017 18:57:58 PDT
BLUE LEHIGH CARBON 53cm 700c Track Fixed Gear Single Speed Bike NEW
BLUE LEHIGH CARBON 53cm 700c Track Fixed Gear Single Speed Bike NEW
$1,599.97
End Date: Friday Sep-29-2017 18:30:28 PDT
BLUE LEHIGH CARBON 700c Track Fixed Gear Single Speed Bike NEW
BLUE LEHIGH CARBON 700c Track Fixed Gear Single Speed Bike NEW
$1,638.72
End Date: Tuesday Oct-17-2017 9:07:05 PDT
Buy It Now for only: $1,638.72
NEW  IKA A11 Basic Analytical Mill 28000rpm Fixed Speed 80ml Max 2900001
NEW IKA A11 Basic Analytical Mill 28000rpm Fixed Speed 80ml Max 2900001
$1,579.54
End Date: Monday Oct-23-2017 9:04:26 PDT
Buy It Now for only: $1,579.54
BD Adams Compact II 6x Fixed Speed Centrifuge 3200 RPM
BD Adams Compact II 6x Fixed Speed Centrifuge 3200 RPM
$1,502.02
End Date: Monday Oct-23-2017 9:49:39 PDT
Buy It Now for only: $1,502.02
BLUE LEHIGH CARBON 57cm 700c Track Fixed Gear Single Speed Bike NEW
BLUE LEHIGH CARBON 57cm 700c Track Fixed Gear Single Speed Bike NEW
$1,399.97
End Date: Monday Sep-25-2017 19:10:42 PDT
Globe Food SP8 Electric No Suggestions 8 Qt Gear Driven Mixer w 3 Fixed Speeds
Globe Food SP8 Electric No Suggestions 8 Qt Gear Driven Mixer w 3 Fixed Speeds
$1,382.67
End Date: Monday Oct-2-2017 22:16:15 PDT
Buy It Now for only: $1,382.67
Bici scatto fisso fixed Saccarelli pista alluminio carbonio single speed bike
Bici scatto fisso fixed Saccarelli pista alluminio carbonio single speed bike
$1,195.70
End Date: Monday Oct-23-2017 8:32:59 PDT
Buy It Now for only: $1,195.70
Giant Bowery 84 Fixed or single speed sz medium spinergy wtb
Giant Bowery 84 Fixed or single speed sz medium spinergy wtb
$1,300.00
End Date: Wednesday Oct-11-2017 18:53:26 PDT
Buy It Now for only: $1,300.00
022654080 high speed aerosol tight ptfe coated fixed angle rotor fa 45 24 11 hs
022654080 high speed aerosol tight ptfe coated fixed angle rotor fa 45 24 11 hs
$1,244.50
End Date: Tuesday Sep-26-2017 13:38:12 PDT
Buy It Now for only: $1,244.50
700C White Blue Road Bike Single Speed Aluminum Frame Racing Bicycle Fixed Gear
700C White Blue Road Bike Single Speed Aluminum Frame Racing Bicycle Fixed Gear
$1,138.90
End Date: Monday Oct-16-2017 19:34:14 PDT
Buy It Now for only: $1,138.90
NEW MICHE Supertype SPX5 REAR Fixed Single Speed RRP 118499 Wheel Red Hook
NEW MICHE Supertype SPX5 REAR Fixed Single Speed RRP 118499 Wheel Red Hook
$1,149.91
End Date: Sunday Oct-15-2017 4:02:27 PDT
Buy It Now for only: $1,149.91
Cinelli MASH Histogram 57cm Track Fixie Fixed Gear Single Speed
Cinelli MASH Histogram 57cm Track Fixie Fixed Gear Single Speed
$1,225.00
End Date: Tuesday Oct-24-2017 12:11:08 PDT
Buy It Now for only: $1,225.00
Bicycle Frame Hybrid Titanium Alloy Road Bike Fixed Gear Single Speed Frame 700C
Bicycle Frame Hybrid Titanium Alloy Road Bike Fixed Gear Single Speed Frame 700C
$1,224.68
End Date: Sunday Oct-1-2017 6:54:04 PDT
Buy It Now for only: $1,224.68
Bianchi Caurus 909 celeste fixed gear fixie single speed 57cm custom
Bianchi Caurus 909 celeste fixed gear fixie single speed 57cm custom
$1,148.57
End Date: Tuesday Oct-17-2017 23:19:06 PDT
Buy It Now for only: $1,148.57
BMC TR02 Track Machine Frame Fork Set New Single Speed Fixed Fixie
BMC TR02 Track Machine Frame Fork Set New Single Speed Fixed Fixie
$1,150.00
End Date: Monday Sep-25-2017 7:02:53 PDT
Buy It Now for only: $1,150.00
Eberbach 6015 Fixed Speed Reciprocal Shaker Belt Driven Needs New Belt
Eberbach 6015 Fixed Speed Reciprocal Shaker Belt Driven Needs New Belt
$1,200.00
End Date: Tuesday Oct-24-2017 13:24:49 PDT
Buy It Now for only: $1,200.00
campagnolo bora ultra pista Bahn track Version custom made fixedgear singlespeed
campagnolo bora ultra pista Bahn track Version custom made fixedgear singlespeed
$1,090.38
End Date: Saturday Sep-30-2017 4:15:49 PDT
Buy It Now for only: $1,090.38
Aluminum Frame Road Bike Racing Bicycle 700C Single Speed Fixed Gear White Blue
Aluminum Frame Road Bike Racing Bicycle 700C Single Speed Fixed Gear White Blue
$1,138.90
End Date: Friday Sep-29-2017 20:37:26 PDT
Buy It Now for only: $1,138.90
Soma Fixed Gear Single Speed Bike 51 cm
Soma Fixed Gear Single Speed Bike 51 cm
$1,050.00
End Date: Monday Oct-23-2017 17:26:06 PDT
Buy It Now for only: $1,050.00
Eberbach Heavy Duty Fixed Speed Reciprocal Shaker
Eberbach Heavy Duty Fixed Speed Reciprocal Shaker
$999.00
End Date: Sunday Oct-15-2017 6:14:04 PDT
Buy It Now for only: $999.00
Legnano green single speed fixed gear fixie 57 leather bike campagnolo
Legnano green single speed fixed gear fixie 57 leather bike campagnolo
$1,013.28
End Date: Friday Oct-20-2017 0:17:17 PDT
Buy It Now for only: $1,013.28
Cooper Pista SPA T100 Chrome Single Speed Fixed Gear Track Bike
Cooper Pista SPA T100 Chrome Single Speed Fixed Gear Track Bike
$1,000.00
End Date: Saturday Oct-7-2017 8:04:07 PDT
Buy It Now for only: $1,000.00
Rivendell Quickbeam 66 cm Single Speed Fixed
Rivendell Quickbeam 66 cm Single Speed Fixed
$1,000.00 (1 Bid)
End Date: Monday Sep-25-2017 19:06:06 PDT
Globe Food SP8 Electric 8 Qt Gear Driven Mixer w 3 Fixed Speeds
Globe Food SP8 Electric 8 Qt Gear Driven Mixer w 3 Fixed Speeds
$1,036.00
End Date: Monday Oct-23-2017 8:45:30 PDT
Buy It Now for only: $1,036.00
NEW  Benchmark Scientific 38rpm Fixed Speed Tube Roller w 10 Rollers R3010
NEW Benchmark Scientific 38rpm Fixed Speed Tube Roller w 10 Rollers R3010
$1,015.80
End Date: Monday Oct-23-2017 8:58:56 PDT
Buy It Now for only: $1,015.80
Drucker 6x5 10ml Horizontal Centrifuge 3400rpm Fixed Speed 1600xg 642E
Drucker 6x5 10ml Horizontal Centrifuge 3400rpm Fixed Speed 1600xg 642E
$1,006.44
End Date: Monday Oct-23-2017 9:08:11 PDT
Buy It Now for only: $1,006.44
Premium Brew 54cm Lugged seamless double butted CroMo Single Speed or Fixed NOS
Premium Brew 54cm Lugged seamless double butted CroMo Single Speed or Fixed NOS
$999.00
End Date: Thursday Oct-19-2017 5:06:39 PDT
Buy It Now for only: $999.00
NEW  IKA Rocker 3D Basic Shaker 2kg Max Capacity 30rpm Fixed Speed 4000000
NEW IKA Rocker 3D Basic Shaker 2kg Max Capacity 30rpm Fixed Speed 4000000
$938.83
End Date: Monday Oct-23-2017 9:49:40 PDT
Buy It Now for only: $938.83

« Previous12

Speed+Fixed

ELECTRONIC SPEED CONTROLLER by Alain.Nguyen

â€We probably underestimate just how beneficial ESC technology†ESCs are at the core of the technology that makes hybrid cars a realityâ€. (Koral and Jonathan Feldkamp, 2009)
WHAT IT IS
An electronic speed controller or ESC is an electronic circuit which is used to take DC power from a battery and distribute to an electric motor. In order to do that, it is connected to a servo channel on the receiver and, rather than controlling the position of a servo, allows the signal from the receiver to control the speed and torque of the connected electric motor.
There are two types of electronic speed controller for the two different types of motor in common use:
â€Brushed motor: the speed is controlled simply by restricting the amount of power delivered to the motor. The easiest way for the speed controller to do this is to supply the power is short pulses, many times a second. The longer the pulses, the more power, and the faster the motor turns. Brushed motors connect to the speed controller via two wires; to reverse the direction of the motor, the wires are swapped.
â€Brushless motor: power is controlled in the same way, but the speed controller must electronically select between the multiple sets of windings in the motor to make it turn. Most modern brushless speed controllers are known as sensorless controllers and make use of the voltage generated (Back EMF) in the momentarily unpowered windings to determine the position of the motor. Virtually all brushless motors and controllers used in model helicopters have three wires; to reverse the direction of the motor, swap the connections of any two wires.
In brief, the changes are more than a lack of â€brushes†to distribute power; the motors are built in a whole new way and with the ESC that would power them the power, efficiency and speed far surpassed previous brushed systems.
HOW IT WORKS
TRADITIONAL ESC
Early electric speed controls consisted of nothing more than a hefty variable resistor, the wiper of which was moved by a servo. This had the advantage of being simple, but was very inefficient at partial throttle settings. Such a control works by reducing the voltage to the motor, but this means that any voltage that does not appear across the motor terminals must appear across the speed control. For example, at half throttle, a resistor speed control that is controlling a motor drawing 10A from a 6-cell pack will have 3.6V across it, and 10A flowing through it. From our second law, that's 36W, which all becomes useless heat. This would be like running a 40W light bulb in the radio compartment of your plane. Furthermore, half the power being produced by the battery is being wasted. A resistor speed control is only efficient at zero throttle (when no current is flowing), and at full throttle (when there is no voltage drop across the speed control).
Some early electronic speed controls used ordinary (bipolar) transistors to switch the motor current. These generally have a 0.7V drop, regardless of the current flowing through them. This means a power loss. For example, at 20A (full throttle on a small 05 sized sport plane), this would result in a 14W loss (P = I V = 20A 0.7V = 14W).
MODERN ESC
Modern speed controls use MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). Rather than having a fixed voltage drop like a bipolar transistor, a MOSFET has a fixed resistance when turned on. Therefore, the voltage drop depends on the current flow. A typical MOSFET used in inexpensive speed controls has 0.028 Ohms resistance. Using Ohm's law, we can determine the voltage loss. At 20A, this produces a 0.56V drop (V = I R = 20A 0.028 Ohms = 0.56V). We can use the second law to compute that the power loss would be 11.2W (P = I V = 20A 0.56V = 11.2W). The power loss can be reduced by using more MOSFETs in parallel, or using modern lower resistance MOSFETs. For instance, an Astro 211 speed control has a resistance of only 0.002 Ohms. At 20A, this would result in a 0.8W power loss. If it were being used with 10 cells at 20A, it would be less than a 0.4% loss (10 cells at 20A produces about 220W).
Theoretically, the speed control will be equally efficient at all throttle settings. (One could argue that it is more efficient at lower settings, because it spends more of its time in the 100% efficient off state.)
HOW TO CHOOSE IT
The general procedure of choosing the right ECS is to narrow the list down to ESCs that will get the job done, and then make your final selection based on price and preference. First, select ESCs based on their most fundamental features.
BRUSHED OR BRUSHLESS
R/C speed controllers are separated by the type of motor they work with, either brushed or brushless. If your motor has two wires, it is brushed, and you need a brushed speed control. If it has three wires, it is brushless motor, and you require a brushless speed control. An exception to these rules are ESCs that can work with both types of motor, however this feature is not commonly available. HeliDirect can be a good place to compare various brushless motors from different manufacturers.
CURRENT RATING
An ESC will have a power limit. To handle more power, the ESC needs to be larger, heavier, and is more expensive. It’s important to know the peak current your motor is going to pull at full throttle. This determines the current rating you should look for in an ESC. Always choose an ESC with a current rating that is higher than what you need. If the motor is going to pull 12A, a 25A-rated ESC is a much better choice than a 10A-rated one. The 10A ESC will probably overheat and cook, even if you only fly at half throttle. ESCs are relatively light and maintain great resale value, so this is one item in your power system where skimping isn’t worthwhile.
Choosing the correct type and identifying the minimum current rating are the two big steps. The next choices depend on your preferences. Here are some of the features and limits that can affect your selection.
VOLTAGE RATING
All ESCs have voltage limits. Some even have more than one! What is your battery voltage? Choose an ESC that is designed to work with an equal or higher voltage. Some ESCs are designed for low voltages (below 13V), some for medium voltages (below 25V), and some for high voltages (above 25V). You shouldn’t connect a high voltage battery to a low voltage ESC, but it is also wasteful to use a high voltage ESC with a low voltage battery. The second voltage rating that some ESCs have is based on their Battery Eliminator Circuit (BEC). For an ESC to provide power to your receiver and servos, it has to drop battery voltage down to 5V. This becomes difficult once battery voltage is above 13V, so usually a separate receiver battery or voltage regulator is required. Consider what is going to be powering your receiver and servos.
LOW VOLTAGE CUTOFF
To protect your lithium polymer battery pack from being discharged too much, most ESCs can shut down when they sense battery voltage has become too low. This is almost always a useful feature, as it can save your Li-poly battery from being permanently damaged.
PRICE
ESCs with the same current and voltage rating can vary in price. Investigate this large market, and put prices on the features that you want.
PROGRAMMABILITY
Some ESCs simply work out of the bag, like servos. Others can be fine-tuned and set up with exotic throttle profiles. The most advanced can be configured via a computer program and cable.

HeliDirect Your Source for R/C Helicopters Parts and Upgrades - Helidirect.com is your source for RC Helicopters Micro Helicopters such as the Ikarus Piccolo, MS-Composit Hornet, House Fly and all other Micro Radio control...
http://www.helidirect.com/helicopters-speed-controllers-c-1_45.hdx

Article Source: http://www.earticlesonline.com/Article/ELECTRONIC-SPEED-CONTROLLER/644882

'HALO' Speed Painting by Duks (FIXED AUDIO/ FREE HD WALLPAPER/ VIDEO DOWNLOAD)

The New OPERA faster-than-light Neutrino Test: Results! [Starts With A Bang] (scienceblogs)

> Q: "Why don't physicists shield themselves from neutrinos?"

A: "Because they never see them coming." #neutrinojokes

Over the past two months, we've talked more about neutrinos than ever before
thanks to an extraordinary claim that neutrinos have been observed to move
faster-than-light!

And as you well know, _no particle_ is allowed to travel through spacetime
faster than the speed of light in vacuum, no matter how much energy you put
into it!

(Unless, that is, you count what happens in video games.)

Here's a brief refresher for you as to what's been going on. CERN, the home of
the world's most powerful particle accelerator, has (as sort of a side-
project) been producing a beamline of high-energy protons, and firing them in
a very specific direction.

(Image credit: The OPERA collaboration's recent paper.)

What happens to these protons? They smash them into a "fixed target," and the
protons are moving at such high energies that they can produce all sorts of
extremely high energy, unstable particles!

More specifically, the vast majority of these particles wind up moving at
somewhere around 99.999% the speed of light, with a good number of them
decaying into muons and -- to be ...

scienceblogs

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