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Copyright Velocomp LLP 2008-2017

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CDA ANALYSIS

and use the “Tools/CdA Analysis…” command to view and analyze your CdA data:

A window like this will appear:

Here you can see your CdA vs time (or distance, by changing the top right menu item);
Time Advantage, and Speed. The parameters plotted can be selected in the window below
the graphs.

NOTE

: THE CdA and Time Advantage vs. time graph numbers in the graph correspond to

the numbers displayed on a Newton power screen

during your ride

.

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Содержание Newton CdA

Страница 1: ...Copyright Velocomp LLP 2008 2017 1 Newton PowerPod CdA Measurement Instruction Manual March 2017 Newton FW 5 15 PowerPod FW 6 21 Isaac software 4 1 ...

Страница 2: ...r Device to your computer and launch Isaac Then go to Device Unlock Feature then click the Get Unlock Status button If the key is installed on your PowerPod Newton it will be listed as CdA Function TT Key If you don t see CdA Function listed then you will have to purchase a CdA key for your Device FOR MORE INFORMATION ABOUT PURCHASING THE CdA KEY VISIT https velocomp llc myshopify com products new...

Страница 3: ...omp LLP 2008 2017 3 NOTE FOR BEST RESULTS WE STRONGLY RECOMMEND THAT YOU FAMILIARIZE YOURSELF WITH ISAAC INSTRUCTIONS BEFORE READING THIS MANUAL ISAAC INSTRUCTIONS ARE AVAILABLE THROUGH THE HELP MENU OF ISAAC SOFTWARE ...

Страница 4: ...s Time Advantage However accurate CdA measurements can happen only after proper setup and calibration of your PowerPod Newton and Direct Force Power Meter BEFORE STARTING CDA TESTING PLEASE READ AND CAREFULLY FOLLOW THE INSTRUCTIONS IN THIS MANUAL IMPORTANT Make sure you review the operating manual of your Direct Force Power Meter DFPM and make sure your DFPM is properly temperature acclimated and...

Страница 5: ...owerPod only 3 ANT or ANT BLE speed and cadence sensors 4 ANT or ANT BLE Direct Force Power Meter DFPM note due to potential accuracy issues one leg power meters such as Stages and 4iii are not recommended 5 Isaac software 4 1 or higher 6 Newton Firmware 5 15 or higher 7 PowerPod Firmware 6 21 or higher NOTE CdA aerodynamic measurements are tricky to make especially outdoors Please follow these in...

Страница 6: ... AND CALIBRATION Because of the sensitivity of CdA measurements you need to do the following with your DFPM 1 Pair your DFPM to your PowerPod Newton Device STEP 3 below 2 Prior to any CdA testing ride with your DFPM for at least 10 minutes to make sure it is acclimated to outdoor temperature 3 Before starting your CdA measurements confirm that your DFPM has been calibrated zeroed using the Calibra...

Страница 7: ...climb slowly from 1 to 50 The power number indicates the completion of the calibration ride i e 25W means the O B ride is 25 complete 11 Your bike speed during the O B ride is not important but DO NOT DRAFT BEHIND OTHER CYCLISTS OR CARS 12 After riding five minutes the end of the out portion half way complete 50 completion point of the ride the status light will change to solid red and watts will ...

Страница 8: ...Copyright Velocomp LLP 2008 2017 8 PowerPod Out and Back Ride ...

Страница 9: ...G YOUR CAL RIDE STAY IN YOUR NORMAL RIDE POSITION YOU USE MOST OFTEN FOR EXAMPLE HOODS POSITION ON YOUR ROAD BIKE OR TIME TRIAL POSITION ON YOUR TT BIKE 7 After 8 seconds of riding the Newton screen changes Cal appears in the middle window and Start flashes in the bottom window 8 If you want to keep riding and start your Cal Ride at a different place from your current location that s OK Just keep ...

Страница 10: ...the Out portion of your ride 16 The progress bar empties as you ride back Keep riding until the progress bar is completely empty and Cal Done flashes 17 Once the Cal Ride is completed your Newton returns to its normal screens and your Newton is calibrated NOTICE AFTER BEGINNING YOUR NEWTON CAL RIDE IF YOU WISH TO TERMINATE ABORT IT PRESS HOLD THE NEWTON S CENTER BUTTON FOR TWO SECONDS THIS ABORTS ...

Страница 11: ... during your out and back ride 1 Attach your Device PowerPod or Newton to Isaac 2 Click on the Download Ride Data button or use the Isaac command Device Download Ride Data A window like this will appear your ride file content will be different 3 Click the Show Download Window button A new window will appear your window will look different in its details 4 In the box to the far left of the Autoname...

Страница 12: ... IN CalRide ibr These files are your out and back cal rides Your most recent cal ride will be located closest to the bottom of the list Serotta_01_27_2017_0937_4km_CalRide ibr in the list above 7 Click on the cal ride you want to download your download will commence 8 After your download finishes a profile wizard will pop up allowing you to fine tune your settings in a series of windows As you cli...

Страница 13: ...re to click the Send to Newton a confirming message will be sent afterwards 10 Your cal ride data will now appear in the main window of Isaac 11 Now we will determine the normal value of CdA as measured during your Cal Ride Use the command Analyze Check Calibration ...

Страница 14: ...d determining the best fit CdA value between your DFPM data and PowerPod Newton data You will see Before and after values in the Calibration Changes table The CdA in the right column is your measured CdA 14 Click the Send Profile to iBike button to load your best fit profile into your PowerPod Newton You are now ready to start CdA measurements Measured CdAà ß measured CdA is on right ...

Страница 15: ...ow you to determine more precise CdA measurements POWERPOD Continuous CdA and Time Advantage measurements Using PowerPod you will perform your CdA tests in the field During your testing PowerPod records both your applied forces from the DFPM and your opposing forces from the PowerPod Both sets of data are recorded in the PowerPod ride file After the ride Isaac software provides detailed post ride ...

Страница 16: ...llow your PowerPod Newton and DFPM to acclimate NOTE FOR BEST RESULTS WE RECOMMEND YOU PERFORM AN O B CAL RIDE PRIOR TO EACH ROUND OF CDA TESTING 5 Now start your CdA testing hold the same riding position for about 10 minutes This allows lots of data to be gathered NEWTON ONLY you ll see CdA and Time Advantage data rotate on the bottom window of your power screen 6 After you ve gathered your CdA d...

Страница 17: ...e file We will illustrate CdA analysis features with an example Here is a file where the rider did loops of a shopping center mall perimeter He rode in three positions standing up normal hoods and tuck Each position was measured for two laps each 0 9 mile lap begins on a small hill This is the ride as downloaded at this point it s not possible to tell what the CdA test results are ...

Страница 18: ...TATION We will use Isaac to mark the testing sections and to annotate them 1 In the main window click on the location where testing begins A yellow vertical line appears in this case we click at around the 0 1 mile mark the beginning of the Standing section ...

Страница 19: ...e lap markers at every place where ride position was changed in this example at the beginning of the small hill every two circuits of the perimeter 4 Once the lap markers are placed click on the Lap tab to the left of the graphs Notice that if you select a lap section in the Lap tab the statistics for that section will be highlighted and the graph section will highlight in blue here we have highli...

Страница 20: ... 2008 2017 20 5 You can annotate your ride file with comments that describe test parameters for each section Use this command We annotate the first section as Standing place that annotation in the Power window then click OK ...

Страница 21: ...Copyright Velocomp LLP 2008 2017 21 The word Standing appears in the middle of the Power graph and we drag drop the word to the highlighted section ...

Страница 22: ...Copyright Velocomp LLP 2008 2017 22 6 We repeat the above steps so that all sections are marked as laps and annotated accordingly THEN WE SAVE MARKED ANNOTATED FILE SO THAT THE CHANGES ARE RECORDED ...

Страница 23: ...this will appear Here you can see your CdA vs time or distance by changing the top right menu item Time Advantage and Speed The parameters plotted can be selected in the window below the graphs NOTE THE CdA and Time Advantage vs time graph numbers in the graph correspond to the numbers displayed on a Newton power screen during your ride ...

Страница 24: ...d in each window For example if we wanted to compare CdA and Time Advantage to elevation we might shift the bottom scale to distance and bottom graph to elevation This graph can be used to help understand WHERE ride position is changed and WHEN to be extra careful about ride position ...

Страница 25: ...your normal ride position using your PowerPod or Newton During a long ride however you get tired and your ride position becomes a bit sloppy How much longer did it take you to complete your ride because your ride position became worse Time Advantage answers all these questions and more DEFINITION AT ANY POINT OF YOUR RIDE TIME ADVANTAGE IS THE CUMULATIVE AMOUNT OF TIME YOU HAVE GAINED OR LOST DUE ...

Страница 26: ...me Advantage Note that with PowerPod you cannot see Time Advantage statistics during your ride With PowerPod CdA and Time Advantage reports are available only after riding when you download your ride to Isaac Graphical Example Here is a graphical depiction of an actual PowerPod Newton ride with a DFPM using the Tools CdA Analysis feature of Isaac The top graph shows CdA versus distance The middle ...

Страница 27: ...et opposing wind speed is below 5 mph caused typically by tailwinds In this example the rider is just below the 15 mph threshold between miles 6 and 7 and there also appears to be a tailwind too causing wind speed to drop below 5 mph we can t tell this from the graph Time Advantage does NOT change between miles 6 and 8 because the Newton is operating below its minimum measurement threshold Just af...

Страница 28: ...peed is below 5 mph Time Advantage will not be changed on Newton e To reset Time Advantage to zero perform a Trip Reset 4 Ride files downloaded to Isaac will contain both PowerPod Newton and DFPM information Other important things to remember 1 Continuous CdA and Time Advantage measurements are accurate only when riding solo these measurements won t be accurate when riding in a pack 2 Continuous C...

Страница 29: ...alysis command to view and analyze your CdA data A window like this will appear Here you can see your CdA vs time or distance by changing the top right menu item Time Advantage and Speed The parameters plotted can be selected in the window below the graphs NOTE THE CdA and Time Advantage vs time graph numbers in the graph correspond to the numbers displayed on a Newton power screen during your rid...

Страница 30: ...d in each window For example if we wanted to compare CdA and Time Advantage to elevation we might shift the bottom scale to distance and bottom graph to elevation This graph can be used to help understand WHERE ride position is changed and WHEN to be extra careful about ride position ...

Страница 31: ...METER COMPARISON If you d like to see how your Device and your DFPM power measurements compare moment by moment select Tools Power Meter Comparison The following graph will appear Newton power is shown in white and DFPM power is shown in green ...

Страница 32: ... information VELOCOMP POWER METER FORUM There are tens of thousands of Velocomp power meter owners here s a great place to meet many of them to get your questions answered and to contribute your insights to others http www ibikeforum com TECHNICAL SUPPORT If you have questions that are addressed by the Help documents and links please email us at technicalsupport velocomp com We will get back to yo...

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