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Summary of Contents for velocomp Newton CdA
- Page 1 ® ® Newton /PowerPod Measurement Instruction Manual March 2017 Newton FW 5.15+ PowerPod FW 6.21+ Isaac software 4.1+ Copyright Velocomp LLP 2008-2017...
- Page 2 “CdA Function (TT Key)” CdA Key is installedà 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/newton-cda-wind-tunnel- upgrade-key Copyright Velocomp LLP 2008-2017...
- Page 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 Copyright Velocomp LLP 2008-2017...
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Page 4: Getting Started
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 “calibrated/zeroed”, prior to beginning CdA measurements. Copyright Velocomp LLP 2008-2017... -
Page 5: Equipment Requirements
NOTE: CdA aerodynamic measurements are tricky to make, especially outdoors. Please follow these instructions carefully so you will get good results! NOTE: “ONE-LEG” POWER METERS ARE NOT RECOMMENDED FOR CDA TESTING. IF YOU HAVE QUESTIONS ABOUT A DFPM PLEASE EMAIL TECHNICALSUPPORT@VELOCOMP.COM Copyright Velocomp LLP 2008-2017... - Page 6 STEP 4: OUT-AND-BACK CALIBRATION RIDE Your PowerPod or Newton requires an out-and-back (O&B) calibration ride, to fine-tune its tilt and wind sensors. An O&B calibration ride MUST be done each time, prior to starting any CdA measurements. Copyright Velocomp LLP 2008-2017...
- Page 7 NOTICE: AFTER BEGINNING YOUR POWERPOD CAL RIDE, IF YOU WISH TO TERMINATE (ABORT) IT, PRESS-HOLD THE POWERPOD BUTTON FOR ABOUT 4 SECONDS, UNTIL THE STATUS LIGHT GOES TO SOLID YELLOW. THIS ABORTS THE CAL RIDE AND LEAVES ANY PRIOR RESULTS UNCHANGED. Copyright Velocomp LLP 2008-2017...
- Page 8 PowerPod Out-and-Back Ride Copyright Velocomp LLP 2008-2017...
- Page 9 11) During the Cal Ride you can bike at a leisurely pace, and it’s OK to stop if needed. Your Cal Ride will be unaffected. 12) Ride for five minutes, until “go bac(k), turn 180 degrees” flashes. Copyright Velocomp LLP 2008-2017...
- Page 10 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 THE CAL RIDE AND LEAVES ANY PRIOR RESULTS UNCHANGED. Copyright Velocomp LLP 2008-2017...
- Page 11 4. In the box to the far left of the “Autoname Format…”, type the name you’d like to give to your ride file (in this example, “Serotta”). Notice that the name of the ride file in the dropdown menu changes to what you have typed: Copyright Velocomp LLP 2008-2017...
- Page 12 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 click through the screens you’ll see the same entries as you made when you performed STEP 1 Copyright Velocomp LLP 2008-2017...
- Page 13 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…” Copyright Velocomp LLP 2008-2017...
- Page 14 “after” values in the “Calibration Changes” table. The CdA in the right column is your measured CdA: ß measured CdA is on right Measured CdAà 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! Copyright Velocomp LLP 2008-2017...
- Page 15 (or lost) due to changes in “normal” ride position. Newton displays cumulative Time Advantage on its screen. After the ride, Isaac software provides detailed, post-ride measurement and analysis of Continuous CdA and Time Advantage. Copyright Velocomp LLP 2008-2017...
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Page 16: Recommended Testing Procedure
CDA MEASUREMENTS. ONE-LEG POWER METERS DO NOT MEASURE POWER PRODUCED BY BOTH LEGS. NOTE: CDA DATA IS GATHERED ON EVERY RIDE WHERE YOU USE A POWERPOD/NEWTON AND DFPM. REMEMBER, THOUGH, THAT CDA MEASUREMENTS WON’T BE AS RELIABLE WHEN YOU’RE NOT DOING CAREFUL TESTING. Copyright Velocomp LLP 2008-2017... - Page 17 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): Copyright Velocomp LLP 2008-2017...
- Page 18 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): Copyright Velocomp LLP 2008-2017...
- Page 19 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 highlighted the “Standing” section: Copyright Velocomp LLP 2008-2017...
- Page 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. Copyright Velocomp LLP 2008-2017...
- Page 21 The word “Standing” appears in the middle of the Power graph, and we drag/drop the word to the highlighted section: Copyright Velocomp LLP 2008-2017...
- Page 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. Copyright Velocomp LLP 2008-2017...
- Page 23 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. Copyright Velocomp LLP 2008-2017...
- Page 24 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. Copyright Velocomp LLP 2008-2017...
- Page 25 Conversely, if your current CdA is lower than your normal value then you are MORE aerodynamic and you’ll go faster compared to your normal riding position. Copyright Velocomp LLP 2008-2017...
- Page 26 Note that an imaginary horizontal line can be drawn through the purple graph at about CdA = 0.39. The value CdA = 0.39 is this rider’s “normal” CdA value as determined by the out and back calibration ride done previously with the DFPM. Copyright Velocomp LLP 2008-2017...
- Page 27 Using a PowerPod or Newton gives this rider feedback about the quality of his riding position (Continuous CdA), AND quantifies the Time Advantage of his aerodynamic improvements. Copyright Velocomp LLP 2008-2017...
- Page 28 NOTE: CDA DATA IS GATHERED ON EVERY RIDE WHERE YOU USE A POWERPOD/NEWTON AND DFPM. REMEMBER, THOUGH, THAT CDA MEASUREMENTS WON’T BE AS RELIABLE WHEN YOU’RE NOT DOING CAREFUL TESTING. Copyright Velocomp LLP 2008-2017...
- Page 29 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. Copyright Velocomp LLP 2008-2017...
- Page 30 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. Copyright Velocomp LLP 2008-2017...
- Page 31 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. Copyright Velocomp LLP 2008-2017...
- Page 32 Select the document to view the corresponding 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...
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