test bench - CML Distribution
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1. TIE cooper Sonir Gata louver Eira Weick GF Er ra led ade Above Brain the size of a planet in a tiny package 31 mm it might look like a speed controller but it has a lot more tricks up its sleeve than that Information is power but using the information is a skill by analysing the data provided you can consider how your vehicle is performing and what you might do to improve it Far better than any temperature check in the pits by the time you have cruised round a lap and rolled up the pit lane the temperatures will have changed anyway What you really need to know is what s going on out there The 411 as it s known Stateside Collecting and playing back information gathered in real time allows you to keep an eye on the gauges and make considered judgments about the limitations of any particular aspect of the vehicle or any potential problems that might need urgent attention in order to avoid permanent damage GET THE 411 The box declares Get the 411 which refers to the 411 police code for here s what s happening It is used to give people a rundown on the events that have transpired recently N ovak present this tiny unit with a footprint of less than 26 mm x 160 WWW RADIORACECAR COM 11 08 Fes The box contains a CD which will install all the set up software required to interface with the PC via the included USB cable and also a full in depth user manual set up2. guide and data collection tips and tricks for labelling channels etc The box also contains adhesive tape and cable ties to tidy your installation although was surprised by the lack of spiral wrap as per the brushless kits from Novak so bought some at Maplin Electronics to keep my installation super tidy The orange base can be fixed to the chassis and the unit simply clips in and out for a quick install and remove process but as a bonus it uses the USB socket to latch onto for security whilst also sealing that orifice from dust ingress and the opposite edge clips over the sensor plugs to prevent them vibrating out of their sockets What a neat touch The clip fit orange base means you can install in a car and quickly remove for race day so you don t carry a weight penalty though the whole kit weighs under 50 g and the extra wiring doesn t complicate your race day any further You only need this gear installed for test days maybe free practice in the morning before qualifying begins at a push as most race organisers would take a dim view of any data loggers installed during Below All the ports are a race or qualifying run labelled for easy installation whether transmitting back The built in G force meter to a pit man or collecting needs no cables data for later analysis as it s a definite advantage over your competitors With the right information you will il be able to accurately tune the carb of a nitro model and
3. 11 69 1 while the 2WD was geared at 9 57 1 so despite the 4WD being heavier having more grip and using more throttle the motor loads are never as high Now understand why 4WD are always running hotter motors than 2WD not just because they can use the power but because of their lower overall gear ratio Sie ta ee el r Class Measurement Equipment z ill Type Onboard Data Logger Manufacturer Novak Price Sentry NE2000 Sentry Pro NE2010 No spiral cable tidy included Unique design innovations Small and light Simple to use and set up Accurate sensor cable pickup G force meter built in Quick remove clip base Great Must Have gadget Above The rpm sensor cable adapter installed voltage cable and a temp sensor squeezed into the heatsink YOU LEARN SOMETHING NEW EVERYDAY Having tried the Novak Sentry in so many different vehicles it really hit me just how much more time you spend at full throttle with a 4WD vehicle over a more sensitive 2WD car or buggy The more throttle applied and the bigger your battery packs and motors are the better your wiring and connectors need to be in So why guess when the Novak Sentry can deliver all the real time information you need to fully understand exactly what your car is doing out on track so you know how to make it perform better or more efficiently Knowledge IS Power so a serious data logger is a major piece of Above All the sensor cables are re
4. EST BENCH motors pushing ever stronger more efficient cars along we rarely dump unless there s a problem so judging the optimum set up is more difficult than ever That s where Data Loggers come in handy not just for full size motor sports but thanks to miniature electronics we have units small enough to fit on 1 10th scale models that collect all the data the same as the full size engineers would use to analyse the chassis and engine performance The current sensor goes in line with a power lead making sure to get the polarity right as everything on the Novak unit is vulnerable to reverse polarity and nothing is protected Any slip will disable the unit and most definitely void the warranty as Novak take the stand point that their unit is so reliable that if it goes bang you must have done something wrong soldered the voltage sensor lead into the battery connections on the ESC and installed a pair of Corally style gold tube connectors to the current unit so could simply plug it into the positive cable between battery and speed controller to measure the whole system power consumption so with the motor not working can activate the steering servo and tell just how much juice it is using and what current rating should be looking for when selecting a LiPo receiver pack regulator If you buy a 3 Amp LiPo regulator and install big digita servos you might find yourself lacking steering speed as the unit simpl
5. e a note of the sensors which are labelled 1 to 6 when rigging your 1 08 WWW RADIORACECAR COM 161 J system up to the car so you know what each gauge indicates The separate analogue loop temperature sensor is for wrapping around things like engine cylinder heads electric motor end cans or exhaust silencers cylindrical surfaces that would be tricky to install with one of the square tag sensors As it is not a digital signal it gets its own two wire channel in the base unit and is easily distinguished from the 6 digital sensors WIRED tried the system in a 4WD buggy 2WD buggy and 1 5th motorcycle all equipped as they are with sensored brushless motors and fortunately the industry standard sensor cable connection means the Novak system will measure all sensored brushless motors regardless of label or manufacturer If you have a sensor less brushless or are running a brushed motor you can t use the sensor interface cable provided so Novak kindly include a magnetic pick up and four magnets for you to stick to spur gears propshafts or even nitro flywheels so you can measure the rotation of anything you desire and if you need to install it to read a propshaft or something else that isn t rotating at engine speed you can dial in the gear ratio so the system works out how fast your motor or engine is rotating By installing the data for overall ratio and tyre diameter in inches it will even tell you the actual ground speed in m
6. gear either electric or nitro models to perfection by reading ET j just how hard the motor is i working A nitro or electric motor h that is over revving will be exceeding its optimum working range and overheat whereas an over geared vehicle will overheat for a different reason because the gearing is making it work too hard and the performance will suffer as a result The Sentry is equipped with a built in Accelerometer to measure G forces in both planes so you can see the acceleration braking and cornering left right forces being applied to indicate the differences in tyre choice steering set up and suspension geometry changes There are two kits available to suit your needs and your budget The Sentry Data Logger NE2000 is ideal for brushless brushed and nitro motors It includes three temperature sensors a battery voltage lead a magnetic rpm pick up as well as the brushless sensor lead interface and In the old days the only indication of your car s performance was to touch the motor after a run and judge whether it felt too hot to touch and later as battery dischargers were developed you could discharge your cells to judge how much capacity you had left and know if you could afford to gear up a tooth higher without dumping before the end of the race In those days battery capacity was the limiting factor to performance but these days with huge battery capacities and insanely fast Above The Sentry Pro comes wi
7. ph cool huh By judging the actual top speed or maximum revs achieved on a long flat road and then comparing the data recorded around a circuit you can tell how far short of full revs you are so you know how far to gear it down Alternatively you might see that the motor is making full revs half way up the main straight so can afford to go up a tooth for a bit of extra speed to get past your rivals The internal servo position monitor coupled with the G force readout meant could dial in exactly the right tyre for the surface simply by watching the G forces rise as got closer to the best set up verified by what I could feel on track also As went through my entire tyre collection for my B4 buggy and logged them all into the system with a description of the set up in the notes area knew exactly which tyre combination to choose simply by looking at the G force readouts for each run Different front tyres determined the maximum cornering forces while my choice of rear tyres made a huge difference to the acceleration available before the tyres began to spin away the power Despite running a hotter 5 5T motor in my 4WD buggy it didn t exceed the 100 Amp draw which expected seeing as the 2WD buggy was hitting spikes over 90 amps with a softer 6 5T motor installed That was Surprising considering that could use more throttle by virtue of more grip in 4WD than 2WD but it became apparent that the 4WD buggy is geared considerably lower at
8. tained in their sockets by the orange clip in base unit Above The only way to correctly gear a brushless motor is temperature so the analogue loop order to deliver the performance the equipment is capable of weaponry to add to your arsenal RRCi detects exactly how hot it gets in action I e n Above The USB port connects direct to the PC push button starts and stops recording Above If I can tidy fit all this in a 2WD buggy it will fit anywhere Some spiral bind helped a lot WWW RADIORACECAR COM WWW RADIORACECAR COM
9. th all these sensors it s a little daunting will monitor either throttle or steering position internally depending on which channel you decide to interrupt with the cable supplied to feed the Sentry with power The Sentry Data Logger Pro NE2010 also includes four extra Digital temperature sensors plus a current sensor and this is the kit we have on review WHAT DOES IT DRAW The current sensor unit can measure current up to 100 Amps by soldering on connectors to fit in line with the power supply By monitoring the current draw you will be able to judge gearing to perfection and make a note of battery efficiency as it will quickly show up any tired or low Above The four additional performing cells as the voltage digital temperature sensors will drop sharply under load You ll have a port to accept the soon understand how good NiMH original two making six in all batteries or LiPo cells with a high Below The analogue discharge rate provide much better temperature sensor is acceleration and overall performance looped for fitting to nitro than tired or budget cells cylinder heads motor end Do the maths and you ll realise bells etc that a 5000 mAh battery discharged over a 5 minute race is an average of 60 Amps yet you will see that it only draws around 25 Amps when runningthe at full throttle on the main straight so the momentary peaks must be well above that elsewhere around the track RRCI T
10. y cannot cope with the power demands o the servos when it is under considerable cornering loads and being asked to make rapid direction changes Likewise you may be lacking braking force simply because the regulator cannot cope with the steering loads as well as supply the throttle servo with several amps as it Si pulls hard against the brake linkages Above Solder on your choice There s only one way to find out and of connectors and put the that is to measure it current sensor in line to see what loads you draw Above The Sensored B shless interface cable provides accurate RPM measurements direct from the electronic signals Above For non sensored l brushless and brushed motors or nitro engines a magnetic rpm sensor is f also provided HOT TO TROT Temperature is probably the most important tuning guide of any hence the system leans heavily towards gathering as much of this simple yet highly valuable information as possible Four optional temperature sensors are included in the 2010 kit and there is an extra port on the multi base to insert the original pair of sensors to make a total of six digital temperature sensors altogether While most temp gauges work on resistance hence need for only twin wires here there are four wire sensors supplying digitally signed signals so they can be separated and identified by the base unit and hence each sensor turns up as a separate line on the graph Just be sure to mak
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