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our dynamometer or dyno for short. We call her Betty because she's
dressed in red and sometimes tells us what we want to hear, other times
she tells us to go back and try again. She's a 5" Water Brake Dyno one
of the smallest in the industry. Most shops have a big dyno that can
handle all the engines customers have up to 40HP. That big of a dyno
just can't hold an rpm range long enough to see what is going on so we
invested in a Land and Sea. We purpose built the frame to handle direct
drive and belt drive. This gives us the ability to test different things
right off the crank or with a pulley similar to a chain. Betty's total
investment with time and materials, computers and mechanical components
was about $10,000. She was worth every penny as she showed us things we
never saw before, gave us HP we never experienced before and data that
only a true engineer could love. Dyno Room Computer During Break in Video <- Click here to watch the Land & Sea software track the engine HP, RPM, Temp, etc.
Betty can measure 20 different items at once. We don't use all that capacity just yet but someday we will grow the number of variables we track. Head Temp, Exhaust Gas Temp, RPM, Torque and HP are tracked along with weather related items like air temp, air pressure and humidity so correction factors can be put in real time. HP is tracked out to three decimal points. HP is corrected for the pulley system as well as inertia of the flywheel and such so that the HP is correctly displayed based on RPM and rate of variation of RPM . So instead of 2.6 hp before now we read 2.659 HP and 2.23 of torque. It makes a difference when you are testing very small changes to see what they do to the engines.
Why didn't we just build a basic back yard dyno and throw a Mychron on it? Because we wanted to know the answers and the best way to do that was to leave the building of the dyno to the professionals at Land and Sea. People utilize us because we are the experts on Comer engines, why not rely on the best in the dyno industry? Land and Sea were the only ones of the five companies we contacted that could fill the need of a direct drive dyno that could handle 14,000 rpm with no water in the brake. So much of Comer C50 testing is high end RPM testing because of the 89 fixed gear standard.
Our chief engineer's degrees is in Computer Engineering with Mechanical and Electrical emphasis areas. To be a robotics engineer you need three degrees and he was working on all three. Utilizing a Dell Pentium to interface with the Land and Sea data acquisition system was the best bet for accuracy and control. Data is then transferred to a Toshiba laptop for trips to the track to line up Dyno test data with engine selection for big races. The dyno is configured for both K80 and C50 engines and could be configured for Yamaha engines down the road.
So if you get serious about racing the C50 or K80 engines and want a team that has the tools to do the job give us a call or drop us an e-mail.
The young owners of ComerJet Working the Dyno on the last full week off before school starts. Overhead will go down when the boys head back to school. They are so expensive and it takes a bunch of milkshakes to get them cooled down after a day of dyno testing.
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