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From the blog

We killed our dyno

Gale points out how we killed our dyno just as we were wrapping up the rear differential deal with testing.



  1. I used to run our clayton dyno at 400 hp for hours with no issues
    Dyno are like any other piece of equipment they require maintenance
    Most dyno repairs are reactive repairs as in after it breaks instead of prosctive
    People think any one can run a dyno
    But dyno operators can feel and or hear things because they know the machine

    Spend many of hours replacing pillar bearing rollers valves in my 27 years operating shops dyno

  2. time to dig a bigger deeper pit.. pick up a good used locomotive traction motor. have one of the machine shops with the large ability create rollers for tires that fit on the traction motor wheels.. and source a set of resistor packs and fans off another retired diesel electric.. now you have a regenerative braking dyno that you can't break.. if a dozen or 20 traction motors in regenerative braking can hold back a mile long freight train coming down the Cajon pass no super charged turbo charged diesel engine will be able to overheat it.. there are several locomotive scrap yards scattered around the country.. the only serious machine work is to true up the traction motor wheels to fit the rollers on.. and creating some kind of switch gear to control the amount of braking. i bet there are enough railroad personnel and retired railroad employees that could whip that up. the only serious issue would be to calibrate it.. but measuring the amps and the amount of pull with scales should handle that.

  3. Mr. Banks, I have heard of this problem before. It was a similar "overuse" situation. I think I can solve that problem. In one year I'll be defending my thesis for an M.S. in engineering. I'll be sending your office a CV in March, of so, of next year. Thank you for your consideration. PS- I'll reference this comment in the cover letter.

  4. Use cryogenic gas (nitrogen) as part of an air to air heat exchanger to super cool the stream of outside air prior to blowing it across the rotors. You could also vent nitrogen gas into the dyno pit if a fire did occur.

  5. I used the same type of dyno in testing variable speed drives. Only one coil. At 100 hp the rotors would glow cherry red! But we could run around the clock for months at a time. Cool down when taking the load away was around 30 minutes.
    I suspect at many times 100 hp, even for short periods took its toll, especially with no cool down. Duty cycle went down with each high HP run.

  6. Air cooling will not help much, be lucky to stay under 500 degree in 3 minutes. Gale knows air doesn't conduct enough heat away to be that efficient.  Water cooling would be more efficient but I'm sure that's very expensive considering the size of heat dissipation unit he would need  running 653 degrees @250Hp!!  Can't wait to see the upgraded dyno in action. Lovin the series Gale!!!

  7. on the farm the tractor dyno uses water cooling. after and engine rebuild we would run 1/4 1/2 3/4 and full load to seat in the engine. it would run for an hour easy. the water would be warm to hot depending on the hp of the tractor being tested.

  8. Even if you manage to keep the heat out of it, you'll burn the pads and rotors off it before two hours is up. That type of Dyno is for momentary peak power testing. You need a water brake Dyno for sustained tests.

  9. The eddy current absorber that burned up is made by TELMA. it is made to mount inline with a large trucks drive shaft and is used to provide braking. ( Reterder ) Basically it is a rotating magnetic brake that turns rotary motion into heat. It is not a motor and won't rotate if you apply power. This is rebuildable as long as the iron isn't damaged, the electro magnets come off.

  10. Dude you are the man! Your out to produce quality products and prove that they are superior and you let nothing stand in your way of that. Also on a side note please make a differential cover for the GM 9.5 14 bolt semi floater when you start production. I would love to get my hands on a Banks proven functional differential cover. Have a good one bud.

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