This was emailed to me. THIS IS NOT RECOMMENDED BY DTR!!!
Here's the source site:
http://www.josephthompson.net/austin/










Rich

 

You have got to be kiddin

 

And the purpose is what?

 

Nobody was suppose to find out !!!!!........ what a nut. I wonder if it works ???

 

Recognized that right away..............it's a redneck dyno!!!

John (DH)

 

Did anyone notice (among all the other things wrong with these pics) that there are no lug nuts holding the truck tires on?


Rich

 

What state was that plate from? Remind me NOT to visit there!!

 

somebody lose thier sign?

 

Utah.

 

Thanks,

They've grown some smart ones there!!

 

Thanx, I'm proud to say I wasn't born here though.



phox

 

Rich, you need to look again. The nuts that are holding the wheels on are the "inside" nuts. The larger nuts that hold the outside wheels on go right on the "inside" nuts. That is why you see the threads on the nuts.
Tom

 

Got it.
Thanks for the info.

[On Edit: Your right. Taking a better look at it, I see now. Thanks]

Rich

 

Is this what is called a Heath Robinson affair?
Here is my take on this from a rough engineering viewpoint:
I see what appears to be a strain gage between the chain and the vertical axle, but can't figure out how they tie in the drag on the drive wheels to horizontal pull. The brakes on the truck axle appear to be hooked up so presume that truck brakes are applied until the max strain registers on the strain gage. However, when would they know when to stop applying the truck brakes? I can't see any means to calculate horizontal pull to drag on the drive wheels to enable to convert that to a number that has any meaning other that on this "machine". In other words, you can only compare another vehicle on this machine. That brought up another question. If comparison between vehicles is the object, how does one ensure that the truck brakes are applied to the same degree with every application. A half a pound of pressure on the truck brakes may make a big difference in this case. Of course the brakes being hot or cold would not be factor.
And many more questions that probably do not have an answer.
Another thing that is scary is that I don't see anything to prevent the car's rear wheels from slipping sideways. OK that monster chain is in a "V" configuration, but that will not prevent sideways movement of about the width of the tires.
How close or way out am I on my guess as to how this "thing" works?

 

Air brakes work in reverse, if there is no air pressure the brakes are applied. When there is air pressure the brakes are released. if they didn't know what they were doing it would be very dangerous to just remove the pots.