Drive train test stand.(upgraded to AWD version)

[fhhhstix]

Claus sent me a pic of a drive train test stand the other day and it got me thinking. So I built one and I think it will be handy to have for testing new trucks when the weather out side doesn't cooperate.

Mine has an adjustable cradle for the front axle so you can test any length of chassis. Well here are some pics and a video.









Click here for the video


Let me know what you think.
Travis

[ihbuilder]

looks good OO just like a loco test stand/s

[MACK Daddy]

i like that



Alfy

[rockNmayhem]

For some reason I'm picturing trying to turn this in to a mobile dyno for the trucks. I just wish I could now figure out something to test the power with and I'd be building it.

Tyler

[dabears]

Thats really cool! I liked the one Oz made and was trying to figure it out, looks like you got it nailed and i like that its versatile for different truck lengths! Very cool!!! You gonna be selling them??? It's a better option to my method of using a small 1/4 pint paint can to prop up the rear bumper

[Claus]

Very nice, wouldn't mind having one of those myself.

[Cossett]

Looks like the new improved version of Oztrucks roller..so when will you be selling them?..

[CG Bob]

Originally Posted by rockNmayhem

For some reason I'm picturing trying to turn this in to a mobile dyno for the trucks. I just wish I could now figure out something to test the power with and I'd be building it.

Tyler

There was a discussion about finding the "Kv constant" for an unknown motor on another board. Basically chucking the motor in a drill press set at a specific rpm, and measuring the voltage generated by the unknown motor.

The same basic set up could be used as a mini dyno. Connect a separate motor to one of the test stand rollers. The motor can be connected directly to the roller shaft, or with gears, or belt driven; the two gears or pulleys must be the same size. Attach a Watt meter to the leads of the motor. 746 Watts = 1 hp.

To see how close your model hp scales to full size hp, multiply the model Watts from the dyno by the cube of the scale. Let's say your 1:16th scale truck generates 91 Watts on the dyno. 16 cubed is 4096. 91 x 4096 = 500 hp.

[fhhhstix]

Originally Posted by ihbuilder

looks good OO just like a loco test stand/s

Thanks Steve.

Originally Posted by MACK Daddy

i like that



Alfy

Thanks Alfy

Originally Posted by rockNmayhem

For some reason I'm picturing trying to turn this in to a mobile dyno for the trucks. I just wish I could now figure out something to test the power with and I'd be building it.

Tyler

That is next on the list as well as some other ideas Izzy and I were kicking around.

Originally Posted by dabears

Thats really cool! I liked the one Oz made and was trying to figure it out, looks like you got it nailed and i like that its versatile for different truck lengths! Very cool!!! You gonna be selling them??? It's a better option to my method of using a small 1/4 pint paint can to prop up the rear bumper

Thanks and I am not sure about selling them as I don't think it would be realistic with the cost of the parts. The delrin rod is $8 a foot (sold in 5ft pieces) by its self then the $15 for aluminum, $8 for the steel rod + misc is about $70 in parts alone. Then you add about 4 hrs labor your going to be close to $150.

Originally Posted by Claus

Very nice, wouldn't mind having one of those myself.

Thanks.

Originally Posted by Cossett

Looks like the new improved version of Oztrucks roller..so when will you be selling them?..

Thanks.



Thanks to everybody for looking.

Travis

[fhhhstix]

Originally Posted by oztruck

You will find that if you put a vehicle with non standard rear wheel spacings on your unit you will have trouble. It will walk all over the rollers.

But it sure looks nice.

Chris

Thanks Chris and I know what you saying but I have thought about the different wheel spacing and have that worked out. I built a new front wheel holder so I can do AWD trucks as well and the new slider with the rollers on it will slide all the way back to the rear and give you the same spacing as a set of duals. So now you can do a tri drive as well and you can adjust the slider and use it and the front set of mounted rollers for different axle spacing.





Travis

[ryman]

Thats a great idea.

[russisloud]

that is a kool set up

[fhhhstix]

Originally Posted by ryman

Thats a great idea.

Originally Posted by russisloud

that is a kool set up

Thanks guys. I think I am going to look into some other building materials and see if I cant build one that is affordable and is quicker to build.

Travis

[Supermario]

Hey Travis ,
Another potential for this would be amperage draw tests on your motor.No need for more motors and belts and calculations to figure horsepower and create a dyno. Just connect a meter and record and monitor amperage draw in various gear ratio arrangements, etc....using a variable resistance on the rollers?
Always love your creations bud
Are you sure you are focused at work everyday? . Seems like your mind is elsewhere perhaps..... Lol

[ihbuilder]

Hey T , a suggestion on the varying tandem rear axles spacing is make 1 of the rear roller groups slide like the front 1

[fhhhstix]

Originally Posted by ihbuilder

Hey T , a suggestion on the varying tandem rear axles spacing is make 1 of the rear roller groups slide like the front 1

Now you have me thinking about a whole new design all together.

Travis

[sandfarmer]

Looks like it's coming together, should be really handy