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RC Engine Dyno Website - 1/11/2002 5:35:40 AM   
Elwood



Posts: 1512
Joined: 12/11/2001
From: Wayne, NJ,
Status: offline 		I am thinking about building an engine dyno for RC sized engines. I would post the results on a web site. The testing would be primarily about engines for cars, but aircraft engines are also a good possibility, as well as for boats. Any thoughts? Would this be worthwhile? Do you want to see this? Thanks!

Vote! Vote! Vote! Vote! Vote! Vote! Vote! Vote!

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RC Engine Dyno Website - 1/11/2002 5:08:20 PM   
Elwood



Posts: 1512
Joined: 12/11/2001
From: Wayne, NJ,
Status: offline 		Some of the areas that can be explored:

[list]
  • Side by side comparison of competing engines
  • Pipe length tuning
  • Tuned pipe comparisons
  • Muffler comparisons
  • Effects of Nitro Content on power
  • Effects of plug type on power
  • Oil content and Horse Power output
    [/list]

    The site would be just for dyno results and RC Nitro Engines. What do you think?

    VOTE!!!

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    RC Engine Dyno Website - 1/11/2002 8:47:37 PM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		How do you propose to build a Dyno? Please elaborate...

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    RC Engine Dyno Website - 1/11/2002 9:32:02 PM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		With a lot of money!

    Just kidding, sort of...

    I can have one made from the same company that made RC Car Action's dyno, but that would cost about $12,000, just too much. Basically, I would build a scaled down version of a full size engine dyno. The data acquisition equipment and software is already available. The cost for this (machining, data computer, PC, etc) would run under $2000, I hope.

    Oh, and then the cost of test engines!

    Elwood

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    RC Engine Dyno Website - 1/11/2002 9:55:34 PM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		Ellwood

    Even at $2,000.00 this would be a pretty lofty adventure.

    I used to have a scratch built dyno that worked very well.
    It utilized a ducted-fan assembly with a digital scale, mounted on a roller bearing supported sliding unit with various other devices to measure performance. Static thrust was the most obvious user comparable measurement without any high end computer generated data. Cost was minimal and the fan unit was a standard that all was compared against.

    What will use for a power absorption device?

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    RC Engine Dyno Website - 1/12/2002 1:04:50 AM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		A flywheel will be used.

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    RC Engine Dyno Website - 1/12/2002 1:16:48 AM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		A flywheel is interesting. Do you have info or a website with information on the data acquisition equipment?

    You mentioned that RC Car Action has a high-end dyno, do you have info or a web address for the article?

    What is used to compile data from the flywheel?


    I like your idea for a dyno data compilation on various engines.

    RCFAQ's has engine data with user submitted RPM numbers and is working on weight data base.

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    RC Engine Dyno Website - 1/12/2002 1:27:30 AM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		http://www.land-and-sea.com/

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    RC Engine Dyno Website - 1/12/2002 8:27:29 AM   
    Fuelman


     

    Posts: 1039
    Joined: 12/31/2001
    From: Jordan, NY, USA
    Status: offline     		Elwood,
    I love the idea.

    Sent you a private message.

    Fuelman


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    Fuelman
    Cooper Fuels LLC

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    RC Engine Dyno Website - 1/12/2002 9:18:20 AM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		They have some nice equipment and good info on this site.

    I like the way the water brake absorber is setup. More user data is available. Have you considered it?

    Attachments
    Click to see fullsize image.
    Click for fullsize


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    RC Engine Dyno Website - 1/12/2002 9:47:12 PM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		Michael,

    What was that web site?

    I have looked into it, but as the water temp increases due to friction and such, the test will be thrown off. If there is a water temp sensor, and the program can compensate for it, that should work.

    Thanks,

    Elwood

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    RC Engine Dyno Website - 1/12/2002 11:00:19 PM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		Ellwood

    Same site as you provided above.

    The water is either cooled or in this case the demand is so small they using a garden hose to supply the water and dump it.
    Larger systems use a water cooling tower much like an evaporative cooler to cool the water, recirculate it and maintain a useable temperature.

    The water brake is a very effective consistent system. Our racing team has a 5000hp water cooled dyno for R & D of racing engines at our facility. I am involved on a limited basis with this program.
    Currently we are racing Nostalgia fuel Dragster's. For many years we raced on the water. The dyno has proven to be an irreplaceable wealth of information. The shop the owns the dyno supports the racing habit with performance engine building and machine work.

    This litlle absorber would be the one to use.

    Attachments
    Click to see fullsize image.
    Click for fullsize


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    RC Engine Dyno Website - 1/12/2002 11:19:40 PM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		I was looking at the eddy current dyno there. You have made some very good points regarding the water dyno. One of my other hobbies is tropical fish. An h2o system should be easy for me to set up.

    I looked elsewhere on their site and looked at the dyno comparison chart. Very interesting...

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    RC Engine Dyno Website - 1/12/2002 11:40:12 PM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		I sent in another request for information regarding the one that you have in this thread, as well as the other one there. Should be interesting, and hopefully a lot cheaper.

    Perhaps I will have to invest in a small milling machine. I wonder what my wife will think of that...

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    RC Engine Dyno Website - 1/15/2002 4:01:17 AM   
    Elwood



    Posts: 1512
    Joined: 12/11/2001
    From: Wayne, NJ,
    Status: offline     		Regarding the Water Brake, they do not make it anymore. They said thet it was harder to control and machine, and that the other type was easier to work consistently. I might go for option C...

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    water brake - 1/15/2002 4:11:20 AM   
    mglavin



    Posts: 5203
    Joined: 11/29/2001
    From: Elverta, CA, USA
    Status: offline     		Chances are Ellwood they do not make near as much money offering the water brake as compared to their eddy current brake...

    Supply, demand and profit dictates what is offered. I suspect the demand is very small for such a small water brake. And when you hook someone you want to make as much as possible, right?

    The eddy current brake rated at 1hp is over $7,000.00 plus $2,000.00 worth of software. Give me a break...

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