2 stroke Engine dyno home made??????  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> 2 stroke Engine dyno home made??????
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2 stroke Engine dyno home made?????? - 3/29/2007 1:12:53 PM   
jet182


 

Posts: 4
Joined: 3/29/2007
From: , AUSTRALIA
Status: offline 		Is there any way of making a home made dyno for these little engines. Just starting out and would like to see the results of future modifications.
Any help much appreciated.
Thanks Troy
E-mail troylynch182@hotmail.com
       Post #: 1

RE: 2 stroke Engine dyno home made?????? - 3/30/2007 4:39:52 AM   
aussiesteve


 

Posts: 1033
Joined: 10/12/2005
From: TEDA (Tianjin)Tianjin, CHINA
Status: offline 		Do you specifically wish to measure the torque or just see how the performance changes with modifications?

If you wish to actually measure the torque, the easiest way is mount the engine on a tilting platform with a small hydraulic ram and pressure gauge at one end of the tilting arm (the end of the platform away from the hinge of the plate). then couple the engine to a small load (small alternators from motorcycles work well - you can alter the load on them via a variable resistor). measure the RPM and the pressure on the gauge - this pressure will equate to a torque value (Foot/lbs or Newton Metres). Horsepower can then be calculated.

If you just wish to see how performance changes, Mount the engine on a stand, run it with different propellors and measure the RPM with a good tacho. Use the same propellors each time so that the loading is standardised.

Either way for proper comparison, you will need to also measure air Temperature and humidity. then calculate back to standard conditions.

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(in reply to jet182)
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RE: 2 stroke Engine dyno home made?????? - 3/30/2007 1:44:54 PM   
Jezmo



Posts: 809
Joined: 6/26/2006
From: Spring, TX, USA
Status: offline 		Look at this thread
http://www.rcuniverse.com/forum/m_5637891/tm.htm


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(in reply to aussiesteve)
       Post #: 3

RE: 2 stroke Engine dyno home made?????? - 3/30/2007 2:09:06 PM   
Sport_Pilot



Posts: 7652
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		I seem to recall one where the engine was connected to a generator, the load of the generator would load the engine, and an arm from the generator would push down on a spring scale. Measuring the power from the generator was a nice double check on the RPMxTorque from the engine speed and scale reading.

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       Post #: 4

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