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Nick · Posted: Fri Oct 30, 2009 6:14 am Post subject: New Mamod Loco Test

Well, I finally bought one...

Opening the box:

It was a rainy day today, and we couldn't get out in the field, so I've already ran it 5 times.

The following 2 videos were taken on its 4th run:

I was curious how far it would go on one boiler/burner filling.

I filled the boiler with room temperature water, so some of the gas was used up heating the water.

I was running on 0-72 track, so I figured the circumfrence at 226.195 inches or one lap is equal to 18.85 feet.

I started the run at 11:50 and went until 12:08 (a total of 18 minutes) and then the gas tank was empty. The loco traveled exactly 175 laps.

If 1 lap is equal to 18.85 feet, then the 175 laps is equal to 3298.75 feet traveled.

3298.75 / 5280 = .6248 miles, which is pretty close to .6250 or 5/8 of a mile.

So this means my loco traveled 5/8 of a mile in 18 minutes.

I decided if I already have this much info, I may as well figure out the speed.

18 / 60 = .3

mi./hr or .625 / .3 = 2.083 mph is close to the speed the loco was traveling. It's not exact, because I rounded the run time off to 18 minutes.

I looked up what scale 0-gauge is and found several numbers, but chose to go with the average scale of 1:43 and 1:48.

At 1:43 scale, the loco is traveling at 89.57 mph and at 1:48 the loco is traveling at 99.98 mph! (And I had the regulator almost shut, running it slow Laughing

)

I know Mamods are not made to scale, so I was going by the size of the track, but someone has helped me out and told me the scale size of a Mamod loco is 1:20.3

At the scale of 1:20.3, the loco was traveling at 42.28 mph in my video

(Let me know if I made any mistakes, it's been awhile since I've done this much math. Embarassed

)

Nick · Posted: Fri Oct 30, 2009 6:39 am Post subject:

I just checked how much water was left in the boiler after the run and there was 20 ml. If I had boiled the water then added it to the loco, I think I could have gotten nearly a mile on one tank of gas.

But I am averaging 20 minute runs heating the water with the burner, so I think I will stick with running it that way.

Mamod Collector · Posted: Fri Oct 30, 2009 9:16 am Post subject:

Thats quite a impresive loco Nick, well done on the math too Very Happy

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Mike
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Scorpion2nz · Posted: Fri Oct 30, 2009 9:22 am Post subject:

I will not agree or disagree with your math .as soon as i saw all the figures the eyes clouded over and the brain turned to mush Laughing

newts · Posted: Fri Oct 30, 2009 9:43 am Post subject:

I think you did well with the maths, a very interesting experiment.
Would it be great to break that mile barrier on one filling, a fine achievement for any small loco. Very Happy

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Spokesmann · Posted: Fri Oct 30, 2009 11:52 am Post subject:

The old Bowmans did better....
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Nick · Posted: Fri Oct 30, 2009 2:15 pm Post subject:

Nick · Posted: Fri Oct 30, 2009 4:12 pm Post subject:

Test completed! Bowman 234 far out-ran the Mamod. Results soon...

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