We thought about using a small petrol motor but opted for an electric motor instead. We thought about just using an electric battery and hook it up to the combustion wheel, but to hook up a battery to it would almost be impossible because a big battery would need all sorts of leads. Also a battery does not have a spinning mechanism, which could power the combustion wheels and it would probably not spin it fast enough.
After the site visit we knew we would need an electric motor.
Looking at all the combustion wheels in the factory and seeing them spin with the exhaust fumes off an engine, we knew we would have to find a way of using an electric motor to do the job that the exhaust fumes did.
John Grennan (Honeywell engineer) said that he could make a part that would connect to the engine and the two wheels and that would power the turbo, but that it would be at much lower speeds then it would actually be spinning in a real engine. In a real engine it would spin at speeds around one hundred and eighty thousand RPM and we actually wanted to get it going to that speed, but our motor would only spin at one thousand five hundred and fifty RPM.
only spin at one thousand five hundred and fifty RPM.
When we thought about it we decided that if we got it going at one hundred and eighty thousand RPM it would be no good for a demonstration, whereas one thousand five hundred and fifty RPM would be more than enough for just a demonstration.
We wondered if an ordinary socket would actually be powerful enough to keep the engine running at 1550 RPM for a small amount of time for the demonstration. There is also a stand so that the engine will stay stable and it won’t shudder or bounce and damage the compressor wheels. The motor is quite small but it puts out about nine to twenty seven watts witch is really quite powerful for its size. It needs one hundred and fifteen or two hundred and thirty volts to power it.
Matthew’s dad works for slushy so then Matthew thought about where to get an engine so he asked his dad if he might have a motor. At the time his dad didn’t have anything but after a day or two his dad came home with a small slushy motor. Matthew brought into school the next day. So then we asked john if it might work and he said he’ll see if he could make a part to fit it after a day or two he emailed us and said that it would work. Then we plugged it in to see if it would work after sitting around at his dads work for a while and it worked perfectly. Then john sent the stats and an animated drawing of it.
So then we asked John Grennan in Honeywell if the motor might work and he said he would see if he could make a part to fit it. After a day or two he emailed us and said that it would work. Then John sent on the statistics and animated drawings of it. (Please see our website www.stdeclanstechforlife.tk for a viewing of this)
Another boy in our class, Adam Daniels did up some drawings with his dad as to how the motor would work attached to the booster.
After liaising with John Grennan, John organised a prototype to be made up with our motor attached to the booster, which enables it to do 1,550 revolutions per minute.
We are enclosing the prototype with our project.
-Jason Stewart & Matthew Long (construction team)
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