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BRIAN
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Hi Krv.
On the first day of the project I gave the lads an old liner and piston to give them a starting point to work from.
Even then it must have been quite a shock for someone to tell you you are going to design and build an engine,
when you don't even know how one works!!!
So it was a very steep learning curve for the first few lessons, so having the bore measurement was a good point to start
calculating all the other dimensions. Every thing had to be as simple as possible. yet involve the lads in as many
learning experiences as possible.
As these lads had left school with very little idea of what they wanted to do , or what they where capable of, the idea was to widen their horizons.
Remember we only had 33 days to complete the project.
On the first day of the project I gave the lads an old liner and piston to give them a starting point to work from.
Even then it must have been quite a shock for someone to tell you you are going to design and build an engine,
when you don't even know how one works!!!
So it was a very steep learning curve for the first few lessons, so having the bore measurement was a good point to start
calculating all the other dimensions. Every thing had to be as simple as possible. yet involve the lads in as many
learning experiences as possible.
As these lads had left school with very little idea of what they wanted to do , or what they where capable of, the idea was to widen their horizons.
Remember we only had 33 days to complete the project.
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BRIAN
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A casting was made for the carb body and a separate float chamber made, so the fuel level at the jet could be adjusted by raising or lowering the chamber. the carb was simple in design intended to give clean running at 1700 rpm.
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BRIAN
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The inlet manifold was made , and the water outlet.
At this time we where looking like we may not make our deadline so I allowed the use of a existing pair of chain sprockets
The shafts for the crank are made from a old truck half shaft that was let down in the heat treatment furnace so we where able to machine it.
At this time we where looking like we may not make our deadline so I allowed the use of a existing pair of chain sprockets
The shafts for the crank are made from a old truck half shaft that was let down in the heat treatment furnace so we where able to machine it.
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BRIAN
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The valves were made by grinding down larger valves to fit our engine required small heads and long stems.
Making the cam shaft took a long while first we wade card profiles pined to a board to find the cam shape and timing angles.
then we made the cams individually and mounted them on a spindle with the bearings and the contact breaker cam, 12 parts in all if I remember correctly.
The rockers were fabricated to keep down the wear on the mild steel cam and roller followers.
Making the cam shaft took a long while first we wade card profiles pined to a board to find the cam shape and timing angles.
then we made the cams individually and mounted them on a spindle with the bearings and the contact breaker cam, 12 parts in all if I remember correctly.
The rockers were fabricated to keep down the wear on the mild steel cam and roller followers.
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BRIAN
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We had to make a dog for the starting handle this caused a little problem as not one member of the class knew
what one was.!!! this was after about 28 weeks of instruction. Just don't see them any more.
the engine was almost ready to run inspect everything an clamp it to the bench.
I feel that the test results taken from the class log are more appropriate than my comments at this point.
We only just made it in time for the end of the year..
Brian.
what one was.!!! this was after about 28 weeks of instruction. Just don't see them any more.
the engine was almost ready to run inspect everything an clamp it to the bench.
I feel that the test results taken from the class log are more appropriate than my comments at this point.
We only just made it in time for the end of the year..
Brian.
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BRIAN
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So next year we had an engine.
Do you want to see the car ???
Do you want to see the car ???
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BRIAN
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Thanks Dave glad to know you enjoyed it,
When I get some spare time?? I will post the car build.
Regards BRIAN.
When I get some spare time?? I will post the car build.
Regards BRIAN.
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BRIAN
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Hi Paul in the car the engine had a thermosyphon cooling system with a home made radiator and could be ran continuously.
It often ran all day at events we were invited to, giving rides for a good cause.
BRIAN.
It often ran all day at events we were invited to, giving rides for a good cause.
BRIAN.