Model Engine Maker
Engines => Your Own Design => Topic started by: Tonyr on November 19, 2017, 04:42:50 PM
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Hello,
I haven't been active on this forum for quite a while.
I haven't been idle though.
A couple of years ago I purchased a 1932 Austin Seven car, which takes up a lot of my time.
I decided to try and make a model of the Austin engine.
Here are a few photo's of the progress so far.
I have more photo's of the individual parts if anybody is interested.
Tony
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Nice looking model excellent details! How large is it? Would definitely be interested in more pictures.
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Interesting model :ThumbsUp: :ThumbsUp: I remember reading about Austin 7 engines used in competition were the two middle pistons were machined slightly shorter to allow for the whip in the two bearing crankshaft ::)
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Crueby.
The engine is about 1/3 scale, the block is aprox 4 inches long.
I have the photo's on the iPad and they are too large to post.
I will post the pictures when I figure out how to shrink them, any help would be appreciated.
Tony
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Tony, here is a free one that will let you resize batches of pictures at one time. It seems to be ok, you will see under the advanced options where you can select the output size. For forum use 800 x 600 is more than adequate.
www.faststone.org/
Bill
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Bill,
Thanks for the link but I don't think it works on the iPad.
Maybe I will have to do it on the laptop.
Tony
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Yes sorry about that. Surely there are similar free programs for the iPad though. Maybe an iPad used will chime in here with a suggestion.
Bill
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A couple of photo's of the crankshaft to test photo resize.
Ton
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Try again !!
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More photo's.
Cylinder block and cam manufacture.
Tony
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Very well done!
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Hi Tony, impressive.
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Hello Tony,
Your austin engine looks very nice. I currently build a very similar engine.
I will follow until it fires up.
Best regards,
Thomas
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Thanks Achim.
Thomas, I have been watching your engine.
It does look very similar to the engine I am building.
I have been watching to see if I can get any good idea's from your build.
Tony
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Hello,
I haven’t posted on this build for a while.
Other than the short detour whilst I got the Bruce atmospheric engine running, I have been working on the Austin engine periodically.
I have the cylinder liners fitted and the Pistons and Conrods finished.
The Dummy dynamo is almost complete.
The Dynamo has an aluminium disc with magnets inset.
This will fire the ignition system via a Hall effect sensor.
Tony
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It has been a while but I can relate to that as well. Good to see your progress Tony.
Bill
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Hello Tony,
Nice looking engine and parts.
Have a great day,
Thomas
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Very nice Tony. Please keep posting pictures. I will definetely follow this one.
-Bob
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Hi Tony, glad to see some more progress. That will be an extraordinary model engine.
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Thanks for the comments.
I will try and keep the post updated a bit more regularly.
Tony
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Hello
As I said in the last post I am trying to keep the post up to date.
This week I finished the valve guides.
They are now fitted into the block.
Next will probably be the valves followed by the cam followers and guides.
Tony
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More good progress Tony :ThumbsUp:
Bill
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Hello
I have a bit more progress on the engine.
The valves and caps are finished as are the cam followers and guides.
The cylinder block is mostly finished now.
I will probably move on to the manifolds next.
Tony
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thats some pretty deluxe work. very nice!
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That's coming along wonderfully!!!
Dave
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Thanks for the comments
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Hi Tony, waiting for the next steps, a very nice engine so far.
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Thanks Achim,
I have just finished the screw adjusters for the cam followers.
I think I will start the exhaust manifold this week.
Tony
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Tony,
The Austin 7 engine looks great.
Art
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Thanks Art,
I have just started the exhaust manifold.
When I have something worth photographing I will post more pictures.
Tony
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Comming along nicely :praise2: I'm still following along :wine1:
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Hello,
I have made a bit more progress.
The inlet and exhaust manifolds are now done.
They took me a bit longer than I anticipated.
I need to think what the next steps are.
There is still plenty to go at, but every part is a step closer.
Tony
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That looks great!!! Sweet little engine they were!
Dave
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Hello,
Again it has been a while since I posted any progress.
Progress has been steady.
It is probably about 90% complete now.
All the internal parts are made apart from the piston rings.
I have been following the post on the Westbury Seal, I am struck by how similar that engine is to this engine.
Lots of the parts are made almost to the same design.
Tony
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Wow! looks great! Would like to have seen more build information.
gbritnell
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Very nice work! More details appreciated!
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Hello Tony,
I have been following your Austin seven story since you started it all those years ago. In fact it was one of the inspirations for me to build the Westbury Seal. You are so fortunate to have a full size one to copy.
Your workmanship does you credit, it's a good looking engine, and well made. As gbritnell and Nick say ' would like to have seen more build information'. It's not too late to post more photos.
The side valve Austin Seven was immensely popular (and affordable) in England during the 20's and 30's. It inspired enthusiasts to build homemade 'specials', there was also the very popular '750 formula', which was the breeding ground for a number of big names in motor racing in the years to follow. So it comes as no real surprise the Edgar Westbury borrowed much of the 'Seal's' design details from the Austin Seven. At the time, it was how auto engines were designed. Pity he did not incorporate the later centre crankshaft bearing
Keep us posted as you proceed to the finish line. :ThumbsUp: :ThumbsUp: :ThumbsUp:
Mike
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How are you lubricating the crank? Will it be splash or jets?
Bert
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Thanks for the comments.
I will dig out a few more pictures of the build.
Mike, this engine has a two bearing crank.
It is simpler and the engine in my car is the two bearing type.
Apparently the three bearing cranks are more prone to breaking.
I think there was too much material removed to incorporate the centre bearing.
I am trying to make the engine as close as possible to the engine in my car.
It is close but there are a few compromises.
There were a few different variants of the engine over the years.
Mine was made in 1932.
I think I will remake the inlet manifold, it is ok as a manifold but the shape is not quite correct.
Bert, the lubrication will be splash.
I thought for a long time about fitting jets as the original.
There isn’t much room to fit the gear on the rear of the camshaft.
I am fitting dippers to the Conrods, hopefully to create a bit more splash.
Tony
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wow most parts looks from casting. all with turning the wheels on the mill! Great job. It would be nice to see how you build the new inlet manifolds!
Alex
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I remember reading someone's book on their 750 special where they noted that the middle pistons were machined a little shorter to allow for the whip in the two bearing crankshaft. With a 750cc side valve special they were happy to reach 75 mph :)
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Hi Tony, looking very nice, great progress.
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Been quietly following along :popcorn: :popcorn: Excellent progress :ThumbsUp: Terry
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Thanks for the comments.
It is coming along slowly.
I have been making a list of what is left.
There isn’t that much to do now.
Tony
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Tony,
That is quite an amazing project you have going there. A quick question, is that the generator between the engine and the distributor?
Art
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Hello Art,
Yes on the real engine that is the dynamo.
It is driven from the camshaft and the distributor is driven from a gear on the end of the Dynamo.
On my engine I have adapted it the fire the ignition.
There is an Aluminium disk in there with magnets fitted to trigger a Hall effect sensor.
One of the main challenges is making the engine look like the original whilst having the functionality at the small scale.
Obviously the original has points in the distributor.
It is quite difficult to fit things in, so there are a few compromises.
The carburettor was another challenge.
Superficially it will look the same as the Austin Seven engine hopefully even to the trained eye.
Thanks
Tony
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Hello,
I bit more progress.
It doesn’t look much different but I suppose when all the big bits are done the smaller parts don’t change the appearance much.
I have made the valve cover and the fan pulleys.
I have also made the starting handle and associated parts.
I have added a photo of the offset being machined on the belt adjuster.
Thanks for looking
Tony
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That's looking really good and I speak as the former owner of a number of A7's.
Brian
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Hello,
I haven’t been on this site for quite a while. It’s not that I had any problems with it.
I retired from work about 18 months ago and have been really busy with new things.
I hadn’t been in the workshop for ages. This week I decided it was time I got back in there.
My Austin seven engine has been more or less finished since I retired. I decided this week to see if I could get it running. After a small amount of setting up the engine runs.
The link below should take you to a video of it running.
There is a bit of work now to tidy it up and finish it as a display.
Thanks
Tony
https://youtube.com/shorts/3ul7Z3comAI?feature=share
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That is a fine looking and sounding engine Tony. Do you think you will make a scale radiator and surround to go with it?
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You could put it up here - like this :
#Invalid YouTube Link#
Lovely Engine and it runs like a dream too :praise2: :praise2:
I also thought about a radiator during the video ....
Per :cheers:
I could have sworn that the Link worked when I posted it :killcomputer: :wallbang:
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Yes, that is the plan. I will sit it on a model of the chassis with a radiator at the front.
I am back in the mood for it again after having some time away from it.
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I was hoping you would include a chassis!