Scott flame licker build

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NickG:
should look great john. Dave, damn that predictive text ... In actual fact I've been tee total since 30th Dec !

Divided he ad:
Looks like you're having fun John :thumbup:

Totally :offtopic: but... Just catching up on all the latest bits I want to.... tried to look through a few threads over the last few nights and found myself waking up with a bad neck in my Comp' chair :palm:

I'm actually experiencing my first free evening in what seems like a month! :ddb:

Looking forward to seeing the rest take shape.... I'm still not sold on these castings though. It does look like cast iron is very messy and the shapes can be seemingly very complex to machine when compared to bar stock. I am obviously aware of the ease of creating a more complex part though.

Still plenty of time to experiment someday myself though. Threads like this will come in very handy at that point :)

Ralph.

Bogstandard:
It doesn't seem like three weeks since I dropped this post to get on with the Minimag build.

But anyway, back I am, and ready to pick it up almost from where I left off.

The magneto build left me with a bit of a bling bug to get out of my system, so this is a little diversion that isn't shown on the plans.

Some of you will recognise this bit of brass left over from the swing up threading post, but the threaded bit on the end is just perfect for what I want.
I just took the thread down until it was cleaned off.

A quick change of tool and I had a spigot of the right size formed on the end.

A large profile tool soon had a nice radius formed.

Drill out the end a bit.

Then opened up to the required size. All this by the way is being done by eye, except for the spigot on the end size.

The bit I want was parted off.

Now comes the experience bit. All my working life, and a bit before, I have been hand shaping parts on the lathe, using a few basic tools. The basic name for it is called graving, a basic watchmakers technique which uses shaped hand held cutting tools similar to what a wood turner uses, but much smaller. I am not using those this time, just files and a sanding block, and I use it just to give me something unique that is very quick to do.

It is not difficult at all, and a lot of lathework started off just this way, but it can be dangerous if you don't know how to hold the tools correctly, and also, you are working with your fingers very close to a fast spinning chuck, and as you all know, machines have no feelings, and they will chop you up just as easily as they chop up metal and other materials. So unless you are VERY safety conscious and scared to death of your machines because you know what they can do to you, don't even try it. I am only showing the basics here, and even though it can be dangerous, it is a perfectly recognised way of shaping items in the lathe.

First off, the part was remounted back into the self centring four jaw chuck with the bit I want to shape up to the outside of the jaws. Using hand and eye coordination, plus a boring bar, I roughly profiled the inside of the part to match the outside bit which had been machined.

Using just a few files and a sponge emery block, I blended all the rough cuts into one smooth flowing rounded shape, getting rid of all the maching marks at the same time.
A sheet of white paper put onto the background helps in seeing that everything is blended together, having just nice rounded curves with no flat spots.

A quick dose of Mrs Buff had a nice basic shine added to the part. Just before final assembly, it will be given a final deep lustre polish.

As you have most probably already guessed, this is a nicely shaped funnel for the water jacket, instead of the horrible gaping hole that is shown on the plans.

Total time, just over an hour. Time well spent as far as I am concerned

Now the bling is out of my system for now, I can get on with building the engine.

Bogs

shoey51:
Lovely bling :thumbup:

spuddevans:
Cant beat the bling :D

Lovely flowing lines on that funnel :thumbup:

Tim

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