The Bucket Foundry

[WilDun]

https://youtu.be/wE3fmFTtP9g

perhaps this is the new hybrid vehical we might be using in the near future, Mmmm, running on Macrocarpa oil too.
Although orange peel might be good for hiding the nitro smell, which will be necessary as they will get raced.

Thats's about the best thing I've seen in years! - you sort of expect, judging by the sound it'll take off any minute - like a blue ass fly!
That would be an exciting ride round Woodhill Forest! and ........not a casting, wheel, propellor or rotor to be seen .... flapping wings maybe?
It might need to be re-shod between races by a blacksmith though !

[Flettner]

ok Breezy, you enquired about numbers,

Cylinder, Ex 185 Trans 121

Rotary Valve fully open Gibs ie top end.
Shut 80 ATDC, open 35 ABDC

Shut GIB fully closed 55 ATDC
Open GIB fully closed 54 ABDC

Difference, Shut GIB 25 degrees, Open GIB 19 degrees.

[Flettner]

ok Breezy, you enquired about numbers,

Cylinder, Ex 185 Trans 121

Rotary Valve fully open Gibs ie top end revs.
Shut 80 ATDC, open 35 ABDC

Shut side GIB fully closed, closes at 55, ATDC
Open side GIB fully closed, opens at 54, ABDC

Difference, Shut GIB 25 degrees, Open GIB 19 degrees.

Transfers are a little light at 121 degrees but that will have to do with this cylinder, may touch the upper edges to clean them up so perhaps 122 eventually in this cylinder.
This is where I need to cut.

[Flettner]

After some measuring I can get 126 transfers and still retain 185 exhaust, more like what I want. Tig welder will be brought into service for this change.

[Frits Overmars]

Tig welder will be brought into service for this change.

So you'll resort to additive manufacturing?

[Flettner]

Frits , yes I need to alter the pattern but can't be bothered for just one test cylinder so easier to just add a small amount in the exhaust roof and blend. I just want this thing running.

[ken seeber]

So you'll resort to additive manufacturing?

New acronym: SAM = Selective Additive Manufacturing

[Flettner]

My small mill came with this slotting attachment, almost never use it. But when I do, it's invaluable. Making a small tool to do up plastic nuts for a company I do work for. Stroke is adjustable as is speed.
90 to one rotary table.

[WilDun]

My small mill came with this slotting attachment, ........ Stroke is adjustable as is speed.
90 to one rotary table.

I spent a lot of time doing just that on similar machinery! - A bit time consuming maybe, but good for those little one off jobs.
So long as the cutting tool is made exactly the right shape and correctly orientated and you don't lose concentration when winding the rotary table, it does a damn good job but, if all those things are not properly addressed, then you are in for a bit of filing, especially on splines!
(BTW just a general comment, not trying to tell you how it is Neil - I imagine you already know all that!).

Going back a bit to linerless or hard aluminium cylinders ...... was the hard bore technique (silicon precipitation) ever tried/used in two strokes instead of the (probably) much more expensive Nikasil?

Also I seem to remember aluminium cylinder liners being used in one of the flat four (sidecar? Konig?) two stroke engines. When the engine was cold, the pistons had an almost interference fit and the cylinders had to be heated up before it could even be turned over to start! - anyone remember that?

[Flettner]

Some electric stuff for the 360 engine
And my new fidgit spinner, are they still a thing or am I too late.

[speedpro]

what's the smaller box? Electronic throttle controller?

[Flettner]

Fidgit spinner fitted, throttle drive mechanism.
Link Monsoon and an Ignitech. Finally decided to just run the throttle manual for the minute. Electronic throttle a little later when I get some running data.

[190mech]

I'm sure you have a nice 'brush guard' devised if thats going to be the Bighorn 350 replacement...

[Flettner]

The idea is to make a carbon fiber cover/intake horn that seals everything off. But don't care about that just yet. The downside I guess of designing on the fly, never quite sure how it's going to turn out. You know, when it's just 'big picture' stuff in one's head.
This project is boardering on too many new ideas at once, can make testing difficult, so I've decided I'll get it to dyno/run around the yard level first then see where that leads.
In other words don't make the cover just yet as it might turn out completely different.

[Frits Overmars]

...my new fidgit spinner, are they still a thing or am I too late.

Let's just say that you're not too early, but you could still try the German market, who knows. You do know that spinner is German for lunatic, don't you Neil?