Member postings for Niels Abildgaard

The Fast Ali 210 headstock fit the 920 bed very well up to now.

You are excused if You do not understand my homegrown german but feel free to ask.

Double clicking the pictures make them very clear.

Strange Liasions

liaisons of course

Edited By Niels Abildgaard on 24/07/2023 16:35:55

Fast Ali has delivered my 210 headstock with 85mm bearing holes and 38mm bore spindle on time but with no inner grease seal and dirt and sand everywhere and I am full of joy.

You do not get perfection for 200$

Headstock and spindle fits the old and very well made 920 lathe bed with very minimal modifications.

I have ,as You may remember, made a suitable ,50mm bore,spindle for these headstock that I use in my present 210 lathe for cruelty to scrapsteel.

For a reliable chinese supplier it can be around same manufacturing cost for spindles I think.

920 lathes trades for 300-400£ here and in combination with another 200$ packcage can be unbeatable for cheapskaters.

High resolution pictures.

Google is thy fountain for wisdom : numobams 210-e lathe

I ordered and payed a headstock with 38mm hole spindle for 180/210 lathes 9 july and expect to receive it from danish customs tomorrow.

This will be put on a 920 lathe and if I get round to it will get a spindle with 48mm through hole and 125mm flange.

It is a shame to scrap the 920 headstock and maybe I can exchange the front bearing (35/62/17mm) with a (65/90/17mm)

Glued and screwed

My never ending story

Some more thoughts

How to arange

The Spulgeblaese (blower) on picture is maybe mechanical driven.

It is difficult to see.

Twin two stroke

Comparasion of packaging

Left

One way oil crankcase scavenging

Rigth

Wet sump lots of oil

Upper Austrian with electric blower

Lower Hooper stepped piston

Edited By Niels Abildgaard on 02/07/2023 09:33:35

Edited By Niels Abildgaard on 02/07/2023 09:35:27

The Austrians claim that they can make a two stroke spark ignited than can use a three way catalyst.

This is done by longitudinal scavenge and around half the possible charge.

Doing this using valves in head has been tried by most. car makers

but not with sidevalves that make a very compact layout possible.

I try to find prior writing than my describtion in dec 2014 HMEM

to convince my daugthers in law that they have not married completely useless no brainers.

There are other possible explanations when grandchildren underperform.

Edited By Niels Abildgaard on 01/07/2023 18:20:28

Have prepared a marriage between an old 920 bed and a new 210 headstock but cannot decide which bride.

Please advice me.

Choice?

Three dead ends

Edited By Niels Abildgaard on 01/07/2023 05:45:28

The crankcase scavenged has a volume/packaging advantage

Crancase versus blower

Edited By Niels Abildgaard on 30/06/2023 08:38:31

You have some points.

It is also complicated by being two-cylindered with a lot of gearwheels ,whirling counterweigths,camshaft etc.

I have tried to compare size for a valveles VeloSolex with a coresponding sidevalved version and both crankcase scavenged.

One sealing ring will do

The Austrian need many more to seal two separate crankcase pumps from oil for gear and cams and bearing.

Edited By Niels Abildgaard on 30/06/2023 08:25:11

Somewhere it is written that they intend the twin 2-stroke to run at a mep (mean effective pressure) of 6 bar and have a maximum pressure of 45 bar.

A fourstroke with well engineered inlet tract can run 12 bar mep and ca 75 bar maximum.

Same power from same cylinder volume.Which is lowest mass?

Hello Diogeness and MZ-adorer mgnbuk.

I forgot to mention that it is a three-way catalyst with a Lambda senor.

The philosophy is they run the thing with a pme of only 6 bar or ca half theoretical full charge.

With longitudinal scavenge no unused oxygen escapes during scavenging and cannot disturb lambda measurement.

Unburnt fuel is low on both scavenge schemes and with no fuel in crankcase the oil content in exhaust is not vastly different I think?

Some austrians try to take over the market for catalyzed IC driven generators for hybrid cars.

Two stroke range extender.

It is a two-cylinder two -stroke but not like the famous Trabant where crankcases blew the cylinders with fresh charge.

It is claimed that exhaust can only be catalyzed ,if fresh charge come from blowers separated from crankcase.

Crankcases are full of oil and slidebearings like fourstrokes .

Why?

There are many fools in this world.

Nice to know I am not the only one.

I had a vision on 23 dec 2014 described here

Future car engine?

Some commented nicely and some not so nicely.

Someone in Austria are working on same idea.

Maybe better new car engine

Is it tempting to stop modelling and do some engineering?

Woke up this morning and have a new solution.

I am really to old to make new spindle docks and spindles and one can buy from a fast guy Ali in china a complete 38mm hole 210 headstock with 1100W motor.

I like the bed and slides of the 920 more than the 210 .

I will try to cross breed a litle.

You can find link on the german site I pointed to yesterday morning with all the coloured sketches now not longer relevant.

But fun to scheme.

Hello and thanks to all for proposals.

Kiwis last remark sums my mental blockings perfectly. (Epoxy everywhere )

I have gone to bed every evening for years hoping to have the smashing idea when I wake up.

In vain so far.

The shown thing with two absolutely concentric surfaces (62mm outside to fit old bearing bore) and (cupseat 90mm inside for new bearing) is the most realistic after years of scheming.

Dog and me are to old for travelling but it could be a nice trip to China and se if I could talk someone to try

In headstock production cost it will be peanuts and spindle  a few dollars more.

The line borer would have made me a dream job

:Travel around world with dog in a Gypsy van and make useful lathes of Boxfords and Southbend  without removing headstock.

Edited By Niels Abildgaard on 28/06/2023 20:43:18

Edited By Niels Abildgaard on 28/06/2023 20:48:19

I have speculated for years on how to maintan alignment between spindle bearings when I modify utterly useless hobby lathes with 62mm bearing holes.

A short sequence of pictures show my latest proposal

Bearing enlargement

A scrap-ready 920 lathe is in for a surprise.

30 and 50mm hole spindle,electric leadscrew from Numobams and sewing mashine motor 1500W also from China.

If You doubleclick link You will see a demolished house in background.

Our small town are divided what comes next:

Green eccological Kindergarten or funny house with lively ladies and lathes.

Next fun house lathe?

Double clikc for better resolution