Various restorations/projects from Bosnia

[selmir_Bosnia]

Hi all!

I was veeery busy in last weeks, way to much work. I used every spare moment to work on few projects. Here is one.

I restored ancient wheat and corn mill with stones. It is pre-WW2 as far as I found out. After complete dissassembly, i sanded everything, changed bearings, attached motor (it did not have any) 1.1kW 3 phase. It works perfectly now, i only have to paint it with clear coating and make flat belt, want it that way so it will remain in original.

https://www.youtube.com/watch?v=dMZwYOXvhRM








Another project was this small chainsaw. I was on scrapyard looking for something (had no idea what am I looking for) when i saw it in large pile of metal scrap. After some struggle i pulled her out and saw that she is complete and has compression. Bought her for whole 2.5 eur (5 kilo). After inspection at home i realised that her only problem are cracked pipes for gasoline. I replaced them (allways have some spare pipes) and, believe it or not, she worked like a charm. After some cleaning and new spark plug, I used her to cut large pile of thin wood. Very nice machine, very light and easy to work with.

[selmir_Bosnia]

Hello guys, you forgot about me

Here I am again, no time for any projects anymore, too many other things to do unfortunately. Yesterday I started to harvest corn and managed to bring home corn from only one field before rain so we will have to wait at least 10 days before continue.
Here you can see few videos, hopefully I will get some spare time during winter, I miss my DIY days at my workshop.

https://youtu.be/G1XEgGKnkiM

https://youtu.be/blgngKz86QM

[Holger]

No Selmir, we do not forget about you!
We are looking forward to your updates!

[dea]

Nice videos

[selmir_Bosnia]

Here I am mulching some corn stalks with Zetor 7045 and Kirchner Sh230 Y-bladed mulcher. It works like a charm.

https://www.youtube.com/watch?v=8sCIX5C5TLM

Here is the same field being harvested one day earlier

https://www.youtube.com/watch?v=bVszskthIlg&t=4s

I am not pleased with corn yield this year at all. Last year I had 14 tons of dry grain (14% humidity) per hectar, now only 10 tons at 13.8%.

[selmir_Bosnia]

Hi guys! Here I am back again!

I am so bussy lately, have no spare time at all but have loads of ideas. Not the mention all the COVID-19 hassle, I am assigned to work full time in powerplant since 95% of all other workers are sent home, then rush home and wash and undress before I go into the house. It is not that bad here (126 sick people) but It will get much worse in nxt days. Hope all of you guys are doing well!!

SO, back to the ideas!
Here, this is definitely a weird one.

I am in need for a bigger air compressor, have one but it is very small, 25 liters only. I can very barely use it for any air tools, impact gun only, painting is very hard since compressor mist work almost 100% of time.

I have big 2 stroke Sachs engine, 275ccm, 10HP and it has its own air cooling and is very solid. It is built in 1966. but it is in great condition and has massive compression (you can not turn it by hand!). It is not usable as engine anymore since original carburater is dead and it was using way too much fuel to be usable anyhow.

I have an idea to turn it into compressor pump. So, idea is to block inlet and exhaust from the outside but that leaves me with channles that connect lower part of ebgine housing with cyilinder. So, I thought to block them too with a thin sheet of steel plate that I would mount between cylinder and engine block (cylinder is removable). That way, I would completely seal the space above the piston. Lubrication would be solved by puring enough oil inside the lower part of engine housing so that the crankshaft would dip in it when it comes into lowes position and splash the oil. That way of lubrication is used in lot of 4 stroke engines too.

Next, I would have to solve valves. Head of the engine is removable too. I plan to install one-way valves, one into the sparkplug hole and to drill another one next to it and install second valve.

Basicly, this

https://ibb.co/4gJTmd4

What do you think, is it doable? I googled and found that many people do this but with 4 stroke engines, found nothing about using 2 stroke angine as compressor.

[Bengt Erik Eriksson]

Nice to hear that you are alright! Hope it keeps that way..

is it really nessecary to plug anything? Just test wuth a checkvalve in sparkplug hole and se how it works. I see the problem would be lubrication but with a adjustable oil droping device in the inlet it maybe could work..

[Holger]

Yes, hoping for the best for you, you family and friends Selmir! Be cautious!

[busholle]

Never heard of a 2-stroke engine as a compressor but i have seen a Atlas-Copco that used a 8-cylinder engine that 4 cylinders was converted to compressor and the other 4 still served as diesel engine.

[fretchi]

Zdravo, Selmir!

it's one of the few words i learned when i visited bosnia a while ago.
I think it could work. As Bengt mentioned you maybe don't even need to plug the in/outlets. May reduce capacity though, but it's a lot easier to try it that way first.

[selmir_Bosnia]

Here you can see some pictures. Today evening i managed to dissasemble the cylinder head, you can see 4 ports on it. One is air/fuel inlet, one is exhaust outlet and two connect lower part of engine (below the piston) with upper part of the engine (above piston). I will plug the inlet port and exhaust port, that way I will get almost full volume (275ccm). Two ports that go from bellow and above piston I will block with custom made sheet metal plate you can see I made from cardboard (it is just for measure). If I do not do that, I believe that oil will gradually be sucked out. I am not certain about that to be honest.

I realised that I will have to make sure that crankshaft housing is ventilated, so that piston is not going to create pressure as it goes down, found a way to do it too.

This is definitely and completeyl one of the craziest things I ever tried to do.

[jörgen.ottosson]

Hi, Nice to hear from you, and to know that all is well so far.

I believe the challenge with using a tow stroke engin as an air compressor is lubrication. You need to come up with a way to mix oil with the intake air and then separate it from the compressed air, if you wants to use it for example to paint. ( impact tools, grinders ect will probably like the lubrication, but be prepared that they makes a oily mess when you are operation them. )

[selmir_Bosnia]

I though about pouring some oil inside the crankshaft case so that crankshaft wil splash it, like in small 4-strokes. What do you think about that?

Here is one from my office

[fretchi]

May be a problem since the crankcase volume is so small in a 2-stroke. No place for the oil to settle. You don't happen to have any lawn mower engine to use instead?

Would be much easier i think. Just remove the valves and fit a custom cylinder head on it,

[selmir_Bosnia]

I have one Briggs, from lawnmower. Carb is dead but engine might be usefull. It is horizontal engine, but electric motor tthat will power it can run that way i think. I am realising that 2 stroke might really be to hard to convert. Only option for lubrication would be some dripping system, it seems.