I have some that have lasted six months, keep them warm and dry.Originally Posted by WilDun
I'll need two melts as one will be LM13 and the other CC601. I may need two CC601 melts yet, we will see, it's a resonable size pot.
Forum whore
I have some that have lasted six months, keep them warm and dry.
I'll need two melts as one will be LM13 and the other CC601. I may need two CC601 melts yet, we will see, it's a resonable size pot.
Muddler/Dabbler.
That's great, wasn't expecting they could be kept that long!
So it looks like I'll be going with the sodium silicate/co2 method then, as they should be fairly transportable and it means I can have them prepared the night before and not have to rush things, especially if I'm going to do the melting elswhere.
Now I have to get something unique designed, I'm hoping to be working on some of my dreams from the past which I never really did get sorted! - hope that idea doesn't just become a dream as well!
Forum whore
Drama, furness caught fire, on the out side, now I remember that I was going to change the plastic fuel feed pipe for a steel one. last time I used the furnace I had fuel line fire problems, with ethanol burning clear it can get a little out of hand before you get to see there is in fact a fire going on. This time the pipe actualy melted! CHANGE THE FUEL PIPE.
Anyway three out of four cylinders cast, one the side fell off the mould and the metal ran out. Can not have glued it together properly? I'm waiting for the molds to cool (having a beer) then I'll post pictures.
Forum whore
Success, three sound cylinders in LM13. One is the cylinder destined to run on the reverse cylinder EFI 360 engine. The other two are FOS type, 100cc, Potential for 58 HP @ 17100 rpm ?? Variable port height, both transfer and exhaust, we will see.
Forum whore
100cc .... I want one, pick me, pick me, please pick me.17K Plus rpm, whow what a Bucket race engine that would be.
No8 Wire Extraordinaire
Astounding Neil.
Don't you look at my accountant.
He's the only one I've got.
Hardcore Biker
Applause!
Very well done flettner.
Forum whore
A little bit of machining to clean the castings up. Enough left on the surfaces to finish machine after heat treatment plus a few o ring grooves to be installed. Also a small gear rack to be cut on the side of the cylinder (the lump cast in above one of the exhausts).
Muddler/Dabbler.
All excellent stuff - great pics! where do you get the energy? - all the little mysteries are beginning to become more apparent now, eg the little bar running up the side of the cylinder - I couldn't figure that out! (too scared to ask).
Well (I think) I can see that the FOS probably isn't a Ryger clone or a development of one.
I guess two heads (not cylinder heads) are better than one, so I'm guessing that the F.O. input is still very much there as well!- anyway, great pics!
Keep up the foundry lessons and we will all learn something!
Forum whore
The Zurg cylinder is more a Ryger development project but I've decided to work on more known tech at the moment. I understand the FOS so thought I would proceed with that at the moment. Although opposite to what Frits says I'm complicating it somewhat by moving the cylinder up and down on the fly (the rack and pinoin). There will be a stator machined into the bottom of the transfers (X6, a bit like a spline) where by as the cylinder moves the base of the transfers will stay fixed in relation to BDC, so the transfers will be nozzeled as the port heights reduce to try and keep gas speed up into the cylinder to keep the central plume intact.All excellent stuff - great pics! where do you get the energy? - all the little mysteries are beginning to become more apparent now, eg the little bar running up the side of the cylinder - I couldn't figure that out! (too scared to ask).
Well (I think) I can see that the FOS probably isn't a Ryger clone or a development of one.
I guess two heads (not cylinder heads) are better than one, so I'm guessing that the F.O. input is still very much there as well!
Keep up the foundry lessons and we will all learn something!
In the mean time I've had more thoughts on the Ryger and have come to the conclusion that the FOS might make a real nice base for a Ryger test cylinder. A modified version with the same exhausts but different transfers and a tight crank case pump. The Ryger uses the tight crank case pump AND open straight though ports. The transfer ports are double action both piston ported to this tight crank case (short piston), at TDC AND straight through at BDC. There is a reed in the transfers but it's also a diversion valve. Will shut off either straight in port or transfer port depending on the pressure it "sees". Sprung to shut the crank case transfers normaly, as the transfers open the high pressure port wins and out shoots a charge but not much volume, as pressure drops the reed will shut and the chamber will start its normal action with some help (augmentation) from the initial high pressure shot, now drawing straight from the carb. This system automaticly adjust for cylinder pressure, so blow down is no longer a problem. The 30mm carb "sees" draw at both top and bottom stroke, double time, with the piston porting setting up a sharp induction wave to help (this could be set to be most efficent at perhaps the time between 13500 to about 15500 when the chamber is out of phase?). As the engine increases in speed (chamber and exhaust outlet are the same size as normal) the pressure inside must increase so I would imagine the wave action would become more savage (energetic) and work much harder than normal, above normal speeds.
In the Ryger type cylinder I have on the bench (pattern) it will not move up and down as it won't need to. It's got three carbs, six transfers, and six reed petals, and a special crank (not see here yet). I'm not so sure about the beem crank now although it might be good for lower speed testing?
Muddler/Dabbler.
Just joined the thread again so haven't read it all carefully as yet, but seeing as you are going to have a moving cylinder using a rack and pinion which will no doubt be driven by a stepper motor, is a rack and pinion suitable? - Why not a screw, which isn't as high geared and more able to cope with forces involved ? - I guess the cylinder will possibly only be moving 2mm at most.
I'm guessing (hoping even) that the cylinder will somehow be able to move independently to the head, otherwise the compression ratio will be altered as well and of course, your little rack/pinion/stepper will become highly stressed indeed, being subjected to compression forces as well!
As always you need to be gentle with your reply - I'm a very sensitive soul and not capable of handling scorn!
Forum whore
Yes you are right, perhaps a screw will do. I did think I was changing hight of the cylinder as much as 9 / 10mm.Just joined the thread again so haven't read it all carefully as yet, but seeing as you are going to have a moving cylinder using a rack and pinion and no doubt being driven by a stepper motor, is a rack necessary? why not a screw which isn't as high geared? ie. seeing that the cylinder will be possibly only moving 2mm at most.
I'm guessing (and I mean only guessing) that the cylinder will be moving independently to the head otherwise compression will be altered as well and of course your little rack/pinion/stepper will become highly stressed indeed!
As always you need to be gentle with your reply - I'm a very sensitive soul and not able to handle scorn!
Yes the head is bolted to the outside water jacket so the combustion loads are between the head / water jacket and the crank case, cylinder free to move indepedently. Hey who knows, lets have a hack at it and see.
Besides, having a gear hobb says I want gears!
Forum whore
[QUOTE=WilDun;1130922326) where do you get the energy? [/QUOTE]
See what no TV can do for your life!
Muddler/Dabbler.
Yeah, suck it and see! but I was really just thinking out loud, however I sure didn't think the cylinder would be moving that far!
I must have missed out somewhere in keeping up with info on the Ryger, perhaps I didn't keep on digging enough, so it's still a bit of an enigma to me.
I do have a few thoughts on it's general arrangement but that's as far as I've got, doubt if I'll ever try to produce one! - still, very interesting.
Will still try to persevere with my foundry work though and who knows what will happen - keep going and I'll try to keep learning!
Seldom watch TV (I just go to sleep instead!) and not watching it still doesn't do anything for my energy levels!
Forum whore
With a rack and pinion driven by a stepper motor, the motor must constantly be powered in order to keep the cylinder in position.
A screw, i.e. a worm wheel drive, is self-locking, so the forces acting upon the cylinder will not act upon the stepper motor, so the motor can rest now and then.
TV is an invention of the devil; Facebook is even worse. And what about forums ?
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks