Making a Flame Licker Engine "Marc" by Jan Ridders Part 11 - Piston & Fork
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- čas přidán 6. 09. 2024
- We are nearing the end of the manufacturing stages on this engine now. This is the last key critical sub assembly as we get the piston made.
Channel artwork: Ryan Toomey
Really nice work Jon... I must admit I was surprised to see an exponent of balanced cuts using wet and dry - LOL...
Hi Paul, thanks for the comment. Yes, on editing I realised I did a crap job of explaining why! The whole reason was to ensure that the final piston O/D surface was free from any machining marks in the hopes of a better vacuum potential meaning more chance of actually getting this to run (they are incredibly inefficient). I will pin your comment in the hopes others see the response. Cheers, Jon
A little trick to help collect the chips while keeping stuff clean is to put a pair of women's stockings in the end of your shop vac hose, and hold it in place with a rubberband over the mouth of it. When you suck up the chips, they get caught by the stockings, and dont go into the shop vac, and is easy enough to dump them back out afterwards.
Chirpy's Tinkerings, I agree as I have used a similar method. The only different thing was I used a Hanky, Snot rag you know and it worked fine.
Cheers from John, Australia.
Hi Chirpy, thanks for the comment and suggestion. I will have to remember that, great idea. Cheers, Jon
@@joandar1 hi John, I think a snot rag might be a safer option, just in case Mrs Jon's Workshop comes in to see me, would take much less explanation lol lol. Cheers, Jon
That's a very interesting way to connect the rod to the piston. It makes things a lot easier to make. Never seen that before.
Hi Rusti, thanks for the comment. Yes, my thoughts too. I don't think it would be robust enough for an IC engine but clearly works in this design, very clever and simple solution. Cheers, Jon
Looking great. Awaiting with baited breath for the final assembly & run. Fantastic content as always.
Steve.
Hi Steve, thanks for the comment. Me too lol, on the home straight now, hopefully in the next couple of weeks or so we will be on final assembly. Cheers, Jon
Gday John, beautiful fit and finish on the piston, it’s very satisfying when it all goes to plan, great job as always mate, cheers
Hi Matty, thanks for the comment and sorry for the delay responding. Hope you are well mate. Cheers, Jon
Great outcome Jon. A good engineering practice is that if the part has sufficient depth, drill the part with the clearance size of the screw down to 1.5 to 2 thread pitches, then drill and tap the rest. The reasoning behind this is threefold, firstly it gives the part a nice clean edge to take an edge break, secondly it allows the screw to auto start as it drops into the threaded hole: lastly it prevents any mating surface not to lay flat if the thread should pull up when tightening. Gear boxes and car cylinder blocks are done this way, so the mating surfaces are fully together when the bolts are tightened. Looking forward to see it running. Regards from Australia.
Hi Dave, thanks for the comment and tips. You wouldn't believe I have programmed this many many times in the past in industrial CNC would you. In recent years it has just gone from my mind so thanks for the reminder. I must try to remember this as it is good practice. Cheers, Jon
Hi Jon, a good test of the piston to bore fit is to see if it will stay in position or only very slowly move, with the cylinder sealed at the compression end with your hand or some such. The vacuum should hold it in position or seriously slow it's movement. You don't want any binding with flame lickers as they are very low power devices. The piston should still be able to slide out under it's own weight with the cylinder ends open. That's how I gauge it anyway ;) Cheers Rob
Hi Rob, thanks for the comment. Since filming this I have done a little more surgery to the piston, it had actually gone very slightly out of round on the skirt end, must have been stress relief when I parted it off the stock. The tighter spot caused by this has now gone, and the piston falls right through the bore now under its own weight. I have still to do the compression test which I will do on assembly. Cheers, Jon
Looks excellent.
Good day Jon
Hi Kimber, thanks for the comment and feedback, much appreciated. Cheers, Jon
Nice fit Jon, I think that will run really well.
Best wishes, Dean in Oxfordshire.
Hi Dean, thanks for the comment, ha Haa, I hope so. Cheers, Jon
Thanks Jon, that was really good.
Hi Carl, thanks for the comment, just catching up lol. Cheers, Jon
Rite Jon Dude, didn't realise the cylinder head was that big, looks a bit of alright! Can't wait to see the final assembly :) Was like look @ all that lovely brass I hope you ain't just gonna brush it away lol, as always Dude take care n stay safe you and fam! TFS, GB :)
Hi Graeme, thanks for the comment. Lol, it's in the bag (the brass I mean, not so sure on the engine). Lol. Cheers, Jon
Great fitting piston , almost sexual as John Mills would say !!!
Hi Max, thanks for the comment. Lol, I can hear him saying that in my mind now. Cheers, Jon
another good one mate. Should be done soon
Hi Dermot, thanks for the comment. Yep, another couple of weeks and we will be either celebrating huge success, or admiring a pretty paper weight lol. Cheers, Jon
Nice work. I hope that drag on the piston in the bore doesn't cause a problem. I for on am looking forward to you getting it running...good luck
Hi Ian, thanks for the comment. I subsequently removed the tiny drag spot and there is a follow on story quite related lol, all to be revealed very soon. Cheers, Jon
nice fit, you'll need to block the ports and make the popping sound withdrawing the piston
Hi Gr eg, thanks for the comment. Lol, I will definitely be having a play on final assembly once the head is refitted. Cheers, Jon
What a nice fit ! Great work.... learned a lot as always ! Thanks for another informative Episode!
Cheers
Chris
Hi Chris, thanks for the comment and feedback. Much appreciated mate. Cheers, Jon
Nice job Jon, I can see a V8 build on the cards 😉
Hi Terry, thanks for the comment. Lol, not sure I have the patience for one of these yet, struggling to get to the end of a single lol. Too many new toys to play with causing distraction lol. Cheers, Jon
Fantastic Jon. Really enjoy following from afar and seeing the progress. Looks strange having mic's with no wee yellow stickers on them!
Hi Fraser, thanks for the comment and support mate, much appreciated indeed. Look after yourself buddy. Cheers, Jon
Looks good 👍👍👍
Hi Steve, thanks for the comment and feedback, much appreciated. Cheers, Jon
Hi Jon, Another great piece of work but I am shocked that you can afford to have the heating on !!!!!!!! lol
Hi Del, thanks for the comment. Lol, I can't with the amount of money I have been spending recently lol. Joking aside, the oil heater although noisy, is a massive improvement in the workshop, worth every penny, and because we have oil central heating in the house, it's about 50% cheaper than diesel so it's pennies to run really. Cheers
first class
Hi Graedon, thanks for the comment and feedback. Much appreciated. Cheers, Jon
The tapping op in the top of the rod sounded, according to my cat, like a mouse.
Hi Jim, thanks for the comment. Lol, sorry if I sent your cat mad lol. Cheers, Jon
Nice one Jon
It's looking great, soon be fired up now, will the heat effect the loctite in the piston screw or won't it get that hot. Just a thought!!
See you next time
Take Care
Kev
Hi Kev, I am also concerned about this. I am following the plans almost to the letter and that's what it calls out. I have seen a few of this engine built and running on YT so I am guessing / hoping it is not an issue. If it is, I might use a dab of high temperature silicone instead. Cheers, Jon
Hi Jon. Is your external polishing the same as internal honing on engine cylinders? Does the piston expand quicker than the bore when working?
Just a query as there is no piston rings. You just answered my question at the end lol. Enjoyed the machining. Tony
Hi Tony, thanks for the comment. I honed the bore in the end, and finely polished the piston so they are both like glass. Still waiting to find out on the expansion lol. Cheers, Jon
How did yo make the springs?did you just bend them around a bit if material in the vice?
Hi Jason, yes, just cold bent in the vice, thanks for watching.
Loctite degrades in heat so I am surprised it is being used in this application.
Hi Mark, thanks for the comment. Yes, I have the same concerns. As this is my very first engine build, I am following the plans (almost) religiously and that's what they call out for this part. Hopefully it's not an issue but if it becomes one, I will probably use a dab of high temperature silicone instead which I reckon will do the job. Cheers, Jon
Looks like a great fit Jon, shouldn't be any problem with getting this to run.
Hi Jim, thanks for the comment and feedback, Mmmm, all to be revealed very soon lol. Cheers, Jon