Webster Engine

[65arboc]

Ok, I'm back at it. Had to make a new piston as I cut the ring groove too deep in the original one. I always seem to go to far with my cuts:wall:So four hours later it is done with the proper groove depth and ready to drill for the wrist pin. This is where I always have trouble getting the 3/16" reamed hole in the exact placement and true through the piston. I have a good v block and a very accurate mini drill press but I can't figure out how to drill the hole exactly 90 degrees of the milled out area inside the piston. Brian, can you explain how this is done or anybody else please.


Thanks,

Jim

 

[canadianhorsepower]

This is where I always have trouble getting the 3/16" reamed hole in the exact placement and true through the piston. I have a good v block and a very accurate mini drill press but I can't figure out how to drill the hole exactly 90 degrees.
Thanks,

Jim

this should help you
good luck

 

[Brian Rupnow]

65arboc---I covered that exact thing in my ongoing thread about my 2 cylinder i.c. engine. You can start by looking there.--However, the information there is probably too late to be of any use to you now. So---the piston you currently have has a slot where the connecting rod small end fits into, right. Mill a piece of aluminum that is a "snug" fit into the slot, and make it long enough that it extends out beyond the piston skirt about 1". Now you have a "witness surface" to set your level on, at 90 degrees to the long axis of the piston.. Clamp the piston in the v-block, set the v-block on the surface of your mill or drill press, loosen the clamp off just enough to rotate the piston with your fingers until the level reads, well---level. Then retighten the clamp and drill the hole.---Brian

 

[Charles Lamont]

I can't figure out how to drill the hole exactly 90 degrees of the milled out area inside the piston

Do it the other way round? I make the gudgeon pin hole (drilled, bored, & reamed) and the set up in the milling machine using a long pin through the hole to line it up for milling the recess. I have hastily put some photos up here:
http://www.charleslamont.me.uk/Seagull/pistons.html

 

[65arboc]

65arboc---I covered that exact thing in my ongoing thread about my 2 cylinder i.c. engine. You can start by looking there.--However, the information there is probably too late to be of any use to you now. So---the piston you currently have has a slot where the connecting rod small end fits into, right. Mill a piece of aluminum that is a "snug" fit into the slot, and make it long enough that it extends out beyond the piston skirt about 1". Now you have a "witness surface" to set your level on, at 90 degrees to the long axis of the piston.. Clamp the piston in the v-block, set the v-block on the surface of your mill or drill press, loosen the clamp off just enough to rotate the piston with your fingers until the level reads, well---level. Then retighten the clamp and drill the hole.---Brian

Thanks Brian, my problem is I don't have clamping v-blocks but your method is excellent.

 

[65arboc]

I took Brian's advice and milled a piece to fit in the piston. Now I just need to get a v-block with a clamping device. I work part time at a hi end machine shop so maybe I can borrow one. I'll be back.

Jim

 

[65arboc]

Made a new piston and grooved it for an o-ring, put it back together and it ran first start up. After a while of running it even started with just a flip of the flywheel. I am so excited as I have been working on this for so long I almost gave up. The answer was not enough compression. It would fire with the drill running it but not on it's own. I took a video but don't know how to upload it so you guys can't say no vid, no proof. Thank you everyone who gave me encouargement to get this running. You are a great bunch. Now maybe I can get back to the Kerzel hit -miss and get it running. I suspect the problem there is also compression. I'm Stoked!!!

Jimwoohoo1woohoo1woohoo1woohoo1

 

[GailInNM]

congratulations Jim,
Thm:Thm:Thm:
It's a great feeling on the first successful run of an engine.

Now you know what it's supposed to feel like when you turn the engine over my hand the Kerzel will go much easier. Nothing like a little experience as to how it should feel to aid the troubleshooting.

If you have troubles posting the video, I or many others will be glad to walk you through it.

Gail in NM

 

[10K Pete]

Jim, that's great news! I'm looking forward to doing that myself, hopefully
this year.

Great work! Looking forward to your Kerzel build log!!

th_wav

Pete

 

[Brian Rupnow]

Jim---wonderful!!! now you need to get in contact with Simister in Australia.--he has just finished a Webster, and is starting to build the Kerzel.---To post a video, go to Youtube and start a free account. They will let you upload video's and you can post the link here.---Brian

 

[bmac2]

Great stuff Jim ;D
Congratulations on a runner! Can’t wait for the video. Thm:

 

[65arboc]

I can't seem to get the video on youtube. Need some help please.

Thanks

 

[Brian Rupnow]

First take a video. Download the video to a place you can find on your computer. Open Youtube and register as a user, by creating an "account" (it's free). Go to "my channel". Find the button that says "upload". When you click this button it will ask you to direct it to the video you have saved. (Thats why you must know where you stored it on your computer) Go to it and double click the icon. this will start your upload to youtube. It will also have a couple of blanks where you can type in what the video is about. Your upload can take up to 15 minutes. when it is finished uploading, the "thumbnal" photohraph will fill in and show the first image in your video. then click on "publish" This will start your video playing. While it is playing, right click on the address bar at the very top of your screen and when it turns blue, hold down the control button on your keyboard and press the letter c one time. You have now copied the link to your video. Open the forum, go to your thread and post a message. Right click in the message you are typing and press down "control" on your keyboard and press the letter v one time. That will post the link.

 

[65arboc]

https://youtu.be/qZy9iycZqEQ

Thanks Brian, hope this works!

 

[65arboc]

yahoo, it works! What a great feeling to accomplish this! Thanks to everyone who helped.

 

[10K Pete]

And it runs very well! Excellent. Congratulations!!

woohoo1

Pete

 

[Brian Rupnow]

And it's a lovely engine indeed!!! Congratulations.---Brian

 

[Swifty]

Thought that this may help, saves opening up your link.

[ame]https://www.youtube.com/watch?v=qZy9iycZqEQ&feature=youtu.be[/ame]

Paul.

 

[65arboc]

And it's a lovely engine indeed!!! Congratulations.---Brian

Brian,

Thank you for your kind words but it's not as nice as I wanted it to be. I have messed with it so much that like me it has joint problems here and there but instead of stiffness it has the opposite! Also all I had for the base was a piece of scrap that someone practiced on the back with a CNC machine. Before I show it to anyone but you guys I'm going to refine it a bit. I've ordered a new base from Speedy and will probably make new side frames. About the only pieces I wont re-make are the cylinder and Head as I'm happy with them both.. I'll be back on here again after I get it all refined and "lovely" and it's joints repaired!

Jim

 

[65arboc]

Thought that this may help, saves opening up your link.

https://m.youtube.com/watch?v=qZy9iycZqEQ&feature=youtu.be

Paul.

Thanks Paul but what do I do with it?