Model Engine Maker

Engines => From Plans => Topic started by: tel on October 19, 2012, 09:21:38 AM

Title: Experiments with capitals for the S&P beam
Post by: tel on October 19, 2012, 09:21:38 AM

OK, despite sticking my face out and claiming the 30-06 case would be a good starting point, a quick look this morning didn't turn up any at all (though I know I have some) .... so, a minor change of plan - found heaps and heaps of 308W (7.62 NATO) so, for the first try we will use those.

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1597;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: Jo on October 19, 2012, 09:35:41 AM

Watching with great interest.

Jo

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 19, 2012, 09:43:19 AM

Oops - a bit of resizing in order. Having problems with my photo hosting service - attachments for the time being I'm afraid.

Step 1; turn away the extractor groove in the bottom of the case and drill what is left of the flash hole out to 6mm.

Step 2; trim the case body down to 25mm length

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1599;image)

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1601;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 19, 2012, 09:46:06 AM

Step 3; divide a portion of the case (20mm from the open end) into 8 more or less equal segmants

Step 4; cut these segment lines with a Dremel cut-off wheel

Step 5; gently flare out the segments with a pair of long nose pliers.

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 19, 2012, 09:50:39 AM

Step 6. The insert was turned (reasonable fit inside case) from a piece of 20mm square brass.

Step 7; ... and shoved into the case, seated home with an M6 bolt and nut.

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1607;image)

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1610;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 19, 2012, 09:52:24 AM

Right way up! Ready for trimming and shaping of the 'petals' - gonna all be hand filing I suspect.

Watch this space.

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1611;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 02:21:22 AM

A long way short of perfect, but on the right track, I think.

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1614;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: Captain Jerry on October 20, 2012, 02:39:47 AM

 :thinking: :headscratch: :thinking: :headscratch: :smokin2: :noidea: By George! I think he's got it! :old:

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 08:44:51 AM

 ;D Well, getting somewhere near it. Now I need to try one with some decent set-ups for the cutting and shaping - that was just knocked out more or less freehand.

Title: Re: Experiments with capitals for the S&P beam
Post by: steamer on October 20, 2012, 10:47:37 AM

I'm watching Tel!   Can't see your last series of photo's thou. :noidea:

Dave

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 11:09:05 AM

?? Which ones can't you see?

This was the last one

Title: Re: Experiments with capitals for the S&P beam
Post by: steamer on October 20, 2012, 11:53:26 AM

Your 4th and 5th post from the 19th of this month.....I can see the first 3 posts pictures.

Dave

Title: Re: Experiments with capitals for the S&P beam
Post by: Jo on October 20, 2012, 04:59:35 PM

Quote from: tel on October 20, 2012, 11:09:05 AM

?? Which ones can't you see?

This was the last one

Hadn't seen that one. Looks good. :ThumbsUp:

Jo

Title: Re: Experiments with capitals for the S&P beam
Post by: zeeprogrammer on October 20, 2012, 05:22:13 PM

Looks really good. Interesting process and good use of a spent cartridge.

I don't see the pics in post 6 and 7.

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 08:52:05 PM

Can you see 'em now Carl/Dave?

Title: Re: Experiments with capitals for the S&P beam
Post by: Jasonb on October 20, 2012, 08:55:13 PM

No

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 08:58:57 PM

Bugger! I'll try to get 'em up on Photobucket again and repost the series!

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 09:13:52 PM

OK, trying again (sorry about this folks)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1a.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1b.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1c.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1d.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1e.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1f.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1g.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1h.jpg)

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital1i.jpg)

Title: Re: Experiments with capitals for the S&P beam
Post by: zeeprogrammer on October 20, 2012, 09:31:55 PM

Looks really interesting Tel.
Seems like with a profiled inner, the leaves would/could lay against it and look nearly 'embossed?' or as a single part. Thanks for showing.

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 20, 2012, 09:34:13 PM

Good thinking Carl - might try that for exp #2

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 21, 2012, 02:19:34 AM

Exp #2 has commenced. First, the recipe as before - turn and trim the case to length.

Second, dig this doohickey out of the drawer and set up the Dremel for a bit of controlled movenement.

(http://smile-media-production-1.s3.amazonaws.com/images/f5351a30fbb4012f279d22000abc09d1/1350607853485.jpg)

Third, slit the case. This time I also managed to remove a bit of the excess material with a bit of manipulation. Now to knock up some sort of profiling tool.

(http://www.modelenginemaker.com/index.php?action=dlattach;topic=854.0;attach=1632;image)

Title: Re: Experiments with capitals for the S&P beam
Post by: Pete49 on October 21, 2012, 03:37:07 AM

Just watching for a chance to learn some more and OH NO another tool to make. Guess when her indoors gets into me for time spent in the shed the name Tel will come up....he's too far away to listen to her  :lolb: I am learning and will keep watching
Pete

Title: Re: Experiments with capitals for the S&P beam
Post by: Jo on October 21, 2012, 08:00:29 AM

Quote from: tel on October 21, 2012, 02:19:34 AM

(http://smile-media-production-1.s3.amazonaws.com/images/f5351a30fbb4012f279d22000abc09d1/1350607853485.jpg)

That looks useful :naughty:. Still watching, looking very promising ;).

Jo

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 23, 2012, 04:31:11 AM

OK, the body needs to be a bit shorter, the slots not quite as deep and a bit better shaping up of the 'leaves' but this is getting very close to a capital that I could live with.

(http://img.photobucket.com/albums/v332/laneranger/S%20and%20P%20Capitals/capital2c.jpg)

Title: Re: Experiments with capitals for the S&P beam
Post by: Captain Jerry on October 23, 2012, 04:45:57 AM

Good stuff, Tel.  Makes me want to build a table engine of some kind.

Title: Re: Experiments with capitals for the S&P beam
Post by: Jo on October 23, 2012, 07:57:56 AM

Looks like you have a solution for the smaller engine :whoohoo:.

Next challenge: for the 1/6th there should be diamonds between each leaf :LittleDevil:.

Jo

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 23, 2012, 09:12:18 AM

My brain hurts when I even consider those diamonds. The only viable thing I have come up with so far is to shape the heads of shortened escutcheon pins and loctite 'em into drilled holes. However, that might not be possible with my #3 - which will be done in 4 pieces, rather than the 3 we have been using thus far.

BTW, these are roughly the size for the 1:6 jobby, with the .308 cases, for the 1:12 you would need to use something like .22rf and a fine slotting saw.

Title: Re: Experiments with capitals for the S&P beam
Post by: Jo on October 23, 2012, 12:00:38 PM

Quote from: tel on October 23, 2012, 09:12:18 AM

BTW, these are roughly the size for the 1:6 jobby, with the .308 cases, for the 1:12 you would need to use something like .22rf and a fine slotting saw.

My supplier still has not come up with the cartridge cases to make these :ShakeHead:.If I am still in need when I get there I might try some tin brass tube. I have a nice 20 thou slitting saw ;)

Jo

Title: Re: Experiments with capitals for the S&P beam
Post by: zeeprogrammer on October 23, 2012, 12:10:11 PM

Nicely done Tel. Looks well worth the effort!

Title: Re: Experiments with capitals for the S&P beam
Post by: jonesie on October 23, 2012, 03:24:58 PM

 :ThumbsUp: tel that is a nice idea for the capitals, i do not think it will take much with a small burr in the dremel and a little filing with some small file and you will have a good looking capital. looks real good.  jonesie

Title: Re: Experiments with capitals for the S&P beam
Post by: tel on October 23, 2012, 08:17:10 PM

Quote from: Jo on October 23, 2012, 12:00:38 PM

My supplier still has not come up with the cartridge cases to make these :ShakeHead:.If I am still in need when I get there I might try some tin brass tube. I have a nice 20 thou slitting saw ;)

Jo

Let me know if you need some - I have heaps of 'em.