Model Engine Maker
Engines => From Plans => Topic started 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)
-
Watching with great interest.
Jo
-
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)
-
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.
-
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)
-
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)
-
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)
-
:thinking: :headscratch: :thinking: :headscratch: :smokin2: :noidea: By George! I think he's got it! :old:
-
;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.
-
I'm watching Tel! Can't see your last series of photo's thou. :noidea:
Dave
-
?? Which ones can't you see?
This was the last one
-
Your 4th and 5th post from the 19th of this month.....I can see the first 3 posts pictures.
Dave
-
?? Which ones can't you see?
This was the last one
Hadn't seen that one. Looks good. :ThumbsUp:
Jo
-
Looks really good. Interesting process and good use of a spent cartridge.
I don't see the pics in post 6 and 7.
-
Can you see 'em now Carl/Dave?
-
No
-
Bugger! I'll try to get 'em up on Photobucket again and repost the series!
-
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)
-
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.
-
Good thinking Carl - might try that for exp #2
-
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)
-
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
-
(http://smile-media-production-1.s3.amazonaws.com/images/f5351a30fbb4012f279d22000abc09d1/1350607853485.jpg)
That looks useful :naughty:. Still watching, looking very promising ;).
Jo
-
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)
-
Good stuff, Tel. Makes me want to build a table engine of some kind.
-
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
-
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.
-
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
-
Nicely done Tel. Looks well worth the effort!
-
: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
-
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.