Project of the Month built by driller1432

Help Support Home Model Engine Machinist by donating using the link above or becoming a Supporting Member.
Home Model Engine Machinist > Showing Them > A Work In Progress > 1/5 scale Bristol Centaurus

Thread Tools
Old 03-23-2017, 10:38 AM   #11
Join Date: Sep 2007
Location: West Cork
Posts: 931
Liked 159 Times on 128 Posts


You obviously have access to some good tooling at school. School must have plenty of spare funds (!) so why not persuade them to invest in something like
There are other companies that have similar tooling but you'll get the idea.

Great progress you are making, by the way.

The Emerald Isle

deverett is offline  
Reply With Quote
Old 03-28-2017, 03:10 PM   #12
Join Date: Feb 2017
Posts: 5
Liked 12 Times on 3 Posts


Back at it again, had a few days off school last week but full steam ahead this week. I've started on my cylinder heads now as I'm waiting on tooling to finish up the cylinders, you can see the rough blanks have been cut and faced. They're a very simple design because of the valveless head. You can see here in the drawing (head is in purple) it's basically just a large step turned with the glow or spark plug thread in the center, and the 4 head bolt holes. There is a small groove at the bottom you can see and this is actually for a piston ring, because of the moving sleeve valve which is also the combustion chamber the sleeve needs to seal both on the piston and the head; Therefore it has rings on the piston and on the head that protrudes into the cylinder. I said earlier glow or spark plug because I've allowed room for either but haven't quite decided yet. It has an 8:1 compression ratio so i think should work good with gas or glow and there is a place and optional drive for distributors on the back I'm just still working out if spark is worth the extra time i don't really have

Attached Thumbnails
20170328_111323.jpg   20170328_111707.jpg  
EthanHopper is offline  
michael-au Likes This 
Reply With Quote
Old 03-28-2017, 08:20 PM   #13
Join Date: Mar 2014
Location: Gold Coast, Australia
Posts: 188
Liked 207 Times on 84 Posts
Likes Given: 45


I think your work extremely good, as for the fins, have you thought of using a hacksaw blade. Grind the end to shape. I don't imagine you would be going in to any great depth and would give a nice thin groove.

deeferdog is offline  
Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
1/8 scale Associated rodue Finished Projects 0 11-02-2015 05:54 PM
1/10 SCALE V8 schmetty A Work In Progress 5 08-05-2011 08:00 AM
Reid 1/4 scale mikes01cobra Engines From Castings 4 03-06-2011 07:05 PM
Greetings from Bristol Connecticut Bill Gruby Introduction 27 02-18-2011 10:49 PM
Scale Hardware is the U.S.'s best source for scale model fasteners. PTsideshow The Break Room 21 05-21-2008 12:57 PM

Newest Threads

- Top - Member List