Recent Posts

Pages: [1] 2 3 ... 10
1
Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 10:31:47 PM »
Oh, and for those of you who know me, you know I can't just be working on one project at a time! I've had this one on the back burner for a while, finally got enough knowledge put together to attempt it: another RC submarine project, this time it is another 'biologic' sub, a green sea turtle! I got the idea from one of the Nature episodes on PBS, where they used remote operated animals with cameras in the eyes to do research on animals in the wild. One of them was a sea turtle that swam around with dolphins and such, it made me think that something simaler would be a really fun model. So, I learned a bit more about moldmaking and the newer rubber compounds for flexible flippers/etc, and made some wire-controlled animitronic prototypes. So far I have the shell and head carved up from wood, still getting that sealed up and smoothed out, and just cut the blanks for the flippers. The head and tail will flex side to side as it steers, the flippers will flex up/down to act as dive planes, and there will be a pair of propellers in kort nozzles set back beside the tail for propulsion.

Here is a picture of the parts so far. In front is the small plastic turtle I found at the zoo shop this past summer, used it as well as photos for the proportions of the model.


Now, back to carving out the form for the Marion bucket!
2
Tooling & Machines / Re: High speed drill attachment for lathe
« Last post by Doc on Today at 10:11:55 PM »
2nd installment in high speed drill attachment for the lathe. Cutting holding cup, drill  and boring tail stock Morris taper blank. Just waiting fr drill chuck to arrive.





<a href="http://www.youtube.com/watch?v=edz2SWWo1to" target="_blank">http://www.youtube.com/watch?v=edz2SWWo1to</a>
3
Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 09:57:49 PM »
I have all the views for the model-sized version of the Marion shovel laid out, still need to add the dimensions to everything. In order to get started cutting metal (finally!) I am going to work on that in the background, while starting work on the dipper bucket. That should make a nice piece to have sitting with the parts as they get made.

The bucket shell was a large casting in the original, I think that I am going to make a wood form and bend some sheet copper over it to make the shell. Or maybe some annealed brass bar? Have to make a test, see if the brass will take the bends or not. The shell is 5/32" thick, seems like the brass would take a tight bend that thin (probably in a couple of annealing steps), but if not I know the copper will do it.
Got the plan sheets dimensioned up for the dipper, and also checked the metal stock - have some copper sheet left over from boiler work that will work out fine, the wide brass bar I have is a bit thick, and I don't think it will take these tight bends as well, so am going to use copper for the shell and brass/steel for the rest. First I need to do some wood work and make the form to bend the shell around...
4
Your Own Design / Re: 20 cc Horizontal 2 Stroke Diesel
« Last post by Brendon M on Today at 09:26:07 PM »
Thank you Roger, that thread was very informative.

I do have one more question. Part of the reason I asked was I reckon I have the same rotary table. How do you find it's accuracy? Good enough to just bolt the adapter on, or do you do some sort of adjustment to true it up?
5
Your Own Design / Re: Model Compressor---Maybe
« Last post by Brian Rupnow on Today at 09:21:28 PM »
Here is the "running in" video.
6
can you not rig up a small motor to turn it over? or maybe a cordless drill a simple rubber wheel could be a friction drive?


might need three hands for that idea though :headscratch:

Thanks Bertie, I have actually considered doing that  :)

It would be a temporary arrangement just so I could see it run once, but maybe worth a try. I think as others have said it needs drain cocks so I'm going to have to do that ultimately.
7
From Plans / Re: Vince's version of the Monitor Steam Engine
« Last post by vcutajar on Today at 08:07:46 PM »
Thanks Tim.

Vince
8
can you not rig up a small motor to turn it over? or maybe a cordless drill a simple rubber wheel could be a friction drive?


might need three hands for that idea though :headscratch:
9
Vehicles & Models / Re: Chris's Marion 91 Steam Shovel
« Last post by crueby on Today at 08:02:21 PM »
I have all the views for the model-sized version of the Marion shovel laid out, still need to add the dimensions to everything. In order to get started cutting metal (finally!) I am going to work on that in the background, while starting work on the dipper bucket. That should make a nice piece to have sitting with the parts as they get made.

The bucket shell was a large casting in the original, I think that I am going to make a wood form and bend some sheet copper over it to make the shell. Or maybe some annealed brass bar? Have to make a test, see if the brass will take the bends or not. The shell is 5/32" thick, seems like the brass would take a tight bend that thin (probably in a couple of annealing steps), but if not I know the copper will do it.
10
Your Own Design / Re: Bugatti Typ 50 1/4 Scale model
« Last post by BillTodd on Today at 06:09:20 PM »
I've a couple of short lengths of bar stock (25mm diameter approx 70mm long) that you could probably quarter and turn , but I'll check at the works for something easier to work .

send me an address via pm (don't worry about postage)

Bill
Pages: [1] 2 3 ... 10