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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by Dave Otto on Today at 04:07:51 PM »
Nicely done Kim!


Dave
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From Plans / Re: Upshur, First IC Engine
« Last post by b.lindsey on Today at 04:01:48 PM »
Nice start sleddog!!! It's great to see a couple of new builds starting off too and I look forward to following along  :popcorn:

Bill
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Your Own Design / Re: Back to Steam
« Last post by Brian Rupnow on Today at 03:58:14 PM »
So, very carefully the bushings are turned on their stub mandrels and fitted to the aluminum base. The bushings are all currently reamed to 0.281" during this first operation. A bit of experimenting shows that a 0.281" reamer will pass thru all three bushings after they are installed in the base without wanting to take any large amount of bronze of any of the three bushings, which is very encouraging. The next stunt is to take my 0.311" reamer and take a complete pass thru all of the bushings with it, watching very closely to make sure that the reamer is not being pulled "out of position" by any radically "out of alignment" holes. This seemed to go very well, so now I move up to the final size 0.3125" reamer and slowly run it thru all three bushings. Now for the big test---does a 0.3125" shaft fit thru all three bushings?  This is not guaranteed, because if any one bushing was too far out of alignment, the reamer would be quite happy to follow the out of alignment hole. Reamers will not straighten or "true up" a misaligned hole. They are more flexible than you would ever believe.  Luck was with me!! A 5/16" shaft does fit thru all three bushings.--a bit reluctantly, but only a bit, and it can be turned when in place. Before I go any farther with things now, I will mount the base to my work-bench, put an 8" v-pulley on the shaft, and after a liberal application of oil I will drive the shaft for an hour with my old half horsepower bale elevator motor. this will take any "stickiness" out of the bushings and should let a shaft rotate very freely, which is what I am aiming for.

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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by crueby on Today at 03:55:53 PM »
Oh no, shallow hole. On the cross tube type, the steam tube runs through the top of the oil reservoir, so all you need is a single hole through the top of the tube wall, just the thickness of the tube wall. That acts as the restrictor. In the attached picture the tiny hole is the white bit in the tube, just under the filler cap.
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From Kits/Castings / Re: Vulcan Beam Engine - AJ Reeves Castings
« Last post by Emelbe on Today at 03:51:05 PM »
Hi,

Thanks for the replies already.

Let us begin!!!  Firstly I have to say AJ Reeves are a pleasure to deal with.  I ordered the kit by phone and it was with me within three days, Jersey is a bit like the back of beyond when it comes to getting things! There were three castings missing but this was duly noted on the invoice with to follow FOC.  I wondered how many companies would have waited until they had the castings before they sent everything to save the extra postage?  There were a couple of problems with two of the castings, the beam and one of the standards, and also they charged me VAT (Value Added Tax) which we don't pay here.  A quick phone call and this was refunded and they said to return the casings and they would be replaced. Within the week they had arrived and a day or so after the missing castings arrived.

The castings are Gunmetal which was a welcome change from the Stuart Cast Iron (no black dust everywhere). The quality of the castings aren't the best, they are quite rough and the guy who fettles them at the foundry makes the Texas Chainsaw Massacre look like a brain surgeon!! Also some of the castings are fairly close to the bone dimension wise and don't leave a lot to play with.

Ah well, if it were easy anyone could do it, time to settle down with the Dremel and lets get them fettled and primed before I start some machining.  After a week or so and all of Season 3 of Narcos on Netflix I was about ready to make a start on machining the castings and I can start posting some pictures of the results.
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From Kits/Castings / Re: Vulcan Beam Engine - AJ Reeves Castings
« Last post by Jo on Today at 03:35:47 PM »
Looks like you are doing well on your beam engine Martin  :)

Jo
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Vehicles & Models / Re: Steam Tractor 3/4" (Rudy K)
« Last post by Kim on Today at 03:34:43 PM »
Thanks Bill!

Yup, the hole does want to be that small. In the inline lubricator style it is usually 3 more drill sizes smaller than yours. Too big and it pumps in to much oil.
Yikes!  I wasn't sure I was going to survive that #72 hole!  Going to something smaller is incredible.  So, did you have to drill a LONG (deep?) hole that small?  I drilled  all the way through a 1/2" length of rod.  Would a small hole in a restrictor plate work equally well?

Kim
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Welcome Martin and will be following along on your build.

Thomas
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I did not do the casting, it is from Jetmax (http://www.jetmax.ch/en/turbine_wheels.htm) I also got the inlet guide vane from there.
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From Kits/Castings / Re: Vulcan Beam Engine - AJ Reeves Castings
« Last post by b.lindsey on Today at 03:27:56 PM »
Hi and welcome Martin, even though you have been here a while. Looking forward to following along on your latest project.

Bill
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