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Member postings for Michael Horner

Here is a list of all the postings Michael Horner has made in our forums. Click on a thread name to jump to the thread.

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Thread: Whittle V8 - Crankshaft
14/04/2012 09:15:54

Welcome back from hibernation Steve.

I have been chugging along with my version of the Whittle V8.On my last attempt at the crankshaft I didn't bend it but I did manage to remove to much metal with the mill crying 2, and that was being careful! I gave up on the idea of CNCing the crank it was making my brain hurt. I am now working on the conrods, getting there slowly. The cap bolt holes were off to one side, think I've got that sorted now. I was hoping to do them M2 but there isn't enough metal so I am going to try M1.6

Michael

V8 Conrod

Thread: Another broken tap thread
27/01/2012 08:58:17
John There many ways of digging out broken taps. But before I begin are your holes ‘through’ or ‘blind holes’?
Method 1 The chemical method. This depends on the fact that hardened steels are more readily attacked by chemicals than mild steel. I generally use this method for taps smaller than 3.2 mm. Get hold of a solution of Ferric Chloride (the stuff used to etch Printed circuit boards). Clean out the cutting oil with isopropanol then drip in the Ferric Chloride. If it is a open ended hole stop up the bottom with something. This method is slow.
Richard.
How slow is slow? I have a broken 2mm tap I wouldn't mind removing. It's in a blind hole but it full length about 8mm.
 
Cheers Michael
Thread: MEW 186, Best ever issue
18/01/2012 19:34:26
Hi Ray
 
Too old to learn G-code! There's a guy built a model deltec diesel engine with the help of CNC from what I can remember he didn't take up CNC until after he retired. In his biograpghy he mused that he was to old but had a play, found out he could do it and the rest is history.
I've taught my self G-code, I'm not an expert but get it to do what I want JS did a posting with some G-code this was added to my knowledge and now has added some flexibility to my code.
 
My method of learning is to create desire, I am building the Whittle V8. For me to produce 8 of everything would drive me nuts, so for me CNC is the answer.
 
If you can produce a drawing in cad save it into a dxf format you can then open it in cut2d
save this to mach3 it's then ready to mill. JS has mentioned this in a recent post where he was doing a demonstration at arceuro.
 
Hope this helps
Cheers Mike.
Thread: Whittle V8 - Crankshaft
14/01/2012 23:24:40
Hi Steve
Thats the ponder, if I do it the JS way there won't be any crankpin centres so once you dismount it there isn't anything to referance to so it will have to be a finished job. I've thought about the barrelling and may be once the pin is nearly to size pull back the cutter in the Y so that the edge of the cutter is on the centre line of the pin. can only try.
Cheers Mike.
14/01/2012 14:18:17
Hi Steve
On my copy conrods are in section 6. To make it easier to find i added the main subject as part of the file name.
 
I would say your crank looks pretty good but there is no picture! Keep the tips coming. I'm doing the barrels via cnc, I don't have Mr Whittles patience!
 
I am pondering the crank, do I do it the JS way or on the lathe?
 
Cheers Mike.
Thread: Crankshaft construction
03/11/2011 07:51:28
Hi John
 
The crank looks fantastic, I have the hardware any chance you will be posting the code? I am building the Whittle V8 and after bending the crank 5 or 6 times in the lathe it got put on the back burner. The dummy ones where made from mild steel which may have been part of the problem, but having not done any engine building before probably contributed as well.
 
Michael.
Thread: Why not Make Two?
27/10/2011 22:29:18
Hi Steve
Viewed your blog, looks good, so does the crank .
 
Have you made 2 ? If I bend another might be a way out. ,
 
Did mine in mild steel to get the hang of things because I've never done anything like it before.
 
When you get on to the barrels check the dimentions carefully, I think the drawing dimentions are correct but the text one has an error on the length of the spigot.
 
Cheers Mike.
25/10/2011 01:01:43
Hi Steve
 
Where do I find your Blog?
 
I started to build the Whittle V8 earlier in the year but after 2 bent crankshafts I got sidetracked with CNC. I don't have the patience that Eric Whittle had in abudence. I have noted your sleeve support which I will try when I get back into it. I have also done the crankcase halves and the bearing supports.
 
Mike.
Thread: Using old washing machine motors
25/09/2011 09:58:27
Hi Ian
I have bought one of those controllers using the TDA1085C mentioned by Les. I use it on a floor standing 12 speed drill, I got sick of changing belts. If only I'd known about center point drills. You mentioned using it at low speeds and would there be enough torque, I think there will but the motor will produce a lot more heat ,cannot give you any figures but my motor cuts out on big drills at low speeds because it has an in built thermal cutout which has tripped out in the past. If you want to play about with the motor use a low voltage that way you limit the power into it. If you want a very low speed you can arrange the windings in a shunt wound configureation. I cannot help with calculations my maths just ain't up to it.
Cheers
Mike.
<< First < Prev 7 8 9 10 11 12
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