3 Zylinder Radial Engine
- Thread starter stefang
- Start date
Help Support Home Model Engine Machinist Forum:
Thank you 
I want you to know, that your comments are motivating me really to step on in this build :bow:
In the next time, there will be a bit of a project stop (a bit can be done on the weekends...), as i have to serve my military service in the german army beginning in April the first, ending January 2010... :
Stefan
I want you to know, that your comments are motivating me really to step on in this build :bow:
In the next time, there will be a bit of a project stop (a bit can be done on the weekends...), as i have to serve my military service in the german army beginning in April the first, ending January 2010... :
Stefan
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Back after a long time
On the last few weekends i had opportunity to finish a few important parts oft the engine:
Crankshaft:
Roughed out the bearing-side:
Material is 42CrMo4, a really tough steel, without carbide tooling, maching wouldnt have finished until now ;D
A few chips:
http://gtwr.de/weblog/wp-content/uploads/2009/03/kurbelwelle1.jpg
Then everything, that didnt look like a crankshaft was sawed or milled away:
Turning the Crankpin
:
The crankshaft is hold down in a eccentric drilled piece of aluminum stock
Milling the contour on the counterweight:
(Using the tilting table of my mill)
The finished crankshaft:
http://gtwr.de/weblog/wp-content/uploads/2009/06/kurbelwelle7.jpg
Prop Driver:
Without the knurling its just a simple job on the lathe, no photos here...
Milling the knurling:
The prop driver was glued to a piece of aluminum, which was, with the help of a vise, mounted on the round table. The table of the milling machine was swiveled by 45° and tilted back by 10°.
Close up picture:
http://gtwr.de/weblog/wp-content/uploads/2009/07/mitnehmer1.jpg
The finished prop driver on the crankshaft:
http://gtwr.de/weblog/wp-content/uploads/2009/07/kurbelwelle8.jpg
Last thing finished were the cylinder liners:
A lenght of steel was drilled and bored
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse1.jpg
Then honed...
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse3.jpg
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse2.jpg
To machine the outer contour of the liners, they were chucked on a excactly fitting mandrel.
Afterwards they were heat-shrinkfitted into the cylinders.
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse4.jpg
And again a mockup picture...
greetings,
Stefan
On the last few weekends i had opportunity to finish a few important parts oft the engine:
Crankshaft:
Roughed out the bearing-side:
Material is 42CrMo4, a really tough steel, without carbide tooling, maching wouldnt have finished until now ;D
A few chips:
http://gtwr.de/weblog/wp-content/uploads/2009/03/kurbelwelle1.jpg
Then everything, that didnt look like a crankshaft was sawed or milled away:
Turning the Crankpin
The crankshaft is hold down in a eccentric drilled piece of aluminum stock
Milling the contour on the counterweight:
(Using the tilting table of my mill)
The finished crankshaft:
http://gtwr.de/weblog/wp-content/uploads/2009/06/kurbelwelle7.jpg
Prop Driver:
Without the knurling its just a simple job on the lathe, no photos here...
Milling the knurling:
The prop driver was glued to a piece of aluminum, which was, with the help of a vise, mounted on the round table. The table of the milling machine was swiveled by 45° and tilted back by 10°.
Close up picture:
http://gtwr.de/weblog/wp-content/uploads/2009/07/mitnehmer1.jpg
The finished prop driver on the crankshaft:
http://gtwr.de/weblog/wp-content/uploads/2009/07/kurbelwelle8.jpg
Last thing finished were the cylinder liners:
A lenght of steel was drilled and bored
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse1.jpg
Then honed...
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse3.jpg
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse2.jpg
To machine the outer contour of the liners, they were chucked on a excactly fitting mandrel.
Afterwards they were heat-shrinkfitted into the cylinders.
http://gtwr.de/weblog/wp-content/uploads/2009/07/laufbuchse4.jpg
And again a mockup picture...
greetings,
Stefan
stefang
when you started the construction of this engine I didn't know HMEM
the revival of this thread today was a beautiful surprise for me
please, accept my compliments now!
very very beautiful work, great looking engine :bow: :bow: :bow:
when you started the construction of this engine I didn't know HMEM
the revival of this thread today was a beautiful surprise for me
please, accept my compliments now!
very very beautiful work, great looking engine :bow: :bow: :bow:
Hi Stefan
Just one question:
Why don't you hone the cylinder liners after fitting them into the cylinders?
I would do it that way because you maybe have a slight deformation when fitting the liners into the cylinders.
Actually I would even bore them after press or heat fitting them to the cylinders and then hone.
Florian
Just one question:
Why don't you hone the cylinder liners after fitting them into the cylinders?
I would do it that way because you maybe have a slight deformation when fitting the liners into the cylinders.
Actually I would even bore them after press or heat fitting them to the cylinders and then hone.
Florian
