Mills 1.3

[Ghosty]

Hi All,

Finished of machining of the crankshaft today.

First machined up a jig to hold the crankshaft with correct offset for big end.

Fitted crank in jig and then machined the big end to suite the conrod.

Then moved assembly to the mill to machine the crank webs.

Cheers

Andrew

 

[Ghosty]

Hi All,

PROBLEM:- Getting small diameter cast iron round bar.

FIX:- Make your own.



I have some 40mm(1.575") round bar, cut length off of it, I have a 1mm(0.040") slitting saw, cut the round bar into quarters.

Pieces almost triangular, fit into 3 jaw and machine round.

Now have a piece almost 14.5mm(0.565") in dia, A lot less waste that machining the 40mm bar down to size, and I also have 4 pieces.

Now to make the pistons.

Cheers

Andrew

 

[Ghosty]

Hi All,

Up until now I have been making the parts for two engines. Now I will be working on just one engine at a time.

Started the most exacting part of the build. Started with lapping the cylinder, very messy part of the build.

Then machined and fitted the contra piston to the cylinder.

Then from the same blank, I machined the piston and then lapped for fit in cylinder, more mess.

Then cleaned in ultrasonic cleaner and then assembled complete engine.

We are almost there, now on to the starting bit before finishing the other engine.



Cheers

Andrew

 

[Ghosty]

Hi All,

Well after a little bit of playing around, "IT'S ALIVE", After about 20mins of runtime now it's swinging a 9x6wide blade with no problems.

Now on to the other engine.

Cheers

Andrew

 

[Ghosty]

Hi All,
What is better than one engine running, how about in stereo. Sorry no sound until 1:40min
Cheers
Andrew

 

[Ghosty]

Hi All,
And thus endith the build of these engines.
Now to build the planes for them.
Cheers
Andrew

 

[Ghosty]

Hi All,
It's been a while, but one almost has a home. Just waiting on some more balsa to arrive for the nose of the plane.
The plans can be found at https://outerzone.co.uk/plan_details.asp?ID=2925
Cheers
Andrew