Howell V4 from Italy

[Foketry]

 

[petertha]

Very impressive, thanks for sharing

 

[Foketry]

After the connecting rods and pistons now the camshafts .
I milled the cams in 2 + 2 pairs , heated in oven and hardened in water
I put them in phase through the 4 axis of my DIY cnc machine, then fixed with Loctite.

 

[Foketry]

 

[bluejets]

I do similar only I make allowance for and fit a 1/16" roll pin in each before cutting/grinding the cam pair just to be sure it's not going to go anywhere.
Do the machining, remove the pin, remove and harden the cam, then polish and refit with a new pin.
Don't trust loctite alone.

 

[Foketry]

I do similar only I make allowance for and fit a 1/16" roll pin in each before cutting/grinding the cam pair just to be sure it's not going to go anywhere.
Do the machining, remove the pin, remove and harden the cam, then polish and refit with a new pin.
Don't trust loctite alone.

I agree with you, but in this case the gluing surface is a long cylinder
I cleaned shaft and hole with acetone and I use high strength Loctite for high temperatures (620)
In case of single cam I use roll pin

 

[bluejets]

I agree with you, but in this case the gluing surface is a long cylinder
I cleaned shaft and hole with acetone and I use high strength Loctite for high temperatures (620)
In case of single cam I use roll pin

You can use whatever argument to justify how you do it, still the fact remains.
As I said before, I use the same approach but use pins.
Nice work otherwise.

 

[Foketry]

The water pump, I started from impeller

 

[Foketry]

 

[Foketry]

Water outlet

 

[Foketry]

Cutwater

Mounting bracket

 

[Foketry]

And finally the complete water pump, already tested, some drag problems with the magnets, even a small interference prevents impeller rotation, need to leave some backslash

 

[Foketry]

 

[johnstij]

Foketry.
I'm just starting to build this engine so I'm following your build with great interest.
Planning a head, where did you buy the distributor brass miter gear from?
Ian

 

[Foketry]

Hi John
I purchased the gears in Germany at this supplier :
https://ghw-modellbau.de/index.php?cPath=91_83_89

I think it is possible to find them also on Ebay

 

[Foketry]

EngineBlock and steel cylinder sleeve , internal diameter 24 mm

 

[Foketry]

Timing gear case

 

[Foketry]

Intake manifold

 

[Foketry]

I welded to 2 square brass bars, I milled the outer contour, then I separated the 2 pieces and finally I milled the internal channels

 

[Foketry]