Engines > From Kits/Castings

Holt 75 from Germany

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Roger B:
You're off to a good start there  :ThumbsUp:  :ThumbsUp: One to follow along with  :wine1:

fumopuc:
Hi Michael, I will following along too.
The bar stock plans of George Britnell and parts of the engine are available as a CAD model on my computer already.
So may be some time I will follow your route, because in my eyes also it is a remarkable engine.

michelko:
Hi guys,
worked a little on the crankcase/sump. Unfortunately i didīt notice some irregularities on the castings and so i made a hole into the sump wall.

I think i will patch this with a smal piece aluminium jb welded in place.
I have a ac tig machine but i am a little scared because of my low to nothing experience in welding aluminium.
So i think the jb weld woill e the way.

michelko:
Hi Guys,
here is some update on the Holt.
I am ready with the sump. Because of the massive casting i decided to make mill out the material also from the underside.
This recomended an cover to close the sump again. I also drilled a hole from the side to connect the chambers. Here i also made a cover plate.
Next step was the main bairing halves. I left aprox 1 mm in the hole for lineboring.

michelko:
and some more pics

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