Started this one yesterday. The castings are well detailed but there is quite a bit of cleaning up removing casting tabs, fine part lines and planning mating faces. Nothing major but progress is slow. After four hours OR SO this what I have. Wrist pins joining the pistons and connecting rods. Crankshaft for 7 and 8 cylinders assembled and seated into adjacent big end bearing.

Looks very detailed.

Hi Francis,
What does the engine belong to....?
Some form of racing car, maybe?

Is this an "I know it's there" build?

Now then gents, the engine is a DFV Cosworth for the back of Jackie Stewart's Monaco winning Tyrrell 003/2 F1 car.

There will be a lot of 'I know its there' in the engine but after that pretty much all the details will show.

Thanks for the update Francis.
No doubt this one will be made as impeccably as your other models.

I do hope it turns out OK Kev. It's a big budget job so there's quite a bit at stake on this one.

Todays progress, the crankshaft and pistons are fully assembled. Next job is to true up the crankshaft so it will spin freely in it's bearings. An initial trial suggests it's close with only a little binding on the first journal, between piston 1 and two and the second row, pistons three and four. Thankfully all the pieces are white metal castings that will respond to gentle force.

This looks like a real labour of love,
Looks good so far.

Quite impressive mouldings there, especially in white metal. A bit of gentle brute force will probably make it obey.

Quote from: kiwichappers on June 22, 2025, 04:06:08 PMTodays progress, the crankshaft and pistons are fully assembled. Next job is to true up the crankshaft so it will spin freely in it's bearings. An initial trial suggests it's close with only a little binding on the first journal, between piston 1 and two and the second row, pistons three and four. Thankfully all the pieces are white metal castings that will respond to gentle force.

Any problems with it spinning Francis just hit it with a hammer hohoho always worked at sea     

This is definitely not a build to rush. Todays progress, crankcase assembled which on the face of it doesn't look like great progress for the time expended. Crankshaft with journals and pistons then added and trued up. Very pleased that the whole lot rotates fairly smoothly given that the castings are several orders below Swiss watch tolerances.

That looks intricate when you zoom in.

Quote from: kiwichappers on June 24, 2025, 09:25:25 PMThis is definitely not a build to rush. Todays progress, crankcase assembled which on the face of it doesn't look like great progress for the time expended. Crankshaft with journals and pistons then added and trued up. Very pleased that the whole lot rotates fairly smoothly given that the castings are several orders below Swiss watch tolerances.

Piston rings?

Probably not, that's way beyond my abilities so I never even contemplated correcting them. A case of ikit and most people will never see such details. Anyway the pistons of the kit only bear a passing resemblance to the real ones of a Cosworth F1 engine.

See attached; piston 3 from Cosworth engine CA098 M2099. At its deepest point, normal to the wrist pin the skirt is not quite 37mm which equates to a tad over 3mm at 12 scale. The defence rests.

This morning has been all about the clutch and flywheel.