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It eager to do higher rews, why dont you!?

Does the pistons share the same crankpin? (It will be a very shaky engine then!). On a "boxer engine" where the pistons goes opposite way, the valves share the same cam lobes...

Hi! I've made a lot of castings in both aluminium and bronze. Remember to have some overshoot at the surface you need to mill off, and add a 2% to it all, (in aluminium)

It looks likes arms from a starfish!🙈

Very nice work! I'm really impressed! Did this engine originally have carburattor, or only injection? If carb, your next move must be to buy/make 12 model r/c carburattor and have those venturi to do some real work!:D

Is there a place I can get only the drawing from?

Impressive! But how did you make the rim and rubber? Or is it available some place?

Volume capacity should be 125 times more (5x5x5). So, 0.030 liter (30cc) equal to 3.75liter!

Do you know if anyone tried to cast all the aluminium parts for this engine?

Yes, correct, thicker wire result in less turn tu fill up the space. I've done this on R/C car-motor, and it make a huge change in torque!

Hi, what you also can do is to open up the brush-motor and re-wind with a much thicker copper wire. This will dramatically increase the torque! They can not run long time, because the motor brush will melt (normally held in place with plastic). But for a start motor it's ok.

What does that extra bar at the bottom of the conrod do? Is it a part of the balancing?

Hello! I have been casting aluminium and bronze for a while. I started up using coal, but went over to gas. I also tried electric, but think its much more boost in gas-driver. Look at below link for an example of what I got. Also look at the crucible (which has to be replaced now and then)...

This is a work of art! Very well done!

It's always fun with cannon! Here is mine 2kg bronze barrel, civil war cannon!

Hi Rob! I would like to make core/hard sand, but find it very difficult to get natrium silicate here in Norway (unless ask for several 100 liters). Do I also need special sand? I've tried to make core out of "plaster of Paris", but even completely dry, the molten aluminium bounce off (I guess...

Hi All, I've been casting aluminium for two years now, and got some experience. I also used Bentonite clay and sand to start with - its good for larger parts. But if you need to make small and highly detailed cast, you should use "red sand". Red sand has excelent holding, and will not fall...

... And I didn't read this before answer to your first post! (and you absolutely right, for a four sylinder boxer, he will struggle a bit) :-)

The pistons are moving the opposite direction. This mean you will get double the underpressure and double pressure compared to a single sylinder...= no problem at all.