does anyone have a crank laying around that they could measure?
I'm looking for the fillet radii on the main and con rod journals. if you can tell if they're rolled or cut that would be very helpful too
quick update
The graphs from left to right are unbalanced engine forces, balance shaft forces and remaining free cranks forces once you add in the balance shaft. An unbalanced busa runs about 18kN of free force, the balance shaft cancels out about 10k worth so you're left over with 8k of free...
Realistically this project will take 1 - 3 years to complete. It really depends what vehicles I've got around at than point in time, I've got a 944 right now that it would be fun/straightforward to swap into. Although I could probably convince a couple buddies of mine to drop it in a Formula SAE...
some basic motion animation, CGs look good
Prelim modal analysis looks fine, no natural frequencies in the operating range 1k rpm - 12k rpm
Next move I think is to move my balancing work into my comprehensive Matlab script and refine the mechanical design of the cranshaft. I really need a...
@Sandow oh....I see
yeah, best not to clog this up then... the reason for a flat plane v8 is because I can use stock jugs, heads and cams. I could redesign all of those parts but they wouldn't be as cheap or good and would be time consuming to design.
If I was truly courageous I would make a...
I heard the RPE and hartley motor's both chewed up bearings for a a couple reasons which has me pioritizing block stiffness as well as controlling secondary free forces. So I've spent a bit of time calculating these forces. Shown below I compare free forces of a 90 deg vs a 75deg (hartley) motor...
Goal:
Design a v8 using Busa parts similar to a Hartley, synergy or RPE V8
Should use as many stock parts as necessary
maintain characteristics of a stock busa but with twice the power
crankcase and crankshaft must be machinable on a 4 axis mill
There is so much to do on this project that I...
Does anybody know where the other balance shaft is located? I am used to seeing this but I can't find the other one, maybe the other counterweight is hiding somewhere on another shaft? Typically there are two, which rotate in opposite directions so that the rotational forces are balanced but you...
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