BobsWrath

I was just wondering how many Rotors can there be in an engine, max?

mwatson184

As you increase the number of rotors, you increase the eccentric shaft flex. The most i've seen in a successful motor is 4.

t-von

iTrader: (8)

Flex wouldn't be a problem if the e-shaft and engine is designed to have multiple journal bearings like what a piston engines crank shaft has. Look at the in-line six 2JZ engine. That engine has a bearing in between each piston rod keeping the crank shaft from flexing. All piston engines are built that way.

mwatson184

good point

Kenku

Yeah, I'd say it's like asking how many pistons there can be in an engine, max. Kinda more depends on how much space you have to cram the engine into, really...

Kim

www.gurumotorsports.com makes custom shafts with center bearings.

Nice but pricey

mcnannay

ill have to do some searching, but im pretty sure there is like a 6 rotor being used for a generator or large machine, i can't recall.

fcdrifter13

The most I have seen is 6. Oh yeah I want it.

And of course I have a link.

http://www.hurley-engineering.ltd.uk/hme13b.aspx

look at the bottom of the page.

DJAngelicon

HOLY MOTHER OF EARTH! 6 Rotor! Hahahaha, nice. Funny that is the company I was thinking of getting my 3 rotor 12A in the near future but had change my mind into trying something like the 17B or 24B hehe... When I have money of course.

satoacs

i saw a vid of that 6 rotor..........MY GOD! it makes me speechless

Smilodon

You don't have to have your front and back 13Bs in phase. Just turn the rotor shafts 90 degrees out of phase with each other, and join the the shafts at that point. That way, you have a motor that is not doubling up on any torsional, axial or planer vibrations, but instead partially cancelling them out.

This will, however, result in more wobbling of the motor compared with having them in phase, I would guess. But less than the motor wobbles when it is just one 13b.

Smilodon

"wobble" meaning rear of motor exhibiting rotation in one direction, front in the other, pivoting roughly around central mass.