ESE's works engine tuner

[lodgernz]

A pipe question please:
Am I correct in thinking that the LAST diffuser cone will be the one actively sucking around BDC at mid-range RPM, and the first diffuser will be the one working at peak RPM?

[andreas]

A pipe question please:
Am I correct in thinking that the LAST diffuser cone will be the one actively sucking around BDC at mid-range RPM, and the first diffuser will be the one working at peak RPM?

If put in less absolute terms this is correct, the wave works over plenty crank degrees. By the time the first of a three stage diffuser is the only one in tune, I don't think there is much power left.

[wobbly]

Pretty much - the last diffuser cone angle affects power on the front side leading up to peak.
The header length combined with the first diffuser length and angle affect the overev power past peak.

[lodgernz]

Thanks guys. So I'm not losing it after all...

[jfn2]

I was reading a little the other night about rotary engines and I was wondering, is the rotary engines' port timing similar to a two strokes' port timing? I've only heard about a rotarys' port shape or additional port or peripheral ports but not about the timing.

[husaberg]

I was reading a little the other night about rotary engines and I was wondering, is the rotary engines' port timing similar to a two strokes' port timing? I've only heard about a rotarys' port shape or additional port or peripheral ports but not about the timing.

The inlet porting on a disc valve engine is asymmetrical.
it is laid out as ideal to make the best power with aceptable drivability
unlike a piston port that is best compromise that will still start and run as its inlet port timing is symmetrical.

[jfn2]

husaberg
Thanks for the quick reply. I'm sorry, I should have been clearer. I was referring to a rotary engine as in a Wankel rotary engine. My mistake.

[husaberg]

husaberg
Thanks for the quick reply. I'm sorry, I should have been clearer. I was referring to a rotary engine as in a Wankel rotary engine. My mistake.

Haha
no idea but they peripheral ports and the bridge have huge overlaps
i cant remember the saying it was something like they breath deep but very quick or something.( I have no idea how it was worded but it had most of those words)
they hold promise as they are more hydrogen friendly as they are not as prone to explode as the hydrogen tends to want to burn a little to fast.
Now mazda are finished theya re dead as they used to make and machine the housings for all the others as far as i am aware.
There was a crowd doing military gen sets and all sorts of huges ones where reliability an output are more important than fuel economy.

On the other hand my diesel ute make more HP than a 13b na RX7 ever did and travels nearly 900km on a tank something i doubt the rotary would without towing a mini tanker.

knock yourself out here
http://www.rotaryengineillustrated.c...-ports101.html

[jfn2]

husaberg
Thank you very much. Looks like good reading. It'll take me awhile to get my head onto this info. Again thanks.

[Frits Overmars]

knock yourself out here
http://www.rotaryengineillustrated.c...-ports101.html

Clicking the other links on that page gives error messages. But all goes well if you start at www.rotaryengineillustrated.com

[husaberg]

Clicking the other links on that page gives error messages. But all goes well if you start at www.rotaryengineillustrated.com

i see your animation and raise you a see through glow one being ran on a mix of acetylene for visability



the original RE5 manual they used for service techs has a great write up an description.
I have a copy here somewhere from a mag

[katinas]

Flow marks from reed cage on painted surface. Gap between reed cage side and housing wall 4.5mm. And interesting activity path between two petals (with just 0.6mm gap) at center.

[jbiplane]

May be a bit off topic. I saw fuel pump 3bar 35lph.

They consume ~36 watt what could be a lot.
It is possible to make PWM regulation, exist expensive military micropumps...
but may be somethere exist affordable small fuel pumps? Says 8...12 liters per hour?

[jfn2]

katinas
Interesting picture! Could you put up more pics of this port?

[F5 Dave]

Some engines burn reeds more than others like TZ250 so a lot of sooty marks in inlet from reverse flow transfers. Reeds flow well out of thier sides just as they open I've read so highest pressure cleans soot off is my guess. Maybe.