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X-mini engine, a game changer in the making?
- Thread starter not_a_bot
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ezcome-ezgo
G'me sumthin to write on
I saw that. Seems legit and potentially awesome. Completely scalable up or down in displacement. Intend to learn more about it.
Cool a palm sized rotary... I like that
reminds me of the old Sachs Dolmar KMS4 w'ankel engines found in chainsaws (size and powerwise that's comparable)
but it's not about the moving parts.. it's about the units produced...
They make 500 pieces, the costs will be around 1200 bucks each
they make 50000 pieces, the costs will be at around 400 bucks each I assume
it's getting affordable as soon as they make hundreds of thousands of units...
which is unlikely.
Just think about RC engines, there's a small rotary made by graupner (5cc or something) 40000 units sold still 700 new (400 used)
But it'd be fun.
If you want one now (at the weight & size of a gx200) pushing 35hp.. find an aixro engine
'sid
reminds me of the old Sachs Dolmar KMS4 w'ankel engines found in chainsaws (size and powerwise that's comparable)
but it's not about the moving parts.. it's about the units produced...
They make 500 pieces, the costs will be around 1200 bucks each
they make 50000 pieces, the costs will be at around 400 bucks each I assume
it's getting affordable as soon as they make hundreds of thousands of units...
which is unlikely.
Just think about RC engines, there's a small rotary made by graupner (5cc or something) 40000 units sold still 700 new (400 used)
But it'd be fun.
If you want one now (at the weight & size of a gx200) pushing 35hp.. find an aixro engine
'sid
mindymogul
Mistress of Destruction
I'm too old fashioned I guess. I'd just take a ol' RE5 engine I have out back and slap it on. IF I could find parts for it anymore...
There's a reason a 497cc single rotary engine will outrun anything in a 850 class...
There's a reason a 497cc single rotary engine will outrun anything in a 850 class...
KartFab
Active member
hmmm I read somewhere that the rotary engines have issues with longevity, so thats why they arent so awesome as we once though. Also the quench surface is an issue with combustion too. Still cool little engines though.
not_a_bot
Tinkerer
I kinda think that had to do more with apex seals wearing out, used in ****3l (curse you word filter) rotors. Plus, they require more frequent maintenance than good old piston engines, something that apparently goes above many people's heads, thus the engine fails and peeps blame the engine.
Be as it may, this design has no such seals, no exactly a good thing as it seems the entire rotor/core, once worn out (with it's consequent loss of compression), would have to be replaced.
Its a project with lots of maturing to go through definetly, I'll keep am eye in it as innovation is a good thing, IMO.
Be as it may, this design has no such seals, no exactly a good thing as it seems the entire rotor/core, once worn out (with it's consequent loss of compression), would have to be replaced.
Its a project with lots of maturing to go through definetly, I'll keep am eye in it as innovation is a good thing, IMO.
well.. you can have something similar with apex seals if you like
meet the cubewano Sonic series:
not too big either, is it
'sid
meet the cubewano Sonic series:
not too big either, is it
'sid
chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
Amazing what a MILLION Dollars of tax payer money will do to a Go KArt engine!!!
Talk about G A B!!!!!
Talk about G A B!!!!!
mckutzy
Well-known member
Im having a hard time to understand these... are they 2 or 4 cycle?...
chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
They are rotary. Its complicated.
The fuel is delivered to the combustion chamber in a manner consistent with a 2-stroke. The exhaust is then expelled using a poppet valve as with a conventional 4-stroke. Hence Hybrid. Not my words, check "Liston's Aircraft Engine Design"
Check this out:
http://www.theaerodrome.com/forum/showthread.php?t=2404
The fuel is delivered to the combustion chamber in a manner consistent with a 2-stroke. The exhaust is then expelled using a poppet valve as with a conventional 4-stroke. Hence Hybrid. Not my words, check "Liston's Aircraft Engine Design"
Check this out:
http://www.theaerodrome.com/forum/showthread.php?t=2404
frankly.. it's simple..
they are SINGLE cycle engines
but the main goal of dear Felix W'ankel back when he was 17 was to create an engine that
combines intake, compression, ignition(expansion) and exhaust into a single revolution;
as that it's comparable to a two stroke engine, which does that as well if that's what you're asking;
Nowadays it's commonly three turns of the excentric shaft (pto.. not crank but that)
for one revolution of the rotor; so technically it's a 1/3 cycle (awkward idea...)
if it's the PTO rotaion you'retrying to figure out.
But technically it's still perfectly seperated intake, compression, ignition and exhaust 'zones'
and thus it's also four seperate cycles happening (just three at once) more comparable to a three cylinder four stroke engine
W'ankels need premixed fuel though.. just like two stroke engines
Yes, it's blurry, fuzzy and in the end not really comparable IMHO...
"strokes" are not happening, so zero stroke is the best match
but since you asked for cycles (as in seperated events, not revolutions I assume)
it's four seperate events ...
but -more correctly - three happening at any given time at once
(hence the three sided rotor)
'sid
they are SINGLE cycle engines
but the main goal of dear Felix W'ankel back when he was 17 was to create an engine that
combines intake, compression, ignition(expansion) and exhaust into a single revolution;
as that it's comparable to a two stroke engine, which does that as well if that's what you're asking;
Nowadays it's commonly three turns of the excentric shaft (pto.. not crank but that
)for one revolution of the rotor; so technically it's a 1/3 cycle (awkward idea...)
if it's the PTO rotaion you'retrying to figure out.
But technically it's still perfectly seperated intake, compression, ignition and exhaust 'zones'
and thus it's also four seperate cycles happening (just three at once) more comparable to a three cylinder four stroke engine
W'ankels need premixed fuel though.. just like two stroke engines
Yes, it's blurry, fuzzy and in the end not really comparable IMHO...
"strokes" are not happening, so zero stroke is the best match
but since you asked for cycles (as in seperated events, not revolutions I assume)
it's four seperate events ...
but -more correctly - three happening at any given time at once
(hence the three sided rotor)
'sid
chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
Thanks I kinda knew that, but you put is so eloquently.
"Yes, it's blurry, fuzzy and in the end not really comparable IMHO...
"strokes" are not happening, so zero stroke is the best match"
"Yes, it's blurry, fuzzy and in the end not really comparable IMHO...
"strokes" are not happening, so zero stroke is the best match"
mindymogul
Mistress of Destruction
It's a 12 cycle
surely
the twelve cycles are
get up,
brush teeth,
shower,
get dressed,
refill tank,
start engine,
drive around,
stop the engine
refill stomach,
hop into PJ,
brush teeth,
go to bed.
Sorry Mindy, you lost me there...
'sid
chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
He had a point it still uses all 4 cycles and 3 happening at once so 3X4=12
yeah well uhmmm.. that'd be the most inconsisten way of counting I've heard of.
you don't call a four cylinder, four stroke a 16 cycle either, do you?
although all four cycles are happening at once.
Someone may correct me, but for all I know Mindy is indeed Mindy...
(aka as female worshipper of Suzuki...)
'sid
you don't call a four cylinder, four stroke a 16 cycle either, do you?
although all four cycles are happening at once.
Someone may correct me, but for all I know Mindy is indeed Mindy...
(aka as female worshipper of Suzuki...
)'sid
NewbCarter
Member
It looks interesting , and this is what i got so far :
-4 stroke
- SI-HEHC Cycle ???
- it has 3 chambers inside which the rotor spins
Video of dyno session : https://vimeo.com/99002635
It seems to have fixed one problem of the ****el design .. which is thermal efficency ..
Tho dem apex seals ..
-4 stroke
- SI-HEHC Cycle ???
- it has 3 chambers inside which the rotor spins
Video of dyno session : https://vimeo.com/99002635
It seems to have fixed one problem of the ****el design .. which is thermal efficency ..
Tho dem apex seals ..
chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
Here is another story about the engine. with I think a little more info
http://jalopnik.com/tiny-rotary-engine-thats-not-a-****el-powers-go-kart-fo-1781988639
http://jalopnik.com/tiny-rotary-engine-thats-not-a-****el-powers-go-kart-fo-1781988639
it looks like it fixed the thermal breakdown issue (rotor cooling is neat )
thermal efficiency.. is yet to be proven.
I like the design, the X-Mini more than the X (the 40hp diesel prototypes)
mostly because of the ultralight rotor.
And indeed very few parts, two of which moving (three?...anyways.. FEW!)
so yeah thanks for sharing n.a.b., thanks for linking the video Carter.
Hopefully this is not going to be vaporware; I'd like to see that IRL one day.
'sid
)thermal efficiency.. is yet to be proven.
I like the design, the X-Mini more than the X (the 40hp diesel prototypes)
mostly because of the ultralight rotor.
And indeed very few parts, two of which moving (three?...anyways.. FEW!)
so yeah thanks for sharing n.a.b., thanks for linking the video Carter.
Hopefully this is not going to be vaporware; I'd like to see that IRL one day.
'sid
mindymogul
Mistress of Destruction
Someone may correct me, but for all I know Mindy is indeed Mindy...
(aka as female worshipper of Suzuki...
Well, w/ 12 Suzuk bikes, a Quadrunner, a Sidekick and Grand Vitara (Yes I know it's GM) in the collection I'd say I know my Suzuki's quite well
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