CypherNinja
Member
Not Yet said:
Yeah, my bad, they usually use 2-stroke oil for the little-to-no-residue effect.
Rotomax 650 engine?
- Thread starter John Stahl
- Start date
Yeah, my bad, they usually use 2-stroke oil for the little-to-no-residue effect.
mceagle
Gold Member
- Joined
- Oct 31, 2003
- Messages
- 1,239
- Location
- Sunshine Coast, Qld, Australia
- Aircraft
- Eagle Rotorcraft
- Total Flight Time
- 600 hrs
I wonder who stretched their imagination so far to call it a "4 stroke". My guess would be Mollar.
Scotty
Senior Member
Hah, good catch ! The rotary is actually a 1 stroke isn't it !
Scotty
Scotty
John Stahl
Senior Member
The term they use for the 650 is four cycle engine
CypherNinja
Member
mceagle said:
LOL. It may not be a "4 stroke", but it is definately a "4 cycle". Occasionally, some wackjobs shows up on the rotary engine forums and try to convince everyone that its actually a 2 stroke, or a 3 stroke, or a 6 stroke, or some other nonsense.
Scotty
Senior Member
It has the 4 cycles (functions) but it all happens in one stroke (revolution). Strange motor but damn its sweet !
Scotty
Scotty
Not Yet
Member
Rant
All internal combustion engines have 4 cycles. Some accomplish these in 2 strokes of the piston, some in 4 strokes. The 2 stroke engine overlaps the intake and exhaust cycles between the compression and power cycles. In doing so it steels part of the compression and power strokes.
When comparing the piston engine to a wankel, a stroke is the expansion or the contraction of the combustion chamber. Each combustion chamber follows one side of the rotor around the housing. The wankel is a 4 stroke engine. https://www.rotaryengineillustrated.com/re101/cycle.php
All internal combustion engines have 4 cycles. Some accomplish these in 2 strokes of the piston, some in 4 strokes. The 2 stroke engine overlaps the intake and exhaust cycles between the compression and power cycles. In doing so it steels part of the compression and power strokes.
When comparing the piston engine to a wankel, a stroke is the expansion or the contraction of the combustion chamber. Each combustion chamber follows one side of the rotor around the housing. The wankel is a 4 stroke engine. https://www.rotaryengineillustrated.com/re101/cycle.php
Scotty
Senior Member
Its actually much simpler to just define what happens in how many degrees of shaft rotation. Cant even call the main shaft a crank shaft in a Rotary.
I got big plans for a Rotary if they pan out. I think the 75 HP version might be a hot repower for my Honda Shadow bike !
Scotty
I got big plans for a Rotary if they pan out. I think the 75 HP version might be a hot repower for my Honda Shadow bike !
Scotty
Not Yet
Member
Degrees of output shaft rotation, be it crank, eccentric, wobble plate, or whatever, have no bearing on whether an engine is a 2 stroke or 4 stroke engine. There is even one engine the (loudmouth free Piston Jet) that doesn’t have an output shaft at all. It is still a 2 stroke engine.
Maybe more interesting is comparing the power strokes. The 4 stroke has a 180 degree power stroke every other revolution. The 2 stroke engine has a 150 degree power stroke every revolution. The wankel has a 270 degree power stroke every revolution.
Yah I hope it pans out also. The 1300 would be the perfect engine for my tandem gyro. Still nothing but dreams now though.
Maybe more interesting is comparing the power strokes. The 4 stroke has a 180 degree power stroke every other revolution. The 2 stroke engine has a 150 degree power stroke every revolution. The wankel has a 270 degree power stroke every revolution.
Yah I hope it pans out also. The 1300 would be the perfect engine for my tandem gyro. Still nothing but dreams now though.
