Home built two stroke engine!
#1
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Home built two stroke engine!
Hi guys...
For months now i am thinking of designing an ultralight aircraft and also design and make a home built two stroke for it.
I'm looking for ideas about designing a 2 stroke ~40-50hp gasoline engine.
Any thoughts ?
For months now i am thinking of designing an ultralight aircraft and also design and make a home built two stroke for it.
I'm looking for ideas about designing a 2 stroke ~40-50hp gasoline engine.
Any thoughts ?
#4
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RE: Home built two stroke engine!
T.O.M. you forgot to put 503 on the end of that reply. I guess the 447 would fit at the lower range too.
I have to agree with him on a more serious note. It would be allot of work to design something that is already available and pretty much bulletproof. It is always interesting to see new projects though.
I have to agree with him on a more serious note. It would be allot of work to design something that is already available and pretty much bulletproof. It is always interesting to see new projects though.
#5
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RE: Home built two stroke engine!
The problem is in the cost of development. Certainly there is always room for the development of new engine designs. Take a look at the twin piston/cylinder two stroke designs the Germans are currently working on. However, the cost is prohibitive. You could adapt a snow mobile engine such as was done early with a UAV platform but there would be a lot of additional time, labor, and expense in doing so. Rotax already has several powerplants availble that meet or exceed the needs of just about any ultralight that fits the legal description. Going from ultralight to light sport aircraft and you already have another group of engines that fill the need.
Any of those engines would come up untold thousands of dollars less expensive to use, and have already been thoroughly flight tested to assure long term reliability. So unless you're brutally wealthy, or have an engineering staff and production facility that needs something to do, developing a new two stroke is just not a cost effective project.
Now if you could come up with something light that would run as a two stroke on diesel fuels and not generate a cloud of pollution as two strokes are prone to do you might have something. Design a "green" two stroke that develops greatest torque at under 2500 RPM without gearing and does not suffer a power loss in doing so? That would be a lofty goal.
Any of those engines would come up untold thousands of dollars less expensive to use, and have already been thoroughly flight tested to assure long term reliability. So unless you're brutally wealthy, or have an engineering staff and production facility that needs something to do, developing a new two stroke is just not a cost effective project.
Now if you could come up with something light that would run as a two stroke on diesel fuels and not generate a cloud of pollution as two strokes are prone to do you might have something. Design a "green" two stroke that develops greatest torque at under 2500 RPM without gearing and does not suffer a power loss in doing so? That would be a lofty goal.
#7
RE: Home built two stroke engine!
Outrunner brushless electric motors develop good torque at low rpms and allow gearless drive of large props. Did the rotary engines of yore develop better torque at lower rpms than the equivalent radial engines? Thanks.
Richard
Richard
#8
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RE: Home built two stroke engine!
Can you imagine the size of a 40 to 50 HP outrunner? Worse, the size of the batteries nneded to power it. You'd need a cord connected to a generation facility.
The WW1 rotarys were not all that great, but that's what they had to work with.
The WW1 rotarys were not all that great, but that's what they had to work with.
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RE: Home built two stroke engine!
You fellers living under a rock? LOL Ultralights are flying with E power http://www.electraflyer.com/ http://www.fly-flightstar.com/
#13
RE: Home built two stroke engine!
ORIGINAL: Tired Old Man
Can you imagine the size of a 40 to 50 HP outrunner? Worse, the size of the batteries nneded to power it. You'd need a cord connected to a generation facility.
The WW1 rotarys were not all that great, but that's what they had to work with.
Can you imagine the size of a 40 to 50 HP outrunner? Worse, the size of the batteries nneded to power it. You'd need a cord connected to a generation facility.
The WW1 rotarys were not all that great, but that's what they had to work with.
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RE: Home built two stroke engine!
ORIGINAL: altavillan
You fellers living under a rock? LOL Ultralights are flying with E power
You fellers living under a rock? LOL Ultralights are flying with E power
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RE: Home built two stroke engine!
ORIGINAL: spaceworm
The question was did the rotary engines back then develop more torque than the radials? The comparison was to the larger diameter rotating mass in the case of the outrunner vs the inrunner, and of the rotary vs the radial. Or does anyone not know? Thanks.
The question was did the rotary engines back then develop more torque than the radials? The comparison was to the larger diameter rotating mass in the case of the outrunner vs the inrunner, and of the rotary vs the radial. Or does anyone not know? Thanks.
#16
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RE: Home built two stroke engine!
ORIGINAL: tkg
The WWI rotaries had a tremendous amount of torque, considering their HP and rpm range. Unfortunately is was unusable 1/2 the time and almost to much the other 1/2. Many of the planes would turn on a dime one way and would barely turn the other.
ORIGINAL: spaceworm
The question was did the rotary engines back then develop more torque than the radials? The comparison was to the larger diameter rotating mass in the case of the outrunner vs the inrunner, and of the rotary vs the radial. Or does anyone not know? Thanks.
The question was did the rotary engines back then develop more torque than the radials? The comparison was to the larger diameter rotating mass in the case of the outrunner vs the inrunner, and of the rotary vs the radial. Or does anyone not know? Thanks.
#18
RE: Home built two stroke engine!
ORIGINAL: altavillan
You fellers living under a rock? LOL Ultralights are flying with E power http://www.electraflyer.com/ http://www.fly-flightstar.com/
You fellers living under a rock? LOL Ultralights are flying with E power http://www.electraflyer.com/ http://www.fly-flightstar.com/
#20
RE: Home built two stroke engine!
My truck battery had to be replaced 3 times since new in 2005. Had to pay a pro rating thing 2 times. I hate to think of what the new electric car batteries will cost $$ $$ $$$ $$$ $$ $??????? Capt,n
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RE: Home built two stroke engine!
ORIGINAL: Super08
The battery is 8500 bucks. I watched one of the videos and they say it will last 800 cycles or about 10 years.
The battery is 8500 bucks. I watched one of the videos and they say it will last 800 cycles or about 10 years.