Hyena
10 GW
Technically I should post this in the non-hub motor forum I suppose 
[youtube]b9QedZlRwvc[/youtube]
[youtube]b9QedZlRwvc[/youtube]
A new form of ebike propulsion
- Thread starter Hyena
- Start date
Wow.....awesome.
I have thought about doing something very similar but on a kayak to avoid all the complexity of a common submerged propeller. I always have a hard time imagining that it would have enough "push"....but it doesn't look like thats a problem with these monster motors.
Very interesting how this guy's setup is just two motors with relatively small props. Every E-ppg I've seen has been one large, almost always geared prop.
At one point in my life, after doing the math and finding it possible, I was obsessed with the idea of flying a paraglider with 3 $99 weedwackers strapped to my back. But I loathe engines so I dropped it after a while.
I have thought about doing something very similar but on a kayak to avoid all the complexity of a common submerged propeller. I always have a hard time imagining that it would have enough "push"....but it doesn't look like thats a problem with these monster motors.
Very interesting how this guy's setup is just two motors with relatively small props. Every E-ppg I've seen has been one large, almost always geared prop.
At one point in my life, after doing the math and finding it possible, I was obsessed with the idea of flying a paraglider with 3 $99 weedwackers strapped to my back. But I loathe engines so I dropped it after a while.
johnrobholmes
10 MW
That doesn't look dangerous at all! Great for clearing off pedestrian paths
Love the scenery. Looks like an awesome place to live.
Love the scenery. Looks like an awesome place to live.
docnjoj
1 GW
Maybe some ducted fans for safety? They arent quite as efficient as the props but would chop up fewer pedestrians.
otherDoc
otherDoc
EVnewbie
100 W
Now I have a use for my 3,800 RPM 48V 35 amp brushless motor and controller!
One larger fan (about 750mm across) gear the motor and propeller drive for most efficient speed and press on. Yeah, I would use a propeller guard for obvious reasons and it would be a simple drive train. No worries about overheating electric motors, spinning hub motors in the dropouts, gearing high speed motors way down and all those challenges.
Could I go 25 to 30 MPH with a single prop? Attach the rig to mountain bikes, recumbent bikes, row boats and the like.
Think the cops would notice?
One larger fan (about 750mm across) gear the motor and propeller drive for most efficient speed and press on. Yeah, I would use a propeller guard for obvious reasons and it would be a simple drive train. No worries about overheating electric motors, spinning hub motors in the dropouts, gearing high speed motors way down and all those challenges.
Could I go 25 to 30 MPH with a single prop? Attach the rig to mountain bikes, recumbent bikes, row boats and the like.
Think the cops would notice?
thewmatusmoloki
10 kW
Haha that would surely be a hell of a surprise for any attacking magpies.
johnrobholmes
10 MW
With ducted fans, you could easily have swivel mounts and in-crowd use. Get a few insane motors and it becomes a personal LSLEV- Levitating Super Light Electric Vehicle :lol: Heck, with a wing set I bet that bike could have taken a few little glides cresting over the hills.
I now have a life dream 8)
I now have a life dream 8)
OK....so I want to do this (on a boat)
Does anyone know of a good motor and prop combination for pushing big stuff at relatively low speeds? Direct drive for simplicity. Just go with a monster turnigy and a 18" prop? Its got to be more complicated than that
I'm going to be putting it on a kayak. Solves to many problems....no holes below the water line, ~20lbs saved by ditching the trolling motor, virtually zero drag when off, and not limited by design to a low speed like most trolling motors either. Its so elegant to just bypass power transmission issues and just push against the air directly
I wonder if 5kw will get a kayak up on a plane?
Does anyone know of a good motor and prop combination for pushing big stuff at relatively low speeds? Direct drive for simplicity. Just go with a monster turnigy and a 18" prop? Its got to be more complicated than that
I'm going to be putting it on a kayak. Solves to many problems....no holes below the water line, ~20lbs saved by ditching the trolling motor, virtually zero drag when off, and not limited by design to a low speed like most trolling motors either. Its so elegant to just bypass power transmission issues and just push against the air directly
I wonder if 5kw will get a kayak up on a plane?
AmpEater said:
This guy:
http://www.youtube.com/watch?v=luiyxTRyN0E&feature=related
got 54Kg thrust from 12 kw
spinningmagnets
100 TW
Add inflatable pontoons onto the sides, and its an amphibious assault vehicle! or, a fishermans-friend that allows him to get into the shallows.
Bike to the marshes/lake, scoot out to your favorite spot with no fears of propellor entanglements. I'm not going to say its quiet, but its probably quietER than a gasoline powered prop and fishing-boat outboard engine...
Bike to the marshes/lake, scoot out to your favorite spot with no fears of propellor entanglements. I'm not going to say its quiet, but its probably quietER than a gasoline powered prop and fishing-boat outboard engine...
LI-ghtcycle
10 MW
What about a prop with a ring at the end like you see on powered parachutes? I was looking into Electric Ducted Fans, but they are more of a slow acceleration high speed/low efficiency set-up, so a pusher prop makes more sense. but your can have a ring around the diameter of the prop.
I have seen full scale versions of these pusher props on gas powered powered parachutes, but kind of defeats the purpose. :wink:
Now HERE's an electric "trike" that might be perfect for our "Wold E-bike Challenge" (just scale the engine down a bit, add bicycle mechanics, prop shield and put it on 2 wheels
)
Pretty impressive power to weight, trike it's self is only 85lbs!
http://www.electraflyer.com/trike.php
I have seen full scale versions of these pusher props on gas powered powered parachutes, but kind of defeats the purpose. :wink:
Now HERE's an electric "trike" that might be perfect for our "Wold E-bike Challenge" (just scale the engine down a bit, add bicycle mechanics, prop shield and put it on 2 wheels
)Pretty impressive power to weight, trike it's self is only 85lbs!
http://www.electraflyer.com/trike.php
zap
100 W
Stealth be damned!
spinningmagnets
100 TW
And the best part is that...
If a bicycle cop wants to cite you for driving a motorized bike on a bike path, fold out the wing, hit the voltage doubler switch, and take off!
If a bicycle cop wants to cite you for driving a motorized bike on a bike path, fold out the wing, hit the voltage doubler switch, and take off!
torker
100 kW
The way it was with 2 counter-rotating props I assume looks good. One large prop and you might end up torqued over and if you had a throttle stuck man that could get ugly.
Might suck if you top a hill and find the road curves quickly away, though, or it's a T-intersection with a high concertina fence.Whiplash said:
MattyCiii
100 kW
At first using a fan to propel a bike looks like a strange, possibly dangerous idea. But is it really?
I was already thinking about placing a Persistence of Vision (POV) fan light on the bike, to have a lightweight light that is also highly visible, something like this perhaps:
Apparently no longer available, but the source is (http://www.nightgraphix.de/index.html)
But if designed right maybe it can pull double duty as power assist. Thoughts?
I was already thinking about placing a Persistence of Vision (POV) fan light on the bike, to have a lightweight light that is also highly visible, something like this perhaps:
Apparently no longer available, but the source is (http://www.nightgraphix.de/index.html)
But if designed right maybe it can pull double duty as power assist. Thoughts?
Lock
100 MW
Lots of stuff about electric air props here already:
http://endless-sphere.com/forums/viewforum.php?f=38
Tks
Lock
http://endless-sphere.com/forums/viewforum.php?f=38
Tks
Lock
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