Harvey's air bike

[deerevdevore]

Coming from someone who had to beat the electric pot apart with a hammer as I drove my electric gocart in an out of control reverse circle, that prop seems a little dangerous.

[foxabilo]

Must... find.... toolbox. Must... build... one...

hmmmmmm 36S with a....... :D

I think this is the thing that will kill me...

[HandiAce]

That was impressive a lot of power. But for how long with that motor run on a full charge?

[gozoisawesome]

wow that is completely awesome , ill buy it

[resisthexcept]

lol thats awesome. If i remember right there was an airplane manufacturer that made some cars that were powered by a propeller. They expected all cars would eventually be powered by propellers.

[aikaslbab]

If bike with rider is 120 kg and at 200 km/h motor product about 1 kg thrust and if not be air resistance and bike on very flat surface and bike be good rolling resistance, then bike run about at 200 km/h speed.

[power2weight]

I weigh 160# dressed

speed with one motor was 167 mph

speed with 2 motors was 175 mph

air resistance is a large barrier

speed is limited by propeller pitch as it exists.

unlike combustion engines, electric motors turn a given rpm per volt.

there is no rpm gain with speed.

Harvey

[aikaslbab]

@power2weight

"... speed with one motor was 167 mph..." Theoretically or in real life you ride in what speed?

What pitch of propeller and diameter in this video and what motor max rpm at 0 km/h bike speed?

[power2weight]

In response to the capability of gas powered 2 strokes.

you could get 10 pounds of thrust from a 25 cc 2 stroke.

This electric puts out 57# thrust and will do 67 mph on the level

Harvey Cleveland

[AntiEvolutionQP]

would a 25cc or 31cc whipper snipper motor do that?

and amazing work thats freaking awesome!!!

[dstarks1943]

I've forwarded your comment on to Harvey for the answer. When I get it from him, I'll post it here.

[aikaslbab]

@AntiEvolutionQP

In more cases - no.

[power2weight]

It would fly alright I would just have to keep it under control.

right now the bike will do 75.5 mph with 2 of these motors in pusher configuration.

I would need more prop pitch to go faster but I am getting a lot of worried looks from my friends as it is.

I agree it would probably be safer to fly.

[Turrtl]

I gotta try this. Maybe you can attach some kind of airfoil shape to it and make a flying bike!

[power2weight]

this makes a lot of noise and would probably terrorize any fish in the area

It would probably keep the mosquitos away

[dstarks1943]

Definitely chop the bugs up.

[archeryfiend]

When we bowfish at night we have a generator going to power the lights. Fish don't 'hear' like we do. Noise wouldn't be an issue at all.

[archeryfiend]

You say it's producing about 50-pounds of thrust. I wonder if it would be enough to push a small boat around. I want to get rid of my trolling motor so I can get through shallow water.

[dstarks1943]

Boy,, I don't see why not. I seriously doubt a trolling motor would put out 50 lbs of thrust. Course, I don't have a trolling motor so this is just a wild guess.

[power2weight]

the motor and controller cost $1000

the batteries and charger and balancer cost another $1500

however you could use 4 car batteries in series to get enough volts (48-59)

there are many smaller motors for less $

one thing that will work for a lot less is buy a lime green Ryobi 18v Lithium Ion drill and chuck up a 36x10 model prop

it will give you 8# of thrust for a lot less $

I have a mariner seaplane and use it to help pull turn around in very narrow creeks.

have fun!!!

[impalanick]

this is why i love you americans, always coming up with the coolest toys haha...

[dmgcat]

You know what would be cool is if your propellers could turn like in turboprop aircraft so you could use it to slow down without having to reverse the motor. Also I'd hate to see what would happen to the person in the back if they fell backwards...any future ideas to encase that thing for safety?

[dstarks1943]

I forwarded  you comments on to Harvey.

[power2weight]

the motor is a 3 phase AC so you just switch any two wires and the motor and prop both turn backwards.

all the neighborhood kids have ridden on the back and well lets just say they are highly motivated to hang on.

[power2weight]

Motor is a Hacker A-150 with a 29x12 Mejzlik carbon fiber prop. In this clip it is powered by 12S2P thunder power Li-Po batteries. Have since bumped it up to 14S2P

and switched to a Vess 27C Prop.

Static pull tests average 50 Pounds of thrust plus or minus 5 pounds.

I have since added a second motor and need to get it out on the highway to get you a speed check.

One r/c car transmitter controls 2 different receivers with the same crystal.

[music01234567]

May I ask what controller is used?

I'm playing with something similar. Homemade BLDC outrunner so far spinning a 22 x 12 , pulling 32 A at 36 volts. (CC 110 HV) For 48 volt test I'm gonna have to buid a proper stand as I can barely hold on to the motor as it is just mounted to a piece of board for now.

I'm using a servo tester for throttle control to eliminate the use of a transmitter.

Good job ! Very inspirational.

[power2weight]

the controller is a master spin 220 which is good to 220 amps. voltage range is 48 to 59 volts you will also need a 50 dollar jetibox to program ramp rates and timing.

I like your servo tester throttle idea.

I get intermittent control with the cheap r/c car throttle.

[dstarks1943]

I forwarded your email on to the builder, Harvey. He'll respond to your questions. It is a Hacker motor with special batteries. Last time we checked, he was getting 67 mph.

[desinfector]

wow O_° much faster than expected...

are u willing to tell more about electrical and mech. dimensions?

where can i get this type of prop?

[dieselguzzi]

@desinfector If you had a steeper hill you could get to terminal vilosity.

[MonkeyWeazelFilms]

I wonder if that's strong enough for a powered paraglider.

[aikaslbab]

@MonkeyWeazelFilms

For 70 kg human need 38 Kg thrust.

[esierra2320]

Looks like a big Hacker on the back of that Bike?

[rockyPants4000]

Wow just wow. I'd ask why, but that would be superfluous. Harvey Cleveland is the perfect name for a backyard wacky vehicle inventor, by the way.