Tail heavy, high center of gravity, difficult speed control, dangerous...I love it! Hehe Lots of things to improve, gets the creative juices going. This was how the people of old invented and developed things. 'Been a subscriber since the time of the liquid desiccant air conditioner.
People don't invent things anymore because most states would put you in jail for operating an unlicensed motor vehicle without insurance. Only a mega-corp can do these things legally with the exception of EAA members building light planes. There is no such group for builders of cars or boats so ordinary people don't invent. They go in their apartment and spend their lives watching television like they are supposed to.
I found your channel only a few weeks ago, and it's exactly what I needed. Passionate, methodical and understandable demonstrations on an endless variety of topics. I've been binge watching and it's like a college education without all the debt. And as a lifelong bicyclist, finding this video first is amazing. I'm already working a version of my own. Thanks for the inspiration, and I look forward to learning more in the future
John, you’re in for a binging treat! His interests are wide and varied - you’ll learn things you didn’t even know you’d want to learn. The channel is equal parts physics chemistry engineering and fun.
Really appreciate the smooth camera work! I was a full 10 minutes in before I noticed and re-watching it really shows you guys put a ton of effort into it!
@@TechIngredients Always room for improvement in the video department here... keep up the great content! You are definitely an innovator that gets across the finish line. Cheers!
@@TechIngredients you should definitely convert that thing to an ebike as well so you can have dual throttles the ebike part will get you up to speed and then the other part will keep you going... very cool
@@TechIngredients Interesting... I've observed this phenomenon on several occasions with your channel. This is not limited to the video quality either.
Drop centre of gravity a bit? For better turning performance. Also; people don't think about it often, but Wright brothers were bike mechanics before they started building planes. Big thrust to weight ratio and max efficency has been the name of the game with bikes since forever.
What about putting some of those monster bike wheels on the rear? I wouldn't want one on the front because at higher speeds it might lift off. And that makes me think about the possibility of ground effects. Of course like you said lower the center of gravity, but it looks like they could widen the stance a bit too. Oh and a Sugar Bear "esk" front end would be sweet.
Wonderful "toy". Besides having fun designing and building it, you looked like you thoroughly enjoyed yourself taking it up and down the road. And your neighbor also seemed to enjoy it. Can't wait for the next chapter.
Absolutly love it! This is the spirit of the hot rodders, anything can be made faster, louder, more dangerous. Why wouldn't you do it? Can you imagine being his neighbor? Too much fun. It is amazing what can happen when we use our powers for fun instead of serious stuff. Love this guy!
Being safe would also having the rider wear an approved motorcycle helmet! This is a cool idea, but I would install a rear guard on that fan, and lower the center of gravity. Other than that, enjoy!
Yeah we had a name for machines like that we called them (DEATH TRAPS) but it's built for clicks so enjoy the 500 yards it traveled because that's all it will ever do. Always a good idea to have your fuel tank just behind your head. At least when you roll the top heavey trike you Can douse your self with gas and hopefully your on dirt because sparks from a hard surface might give you a new hair style 🤣
@@Blox117 well it make GOOD evidenced for everyone against small PEV. Maybe next he can DIY a bomb you can ride well he's already done that hope he gets the clicks for building such a stupid machine. Anyone can build a bomb but riding it is a different story. Problem is this trike is as close to unrideable as you can get. And keep ebikes out of this they have nothing to do with a dumbass that puts rockets on sleds. That's not a ebike doubt he can build one as they don't come as a complete machine like the air boat motor and prop you can buy them at the hardware store in Houma LA
@@E-bikeeverything57 You think a man that builds laser systems and small rocket engines can't deal whit four cables and a modified tire? You should probably actually watch a video before you start raging and flaming about something.
You can fix a lot of the slow acceleration problem by using pedal power to help start. You will rapidly lose the ability to hold cadence as speed ramps up, but at low speeds you should easily double current performance. Also, I don't think your speed is going to be limited by your power. I think you'll find the upper limit of your tire/rim/bearing assembly first. Man, do I love this.
I've known people who got ordinary pedal bikes up to 60mph, you just have to keep steady. The bike can handle it just fine. There are a few places where bikes are allowed on the freeway, and one person was telling me how exhilarating it is to pass freeway traffic at speed, using only the power of your own legs.
When I saw Tech ingredients had a new toy, I had to wait until after my toddlers were asleep. I didn't want to be interrupted watching your inspiring show. I'm giddy.
The center of gravity is a bit high for safe cornering, that's the main issue with this thing. Bicycles (and e-bikes) get around this to some extent by being able to move the centre of gravity by leaning the bike over. Consider changing over to a bicycle frame, it will be a lot more fun. The cornering limit then becomes an issue of traction rather than just falling over due to a high centre of gravity. Traction limits are a bit easier to "creep up on" compared to just falling over due to a high centre of gravity. Motortrikes get around this to some extent by having almost as wide wheel base as a car, but even then they can still throw you at high speed. For this reason motor trike designs are now tending to put the double wheels on the front. This is more expensive as it requires car type CV joints and suspension, however it's much safer as it can't throw you unexpectedly (you'd have to be doing something *really* stupid. Also, you are kind of re-inventing the wheel with the motor part. Powered paragliders (PPG) have had high performance two stroke motors from the start. An 80cc high performance PPG motor like that on the Atom 80 would possibly be cheaper than the 20cc motor you've got there after reworking it for 20 HP. Atom 80 is about 20 HP I believe, at 9500 rpm and will go all day at that speed. To answer the question, yes PPG pilots have been riding bikes, scooters and skateboards with a PPG strapped to their back since forever too. Having a purpose built vehicle would increase the safety of this type of transport. While on the subject of safety I would recommend that you instigate a kill switch of some sort on the motor, similar to what is used on snow mobiles, jetskis, and power boats. The driver (pilot?) has a toggle fastened to them which has bung on the handlebars held in the up position. In the case of a crash or the pilot coming off the vehicle the bung is pulled out of the switch which cuts the motor. Another safety feature build into all PPG motors is a clutch. At idle the propeller does not turn (hardly at all). Only when power is applied does the clutch engage fully. Just my random thoughts on this project... ETA: A really fun variation on this frame would be a modification that that raises the inside wheel when you turn, to lean the trike. The engineering would not be trivial however, since the amount of lean required is dependent on speed. I think I would have a cam that rotates as the speed increases, and use that to control the amount of lean of the trike depending how much the handlebars are turned. So, a double cam system maybe.
Good but long comment, needs more upvotes .. i also was thinking first moment of seeing trike that a double front steer leaning trike would be much safer
@@Sembazuru I'm not sure it's the right solution. A chainsaw clutch is high rev high torque, while a PPG clutch just needs to engage at low revs, and it's after the ratio reduction. I guess you could try it and see. I would probably work, but it might not engage exactly when you want it to. I guess it might be possible to alter the clutch (springs and weights) to work the way you want it to.
The tadpole configuration is far more stable when turning than the delta configuration. But because of the way the motor and propeller are positioned, this would make the weight better balanced for this particular project. Although, I do think that the motor and propeller could be mounted on a tadpole configured tricycle, this is just an engineering problem that could be solved. BTW. A three wheeled, human powered vehicle is called a tricycle, never a tree wheeled bicycle.
@@practicalguy973 They didn't ban them so much as companies stopped making them because of lawsuits. You can still find and make street legal trike motorcycles but they aren't very stable which is why back in the early 2000's (maybe the late 90's I forget) they brought back the trike but swapped around and in a street bike format. A lot more stable but not nearly as agile as an actual street bike.
I have left more comments on your videos than anyone else. Its because I appreciate so much the work you guys do. Some of it is clearly just for fun, other videos are about science and education, while even still others are about telling people ways to help themselves with relatively easy to make products. This channel is amazing and what you guys do is so appreciated. I love that you guys love what you do and I hope you keep killing it with these!
My inner child is standing up and cheering. The current airline pilot I became is doing the same. This is the type of thing I want be doing with my free time, but between work and having a 5-year old, there's precious little of that at this time of my life. Not that I'm complaining one bit about it.
people who have never built a custom bike or really ridden any bike for an extended period don't grasp the fact that even the speed the motor is turning can effect the way a bike is moving.
When I used to fly ultralights, this was the same principle minus the wing....A few times I "drove" my ultralight around the flying field, but had no braking except dragging my feet and reducing the throttle...good ole days :)....great video
The "constant acceleration" effect is because the wind entering the front of the fan improves the efficiency of the fan. This will happen until the wind is moving faster than the blades and then wind drag on the blades takes over and then efficiency drops off badly
@@Famouslastplace Idk. He may have mentioned it in a video. He has done all kinds of propeller based stuff lol. My memory is shitty even though my comprehension and understanding is pretty okay
@@Famouslastplace you are talking of the windmill powered bike, right? That bike is basically exactly the opposite of this one. In this case the propeller can't produce any thrust as soon as the wind speed reaches the speed of the propeller. In veritasium's bike the wind speed needs to be higher than the speed of the propeller/wind turbine, so the wind applies some force to the blades to provide power to the wheels.
@@Henning_S. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yCsgoLc_fzI.html This is the video. I'm not sure if you are referring to this vehicle as a bike. I'm not knowledgeable in these types of things
@@stupidvids0 If your memory is bad, try getting 9 hours of sleep every night. When I had two full time jobs and not enough time to sleep, my memory went to hell. I've noticed it's better when I get more sleep.
As it is a "constant force" device, (more or less), the faster it goes, the more power it outputs.. (which is why the "keeps on going" feeling, I suppose)..
@@dariusmccormack7793 feathering is a different thing, it's the ability to align the propeller blades with the airflow to lower the drag of an engine that isn't turning. You're thinking variable pitch.
And the more resistance it's going to push against... Upper limit is going to be near terminal velocity at atmo pressure i think... Which is about 60 times faster than I'd be wanting to travel on a bike.
On this topic, I'd strongly recomend researching or trying an EUC, they are way more capable than E-bikes, E-motorcycles, and other things. They are insanely compact, efficient, and way more capable than a huge range of things. For example the Begode Master Pro can be ridden at 55 mph stably and has a 125 miles range (200 km) at standard speeds (base model tesla has a 272 mi range so 46% / 2.18x the range for comparison) via a 4800 Wh battery (most efficient vehicle I know of). And because of its truely tiny size it can easily be taken with you on public transit, inside your car, inside a store, or within a crowd. There is a ton ton ton more benefits. Your hands are fully hands free so you are able to do anything you can do while standing or sitting, just while standing or sitting on the EUC. It's effectively "powered walking" and "powered sitting" from the slowness of a walking pace up to 55 mph with a range of 125 miles, turning radius of 1 foot (or 0 feet depending on how you turn). And if you want to stop and stand stationary you just step off, click the handle up, and it is a power-assisted suitcase that will follow you and can carry stuff. And if you come across stairs you can't go around, it can ride up or down them. Or if you need to be more delicate you can get off and have it along side you as a suitcase and it will climb up or down the stairs itself. To get your mind around it, it's self balencing like a segway but has only 1 wheel, a seat, and no handle. The wheel goes between your legs and there is a spot for your foot on either side. You have to balence left and right just like a bike (forward and backward are handled for you by the self balencing), so it's as difficult to learn as a bike. Just like a bike you balence by slightly turning left and right. The same applies on an EUC, but steering is handled by shifting your body weight left or right. This does mean that if you already know how to ride a bike none of that skill will transfer over since it is steered differently. It typically takes people a week to learn practicing every day.
Please, wear a helmet on that contraption! (My brother the EMT tells me that there's a technical term for riders without helmets: Organ donors.) Your viewers all think that head contains something worth protecting.
@@dannixon247 those things are actually illegal in my state now days. Not sure about the rest of the country, but I'd guess most states probably banned them by now.
I was always surprised they stopped making them for such a silly reason. Lots of things are inherently dangerous but they still make them. I've ridden on 3-wheelers and didn't have any problems because I know how to adapt to what I'm riding and how to shift my weight. It's even fun to ride them on two wheels intentionally tipping it so you do so. I mean think about it, people used to race them. It was only the casual rider who should have likely never had one that ruined it for everyone. I'd still love to have one in addition to my 4-wheeler.
Yes! I'd love to see builds and comparisons for a rotary vane sub, a servo driven sub, and perhaps something really odd, like a high-volume fan in an h-bridge-like duct system. A ridiculously-sized bass horn would be fun too.
I had built something very similar about 15 years ago, it was a wind sled for on ice and snow, I made the propeller myself, I built the vehicle with rudder pedals. The soul purpose of the vehicle was for me to get accustom to useing but feet for yaw control in a ultralight airplane I had purchased that was a tail dragger airplane with foot controled rudder just like a regular airplane, and it was perfect for that " it was a simulator" for flying a airplane, and I did get good at useing my feet and was successful in teaching myself how to fly a airplane " and my wind sled is the reason for such success" the vehicle became a very fun vehicle for anybody to drive. The skis were cambered so they wouldn't catch if you were turning abruptly. It was incredibly fast ' it had conventional steering as well, so you could use the two forms of steering opposite of each other to drift or to prevent spin outs. Tons of fun" I have a pic , not sure if I can send a pic?
I live in Dayton Ohio home of the Wright Brothers. I can see the museums they started out in and their workshop that built the first plane and there is a prototype on display. This reminds me of the idea they had.
Very cool! In the next episode: we have added these two - easy to fabricate - wings and we have a Fokker D.VII like replica that is not road legal but you can drive it a couple of hundred meters until it gets airborne. 😅
pretty cool , i made an electric one its on my channel.. mine was a regular bike , I never exceeded 31 mph because the bike was low quality walmart, and the brakes were iffy. What i found over the few months experimenting is that a bigger prop is always better for off the line acceleration , but 30 inches with 4 blades seems to work quite well. Nice work!
Makes sense for it to have a slow start and then keep going as the thing speeds up - the propulsive efficiency raises as the vehicle speed approaches the exhaust speed (prop exhaust in your case). Am on holiday reading 'Aerodynamics for naval aviators', was on the page by coincidence
Really nice build you got going. I'm into RC planes (race drone included), and the thing i found out after testing is, the steeper the angle, the quicker the acceleration. If you want to go faster, you need more RPM. Bigger propeller also helps with efficiency. Thats why if you look into long-range drones (long fly times), 7-9" is what is best, instead of the 5" most people fly.
Great video, loved the neighbours! Do you need to add a cover over the back part of the fan cage so it it's completely enclosed? I wonder what mpg this thing gets? Loved the cuts to Rod Taylor in The Time Machine, this was one of my favourite films when I was younger.
A chain would be more efficient by far. This machine is most efficient at max speed only. The same engine with a CVT would use much less fuel in a stop and go application.
@@kevinsellsit5584 And of course you can get obscenely cheap so-called torque converters online and tune the clutch springs for purpose and engine output.
@@kevinsellsit5584 CVTs are horribly inefficient currently. It would also have to be computer controlled to match the ratio to the power output. Anything between the driver and the driven reduces efficiency. For example, a car's peak fuel efficiency will be achieved with a 1:1 engine:transmission ratio with the engine rpm at peak torque.
Be careful, there are people who don't know how to ride a tricycle, they think it's like riding a bike and they do counter-steer to turn like on a bike and crash into a wall. I have a tricycle and many people who have tried it have crashed.
Amazing how flexible you are at attempting multiple projects that require diverse general knowledge, scientific, and engineering skills. If you paint, and work sculpture too, you are a true Da Vinci Renaissance man of the 21rst century. .
Question. Would it be worthwhile to have 2 systems connected to the bike? 1) first propulsion method would be the one he devised including where it is mounted 2) you could integrate a battery pack by putting it in between the frame by the pedals to the seat. So that yoy would be able to swap between the 2 independent systems sort of like a hybrid car but instead you have the ability to pedal normally, pedal-assist, fully electric drive, or a petrol/gas motor. I know this would add weight but it might be a neat alternative to deal with the weight issue and you could have a mode where it engages both the ebike wheel motor and the propellor for extra speed hopefully without making it too unstable Alot of mess im not sure how to word it better.
Before going with engine upgrade, please put this on small flat bottom boat and try it on water and snow. I have few of these engines, older models tough and making air boat would be nice, but i dont know anything about propellers and how much power it takes to move something like that.
It looks "crash-able". I'd want full leathers, helmet and gloves for the velocity test. You should be able to approximate it if you know the inch pitch of the props as it should eventually get to 90+% of that pitch X RPM ... depending on frontal mass, rolling friction etc. Fast enough for leathers!
@@D2O2 90% of prop pitch to actual speed given enough time ... but yeah, 90% is high. Efficiency of fuel burn to vehicle distance would be around 10% best case.
2 года назад
I would also add a stronger rim to the fan screen. If something happens and the fan hits the ground, you don't want the propeller shards flying all over the place.
@TechIngredients Just what exactly is the formula for converting Geekpower to torque? 😄 You were having such a good time on your contraption there, I wish I was your neighbor!
I guess the next obvious iteration would be a paraglider wing. Your flying car. Oh yeah, an underway chute deployment apparatus. A great James Bond seen, a car chase where you drive off a cliff, pull the chute and fly away. 😁
I'd love to do a clutch drive (centrifugal, belt, or traditional) on a recumbant. All the fun of a motorized bike but no balance issues and comfortable (and a much bigger motor with lots of torque) Either 4 stroke like this or a big 80-100cc two smoke chainsaw motor.
I actually had the idea to convert a pair of motorcycles, probably dirtbikes, into a recumbent bike, basically take the front fork off and use the mount to secure the rest to a frame. So you'd have two fully independent drivetrains powering the rear wheels. There a million and one issues with that, not the least of which being visibility and heat with the driver between the two motors, but it would be stupid fun. LOL
Another reason why loud motorized vehicles get a lot of looks: When something suddenly screams at you it triggers a bit of a fight or flight reflex and it makes you watch for potential atackers. (Try to not look at a loud motorcycle for example, it will take more willpower than you think). Not everyone who looks, likes it. I still like your projects a lot and appreciate the videos!
You guys should wear a helmet, just in case, especially when letting other testing it. A wider wheelbase or something like a go-kart chassis would make it safer. Also they said -Don´t stand behind it! Not very practical on public roads.
WARNING about using a setup like this. I showed this video to a lifelong friend who was a bicycle shop owner for many years. He pointed out that this type of setup is nothing new and that in fact it is rather dangerous. Don’t jump to to a quick conclusion and stop reading this thinking that I am going to start into how dangerous a spinning blade is to have behind you. Well it is but for the most part only after you crash. The problem is where the thrust is coming from as it is pushing you at a point where it has leverage above the centerline of the weight distribution of this three wheeled bicycle. If you have ever ridden a 3 wheel ATV or a 3 wheel bicycle like this you would understand how easy it is to pick up the inside rear wheel on a turn. Now add a pushing thrust point that has leverage above the center of gravity and you have a major face-plant device where a accident is just around the next corner. So you are cornering under power, the inside rear tire lifts up , at the point you realize you are in trouble you lift off the throttle and thats too late as you are already being powered into the ground as the fan behind you does not instantly stop. So you hit the ground followed by the fan and fan shroud that will collapse in against the fan blades sending carbon fiber shards all over the place. Not good. The way a 3 wheeler with your two drive wheels behind you is why 3 wheel ATVs were outlawed. The way they roll over, and it is easy to do, makes for a really bad crash. Its why the new breed of street 3 wheelers have the two wheels in the front for stability. Yes you can still roll one of those but they are not as easy to roll as the 2 wheels being behind you. Being the owner of a recumbent style bicycle I have one other warning to pass along about the propeller engine machine. Sitting down and back on a 2 wheeled bicycle you need to keep in mind that most if the weight is on the rear tire and its a lot easier than it is on a upright bicycle to lock up or skid out on the front tire and crash. On the three wheeled propeller driven bike the engine is mounted back by or even slightly behind the rear axle this adds to the problem of the traction you are getting on your front tire. This leads to a problem of understeer known in racing as a “push” in a turn and the reaction ti this happening is for the rider to turn even more into the turn and that simply compounds the problem of the front wheel that has already lost traction. Then when that overly steered front tire catches traction, over you go. Overall this is a really dangerous design that should NOT be tried. Electric power would be a much better idea with the weight of a hub drive being on the front and the batteries being mounted below the center of gravity and forward of the rider.
Recumbent bikes and three wheelers in this configuration always gave me the whillies, so seeing this video is about as fascinating as it is frightening.
I used a weed eater 30cc engine with an RC 16" 3 blade pusher prop on an old 10 sp road bike. Mounted the engine on the luggage rack in the back. It was capable of about 45-50mph but I kept it to 35mph most of the time.
Yeah, thrust acts as a force, and as F=ma, a=F/m, force is (relatively) constant, mass is constant, acceleration is constant. Gets faster and faster. Good observation. This channel is an absolute trove.
"Stay safe. Happy trails. Watch this minor on this really fast bike without a helmet." I don't get it, you're otherwise always very safety-minded. Why not here?
I would wager a bet that the prop would be more efficient at a higher rpm than the engine can produce. The new Predator 224 does share parts with the 212. A new aluminum rod and lightweight flywheel allows you to spin these things up to ~7500 rpm(after removing the governor).Toss in a cam designed high rpm power and you’ll have a real monster on your hands. Of course, just putting a centrifugal clutch and chain driving the bike would be more efficient. It’s nowhere near as cool though!
@@loddude5706 Theres no way a ~7 hp engine can spin a prop that size past the transonic wave drag regime. I would be surprised if you could exceed critical mach number lol.
@@brandonb6164 supersonic has nothing to do with size of engine. Tip speed is a critical part of propeller design, . What your saying is backwards. Most airplane engines if geared have the engine running much faster then the props. My experience says that size prop is good for about 3500 rpm. The engine can do twice that. Otherwise you get noise drag and prop failure.
@@jbird6609 the power required to spin a prop of a given shape increases proportionally to the square of the tip velocity, which itself is proportional to the diameter. That means as you increase the propeller diameter the power required to spin it at a given speed increases massively. Furthermore, as you begin to have compressible external flows around M0.7 the drag coefficient increases enormously. Engine power is directly related to how fast a propeller can be spun. That’s because the propeller does work on the air, and the amount of work that can be done in a given amount of time is limited by the engine power.
This is awesome! BTW I have full notifications on for your channel and this is the first video I have got a notification for in about 8 months fyi. As always love the channel and can't wait to see one of the jet engines on here or even a turbo fan ;)
This is only the second video of yours that I’ve seen but I’m already getting the feeling that this channel will provide most of my preparation for our Mad Max future.
Your videos remind me of when I and my friends were 17. When we meet nowadays (45 years later) we of course still talk about these wonderful, dangerous, and crazy times! 😎
This is somewhat odd and also fairly amusing, very retro for your channel. But since it is your channel, I am still looking forward to all the stuff I can learn from the process! Apropos of nothing and only because I am here right now - some other channel recently mentioned the high environmental cost of carbon fibre and that hemp or flax can be used. For a future project, that might be of interest for your channel? Whatever comes next, it will be good!
I was wondering about that maximum permissible axial load on the crankshaft would be? Is there is a thrust bearing in there? Or are the main bearings tapered roller bearing? Thanks Glenn
I made something close to this several years ago as a proof of concept project. Mine was much more radical. Used a cheap walmart bicycle powered by an 80cc 2 stroke boxer twin used in giant scale rc planes with and advertised 11hp, would spin a 24" 12 pitch pusher prop . to over 8000rpm. Had no problem keeping up with traffic on a state highway 55~60mph. Lol when you talked about messing up your shop. When I fired mine up the first time it blew most of my tools and supplies off the wall across the shop. Deemed it too dangerous to continue the project. I called it an Aerocycle.
Take a look at that shot of the last cornering around corner of the building. The outside tire deformation. Might want to consider small motorcycle tires on rear. Looks like more fun than versatility.
Why didn't you mount a vertical rotor on a mast, placed at the center of gravity of your vehicle. For steering, a swivel-mount of the propeller, coupled to the handlebars might work fine. Then, you could go airborne in autogyro-mode. Of course, a transponder and a aeronautical radio is strongly recommended. Who wants to become a UAP?
Thanks for another great video! Measure the thrust! That's barely taxi power. You could get a lot of good ideas and safety tips from us paramotor pilots. Not unusual to have the fuel tank right behind your head on a paramotor. Make sure you stress the importance of making sure the throttle isn't stuck open when the engine is started. Even with that cage the most dangerous place for bystanders is perpendicular to the plane of the propeller. I had a propeller explode one time. Fragments were found 30+ feet away on each side (it was at full power on launch). Also I don't think that prop is matched well to that engine. I suspect that engine could put out a lot more power but is limited by the prop. My paramotor engine is a Vittorazi Moster 185cc single cylinder 2-stroke that produces 25 Hp @8500 RPM with a reduction drive of 1:2.87 swinging a 2 blade 130cm prop. Puts out 175# of thrust, strapped to my back. The draw back is it's not as reliable as a 4-stroke and needs frequent maintenance and rebuilds of the top end every 100 hours and bottom end every 150 hours. 🙂 Also, HELMETS!?!?! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-d0DYIi4NOGQ.html
Thanks for the feedback. We did measure the thrust @ 32# at 4,000RPM, direct. That's maximum for both the propeller and engine, so they're well matched. Not bad for that diameter and 5.5 HP.
So, I'm only about half way through the video and haven't read any of the comments. My initial thoughts are, better brakes and I wonder if it would be quieter or more efficient with an electric motor?
On a Trike, Is there any difference between having two wheels back vs two wheels front in how easy it is to tip over when you turn? I feel it is about the same but when you do an emergency break while you turn then I believe it is safer to have two wheels in front. What do you think?
If you have two wheels at the front, you have to make much more complex steering. If you are doing that, you might as well leave 2 wheels on the rear as well. Three wheelers don't have to be unstable, just look at all the Huffy Sliders and Drift Trikes that people make... it all about getting the center of gravity down under the wheel's axles.
@@johncoops6897 Thank you for the response, John. I'm thinking the steering could be on the back for a two-wheeler in front but still, it would be complex as you mention. Then you would also have to invert the steering so that when you turn right then the wheel in the back turn in the opposite direction. I would really love to buy an electric trike but they are far too expensive at the moment. Imagine having solar cells on the roof and having them charge the battery when you park it. (And then it gets stolen. Dream crushed)
taxi the runway! 🤣 no seriously tho, flawless victory. sounds amazing. pure genius. air boat? this would be awesome on my 10 foot inflatable raft! yes im making an air boat.🍻🍻🍻🍻
Another commenter mentioned redesigning this into a bicycle, and I strongly agree. The stability of a bicycle will be a huge benefit to the potential speeds you could get with your upgraded 20-25 HP motor, cornering will be a lot safer and faster that way. As always, I love the work put into these videos, as it stands this project is extremely cool and while not entirely unique, it's unique enough to merit my rapt attention, and I'm looking forward to phase two.
The kind of turn that Tech Ingredients is talking about, when that force makes your body want to go outside is called the centrifugal force. It's an artificial force that's created when you make a circle turn like Tech ingredients mentioned. For example, when you put clothes in your dryer and start it up, you would see that your clothes would want to lean outwards all the time. That's exactly what's happening when you are turning on that bike which is why tech ingredients is mentioning to slow down. It perfectly makes sense.
This conjures up a few things that have been bouncing around my mind for awhile. Air resistance is the biggest obstacle to higher cruising speeds on bicycles and I've always wondered about using a fan and a nice streamlined shape and fairing would improve efficiency once air resistance becomes the limiting factor. I know MIT used an air propellor to circumvent water cavitation and set a speed record for a hpv boat speed record. I believe the boat was named the decavitator. I believe they used a hydrofoil to lift the hull out of the water as well. Ultimately I think putting cyclists into a tunnel with the air moving in the same direction as they are moving accelerated by the moving bodies of the people using the tunnel would have a lot of potential. Similar to the idea of a hyperloop minus the vacuum with a circular loop to channel the air currents. In this way cyclists would actually be helped to accelerate to higher speeds by the moving air and once they reached a fairly high cruising speed the energy that would normally be lost to air resistance could be used to accelerate the air in the tunnel.
