excellent work here! I am especially impressed by how still the glass of water is. You've done an amazing job.

I watch this channel because you cover literally all the bases of topic discussed. Something that most other videos just somehow miss or go awry. Please continue to make these great informative videos for us all to learn from and be able to tell others to watch with confidence. And again, keep on making these videos !!!!!!!!!!!!!!

2 strokes are very sensitive to exhaust design. They need a tuned resonator to run well, the only downside is that there is a very small powerband. Thankfully your generator will operate at one specific speed.

Watched it to the end with the same smile. Very impressive. Useful to me for a UAV alternator on my fixed wing.

Thankyou for taking the time and effort to post this video. Forty years ago the only way we would have been able to see a video on this high of level. Would have been to watch NOVA on PBS. Now thanks to KZfaq and individuals like yourself we can just surf KZfaq. The video on sound cancellation was brilliant. Can't wait for your next posting.

I wanna thank you for all the cool videos that you made. You remind me of the cool science teacher who kept me interested in science and creating with my own hands most of my life. I think we are all being tested in ways that make me question my own reality. One thing for sure is I know myself and my reality and values are still holding strong. I really watched all of your videos sometimes 2 3 and 4 times. Thank you so much for everything.

Great video, really enjoying this series. Cheers!

Very interesting! Amazingly vibration free. Very professionally done. Thanks for sharing!

Loving the beverage glass on the worktable. I'm partaking as I'm watching!

Amazing as always. Thanks for the great and very educational content. I feel I see parts of the world with new eyes after binging your channel :)

This is a fantastic video series! Thank you for sharing!

So precise and articulated!

As a fellow engineer, I can only say you did awesome job here.

Love this video and the Members-Only jacket!

I love that. Probably the coolest hand warmer I have ever seen. 24 amps is nothing to sneeze at.

Very informative stuff. Thanks for all the hard work.

Very nice generator set. This fascinates me since I work on large gensets for the offshore oil & gas industry. It sounds so consistent, as well! The only thing I worried about was the engine cylinders overheating since the fans are blowing down, over the ends of the cooling fins and not through / between then as the original propeller airflow would have. Not complaining! Just an observation. All my generators are water cooled. :) Glad you tested by hand and found they aren't too hot! On our big gensets, the governor tuning is a very important part of the unit. It's got to be interesting tuning the Arduino to govern the engine based on voltage output. I hope you have / will go over that part of the build! Thanks again!

One of the best channels on youtube on this category! I really love your work!

You're wearing a Members Only jacket. I think you are actually a time traveler and that is why you know so much about advanced technology.

Excellent interesting video, keep it up!

Thanks to you to help us to understand the world

Have you tried the fuel consumption with the original exhaust? I have a feeling that the box exhaust is restrictive and not helping efficiency.

Just wondered if you could use the generators to perform the function of the flywheel on the engines i.e. do you need both ?

Nice project. There is something that I still do no get right. Considering the amount of power required for even a modest 900mm (15-16" props) - 6kg AUW class X8 drone, which requires 2-3 KW range in hover, I wonder how this engine-generator setup could be of any practical use as it must weigh multiple times the weight of the said drone while producing only about 750 watts. Or did I miss something ? What's the total AUW weight, fuel included of this engine-generator setup ?

Very nicely done sir! And I like your Members Only jacket. I have one also. I guess we are the last members of that club. Keep up the good work

Great video! We are interested to buy one of your generators when you are done testing and making videos. We really like the way yiu present stuff. Only a small idea that I have is to put a voice over after.

Great video. Thanks.

Love the Members Only jacket!

The look at 9:15 is priceless. I had that same look when Mommy first praised me for pooping the toilet.

I was just thinking I want to know how the vibration is and you put the water in the glass, good show old man.

Thanks to you. Good job. Exciting.

I think there needs to be a paradigm shift with resoect to hybrid quad copters. Instead of using the gas engine/generator to provide all of the energy for verticle propulsion, it should provide energy mostly to power a directly coupled ducted fan. Secondarily electric fans would provide vectoring and station keeping. This way, only a smaller amount of energy would need to be generated for a smaller battery complement. The ratio of gas powered thrust to electric could be worked out to best attain the amount of altitude control and efficiency. My interest is with high endurance platforms contain radio relay (repeater) equipment where longevity is the major concern. Secondly a power source for the repeater in tens of watt hours. What do you think of this approach? Can the engines be throttled efficiently?

Thanks very much for sharing 👍🏻

What is the purpose of the noisemaker .

WOW,,thanks for having your site. Im gong over all your videos and the motors are sold out so, how does one calculate esc to motor to power details for a perfect balanced system? Thanks Keith

stand still, look smug, nailed it :-) and one more sub, nice work

Trying to read your power outputs on the blue screens. Suggest a fixed camera for these. Also total kwh output per fuel used will give an efficiency number.

Nice work! Good power output using brush-less multi-phase motors as generator (rectified and filtered for DC output). Very low vibration.

Very cool! I'm planning on building a 10th scale rc car using this same type setup.

Hi, thanks again for a good video. How are you relating fuel consumption to generated power? I'm not sure what you mean by 20 to 1 and 10 to 1 ratios.

You should have changed(varied) the resistor banks while system is running to show the Arduino based feedback loop and battery stabilization. Otherwise this is TheOldTony of electromechanical channel. Thank you for your time and hard work.

It was really stable. The water had almost no ripples. Awesome!

Great work and thank you for posting! With all of the dross on the internet these days this is a real pleasure to watch.

Have you analyzed the output with an oscilloscope to hone the necessary electronics for reasonably controlling the dc?

9:40 on the left there is an allen wrench falling off the table, seemingly due to vibration?

What do you think about a hybrid drone with a rocket to get the drone to altitude initially and then the battery pack is coasting the motors for the flight allowing a longer run time to?

Would a typical 4-wire O2 sensor allow you to close loop the mixtures for increased efficiency? Would an expansion pipe on the exhaust allow you to move peak torque to the "set" RPM?

amazing vabration level！

wow this is brilliant

Seeing this wineglass, I thought you would enjoy some wine during the testing ;-)

Are you going to produce a "limited run" for market testing? About how much would you make these for (USd$)? Awesome progress you have made, very excited of the development. Thanks for the update!

You sir are heading in the right direction, i could see this type of tech on full scale passenger carrying aircraft, keep up the good work and i hope you inspire some people to get off their buts and do some stuff, including me : )

sub'd and thumbs up! I wish we lived close together ..... no doubt together we could create a device to exceed all the watts produced in "back to the future's Delorean". Great Job!!!

Maybe not part of your drone project ? But I have always thought of having a gas turbine powered generator , and other items . Thanks

Great smile, and yes, I love it.

RE Sound & Weight: Considering your great Helium videos, is it possible to enrobe the motor in a layer of Helium?

Tech Ingredients .. Thanks very much for your contributions! Rare are the persons that give without asking for doe, or that beg for money ... I'm sure you understand better than I can explain! anyway.. Thus far you're the first person doing uploads on youtube using RC engines for generatoration of power, I am very ignorant of electrical systems, but have often wondered if one could use RC electric motors as a generator source, i.e., use a .50 nitro RC engine to turn something like a 520Kv motor, if you'd obtain a substantial amount of of power to charge a couple 12v deep cell batteries, (time constraints/issues) and in turn use the deep cells through an inverter to run power for a home, I'm sure it would need to be "sized up" to run anything more than a high efficiency refrigerator, but with so many trying to make their own mag-motors/generators, RC has them already made for cheap, considering how much neodymium magnets cost! Your thoughts sir? Again, much thanks! Respectful Regards and Salutations, Mike

wow. impressive project

Thinking out of the box brings a turboshaft generator to mind. They are not cheap, and I don't have a list of your requirements or budgetary constraints, but if you use a turboshaft with reduction gears driving a generator, it would give you a pretty good place to start, since you can calculate the optimal size components that meet your needs. It would also be pretty cool if you ended up with a hybrid setup that uses both electrical and output shaft power to run the machine.

Thanks for sharing this videos! I think you’re doing an excellent job with your design, the way you couple the motors to minimize vibration is brilliant, no doubt you will get the power you are looking for. The one thing I don’t like is the design of the mufflers. two cycle engines need exhaust scavenging to reach pick efficiency, it would be awesome to see this generator run with a tuned pipe in each motor.

That's incredible.

so you plan to fit the whole contraption on a drone to power it in the air...?

Good info. So, the weight of the generator plus the weight of the fuel is far less than the comparable weight of lithium batteries with the same energy content?

I have done alot of work on this myself wanted to say that if you want to improve efficiency use mosfet rectifier over diodes you will have to build a circuit for any amount of current you get out of it.

I’ve been wanting to build a hybrid drone for years! Have you considered attempting to recover some of the energy lost as heat by using thermoelectric generators?

i have noticed that your load resistors are all in parallel. how would the voltage and current compare to two in parallel in series with two in parallel?

what can you power with that?

Great videos. Members Only Jacket @ 0:46!

It's been 3 years! any progress?

So excited!

Great great videos. Oh 2 stroke motors don't like boxy mufflers...They need a sonic blast back to help contain the new charge of fuel input.

Have you looked into the possibility of weight savings using fuel cells?

you don't have to worry about transition, you can set them at the optimum settings for the requirement and forget, you might want to idle them down for a little while before shut down

For the cooling, could a multi blades EDF type fan be integrated in the center of each flywheel?

Has there been any updates on this project?

Just found you, very interesting.

It's awesome. But why didn't you compress your audio track?

If the current delivered is that constant it is interesting how the 4 stroke engines would perform in the same kind of setup. 1:10 versus 1:20 is considerable. The propellors of the drone are driven by electric engines. So it would not be problematic that the engines deliver less of constant power throughout the 4 strokes instead of 2 x 2 strokes. Not sure if I describe it correctly. Hope you understand.

Excellent !

Hi, I want to power Six Hobbywing X8 motors on my DIY Hexacopter. I don't know math for Hybrid generator. I need recommendations for DIY Hybrid generator to power these Six Hobbywing X8 motors? Any help would be appreciated. Thank you

is that 10 to 1 figure consider the weight of the generator? and if so how much fuel weight/generator weight?

That's very interesting. Did you buy or salvage the generator/motor and what's the displacement of the gas engines? Would something like this work on a bicycle to make it a hybrid like for long trips?

Again, how does overall energy density of this system compare to energy density of a battery array of the same weight?

hanks very much for sharing

If you're running nitromethane, a good percentage of the "fuel" is oil to lube the engine. All that oil is going to end up in your glass sponges. If you subtract the oil content from the weight, you'll find your efficiency is a little better. Those mufflers are going to be fun to keep clean. Cool project.

Ótimo trabalho, saudações do Brasil.

I imagine with a well designed exhaust diffuser system and a good engine baffle surround this would be a reasonably quiet system.

Probably using 4 engines with props and servos controlling the throttle to the flight controller would be vastly more efficient. Also, the capability of smaller drones is really getting phenomenal, such as the DJI Mavic series.

any progress sir?

Hi, I would like to ask you what do you think about the alternative method to produce electricity using Fuel Cells, can it be an efficient solution?

Could you elaborate a little on the specs for the upgraded generators? Have you had any issues with non-sinusoidal (trapazoidal) waveform generation? Why the shift away from a hobby RC motor/generator?

For efficiency and weight conservation, it would seem that an Achates Opposed Piston Opposed Cylinder (OPOC) engine would maximize efficiency and minimize weight. What do you think?

Truly modern Two Strokes use a porting scheme that results in a stratified charge. You can identify them because of their windowed piston and dual intake carburetor. Both major chainsaw manufacturers, Stihl and Husqvarna, produce these engines in great numbers anywhere from 30 to 100 cc's. Their purpose is to reduce emissions but as a side benefit you get dramatically lower fuel consumption.

Hi There, what happened to this project? Was it unfeasible?

2 stroke motorcycle engines have a full circle crank and the racers do what they call stuffing the crank to boost performance and reducing vibration is a large part of performance optimization and this goes on in high end chain saws as well. I noticed that Boston dynamics is using a pulsejet engine in thier robots, these engines are much lighter.

Maybe put a transducer or that square plate with salt to measure or indicate frequency of vibration?

Thank you for the video. I really want you to continue this series about the hybrid drone. And I think there are many of us want so. Would you by any chance continue this saga? If not, could you please say a couple of words about why did you decide to abandon this project?

Great video, I was hoping you would pour a Belgian Dubbel into that glass though. :)

Cool jacket Daddio 😎😎😎

Those little engines rarely ever come with correct fuel jetting... Leaning them out will help... Also you could dissasemble the cases and fill in all the extra nooks and crannies with jb weld or a similar material , then machine or sand them smooth... Less extra case volume equals less waste...smother running too... These engines also rarely come with a proper squish area in the combustion chamber... You could mill the heads down some...increasing compression..and run the motors a little leaner still... You should also check out the youtube channel "2-stroke stuffing", about porting small 2-stroke engines...he'd probably even port some stuff for you... Proper porting for your purpose built engines would go along way toward efficiency... Btw..I really enjoy your ptojects..super good channel..