LabRat Scientific

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@pavanalur2721 Күн бұрын

Very scientific😮😮😮

@d.nagendraprasad9112 11 күн бұрын

👍🏻this is very good experiment.

@camronmiller1382 12 күн бұрын

Dude where have you been since I've started this hobby, I coulda used this info years ago, prob woulda saved me at least 10 or so rockets that went ary. Thanx and keep em coming

@nikoortega6300 12 күн бұрын

I wish that everyone on earth would watch this video

@nadsongomes823 15 күн бұрын

Your content is amazing. Excelent video. Thanks.

@johnconnor6735 22 күн бұрын

I don’t understand why you’re moving the center of gravity over to the center of pressure. Was it just to disprove the shadow test? If you find the center of gravity of the rocket, dill that be enough to stabilize it?

@johnconnor6735 22 күн бұрын

So hammas rockets blow back on them because they don’t take into account center pressure or even center of gravity?

@AngelicaBagol 26 күн бұрын

what is the title of your experiment

@SIDDHANTCPATIL Ай бұрын

Too good ❤❤❤

@SasukeKichiro Ай бұрын

Sir, i can not speak English but i want to know where is the position of propelan and parasute. Hiw to calculate the position ? Thanks

@alk7696 Ай бұрын

I love your videos, I wish my aero classes would do your experiments.

@mustafachouaib413 Ай бұрын

Loved the video! Very informative.

@poriyakhanzade Ай бұрын

thank you for sharing your information

@chaoli6596 2 ай бұрын

could any one explain why a cone top generates lift?

@GJuu-jd3vv 2 ай бұрын

I thought bending should be considered as well. Also glued wood joint is not a pinned truss structure.

@chris27gea58 2 ай бұрын

I have my doubts about an 'exact' cancellation of forces here but an interesting result none the less. The idea of lift being generated by the acceleration of air across (the actuator disc of) the propeller blades was made clear by using the accelerated air behind the propellers to then defeat the lift force. The way lift was generated and the way it was defeated were very different, however. Are you trying to say anything in particular about that accelerated air behind the propellers? I trust that you aren't suggesting that the accelerated air behind the propellers is part of what allows the drone to fly. Surely, it is just the consequence of the propeller doing its job.

@Whatever-o2y 2 ай бұрын

Damn u r toooo gooddd

@Harsh-wj8wf 2 ай бұрын

LPG gas cylinders deo cylinders and all other things

@Harsh-wj8wf 2 ай бұрын

Real thing is the mechanism of Noozel that can change everything that we want

@Harsh-wj8wf 2 ай бұрын

Gas and other things may be used in terms of heat and cold i.e. thermal conductivity and high and low . Stored in the form and removed out like a injection by pump.

@Harsh-wj8wf 2 ай бұрын

We have to try to use the mechanism of noozel in form applying and making other models that provide an alternate or modified mechanism in the process

@motivation7944 2 ай бұрын

Great work sirr

@dinotherando1691 2 ай бұрын

I had to leave a comment because THANK YOU I finally get pulleys, love that you show things by experiments too!

@ermuhambetcalmenov8104 2 ай бұрын

wow, thank you sir

@eduardopozos 3 ай бұрын

Thank you so much

@spinop 3 ай бұрын

why the sound is from left channel only

@richardchambers256 3 ай бұрын

Doesn't the center of pressure move when the rocket burns up its propellant? Can the CP move back so far it will become unstable at higher attitudes?

@labratscientific1127 3 ай бұрын

The rocket aerodynamic configuration does not change as fuel is burned so the CP stays the same, but the rocket's CG does change. For a rocket using a solid fuel rocket motor, the CG generally shifts forward as the rocket motor gets lighter. This tends to increase the stability since the CG moves farther away from the CP. As the air thins as the rocket ascends the fin lift tends to decrease and the rocket becomes less stable.

@richardchambers256 3 ай бұрын

@@labratscientific1127ok great, thanks for the clarification.

@keywestskoko 5 ай бұрын

Can you explain how you arrived at a Gravity constant of 1.41e15 ft^3/s^2? I cannot verify that value for G anywhere?

@joseluisayerbe4537 5 ай бұрын

Interesting for children, but tell they must develope this object for astronautics purposes, not as weapons ...

@LovelyNature-yv5op 5 ай бұрын

Great sir

@shanepiantek 5 ай бұрын

Is there a specific lenght for the rope or how do you know your rope is long enough for the spin test

@paulorocha7801 5 ай бұрын

Congratulation. This is the best explanation i found in internet.

@zzuraish 5 ай бұрын

Why I just found ur channel 5 years later, u should have more subscriber, sad seeing that ur last upload was 5 years ago 😭

@dj-no 5 ай бұрын

what just happened

@TuyenNguyen-zf3sn 5 ай бұрын

Thank you very much. Great experiments. Very educational. I hope you continue your work to share your knowledge

@SUBSCRIBE-ITSFREE Ай бұрын

hi r u still alive?

@alans172 5 ай бұрын

5 minutes was enough to determine that this is not worth any more of my time. He doesn't realise that a wing does not operate in a tube. Or that his acknowledged concern about the incompressibility of air is indeed a show stopper. Conservation of mass in a tube has absolutely nothing to do with the generation of lift.

@Polypythat 5 ай бұрын

This is a terrible take. The first 5 minutes are spent demonstrating that people's knowledge isn't flawed, but rather air can act in different ways in different circumstances. He caps it off by stating that in open circumstances pressure and velocity can adjust to allow density to remain constant, therefore incompressible. Conservation of mass absolutely is applicable to lift generation, as an airfoil relies on it to generate differential velocities and therefore pressures on the upper and lower surfaces, which is the basic principle behind lift generation. I'd genuinely recommend taking another watch, this video is significantly better at explaining the principle, supported by experimentation, than any of my previous education.

@alans172 5 ай бұрын

@@Polypythat You do yourself no favours by being an apologist for this nonsense. Conservation of mass in an ideal fluid, (incompressible, inviscid etc.) led Bernoulli to his now famous but poorly interpreted principle. Bernoulli's principle states that in a moving fluid, (and he only worked with water) a change in flow rate is always associated with a pressure change. What the principle doesn't say is that a change in pressure in air (the highly compressible form of a fluid) is always associated with a change in flow rate. A change in pressure in air can be associated with a change in flow rate, but a change in pressure in air can also be associated with a change in volume (by evacuation or compression) or a change in temperature. It's a case of A always results in B but B is not always associated with A. All dogs are animals, but not all animals are dogs. A change of pressure in air does not have to be associated with momentum, velocity or acceleration: think about your tyre pump. Think about heating a container.

@arnulfolopez8015 6 ай бұрын

Thank you

@kareemsalessi 6 ай бұрын

12:00 great, but once it launches and loses mass from the bottom up, how is CG-CP balance maintained???

@fahimnabeel606 3 ай бұрын

Oooo that's a good question

@schwarzk6416 6 ай бұрын

Thanks! Helped a lot with understanding truss problems

@MrBigMan25 6 ай бұрын

this is just me changing orbit in ksp no ifs ands or buts this is all i use when prograde and retrograde

@titusrider7948 7 ай бұрын

Agree with another viewer's request to see and understand how the wind tunnel works ?

@titusrider7948 7 ай бұрын

Outstanding analysis and video quality ! Your serious about this hobby, terrific explanation 😊

@titusrider7948 7 ай бұрын

Excellent video lesson ! Not only a great video on what is center of pressure but also why it is important to the flying characteristics 😊

@rodrigopropp 7 ай бұрын

thank you it helped a lot

@aszasq3150 7 ай бұрын

F(ab) goes down right? it is already proven in this equation 6:49 so why does you calculate it goes up in the other equation? 7:35

@niceguy9444 2 ай бұрын

because it is in tension. one end goes to the support (Point A), while an equal and opposite force goes to joint B. Newton's third law

@gastonbarouille767 7 ай бұрын

Best teacher I ever saw on YT! Few resources and tangible explanation makes invaluable information transfer to everyone! Thank you so much for sharing!

@RICREYNOLDSMUSIC 7 ай бұрын

By the way, thank you. Just a thought though, would it not make sense to take away weight to enforce the center of gravity instead of adding? That would help for speed.

@RICREYNOLDSMUSIC 7 ай бұрын

I am a distant relative of the Lee family from the same area. Most of my family on that side lost their lives in Coal mines. I have fought, starved, and survived that life to work in the aerospace and military supply area. I was on the Trident missile program and Raytheon missiles. A late starter at age 32, I am a living example you never give up and fight until your last breath. I am now with a a break-off company from Raytheons best inventors to help with innovation and new future ideas. We are part of our ancestors and though we improve on those characteristics, we should still be thankful for the sacrifice they made.

@kh40yr 8 ай бұрын

So, build your rocket, with everything that you want it to fly with and in the approximate location of where you want your items to be. Then "teeter-totter"(highly scientific) static balance it on the table, and mark that spot. Take your string and tie it to that balance point, and give it a swing. If it swings straight into the airflow,,your getting closer to flight. Once that's set,, start moving the string back(twoards the fins) until the model goes unstable to see where the CP is to make sure you have the body tube diameter margin away from the CG. Yes??.

@lr21643 8 ай бұрын

What effect do the walls of the tunnel have on tests like these? I recall that the NACA* guys had some way to compensate when testing airfoils, but I don't know what it was. *Before NASA. Lots of great info dug up by them.

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