WE USED AN AUGMENTER ON OUR PULSE JET!

This is an update to our previous video on our pulse jet engine.
In this video we add an augmenter to the pulse jet.

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[xjet]

Based on my own work, the spacing is wrong (too close) and the augmentor is also a little small. I've seen thrust improvements of over 40 percent static thrust with augmentation on a pulsejet engine. When the augmentor is too close it affects the reverse-flow in the engine's tailpipe and that reduces the power -- offsetting any gains from the entraining of extra mass.

[yermanoh]

your neighbours are really going to love the pulse detonation engine, that thing will shake your fillings loose and possible unmoor your workshop from its foundations

[vipondiu]

Imagine being the neighbour to these guys on one side and to Styropyro on the other side. It would be a noisy, but very entertaining existance! I would be over the fence asking about their constraption of the week and if the flames are normal

[Trainwreck]

Putting the chocks with the ramp towards the tire was the correct move. If you put them the other way, there was a much higher chance that the trailer just pushes them forward and they don't stop the wheels from rolling. If you put the ramp towards the wheels, the weight of the trailer presses them down into the ground and basically guarantees that they can't slip.

[spamviking]

I think the entire assembly needs to be in motion for a noticeable effect. If I recall, there needs to be air flow through the ring for it to enhance the pulse jet. Would be interesting to rig up some air movers to push air around the assembly and through the augmenter and see if there is a more noticeable effect. That said, I agree with the weight likely not being worth it given how simple the pulse jet is to begin.

[charleswise]

I like the idea of showing the disagreement on video. Realistic, and necessary!
For most people, learning how to disagree is very important! I think showing more of this can help!

[colonelingus]

I love how engineers push buttons and how their body language is. It's unique and you can call out a heavy nerd engineer in 2sec with it. I love it. So adorable.

[barongerhardt]

A lot of people are suggesting you need air flow around the augmenter. That might have some effect, but the point of the augmenter is to give a low speed increase to thrust and they become less useful as speed increases and reduce overall top speed.

[SammyGDude]

You two are so fortunate to have this time together doing these projects. 💪🏻💪🏻💪🏻💪🏻💪🏻

[guard]

I love the difference in physics intuition demonstrated by the brief argument over ramp positioning.

[QuantumZadokViking]

Why not think that as the pulse jet is moving, the increased amount of ram~air effect is substituted by the electric fan; however, I believe there also needs to be a substitute for the air pressure being directed between the outer surface of the p.j. engine & the opening of the augmenter, possibly creating some venturi~like effect for some increase in pressure generating more thrust? I would imagine there may be a possibility of an increase in thrust... p.s. Great job with all you geniuses do! Thank you all.

[revilolavinruf]

Funny how every father and son argue the same way. My dad and I always butting heads on projects together! XD

[keg]

1:15 A bladder of water under the table. Fill it up and you increase the mass into the ground. Then just empty and no worries…

[Sypher]

Well, that's not what I was expecting at all! The excitement to see good old 'number go up' was immense. Guess I'll have to hold it for the detonation engine. That neighbor should love it even more 😅

[zgd]

I applaud both the literal and figurative boatanchor

[RidiculousCircusoftheAbsurd]

Your unbridled enthusiasm and formidable intellect are astounding ... The addition and presentatiin of your content has
markedly Increased the value of the youtube hood! Bravo!

[andymuller]

Priceless smile on both faces of you, valuable father sin time with a very interesting subject.
You did say how much louder it gets, hope the neighborhood does not suspend you….

[dgram]

A null result is a result. And good call on placing the chocks in the correct direction. You want to increase the friction against the pavement by increasing the normal force.

[johnhosky]

I believe the augmentor has to be some distance away from the end of the exhaust. Not necessarily fine tuned. It’s like from blowing the air at an opening it pulls in 4x the amount of air with it when there’s a gap but if there’s no gap it’s not pulling in any extra air. It’s Bernoulli Principle. Please try again with the gap to see if it works!!!!

[jimsworthow]

The Germans and the Americans tried the idea of an augmenter. The idea went away after flight testing because in a flight test, aerodynamic drag/friction subtracts the thrust gained by said device. The device can add thrust to a static test, but not dynamic in flight.