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Propulsion / Re: Aerojet Rotating Detonating Engine
« Last post by marauder2048 on December 10, 2018, 01:29:47 pm »
In those test rig enclosures, I find the pulsed





and continuous



to be hard on the ears.
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Propulsion / Re: Aerojet Rotating Detonating Engine
« Last post by sferrin on December 10, 2018, 12:12:20 pm »
One would think it would be noisy as hell.

The kHz operational frequency produces an audible screech.

But would it be louder than the Thunderscreech?   :D
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Propulsion / Re: Aerojet Rotating Detonating Engine
« Last post by marauder2048 on December 10, 2018, 12:05:27 pm »
One would think it would be noisy as hell.

The kHz operational frequency produces an audible screech.
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Propulsion / Re: Liquid Piston Engine
« Last post by Arjen on December 10, 2018, 05:22:00 am »
At 1:29 it says '4-stroke HEHC cycle' - to me it looks like a 2-stroke cycle. Maybe I misunderstood that first clip?
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Propulsion / Re: Aerojet Rotating Detonating Engine
« Last post by sferrin on December 10, 2018, 05:21:03 am »
One would think it would be noisy as hell.
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Propulsion / Re: Aerojet Rotating Detonating Engine
« Last post by Foo Fighter on December 10, 2018, 03:27:54 am »
It would be interesting to see a diagram of the process.
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Propulsion / Liquid Piston Engine
« Last post by fredymac on December 09, 2018, 02:00:05 pm »
Liquid Piston engine.  The name seems to be a marketing hook but it may relate to the way fuel/air is injected into the rotary piston as a delivery path to the combustion "nooks" built into the main housing.

They seem to be progressing slowly but steadily and are targeting military/UAV applications as commercial/automotive markets are resistant to new engine architectures and require serious financial backing.







Phase II DARPA contract for a diesel 40HP UAV engine starting at 4:30 mark.
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Alternative History and Future Speculation / Re: The other Lightning
« Last post by zen on December 08, 2018, 02:22:53 pm »
Side-by-side was explored - in the multi-role PL.1.

Chris

Ahhhh!!!!!!!!!!!!!

Now that is intriguing.
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Alternative History and Future Speculation / Re: The other Lightning
« Last post by CJGibson on December 08, 2018, 11:42:02 am »
Side-by-side was explored - in the multi-role PL.1.

Chris
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