It will be interesting to see what (if any) of these design uses really catches on. Though boat and ship propeller designs have become much more efficient over the years, there is still a decent bit of slip and noise being created. Being underwater with a slow moving large yacht nearby would make you think it's several axes being pushed through the water, as you hear the rotation taking place.
It will be interesting to see what (if any) of these design uses really catches on. Though boat and ship propeller designs have become much more efficient over the years, there is still a decent bit of slip and noise being created. Being underwater with a slow moving large yacht nearby would make you think it's several axes being pushed through the water, as you hear the rotation taking place.
But really quiet is the Dyson bladeless fan style propulsion system. Potentially revolutionize both helicopter and drone development. US Air Force is backing it & Pratt & Whitney, Northrop-Grumman & Scaled Composites are involved https://newatlas.com/aircraft/jetoptera ... MAIL_ID%5D
Re: Interesting Stuff
Posted: 03 Feb 2023, 23:25
by johnny comelately
The Reaction Engine Intercooler
Is this the unit you fellows are saying is used on the Ferrari, Acura and others? It is about the rights size for F1 at point55 kg per second air throughput
Data (The mass figure seems to be a bit wobbly , so go on the wet mass, I guess)
Mass: 1,6000 g
Wet Mass: 1,860 g
Core Volume: Ø165 x 120 mm
Heat Rejection Rate: 100 kW
Charge Air Pressure Drop: 30 mbar
Charge Air Mass Flow Rate: 0.55 kg/s
Re: Interesting Stuff
Posted: 04 Feb 2023, 07:33
by johnny comelately
Bugatti 900hp contra rotating props, twin inboard engines, reverse flow cooling with inboard radiators, novel flaps and balsa wood!
But that is just the beginning of this saga...
Re: Interesting Stuff
Posted: 04 Feb 2023, 08:03
by johnny comelately
https://www.abc.net.au/news/science/202 ... /101891670
The 1900 Lohner-Porsche Electromobile, sometimes called the world's first electric Porsche, was in fact a hybrid.
Porsche 356 fit the bill.
America, GE employee...
So he bought one second-hand, number 50058, and nicknamed the project QP — short for "Quiet Porsche"...
I can see there being a few very upset oil companies once this takes off.
I always wonder what they're gonna do in cold climates with the water being emitted.
I guess its not much different to now really when it rains. Bit of salt on the road to stop any ice.
But with the potential of water freezing in the exhaust pipe I guess it depends how hot the water exits the engine in order to warm the exhaust pipe up.
Im sure there will be some additives you could use in the tank in order to stop it freezing too.
I can see there being a few very upset oil companies once this takes off.
I always wonder what they're gonna do in cold climates with the water being emitted.
I guess its not much different to now really when it rains. Bit of salt on the road to stop any ice.
But with the potential of water freezing in the exhaust pipe I guess it depends how hot the water exits the engine in order to warm the exhaust pipe up.
Im sure there will be some additives you could use in the tank in order to stop it freezing too.
Imagine driving around on a sunny day at -5 C and thousands of cars driving around droping water everywhere. Would make one huge skating rink. In subfreezing temperares, they might need to hold it, then drop it when the car gets parked. This way they can release it at the side of the road.
I can see there being a few very upset oil companies once this takes off.
I always wonder what they're gonna do in cold climates with the water being emitted.
I guess its not much different to now really when it rains. Bit of salt on the road to stop any ice.
But with the potential of water freezing in the exhaust pipe I guess it depends how hot the water exits the engine in order to warm the exhaust pipe up.
Im sure there will be some additives you could use in the tank in order to stop it freezing too.
They could even run the engine a few cycles with no gas before shutting down just to vent the pipe, especially if some sort of hybrid is being used
I always wonder what they're gonna do in cold climates with the water being emitted.
I guess its not much different to now really when it rains. Bit of salt on the road to stop any ice.
But with the potential of water freezing in the exhaust pipe I guess it depends how hot the water exits the engine in order to warm the exhaust pipe up.
Im sure there will be some additives you could use in the tank in order to stop it freezing too.
They could even run the engine a few cycles with no gas before shutting down just to vent the pipe, especially if some sort of hybrid is being used
mufflers vent water too, from the humidity. As long as you make the pipe wide enough and it heats up sufficiently when running.
I can see there being a few very upset oil companies once this takes off.
I always wonder what they're gonna do in cold climates with the water being emitted.
1 kg of gasoline (assuming C7H16 here), when burnt, produces 1.44 kg of water (7CO2 + 8 H2O). So... not much different? Does anyone know how much H2 would have the energy content (upon burning or "burning" in a fuel cell) of 1 kg of gasoline (upon burning)?
