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> In contrast, the internal combustion engine on a 172 makes enough heat to keep the cabin warm whenever needed Right, and it's always making that heat whether
by jeffrallen 5y ago
> In contrast, the internal combustion engine on a 172 makes enough heat to keep the cabin warm whenever needed
Right, and it's always making that heat whether you need it or not. So it's a good thing your avgas has a shit-tonne more energy density than my batteries because you're going to need it to waste all that heat.
Look, physics is physics, you can't cheat it. Which means pure electric is only good for short air trips (energy density), but there's plenty of room to make airplanes more efficient (internal combustion = waste machines).
So those who are busy saying it's impossible should get out of the way of those who are doing it.
- ampdepolymerase 5y agoIf you want to take a plane without constant heating, be my guest.
- jeffrallen 5y agoMy Zoe keeps my toes warm all winter long, and it does it 30 seconds after I turn it on in -20 c weather. My diesel needs 10 minutes to warm up the cabin. Heat pumps rock. Internal combustion engines suck. Fight me.
- vondur 5y agoHeat Pumps work best above 40F (4C), and after that they are not very efficient. I don't believe that would be a good fit for an energy starved system such as an electric plane.
- jeffrallen 5y ago> Heat Pumps work best above 40F [citation needed]
- vondur 5y agoFor year-round heating and cooling comfort, heat pumps work great in areas of the country with moderate temperatures. This is especially critical during the heating season. Once the outdoor temperature goes below 25⁰ - 30⁰ F, a heat pump can continue to provide heat. However, it will use more electricity to do so, which means higher utility bills. This is because there simply isn’t as much heating energy available as the outdoor temperature drops and the system will work longer to achieve the same indoor temperature. That’s why many air-source heat pump systems are installed with a supplemental heat source. Source https://www.carrier.com/residential/en/us/products/heat-pumps/heat-pump-efficiency/ https://www.carrier.com/residential/en/us/products/heat-pump...
- jessaustin 5y agoHave you ever experienced cold weather?