Thursday, September 04, 2025

There's A Reason That There Aren't Any Battery Powered Aircraft

 Or Rockets for that matter.  I mean, where would you recharge them when you are in flight or on Mars?  The interesting thing is that once the charge has gone the aircraft or rocket probably still weighs about the same where conventional ones get lighter as the fuel gets used up and the stages drop away from the main craft.

It's the insanity of the Lorries and Buses that are now battery powered and the Ferries (no really) and that is the amount of electricity you require to charge them up.  The lorries and ships need megawatts not paltry kilo watts like at your house.  The Ferries had to be cancelled because no one had worked out how much electricity was required nor, indeed, how they were going to get it to the terminal and electric and water don't mix well (I learned that at Electrical Engineering College by experimentation - don't ask).

I see someone things that liquefied hydrogen could be substituted for kerosene but at 2000 psi I doubt many would like to be sat anywhere near that given it's other corrosive properties.  

The craziness is that no one asks basic questions about how heavy these batteries are and could you really use electric engines to power an aircraft and how meaty would the battery have to be to produce the energy you actually need to take off and fly?  Like the lorries they are trialling, the wight means that the loads that they can carry are diminished by around 25% - and it takes ages to charge the batteries.  They do not normally have enough charge to do a full day's work either.  

The practicalities of battery power can be seen in your rechargeable toothbrush or other battery powered home appliance.  They deteriorate over time, just run out without warning and take an age to recharge.   They are noting like mains powered or petrol powered tools (if you use chainsaws and drills etc) and you have the inconvenience of  less and less output over time.

We need, somehow, to work out what to do but the blind push to reach net zero is fraught with problems and batteries are not going to be the long term answer.  

Oh well, I haven't even got started on how powerful these cars, lorries and busses are when they are charged up.  Because of how they are coupled up, they can accelerate a lot faster than you think and so many people get caught out especially if they have a heavy right foot.  Have fun!

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