Okay so for introduction, I am an electronics technician of 17 years, I have heard the airship idea, and I think this is absolutely achievable.
And we are going to post our plans so other bears can build their own
So I'll get started, for prototype 1 would we want to do a helium, hydrogen, or hot air build?
I'm thinking hot air to start with, as (H) is kinda volatile and the ( He ) can be difficult to procure
History of airships
Hot air does indeed have ubiquitous energy sourcing - hot air balloons use propane for example. It would require a lot of propane however. 1hr in a hot air balloon is about 30 gallons of propane, depending on the size. And those aren't directional like airships - they ascend/descend to different layers of wind to change their direction. I assume an airship would use more as it propels itself laterally beyond what the wind alone supplies.Hydrogen propelled by diesel might be the way to go as far as bang to buck if the volatility problem can be solved. Helium does indeed sound expensive due to scarcity - not the kind of thing one can depend on when there are weak supply chains. In WWII for example the countries of Europe couldn't get Helium due to the US banning the export of its Helium so they just used Hydrogen.
This is just based on info I read today by the way, I'm no expert.
Then there's building the rest of the ship itself. Ideally there'd be shipyards to build and maintain them in at least two areas.
Is there a way/process to "distill" or "pull" Helium out of the atmosphere?
The body of the airships i imagine to be full fabric and sewed to be rigid in the same manner as a zodiac boat SEALs use. the rigid support tubes being of higher pressure than the main reservoirs of gas. similar to how a bounce house is inflated.
I like the diesel Idea for propulsion.
Disc shaped balloons can produce more lift than the usual cylindrical/hindenburg type designs.
Helium is a byproduct of natural gas production in the earth
Living in upstate ny we kinda sit on a lot of it I think, wonder how easy it would be to mine it
How to obtain helium from the earth^^
But making hydrogen is super basic, its produced when water boils, oxygen and hydrogen are separated, the hydrogen rises as it is the lighter element, we could do this with electrolysis, or boiling water til it evaporates
Only downside is it is fucking volatile as hell, I've done this before with a balloon and a fuse and it makes quite the fireball
Looking at this stuff got me checking out hydrogen as well.
Hydrogen as a fuel for engines is also a very simple conversion. Having the alternator run the electrolysis and feeding the exhaust water back in to the tank could be a useful and cheap system to run. I think it works with diesel engines too.
I’m digging the idea for the bearskin rug look haha
Nice, what are the odds of 100% hydrogen being effective in a diesel?
Does hydrogen combust at high pressure like a diesel does?
How a hydrogen engine works^^
Remember the greater you compress a volatile gas, the greater the concussive force if it explodes
But from the above video he said he needs to increase the pressure to 5 atmospheres to use in his motorcycle engine
Useful data for designing.
Diesels engines work on compression and the chamber can be couple hundred psi during ignition. The pressure shouldn’t Be hard to reach. If anything the temperature needed to ignite hydrogen is about twice what’s needed for diesel fuel. So in that case we mix biodiesel with hydrogen, just enough diesel to spark the hydrogen.
With the hydrogen providing most of the power the diesel fuel should last a long time.
I agree, diesel ignites around 210C and already is a common technology, we should use biodiesel to fuel the propulsion system as to prevent having a bomb above and below deck since getting helium may be too difficult for the envelope and we will probably rely on H2 for the buoyancy.
Hydrogen assisted is probably still a good idea as the weight required is pretty negligible compared to the diesel engine.
I like the idea of using the same materials as the RHIB for the envelope , as a former SAR swimmer I have witnessed firsthand the durability of them and can vouch for their endurable nature under constant seawater and UV.
I would like to use a multiple envelope system so that some can pop and we will just sink instead of crash