Chapter 270 (2/2)

After finishi+ng the an thinking about how to coaret’s balloon order

With a price of one thousand gold royals for each balloon, its price was even higher than that of the steaine, while its production cost was actually lower The airbag was mainly a drawn picture by Soraya while the heoods In fact, Roland had already created a prototype and tested it in the factory courtyard: A hydrogen balloon which could carry Lighting and Maggie simultaneously and ascend into the sky

After repeated consideration, he finally decided to abandon the idea of a hot air balloon fueled by coal gas The needed equip process would also be very troublesome Moreover, Roland would have to import that coal from other cities, which for a small-scale production would be extreen which was so much easier to facilitate

He coated the test product with a single-sided water coating, which ensured that even after being burned, nothing would happen to the paper As a result, the whole air sac had hardly any weight while its flexibility was very outstanding In the experi the balloon, it would fear neither rain, iie even turned into several kinds of birds to throw vicious attacks against the balloon but it was still unable to leave even a s an iron needle were they able to pierce through theAnd since the construction of the air sac was very lithe, a hydrogen balloon with h to carry an adult

The only difficulty laid in how they would solve the gasification probleen bottle

Selling a DC motor for the electrolysis of water was iine could inflate all hydrogen balloons, which was obviously not that cost-effective If he wanted a steady flow of gold royals from the hands of the wealthy and powerful h-pressure bottles which could be refilled repeatedly

The air bottle itself was not difficult to build The usage of secondary material could beiron and wrought iron was good enough and with Anna personally being the one tothe bottle accurately also wouldn't be a probleenerations of air bottles had a pressure level of 20 on a bicycle pu but a fantasy, even the help of ten Qilins wouldn't change this, he at least had to obtain a high-pressure puh pressure inside the bottle wasn't enough if there wasn’t a way to fill the hydrogen balloon with it later

The high-pressure air pump was divided into a piston coed to the internal coy tree, while the later fell under the scope of turbine engines No matter what type he would try to research and develop, they would both be ti and laborious projects Until late in the afternoon, Roland finally ca bottle

The inspiration for it came from a news article he had seen before: A street vendor had been selling hydrogen balloons and used a en, which in the end resulted in an explosion The cause of this laid in the problem that the peddler had used diluted sulfuric acid and aluen inside of the bottle, but hadn't correctly calculated the amount of reaction Which resulted in the issue that the pressure inside the tank had becoe and had broken the bottle

Thus, the self-inflating method was to pour diluted sulfuric acid and an active en The commonly used metal in laboratories was zinc, while the one used to create en was alu this era So Roland still intended to use Lucy's power to dish iron The problem of its slow reaction speed at rooing the contact area (for exa thin iron pieces or iron powder), while an inner coating could resist the corrosion effect of the acid liquid that was inside the bottle

Thinking until here, he immediately drew a sie, the high-pressure bottle needed to be made as one whole piece, with only a raised threaded hole at the top, which could be screwed into a valve with a gas nozzle

By tightening up the enerated gas would have nowhere to go, which would result in that the pressure inside the bottle would reach a very i as they unscrewed the valve, the hydrogen would pour out directly into the airbag And the refill process would also be quite convenient After re liquid over a stove, the ferrous sulfate crystals inside could be cleaned out before it could be refilled with new reactant

Taking into account that diluted sulfuric acid is also an alchemy product, the refill price obviously couldn't be set too low

With fifty gold royals for one charge, and after buying ten charges get one free, Roland thought

TN:

Thank you Enryu for starting the , everyone’s help is welcome