7 votes
Accepted

Does any know what kind of pump "Colossus" used for saving the Notre Dame Cathedral?

This is not a definitve answer, but since I went to the trouble to look it up I thought i might as well post what I found: Pretty sure there's no onboard pump As you can see this is a normal firehose,...
mart's user avatar
  • 4,771
5 votes

Why not use fire-retardant plastics everywhere?

Fire retardant fillers are pretty cheap; often cheaper than the base plastic (Alumina Trihydrate for example). Like anything in engineering though, there are always exceptions and functional reasons ...
ericnutsch's user avatar
  • 8,146
4 votes

If a fire-extinguishing bomb of sorts could be engineered or if a huge fire cover could be used, would they work better than the dumping of water?

Using explosives to blow out oil well fires was first used in 1913 and is still a widely used method for extinguishing such fires, which are isolated point source fires. The principle behind this ...
Fred's user avatar
  • 9,667
4 votes

How can I keep a Zippo lighter from losing fluid to evaporation or leaks?

Year's ago I took out the inside of my Zippo and closed the top, then slid a tight piece of heat shrink over the lighter case. Heated it till the heat shrink was tight the took a Razer knife and cut ...
Hacky's user avatar
  • 41
4 votes

How can I keep a Zippo lighter from losing fluid to evaporation or leaks?

The big issue is that Zippos aren't that well sealed, especially the lid which allows fuels to evaporate through the wick and it's this wick to air interface which is the most critical thing as the ...
Chris Johns's user avatar
  • 15.2k
4 votes

How can I keep a Zippo lighter from losing fluid to evaporation or leaks?

Higher temperature definitely increases evaporation rate. Keeping it away from body heat and not letting it heat up a lot from flame will keep the fuel from evaporating too fast. Other than that, ...
SF.'s user avatar
  • 6,135
3 votes
Accepted

Will deodorant flamethrower ever explode?

No, the flame can't go upstream back into the can and explode what is in the can. This is no different than the flame in your gas stove can't go back up the pipe and explode the whole distribution ...
Olin Lathrop's user avatar
  • 11.4k
2 votes

How is fire risk reduced in dense contemporary timber neighbourhoods?

They protect the combustible framing by cladding it in fire-resistant materials like gypsum boards. Fire code is an integrated and elaborate part of the building code. It assigns fire protection ...
kamran's user avatar
  • 22.4k
2 votes

If a fire-extinguishing bomb of sorts could be engineered or if a huge fire cover could be used, would they work better than the dumping of water?

It turns out there's indeed a product that uses explosives against forst fires: The system 2RS (After the developers, Chief Firefighter Dipl. Ing. Ries and explosives technician Rosenstock. The S ...
mart's user avatar
  • 4,771
2 votes

Is a powder fire extinguisher not good for CRT TVs?

A dry powder extinguisher will absolutely work great for CRT TV's or monitors. I suppose it might short out the HV capacitor, but why would anyone care? There is enough power in the cap to hurt you ...
Tiger Guy's user avatar
  • 6,881
2 votes

Is it really sane to drop buckets of water into a (CRT) TV on fire after unplugging it?

The risk of electric shock is that charge is stored in the high-voltage capacitors. The risk of shock occurs if you provide a path from one terminal to the other - only then can current flow. This is ...
Transistor's user avatar
  • 10.7k
2 votes

Consequential differences between World Trade Center (1973-2001) with steel columns and concrete columns?

As it stands this question is too open ended. If the exact same column positions and geometry were used but the material was concrete not steel, the structure would not stand up under its own weight ...
PM-14's user avatar
  • 171
2 votes

What materials could non-flammable (blowtorch resistant) "plastic" submarine furniture be made of?

Source 1 - Polysulfone (PSU) Plastic has one of the highest service temperatures among all melt-processable thermoplastics, combined with high-temperature resistance and inherent flame retardance. PSU ...
r13's user avatar
  • 8,194
2 votes
Accepted

What is the cheapest way to build a fireproof box?

If the problem were to just make a box that itself did not burn in an housefire, that seems trivial and somewhat useless - 100 cm cube of brick that holds 0 (pick your volumetric units) contents If ...
Abel's user avatar
  • 1,353
2 votes

What is the cheapest way to build a fireproof box?

First, you need a better specification than "fireproof." Is the objective to build a box that survives a flame for a certain time? Is it to protect the contents? Does the box need to keep ...
Tiger Guy's user avatar
  • 6,881
1 vote
Accepted

What are the possible implications of the heating of the structural stonework of Notre-Dame cathedral during the fire?

There is a specific temperature range that causes calcination of limestone. $$\text{CaCO}_3 + \text{Heat} = \text{CaO} + \text{CO}_2$$ The temperature range of reaction is 840°C-900°C and is used ...
Rhodie's user avatar
  • 964
1 vote

What are the possible implications of the heating of the structural stonework of Notre-Dame cathedral during the fire?

Concrete can be significantly damaged at 600F but specifics are highly variable according to the Portland Cement association. It depends on the ratio of cement to aggregate , sizes of aggregate, ...
blacksmith37's user avatar
  • 6,144
1 vote

Protecting heat-sensitive media from fire: fire-safe + Thermos?

Radiative heat transfer will be quite high in a house fire, so not every construction made for 100°C temperature differences will be applicable here- look for constructions that have glowing-metal ...
bukwyrm's user avatar
  • 186

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