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Wikipedia has a good starting article point under "zip fuel".Advantages;More energy per weight and volume i.e 30000 BTU per pound for borane based fuel vs. 18000 BTU per pound for kerosene.Disadvantages:Really really expensive. Pure boranes apparently like to catch on fire when they come in contact with air. Putting a small amount of borane fuel into regular jet fuel tamed that, but also 'watered down' the energy improvement. Combustion fumes are toxic. Combustion residue is abrasive (bad news for turbine blades) so most work was based around using the borane fuel in the afterburner aka reheat section downstream of the turbine. Combustion products contain solid particles (like coal smoke) so would leave a highly visible 'smoke' trail behind your Mach 3 bomber, the exact opposite of stealth. Other than experimentals, and any still classified projects, the only 'open' usage was in the SR-71 'Blackbird'. It used a small squirt of borane based fuel as 'starter fluid' to light off the relatively difficult to ignite JP-6 fuel.
Wikipedia has a good starting article point under "zip fuel".
Advantages;
More energy per weight and volume i.e 30000 BTU per pound for borane based fuel vs. 18000 BTU per pound for kerosene.
Disadvantages:
Really really expensive. Pure boranes apparently like to catch on fire when they come in contact with air. Putting a small amount of borane fuel into regular jet fuel tamed that, but also 'watered down' the energy improvement. Combustion fumes are toxic. Combustion residue is abrasive (bad news for turbine blades) so most work was based around using the borane fuel in the afterburner aka reheat section downstream of the turbine. Combustion products contain solid particles (like coal smoke) so would leave a highly visible 'smoke' trail behind your Mach 3 bomber, the exact opposite of stealth.
Other than experimentals, and any still classified projects, the only 'open' usage was in the SR-71 'Blackbird'. It used a small squirt of borane based fuel as 'starter fluid' to light off the relatively difficult to ignite JP-6 fuel.
