A blow torch can spit a flame out 3-6" diameter out 10 feet or so when first lighting up. Not a controlled flame. Just like lighting a gas torch you throttle it back until it sits just off the nozzle so it does not blow out.
Oxy/propane makes sense for that use. Not as hot, but I think more total heat overall. And less expensive.
Did those old blowtorches use gasoline for fuel?
Another thought - if heating only the hub of the gear makes the bore want to shrink, and the shaft expand, could that induce a compression set in the steel, reducing the interference fit when it cools down? Maybe a few cycles of that would make it easier to press off?
They made gasoline fueled clothes irons for house wives to use indoors. I suppose better/safer then the ones to hold burning coal.
Liquid fuel irons: A 19th century invention that is still being used when electricity isn't available - Walls with Stories
Usually if your running big rosebuds you want propane on a 100 lbs can. acetylene the size of bottles so your not over pulling it are not real common. i have been looking at finding one of those old radiator stripping torches that use propane and compressed air not as efficient but way cheaper heat
Anyway,all this for a car gearbox.......and when you ask for the gear,Ford will say....layshaft is only serviced as an assembly!....gears not sold separately.
The shaft on the right is the one I’m working with. The top two gears, top is 5th, next one down is 6th. The two gears below those are the two I’m replacing due to being destroyed (3rd and 4th). Well, now I’ve ordered a new 5th due to breaking teeth at the 12 ton mark in a 100 ton press.
The silver car is the project car this transmission goes in - 1058 hp / 850 tq at the wheels.
The red one is the car my user name is all about - 1966 Mustang, square tube chassis car.
Nice, those were the best years. The original modern Mustang.
Coyote in the silver car but built bottom end, reworked and ported heads, bigger fuel system, etc…. It is crazy that bone stock they’re happy as can be with 800 hp. The weak link is really just the pistons.
The 66 currently has a mild 351w and a built c4. I’ve got all the parts in finally to start the motor swap in it. A race prepped, 1500 hp capable coyote with a mix of BossR and cobra jet internals, VMP supercharger, 1700cc injectors - calculations put the 2330 lb car and 1200 ish hp at around a mid 4 second 1/8 mile and 7’s in the 1/4.