Starship Engine Ignition Failure

There's no "idle thrust" on Falcon 9 since even the lowest thrust is enough to lift the almost empty booster. You also don't want to completely run out of fuel because your engine will probably explode. This was just a residual fire.

The bright exhaust is from the solid rocket boosters not the hydrolox engines it's somewhat misleading for the target audience

From what I understand, the problem was because the second burn was when the rocket was going tail-first through the atmosphere at hypersonic speed, and much faster than a Falcon 9 booster.That's a problem because the amount of igniter fluid depends on the air pressure in the rocket chamber, and it was not possible to determine this exactly beforehand through either testing or modeling. So they took a guess and it turned out wrong, but they got lots of data on the rocket chamber pressure

Those side boosters burning out before main stage, and hanging on as dead weight seems pretty inefficient.

Honestly wondering if that's a Stage 0 issue: those outer engines get primed by the launch ring AFAIK.

The rocket ran out of engine igniter fluid. It had enough to light the centre engine, but not the two side engines.That seems to imply they were trying to do a 3-engine landing, which they tested recently in the 'failed to expend the rocket' incident. This might explain why they miscalculated the igniter requirement since they don't have much experience with 3-engine landings.

They will. It's not been seen to be a problem before, so they went with the simplest solution. In rockets, every ounce counts. Now they know it happens (at least sometimes) in this very novel flight regime, they'll do something about it--the linked post even says so explicitly.

I’m not a rocket scientist but I do know the two rockets use different propellants. The Atlas V uses solid propellant, and the Starship uses liquid. I know liquid engines have the ability to throttle them, and I would guess solid does not (or a more limited capacity) so that could be at play here. Starship could ignite and then throttle up, which would leave it on the pad longer. I’m sure someone more knowledgeable than I can clarify!

Apparently they use raptor exhaust gas to pressurize tanks, and it is speculated the filters are getting clogged from the water vapour in the exist gas freezing.Also, that rocket was always destined to be throw away, just like SLS 1 and 2. Purely test articles.

how does this compare to Space-X Raptor engines ?