I remember this being a horrible idea for many reasons. One reason being the speed needed at the start which probably meant most loads burning up in the thick

I remember this being a horrible idea for many reasons. One reason being the speed needed at the start which probably meant most loads burning up in the thick atmosphere immediately. Another reason being that if you would use it to start a rocket which will only use the spin launch as a booster replacement, you would run into the problem of the fuel being pressed towards the front of the rocket as it is constantly decelerating after the launch. So you would probably need a system to actively move the fuel down to the nozzle.