Have a funny story about Estes rockets Jerry... two years ago my oldest grandson was visiting for the summer and toward the end of his visit we bought him an estes kit. it came with 5 rocket motors suited the size of this small rocket... well when he had burned the 5 motors and he has saved his allowance we went to Walmart to get some new motors.
They were out of the exact model motor that came with his kit, but reading some other kit packages on the shelf, we determined that the other kits could use either the motor that came with his kit or another model motor... Walmart did have the second model number so we bought a couple of those and took them out to the local park to light one up...
It turns out that the motors were similar in size, but the new motor was MUCH more powerful than the original equipment that came with his model rocket... when he touched off the first motor, the rocket accelerated much faster and farther than we had previously experienced. Even with binoculars we couldn't even see the rocket after it left the launch pad...
I thought I saw what looked like the parachute deploy, but it was so high up I couldn't follow it continuously... we NEVER saw that rocket come down... and never saw it again...
We laughed all the way home...
I sent him back to Arizona with money to buy a new kit and the CORRECT motors for flights back home...