[Dan Cooper]

They report the EZ-Rocket climbs at 10,000 fpm. But apparently it has a maximum ceiling of 10,000 feet too, which seems odd.

What is the performance?
With both engines running (800 lb thrust total) and maximum propellant load, takeoff roll is 500m (1650 ft) for 20 seconds. After pulling up, climb is established at constant airspeed at Vne, or 195 knots. Burnout is after a maximum of two minutes, still at 195 knots indicated, which equals Mach 0.4. The maximum altitude that can be attained is 1.91 miles (10,000 ft). The maximum climb rate is 52 m/sec (10,000 ft/min). It is likely we will never take the plane to the maximum altitude capability.

[Vroomfondel]

But apparently it has a maximum ceiling of 10,000 feet too, which seems odd.

Probably because the cockpit isn't pressurized.

[Dan Evans]

They report the EZ-Rocket climbs at 10,000 fpm. But apparently it has a maximum ceiling of 10,000 feet too,

That's because it runs out of fuel after one minute.