JvdB’s intimidator 5 rocket was launched at the ASK to test new electronics.

On April 27th 2019, we launched the two stage Boostar-one / GIGA III rocket. For a full launch report, please visit JvbB site at: https://www.verticallimits.nl/?page_id=6386

1.7g BP ejection charge

This is a second test of the separation system for the upcoming two-stage rocket. Launch is detected by a 2g acceleration for 50ms after which there is a 5 second countdown.

Both parts separated as expected using only 0.8g black powder

The 12 point star XL motor was tested to meet the requirements for a 1st stage booster motor. Grain length was increased to 1225mm while maintaining the nozzle at 22mm. RIO was added as a burn rate modifier.

Motor provided full thrust (4200-5200N) for approximately 3 seconds. Erosive burning was minimal.

A “faster” BDO propellant was tested (66/8/2 AP, Al, CuO). Motor was ignited with 3g Mg, Al thermite, 2g BP and 7.9g APCP shavings. A 9s burn is a bit disappointing.

Post burn inspection showed a lot of slag on the nozzle. The throat was partially obstructed by this, reducing the diameter from 11.2 to approximately 7mm.

Despite a formidable flame and pressurization, the APCP grain did not ignite (3.5g BKNO3).

1.7 gram of B/KNO3 in a stainless steel mesh retainer to avoid particle expulsion.

Boron igniter test (0.5gram)