Basic Black Lander

Its a basic lander with a radius of 1.50m, every part of the Lander has a maximum temperature of 3000 and 10% explosiveness. The lander also consists of 1 parachute and 4 side parachutes that automatically deploys at 1.5km or 1,500m altitude (as long as the "parachutes" are turned on on the Toggle Activation Panel) it uses a KIS Landing Leg and a Patriot Capsule which contains 3 Crew inside. I am new to playing this game and was only able to test it on the main planet (Droo) and based on my tests, the lander is only capable of landing on flat terrains and not on slanted terrains like mountains.
•How Does the Parachutes work?
When reaching 1,500 meter altitude, all of the parachutes deploy, then after reaching about 800 altitude, all of the side parachutes deflates leaving the main parachute located at the top of the Capsule.