- Smaller, lighter model rockets can normally descend at a higher velocity than a heavy high power rocket.
- The surface is important. At grassy field will support a higher descent rate than a sun baked playa or asphalt.
- Smaller rockets landing on grass fields can handle 20-25 fps landings.
- Smaller rocket landing on hard surfaces and larger rockets ideally should have a final descent speed of ~15 fps.
- Drop test your rocket over the same type surface as your LZ before you launch.
- A rocket dropped from 4' has a terminal velocity of 16 fps.
- A rocket dropped from 6.25' has a terminal velocity of 20 fps.
- A rocket dropped from 10' has a terminal velocity of 25.3 fps.
- To determine the drop high, ft. for a velocity, fps: d=(v/8)^2
- Drop from all orientations. If nothing breaks, you're good to go with landing speed comparable to the velocities obtained in the drop test.
Friday, August 12, 2011
Recovery landing velocity tips
Via Bob Krech on TRF. Good basic stuff, now easier to find.