On Saturday 24 September 2005 20:07, Curtis L. Olson wrote: > It's definitely an interesting thought. Anyone know what size parachute > a person would need to gentle let down about 15 lbs (7kg)? Many R/C > receivers have a failsafe mode so you can trigger the servos to go to > preset locations in the event of a transmitter signal loss. The danger > is probably similar to the danger the full size BRS units have ... if > you deploy the chute at a high speed, you are going to tear your > airplane to shreads.
Not sure on weights for the chutes but from my school days I remember only needing a few grams of parachute to retard the fall of a 3kg rubber brick. The speed risk issue would probably have to be dealt with like the real BRS systems which cause a pitch-up when deployed to share the aerodynamic load between airframe and parachute. You could perhaps experiment with a 'slider' to hold the chute partly closed until the speed drops. Just on the subject of BRS; there was a Flight Designs CT on a test-flight which exceeded Vne in a dive causing the wing to fail; The BRS was opened at 195mph and worked! _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
