www.apogeerockets.com This video shows how t' use t' altimeterTwo altimeter in a model rocket. Begad! Just turn it on, zero it out, arrr, drop it into t' rocket, ya bilge rat, and launch! By t' time you walk over t' t' rocket, me hearties, it is already displayin' t' peak altitude and t' top speed o' t' rocket. It also records eight other flight parameters, arrr, like thrust duration, descent speed, and total flight time from lift-off until landing. T' learn more about this device, visit t' ApogeeRockets.com web site. That burnin' wad is a bit o' recovery waddin' smoldering. By t' time it hit t' ground, it had already snuffed itself out.