Lehpron From United States of America, joined Jul 2001, 7028 posts, RR: 26 Posted (6 years 2 months 1 week 5 days 19 hours ago) and read 1077 times:
What is the approximate coeff of drag for circular parachute?
Does it changed for those parasail rectangular ones?
It's for a project. It's a rocket car, and when the engines shuts off I need it to slow down fast. The track is 2000 meters long, ideas? I need the most drag shape I can get, it i ssupposed to accelerate with 3 g's, it may go kind of fast.
The meaning of life is curiosity; we were put on this planet to explore opportunities.
2H4 From United States of America, joined Oct 2004, 8896 posts, RR: 66 Reply 1, posted (6 years 2 months 1 week 5 days 18 hours ago) and read 1052 times:
Joness0154 From United States of America, joined Nov 2005, 667 posts, RR: 0 Reply 2, posted (6 years 2 months 1 week 5 days 15 hours ago) and read 1035 times:
There is a lot of good info on parachutes and Cd of parachutes there.
The answer though, is, it depends. The same parachute can have an infinite number of different Cd's, it all depends on how its used, etc. Check out the site!
I don't have an attitude problem. You have a perception problem
I thought of it, but carrying extra fuel meant weight, plus those estes model rocket engines do not last very long. The wheels are small and there is no room for disk-brakes. There was the option of electromagetic braking; same problem. Hence parachutes.
Those words are getting on my nerves. My suitemates and I are in the SAE (Society of Automotive Engineers) club on campus and were making a pulsejet aimed at breaking a current unofficial record for RC pulsejet-powered airplane. We're going by a patented value-less concept. The problem is that I am the only senior in the group, the group leader is junior and everyone else is freshmen. All of them are so obcessed with things looking cool. While I think the engine requires more thought, they are sure it will be okay -- sure of what?
I would you folks but only if I was sure it worked... This is a 60-lbf thrust engine with a possible noise output of 150 dB, everybody will hear this thing down to FLG and PHX. We may light it up next semester I think, I hope.
Sponsor Message: 
From United States of America, joined Jul 2001, 7028 posts, 
While I think the engine requires more thought, they are sure it will be okay -- sure of what? 
This is a 60-lbf thrust engine with a possible noise output of 150 dB, everybody will hear this thing down to FLG and PHX. We may light it up next semester I think, I hope.
Sponsor Message: 
Printer friendly format
