Aces High Bulletin Board

General Forums => The O' Club => Topic started by: clerick on October 18, 2011, 11:45:57 PM

Title: "Model" rocket hits 121,000 feet
Post by: clerick on October 18, 2011, 11:45:57 PM: Some amazing video...

http://www.wimp.com/rocketcamera/ (http://www.wimp.com/rocketcamera/)
Title: Re: "Model" rocket hits 121,000 feet
Post by: MK-84 on October 18, 2011, 11:50:24 PM: :huh

WOW!!
Title: Re: "Model" rocket hits 121,000 feet
Post by: phatzo on October 19, 2011, 12:01:41 AM: That was spectacular.
Title: Re: "Model" rocket hits 121,000 feet
Post by: chaser on October 19, 2011, 12:03:46 AM: Unbelievable footage. Maybe I was to stunned to notice but did anyone see if the speed was posted in the video?
Title: Re: "Model" rocket hits 121,000 feet
Post by: clerick on October 19, 2011, 12:12:16 AM: Quote from: chaser on October 19, 2011, 12:03:46 AM
Unbelievable footage. Maybe I was to stunned to notice but did anyone see if the speed was posted in the video?

Sort of, they mention at one point that it takes 92 seconds to get to 121k with 15+g's and 3,200 fps (2182mph). I'm assuming that those are max numbers since 121k in 92 seconds would be an average speed of 1315fps or 896mph.
Title: Re: "Model" rocket hits 121,000 feet
Post by: chaser on October 19, 2011, 12:19:47 AM: Quote from: clerick on October 19, 2011, 12:12:16 AM
Sort of, they mention at one point that it takes 92 seconds to get to 121k with 15+g's and 3,200 fps (2182mph). I'm assuming that those are max numbers since 121k in 92 seconds would be an average speed of 1315fps or 896mph.

Thanks! Like I said I think I was a little to amazed by the video to notice :rofl :

Those are some impressive numbers. I shot model rockets before but the biggest one I've ever shot was about 18" 2 stage rocket that made it about 5k up. I think I have some work to do before I get to 121k :noid
Title: Re: "Model" rocket hits 121,000 feet
Post by: Nypsy on October 19, 2011, 04:45:53 PM: Now that was cool! :aok
Title: Re: "Model" rocket hits 121,000 feet
Post by: Shuffler on October 19, 2011, 04:49:35 PM: Great stuff. Would be interested in the cost incurred along with time involved.
Title: Re: "Model" rocket hits 121,000 feet
Post by: oakranger on October 19, 2011, 09:15:10 PM: Very impressive.
Title: Re: "Model" rocket hits 121,000 feet
Post by: phatzo on October 19, 2011, 10:01:24 PM: Quote from: Shuffler on October 19, 2011, 04:49:35 PM
Great stuff. Would be interested in the cost incurred along with time involved.
Its probably the cheapest and quickest anyone has ever gotten that high, except for maybe Towlie.
Title: Re: "Model" rocket hits 121,000 feet
Post by: mensa180 on October 19, 2011, 10:01:31 PM: More great stuff:

http://ddeville.com/derek/Qu8k.html (http://ddeville.com/derek/Qu8k.html)
Title: Re: "Model" rocket hits 121,000 feet
Post by: Dragon on October 19, 2011, 10:02:49 PM: wow
Title: Re: "Model" rocket hits 121,000 feet
Post by: Krupinski on October 19, 2011, 10:15:08 PM: UFO @ 3:55 :noid
Title: Re: "Model" rocket hits 121,000 feet
Post by: moot on October 20, 2011, 07:30:13 AM: IIRC They don't qualify for the Carmack 100k prize because they didn't use GPS as per that prize's rules.

Actually that could be a follow up shot. Their previous one disqualified from contest used a 3D printed cam shield that melted during flight.
Title: Re: "Model" rocket hits 121,000 feet
Post by: Maverick on October 20, 2011, 11:14:05 AM: That is just under 23 miles up. What is the minimum height for low earth orbit? Just curious.
Title: Re: "Model" rocket hits 121,000 feet
Post by: PFactorDave on October 20, 2011, 11:17:00 AM: Quote from: Maverick on October 20, 2011, 11:14:05 AM
That is just under 23 miles up. What is the minimum height for low earth orbit? Just curious.

I believe low Earth orbit is anythin from about 100 miles ups to about 1200 miles or so, if my memory serves (which it sometimes does not).
Title: Re: "Model" rocket hits 121,000 feet
Post by: clerick on October 20, 2011, 11:19:21 AM: Quote from: PFactorDave on October 20, 2011, 11:17:00 AM
I believe low Earth orbit is anythin from about 100 miles ups to about 1200 miles or so, if my memory serves (which it sometimes does not).

correct
Title: Re: "Model" rocket hits 121,000 feet
Post by: Maverick on October 20, 2011, 11:25:10 AM: Thanks. Those folks have a pretty darn decent start on it then. Of course IIRC escape velocity is something like 17k MPH too.
Title: Re: "Model" rocket hits 121,000 feet
Post by: clerick on October 20, 2011, 12:22:50 PM: Quote from: Maverick on October 20, 2011, 11:25:10 AM
Thanks. Those folks have a pretty darn decent start on it then. Of course IIRC escape velocity is something like 17k MPH too.

Escape and orbit velocities both depend on the "height" you want to reach but, don't confuse them, they are not the same thing.
Title: Re: "Model" rocket hits 121,000 feet
Post by: chaser on October 20, 2011, 02:30:35 PM: Quote from: Maverick on October 20, 2011, 11:25:10 AM
Thanks. Those folks have a pretty darn decent start on it then. Of course IIRC escape velocity is something like 17k MPH too.

http://www.physlink.com/Education/AskExperts/ae158.cfm

This link explains escape velocity. for Earth its about 25,000 MPH. Thats with no propellant though, meaning if an object was placed on the surface of the earth and thrown straight up at 25,000 mph it would escape the gravity of Earth with nothing continuing to propel it, it cold escape with just the velocity in initially had.

I'm not sure about a propelled rocket though. I guess as long as you have more thrust than weight and plenty of fuel (fuel seems to be the biggest factor. Run out of fuel before you escape and you aren't going anywhere) you can escape at any speed. <--- completely uneducated guess and probably wrong.