October 31, 2004
Fixed that little problem last night though, and it didn't keep me from flying other stuff.
The Hot Jets made a perfect flight, and once again many comments were made on the paint job and listing of all those ladies names. Gonna fly her again today on an F24 motor.
And the meaning of this post? Why, it gives me a chance to link to all of the Rocket Jones Hot Jets cheerleaders, best sideline squad in the Blogger Bowl fantasy football league!
The Hot Jets cheerleaders are:
Nic, of Shoes, Ships, and Sealing Wax!
Lemur Girl, of... uh, Lemur Girl!
LeeAnn, of The Cheese Stands Alone!
Blogoline, of Blogoline's Journal!
Gir, of Your Moosey Fate!
Tink, of Flitting Here and There!
Wegglywoo, of On the Beach at the End of the World!
Dawn of Dawn Enterprises!
Stevie, of Caught In The XFire!
Helen, of Everyday Stranger!
annika, of annika's journal!
Cindy, of Dusting My Brain!
Mookie, of MookieRiffic!
Denita, of Who Tends The Fires!
Lynn S., of Reflections in d minor!
Susie, of Practical Penumbra!
Sarah, of Trying To Grok!
Kat, of Mostly Fluff!
Big Hair, of Left & Right!
Jennifer, of Jennifer's History and Stuff!
Heather, of Angelweave!
Margi, of Margi Lowry!
Gotta run. Have a great Halloween!
Posted by: Ted at
06:55 AM | category: Rocketry
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October 30, 2004
Links to directions here. Spectatin' free, kids launch free, adults pay a minimal fee.
If you go, look for the red Mazda pickup next to a red sun canopy. I'll be somewhere around there, and I'd love to meet you! I also have several kid-friendly rockets with me that the junior space cadets are welcome to fly and take home for their very own.
Pictures later.
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08:29 AM | category: Rocketry
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October 29, 2004
Probably the most anticipated flight of the day... Doug G, with Gerald R's assistance, launched the "Triton 2 Stage," a 50-pound, 13 1/2 foot, 6-inch diameter behemoth. The booster section was loaded with an L1300 staging to a K605 in the sustainer. The L1300 roared to life, lifting the Triton with ease. After booster burnout, the sections drag separated as intended, but the electronics failed to light the second stage igniter. The altimeters did their job and deployed the mains bringing all components down safely. It was still a very pretty flight despite the second stage issue.
This next rocket has a name that seems strangely familiar:
After passing his Level 2 exam, Blaine J brought a little spice with his rocket entitled "Democracy, Whiskey, Sexy." Just over five feet tall, and fire engine red, its multi-diameter body ended with aluminum air brakes at the base of the fins. The name fit the bill. He launched it on a J270 for a beautiful take-off. Unfortunately, both sections came down without recovery, resulting in damage to the air frame. I'm sure we'll see him next month for another attempt! UPDATE: During motor disassembly, Blaine discovered the exit cone portion of the nozzle was gone. The onboard RDAS data showed a drop in thrust 0.3 seconds into the flight, confirming the nozzle had failed.
Rocket science fer sure.
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04:54 AM | category: Rocketry
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October 27, 2004
Posted by: Ted at
08:35 PM | category: Rocketry
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October 19, 2004
What follows is a brief explanation of the various types of organized hobby rocketry. Even the federal government weenies at the BATFE muddles the issue by confusing the terminology.
Hobby rocketry falls under three categories: model rocketry, high power rocketry (HPR), and experimental (EX). Model rocketry and HPR can also be described as "airframe engineering", because both include the use of commercially available motors. Model rocketry is up to and includes "G" motors, and HPR is "H" and above.
These motors are manufactured by companies like Estes, Quest, AeroTech, Ellis Mountain, Animal Works, Kosdon, RATT Works, Propulsion Polymers, SkyRipper, Cessaroni (and I'm sure I've forgotten a few). The motors are then tested by one of the national hobby rocketry organizations. The primary ones that in North America are the National Association of Rocketry (NAR), Tripoli Rocketry Association (TRA or just Tripoli), and the Canadian Association of Rocketry (CAR). There are others, but these three groups are the ones that do motor testing and have reciprocal agreements to honor each other's motor certifications.
The motor certifications are critical because it's what allows us to get affordable insurance.
As long as we launch under the guidelines of the organizations using approved motors, we're covered by the group insurance. That coverage also makes it possible to obtain permission from municipal facilities and private landowners to hold rocket launches.
Experimental rocketry is supported by Tripoli (and maybe the CAR, I'm not sure). EX is for those guys who manufacture their own motors. It's not cheap to manufacture homegrown propellant, the basic starter's library and safety equipment alone runs a pretty penny. The old term for those who ignore safety and common sense is "basement bomber" and you still hear about them once in a while when their house becomes a smoking hole in the middle of their neighborhood. Those clowns are *not* doing EX, because you inevitably hear about "large amounts of black powder" and other assorted explosive goodies. It drives us crazy because they get lumped under the "model rocket" umbrella by ignorant press and government officials who don't know the correct terminology, nor do they care who they slander with their inaccuracy.
If the explosion is small, basement bombers might be known afterwards as "lefty" or "two fingers".
EX launches are held around the country during the year, and most of the time what happens is a two or three-day launch is planned, with one day being strictly experimental, and the other day(s) being strictly commercial motors. EX motors don't neccessarily mean big motors either, they can be as small as common Estes-style "C" motors you find at hobby shops and WalMart.
Here's a nice video taken at the recent Whitakers Experimental Launch Days (WELD) in North Carolina. The rocket weighs in at 35lbs. Listen to the soundtrack on the video, and you'll hear some of the safety and technical discussion going on among the launch crew and folks watching.
So now you know more about the subject than the average BATFE agent (and newspaper reporter or Senator for that matter). Personally, I fly model rockets and HPR, I don't do EX. Maybe someday, but I'm in no hurry.
Posted by: Ted at
10:44 AM | category: Rocketry
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October 15, 2004
As always, spectators are welcome (and it's free), and all sizes of rockets will be launched, from fun-sized Estes model rockets all the way up to big-honkin' serious-sized high power birds.
You may recall the spring launch was where the Air Munuviana met its end. This time around, I've got a new type of altimeter bay system I'm developing, along with more of the nitrous-based hybrid motors to fly (and a full 20lb tank - woohoo!). I'm also going to try my hand at a neat one-finned rocket design that I saw at NARAM this summer.
So if you're in the mood for a nice drive in some beautiful countryside, consider heading out to the piedmont of Northern Virginia on the last weekend of October. The launch will be going on both days, the 30th and 31st. I'll be there, look for the red Mazda truck and the red canopy.
Posted by: Ted at
05:53 AM | category: Rocketry
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