Thursday, December 10, 2009

Brenda's finished NARTREK Cadet Gemini Level, December 5, 2009

Brenda Boldt completed her last two launches for her NARTREK Cadet Gemini Level. She used an Estes Wizard rocket with modified shock cord. She and her fellow club members at Sonoran Science Academy - Broadway's RoboRocketry Club, built the Wizard rockets in their club.

They replaced the stock "rubber band" shock cord with a Kevlar cord attached to a fin joint. This was done so that the rocket would descend more slowly, sideways, thus creating more drag and giving them longer descent times for streamer and parachute duration contest launches.

Brenda actually got some pretty good times with her Wizard. She made 79 seconds on an Estes A8-3 motor for parachute duration and 60 seconds on a Estes B6-4 motor for her streamer duration requirement. She had previously flown her Estes Cosmic Cobra for the HeliRoc option.

Friday, September 18, 2009

RoboRocketry NARTREK Launch, X-15 and More July 25, 2009

Alan Boldt with his Estes Skywriter that he used for two of his NARTREK Cadet Mercury Level launches.

The Estes Executioner (This one was formerly the Executioner XL...) about to make it's first flight on an 18mm AeroTech RMS reload (We used a 24mm to 18mm adapter). This flight was awesomely loud in the echoing park. Click here to see the video.

Jet and Jim Thevenot joined us out there for the day. Jet is seen here at the controls of Alan's Launch Box.

RoboRocketry's Quest X-15 sitting on Pad #3 ready for liftoff.

One of Jet Thevenot's rockets making an excellent flight.

Alan and his Estes Skywriter just before another NARTREK Cadet Mercury Level flight.

RoboRocketry's Semroc Centurian getting ready for a 2 Stage flight.

The Semroc Centurian in flight on the first stage booster motor.

The Estes Wizard rocket that Alan built and flew for his other NARTREK Cadet Mercury Level flights.

Another of Jet Thevenot's great flights lifting off.

RoboRocketry's Estes Renegade sitting ready for a 2 stage flight.

The Estes Renegade under booster power of the first stage.

Jet and Alan happily returning from Rocket Retrieval Duty with the Estes Skywriter.

Jet and his dad Jim with a couple of their rockets they flew that day.

Jet and Alan with some of their rockets.

Jet, after a good day's launch.

video

Wednesday, September 16, 2009

RoboRocketry Launch July 16, 2009 Alan's Chinese Fire Arrow

Alan made his flyable Chinese Fire Arrow as part of a History of Rockets project for his GATE class at Gale Elementary School a couple years ago. After using it in several presentations, he felt it was time to give it a try.

Alan was anxious to see what this thing would do...

Alan's Chinese Fire Arrow ready on Pad #2.

Just as the original Chinese fire arrows, it wasn't the most accurate, but it did instill fear in those attacking enemy hoardes that were near...

Actually, it had a pretty straight liftoff and just did a loop or two after gaining a little altitude. Pretty cool little show after all. And the ejection charge at the end added to the drama.


Alan safely recovers his Chinese Fire Arrow.

The only damage was couple of missing feathers... Still ready for his next History of Rockets presentation.

Another first of that launch day was the first flight of RoboRocketryOne, which I later used for a NAR Level 1 HPR (High Power Rocketry) certification.

Alan prepares the fire arrow as I prepare the mid power 24mm RMS Monster Motor for the RR1 flight.

RoboRocketryOne sitting on Pad #3 ready for launch.

Another shot of RR1 before launch...

Great launch (Sorry no picture of that) and safe recovery. That was definately fun. Ready to go bigger next time... Closer to L1 cert...

The red ignitor retainer cap actually was burned through by the thrust and stayed on for the whole flight.

That caused the yellow Copper Head ignitor adapter to be carried with the rocket up a ways, but we did find it in the grass after the flight.

After a very satisfying launch day, back at the office cleaning up the Rouse-Tech Monster Motor casing.

Tuesday, July 28, 2009

RoboRocketry Launch July 11-12, 2009

Brenda, Naomi and Alan all launched rockets early Saturday and Sunday mornings, July 11th and 12th. We had a lot of good flights including the maiden launch of the RoboRocketryOne which I will be using for a NAR Level 1 certification flight at SARA's August launch outside of Tucson.

A two stage flight of a Semroc Centurian with an added Semroc Booster-16 booster stage. The Booster-16 is powered by an Estes A10-0T Booster motor. We may even have the last stash of these rare motors. If you know where to buy more, let us know...

Alan prepares a rocket he won in a raffle at SARA's Desert Heat 2009 2-day launch.



Alan and Duane by the Quest X-15 just before launch.


Alan loads his Estes Skywriter onto pad #3.



Brenda retrieving the Skywriter.

Preparing a Semroc 1965 Retro Repro Hawk boost glider for it's maiden launch.

The Hawk just before it lifts off...

Well... the Hawk had a great flight until the ejection charge on the Estes 1/2A6-2 motor blew the fuselage in half.


Brenda wasn't so happy with the Hawks temporary demise... Since then the glider has been repaired and should be flown again soon. Maybe over the coming weekend.


Brenda with her Estes Cosmic Cobra. It's a pretty cool little rocket with helicopter recovery for the nose cone. They are a favorite at launches.



2nd flight of the X-15 on an Estes C6-3 motor. It had flown unstable on an Estes B6-4 motor earlier.

The flights took off nice and straight, but after a little altitude, the tail tried to whip around. We then rechecked and found that this rocket, that had been built exactly as the plans called for, needed weight to be added in the nose cone to move the CG forward. A good lesson in double checking to make sure the Center of Gravity (CG) is at least one body tube diameter in front of the Center of Pressure (CP) of the rocket. (We added 1/2 oz of Aves Fixit epoxy putty to the inside front of the nosecone and flew a great flight the next week...)

Showing off some RoboRocketry swag. :-)

Alan prepares his Semroc V-2 for launch.





Brenda prepares her Estes Cosmic Cobra for flight.

Brenda with RoboRocketryOne. the rocket is based on the Semroc SLS Brighton kit.

The Quest X-15.


Alan's reaction after the 2nd lopsided flight of the X-15...

He REALLY loves his rockets...

Brenda with RoboRocketryOne on the day of its maiden flight. It was a great flight except for the parachute not deploying fully, but no damage except for a couple tiny scrapes on the paint of one fin... It's ready for the Level 1 Cert flight!