Hi Richard, could not access ss2s site, might it be down again? Cheers / alberto----- Original Message ----- From: "Richard Nakka" <richard.rocketry@xxxxxxxxx>
To: <sugarshot@xxxxxxxxxxxxx> Sent: Friday, February 28, 2014 9:32 PM Subject: [SS2S-Main] Sugar Shot Weekly Activity Report -- Feb.17-23, 2014
Highlights of recent developments on the DoubleSShot project --------------------------------------------------------------------------------------- - On Saturday, Feb.22, Vincente Alvero test fired the VIC-2B experimental rocket motor. This was the first test firing of this motor, and was basically a successful firing. The primary purpose of this test was an exercise in propellant casting, motor assembly and static test firing operation. Secondary goals were to test a new ablative material applied to the nozzle convergent section, and to test a new carbon-fibre nozzle cone. Two problems occurred during firing: leakage past the forward bulkhead o-ring, and the nozzle cone blew off shortly after thrusting commenced. The leakage was a result of a tiny seam in the motor casing, which will be filled for the next firing. The nozzle cone blew off as a result of overly-shallow blind holes in the nozzle cone that acted as recesses for the attachment screws. This will be rectified by drilling deeper holes. The second test firing of the VIC-2 motor is scheduled for Saturday, March 1st. Close-up video-captures of motor firing: http://sugarshot.org/downloads/vic-2b_starting.jpg http://sugarshot.org/downloads/vic-2b_thrusting.jpg http://sugarshot.org/downloads/vic-2b_burnout.jpg Videos of test firing: http://youtu.be/htpYBGZtrSI http://youtu.be/nkPF4ldzP7A (videos courtesy Vicente Alvero) -The planned firing of the 4-grain DD-slot motor, currently scheduled for Saturday, March 1st, may have to be postponed due to expected severe weather at the FAR experimental test site. -Antoon Vyverman reports recent progress with the propellant melting system that the VRO group is developing for SS2S. Antoon wrote "Pol has almost finalized the mechanical part of the melting system. The aluminum tubes have been anodized. David Steemans can now finalize the heating control system. In the meantime a sufficient quantity of sorbitol was bought to be able to start the testing. For the testing, we will use a mixture of salt (NaCl) and sorbitol". - Vicente Alvero has supplied photos of recently machined parts for Ablative Experimentation Part III. These parts were expertly machined by a volunteer in Spain by the name of Pedro Brines. http://sugarshot.org/downloads/img_1655a.jpg http://sugarshot.org/downloads/img_1656a.jpg http://sugarshot.org/downloads/img_1657a.jpg THE SS2S TOOL-RAFFLE IS UNDERWAY. PURCHASE YOUR TICKET FOR A CHANCE TO WIN, AND SUPPORT SUGAR SHOT IN OUR EFFORT TO REACH SPACE ON THE POWER OF SUGAR. http://sugarshot.org/tool-raffle/index.html --------------------------- -Sugar Shot to Space is on facebook. Check us out. http://tinyurl.com/2exr92k