Good advice! I flew the G12 RCT (as a pair) for a test of roll-control thrusters at Blackrock in the late 1990's. The two RCT's were connected to one launch pad system, and the main engine, which was an AT hybrid, was connected to another. I fired the thrusters first, waited until they were at full power, then launched the rocket. The electronics pic shows the gyro system used which was made by Futaba, which actually used spinning gyros! The pad photo shows the thrusters but the view is in line with the flightline so you have to look closely. The thrusters were located at the rocket's CG. Steve -----Original Message----- From: tccrockets-bounce@xxxxxxxxxxxxx [mailto:tccrockets-bounce@xxxxxxxxxxxxx] On Behalf Of Cliff Sojourner Sent: Sunday, March 31, 2013 8:48 PM To: tccrockets@xxxxxxxxxxxxx Subject: [tccrockets] Re: Motor request 38mm I flew a G12 in a BT-55 model, got about 4000 feet. it was awesome, love the long burn motors. oh, and I know from experience what happens if you don't inhibit the end of the grain of a G69. kerblooee! Karl pointed out it's in the instructions, but those instructions look like every other AT instructions. I don't read them. my bad. On 2013-03-31 20:39, Ari Krupnik wrote: > I have a smaller glider I fly on RCT motors. 32mm is an oddball, but > the F13 and the G12 are about as slow burn as they get. Gotta love > Blue Thunder endburners! > > Ari. > > > On 3/31/13 8:06 PM, Steve Ainsworth wrote: > >> Ari >> Thanks for the tips. >> That reminded me of back in the late 1990's when I flew one of AT's >> "Turbo" >> hybrid motors that I had inserted/epoxied a spent Estes D motor >> through the center hole of the white lightning grain to prevent >> burning from the center, and epoxied an insulator to the top of the >> grain making it an end burn (the hole was necessary for the N2O flow >> to the cardboard grain). I had the first hybrid motor with tracking >> smoke! BTW, this was all under the supervision of Gary R. The >> flight was at Delmar Dry lake in Nv. >> >> I was also able to fly a Kosden motor with an AT N2O tank added to >> the forward closure for a Kosden "Turbo". Imagine, a combined >> Kosden/Aerotech motor! >> >> Maybe that was the AT Saint Kosden. >> >> I might have to try the I59. >> >> Steve >> >> PS >> I flew my glider on the AT RCT motor. They have an odd diameter. >> >> -----Original Message----- >> From: tccrockets-bounce@xxxxxxxxxxxxx >> [mailto:tccrockets-bounce@xxxxxxxxxxxxx] On Behalf Of Ari Krupnik >> Sent: Sunday, March 31, 2013 10:58 AM >> To: tccrockets@xxxxxxxxxxxxx >> Subject: [tccrockets] Re: Motor request 38mm >> >> I love AT endburners! They are the motors that my Vulcan glider likes >> to fly on more than any other reload. >> >> Nominally, I49 and I59 require a special "endburn-style plugged >> threaded" closure. It's a solid piece of aluminum without a delay >> grain cavity; the reload kits come without delay grains. With an >> endburner, tha danger is that flame front can get around the grain >> and if you burn the candle from both ends, you're likely to overpressure the >> case. >> Pressure above the grain can also try to push the grain down through >> the nozzle, which may plug the nozzle and again result in a burst casing. >> AT's 1-grain endburner (G69N) comes with a smoke grain and uses a >> normal plugged closure, but instructions tell you to inhibit the top >> of the grain with epoxy and the delay grain with lubricant. >> Apparently, for the larger endburners, AT feels that this precaution >> is insufficient and tells you to buy the special closure. >> >> In the photo: regular plugged closure (right) vs endburning closure >> (left). >> >> Ari. >> >> >> On 3/30/13 10:00 PM, JACK GARIBALDI wrote: >> >>> Yes I have all of them below. >>> >>> Jack >>> >>> Sent from my Mil Spec IPhone 4S >>> >>> On Mar 30, 2013, at 9:35 PM, "Steve Ainsworth" >>> <sainsworth@xxxxxxxxxxxx <mailto:sainsworth@xxxxxxxxxxxx>> wrote: >>> >>>> Jack >>>> >>>> Do you have an AT I154J? Or the AT I59WN? >>>> >>>> I would also need the 38/480 casing and plugged FC. >>>> >>>> Steve A >>>> >> >> >
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