Hello everyone!
This past saturday I flew a 2 stager, I245G to G76G. 54mm booster to 38mm sustainer. Both stages recovered and the sustainer reached 7906 feet. Everything was successful except the main parachute not fully comming out of the nosecone resulting in 2 broken fins on impact.
Electronics were 3 eggtimer quantums. One in the booster and two in the sustainer. There was a 1g charge for stage seperation right after motor burn out and 2.5 second coast on the sustainer.
The sustainer casing(aerotech hobbyline 29/40-120 casing) was modified for HEI(Head End Ignition) by simpilly potting the igniter into the foward closure. This worked flawlessly.
Tracking in the sustainer was done with a eggfinder mini and the booster was tracked with a BMK radio beacon paired with a 7 element yagi antenna on the reciever.
Build and launch photos.
The blue interstage here was later swapped to a new design.
The change that was made was insetting the sustainer into the booster airframe section allowing the full stack to be much more rigid essential for a straght flight.
The booster fincan
The booster fincan was mounted in a way to allow free rotation of the fincan to reduce spinning on the boost stage.
Launch day:
View attachment _IMG1451.JPG
View attachment TST Flight Video.mp4
This past saturday I flew a 2 stager, I245G to G76G. 54mm booster to 38mm sustainer. Both stages recovered and the sustainer reached 7906 feet. Everything was successful except the main parachute not fully comming out of the nosecone resulting in 2 broken fins on impact.
Electronics were 3 eggtimer quantums. One in the booster and two in the sustainer. There was a 1g charge for stage seperation right after motor burn out and 2.5 second coast on the sustainer.
The sustainer casing(aerotech hobbyline 29/40-120 casing) was modified for HEI(Head End Ignition) by simpilly potting the igniter into the foward closure. This worked flawlessly.
Tracking in the sustainer was done with a eggfinder mini and the booster was tracked with a BMK radio beacon paired with a 7 element yagi antenna on the reciever.
Build and launch photos.
The blue interstage here was later swapped to a new design.
The change that was made was insetting the sustainer into the booster airframe section allowing the full stack to be much more rigid essential for a straght flight.
The booster fincan
The booster fincan was mounted in a way to allow free rotation of the fincan to reduce spinning on the boost stage.
Launch day:
View attachment _IMG1451.JPG
View attachment TST Flight Video.mp4