Hifin Sword
Well-Known Member
I need help. I got into rocketry this past year with my g/kids b/c I thought rockets would be easier than hauling my RC Fixed wing a/c hours away. As far as space in the car it is easier. But getting parachutes to deploy properly seems to be hit and miss.
I'd say about 1 of of 5 times the chute fails to come out properly or in some cases, NOT AT ALL. I built a BIG DADDY and watched it go up and come down HARD AND FAST. Had it hit anyone, things would have been bad. It was in a city park, only my family was there, and it wasn't a close call. But still, you don't want a rocket falling nose first with no chute.
I had already decided to build a BIGGER DADDY using a 2nd body tube and coupler. I thought instead of the parachute charge discharging inside the rocket body, have it vent to the inside the nose cone. That would save any scorching or melting of the chute, and eliminate the chance I packed the wadding too tightly. This I suspect was the cause of the chute not deploying in at least 1 case.
My build has the smaller center rocket engine tube, extended all the way up to the nose cone. The normal exit for the chute charge exhaust just above the rocket motor was fitted with an already used rocket engine that is cut off so that the clay vents the gases. Hopefully that will help keep the hottest gases away from the normal stop piece where the extended tube starts. I also painted the inside of the discharge tube and the bottom of the nose cone with some HIGH HEAT PAINT. I opened the hole in the bottom of the nose cone some to better fit the end of the discharge tube which fits flush against the nose cone now.
Has anyone tried this? Do you think it will work? Any comments on what not to do or any cautions with this setup?
Don
I'd say about 1 of of 5 times the chute fails to come out properly or in some cases, NOT AT ALL. I built a BIG DADDY and watched it go up and come down HARD AND FAST. Had it hit anyone, things would have been bad. It was in a city park, only my family was there, and it wasn't a close call. But still, you don't want a rocket falling nose first with no chute.
I had already decided to build a BIGGER DADDY using a 2nd body tube and coupler. I thought instead of the parachute charge discharging inside the rocket body, have it vent to the inside the nose cone. That would save any scorching or melting of the chute, and eliminate the chance I packed the wadding too tightly. This I suspect was the cause of the chute not deploying in at least 1 case.
My build has the smaller center rocket engine tube, extended all the way up to the nose cone. The normal exit for the chute charge exhaust just above the rocket motor was fitted with an already used rocket engine that is cut off so that the clay vents the gases. Hopefully that will help keep the hottest gases away from the normal stop piece where the extended tube starts. I also painted the inside of the discharge tube and the bottom of the nose cone with some HIGH HEAT PAINT. I opened the hole in the bottom of the nose cone some to better fit the end of the discharge tube which fits flush against the nose cone now.
Has anyone tried this? Do you think it will work? Any comments on what not to do or any cautions with this setup?
Don
Attachments
-
DSC05264.JPG3 MB · Views: 0
-
DSC05266.JPG3.1 MB · Views: 0
-
DSC05270.JPG2.7 MB · Views: 0
-
DSC05272.JPG1.9 MB · Views: 0
-
DSC05293.JPG2.2 MB · Views: 1
-
DSC05298.JPG669.8 KB · Views: 0
-
DSC05306.JPG740.9 KB · Views: 0
-
DSC05263.JPG3.2 MB · Views: 0
-
DSC05294.JPG1.8 MB · Views: 1
-
DSC05303.JPG2.2 MB · Views: 0
Last edited: