JumpJet
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- Joined
- May 19, 2011
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I just wanted to share a different way I came up with to ignite the upper stage engine on a scale type model like the Aerobee series of sounding rockets use. I created this about 9 years ago. I did one static test where the upper stage motor ignited. A while back I asked Steve and Emma Kristal if they could perform a firing test on a second unit I built using their high speed camera, so I thought I would share some images and video. Its a little hard to see but you can see flame coming out the top of the staging system. The unique aspect of this stager is that the flame, heat and particulates that are generated from the burn through of the 18mm booster motor gets split into three separate streams that travel up 3/16 dia. K&S aluminum tubing; they then recombine at the top into a single mass to ignite the upper stage motor. All the parts show in the cad images were created on a rapid prototype machine, except of course for the three aluminum tubes. The different color pasts are the parts grown in the machine. Shown are two separate Red parts that were in fact a single unit but I separated the part so it is easier to see what it looks like.
John Boren
View attachment Aerobee SloMo .zip
John Boren
View attachment Aerobee SloMo .zip