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Maxi 4" Boyce Aerospace Hobbies Pershing Build Thread (1/10 scale)
- Thread starter ljwilley
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ljwilley
I’m pretty sure it will work…
My youtube channel is basically a buch of shorts of rocket launches I have recorded. At least, those are my best videos!
Here it is:
https://www.youtube.com/@TheRocketryWorkshop
Here it is:
https://www.youtube.com/@TheRocketryWorkshop
Where are the Maxi 4" Boyce Aerospace Hobbies Pershing videos?
ljwilley
I’m pretty sure it will work…
I am sitting in my hotel room, and I just launched these today. Going to head back to my house tomorrow. I have 45 videos of various flights from the launch that I plan to post on you tube each week, but not all at once. They get more views when I stagger posting. Anyway, the reason I didn't post it here a minute ago is because the video was too long and it wouldn't let me. My video editing software wouldn't work. But now it is working, so here is the video:
Where was your CG and what was the caliber of stability for the motor that you used?
Did you see Frank Burkes' Rocksim file in the link in post #3?
Did you see Frank Burkes' Rocksim file in the link in post #3?
ljwilley
I’m pretty sure it will work…
The stability was supposedly margin 1.5, according to the Rocsim file I did, when I put in the CG I had measured on my rocket. My CG was also about where Frank Burkes' was, so I'm not sure what I did wrong. I will be more careful in the future.
So sorry to hear of your ill fated flight.Well, I guess it was unstable after all.
Today I flew it, resulting in the nose cone breaking in to pieces and the body tube shredded upon impact. Will never fly again. I did get a cool video for my you tube channel, and a good lesson learned: swing tests don't mean squat. Anyway, just make sure to add a LOT of nose weight. I mean A LOT
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I’ve purchased blue tube for my build, hoping to add durability. I’m considering lead shot mixed with epoxy for nosecone weight.
Look at your video frame by frame at ignition. I once had a very stable Nike X go sideways. Wtf? We noted the shape of the plume wasn't symmetrical. This was a Quest D20W a long time ago.
ljwilley
I’m pretty sure it will work…
Yes, the Quest D20s are purposely built for the nozzle to erode for safety reasons, which doesn't always go as planned. I have launched them before and they tend to go at a slight angle because of this.
Possibly the printed plastic didn't hold the nose weight? When I did v1 of the mini-magg, I cleaned the interior of the nose cone with soap, water, and then high grade alcohol. Did the wooden dowel through the nose (HATE doing that, it adds lots of finishing work) and then Aeropoxy and BB's. This held even though its last flight was ugly - it's where I figured out (after 3 rockets) that my Jolly Logic truly didn't work. Sigh.
It could be the printed plastic wasn't compatible with the glue or something like that.
On the swing test, they are pretty unforgiving but may not simulate a high wind day. Usually a swing test is 100% to me.
Sorry - it looked absolutely perfect. I did the BT80 version and never got around to flying it.
Cheers / Robert
It could be the printed plastic wasn't compatible with the glue or something like that.
On the swing test, they are pretty unforgiving but may not simulate a high wind day. Usually a swing test is 100% to me.
Sorry - it looked absolutely perfect. I did the BT80 version and never got around to flying it.
Cheers / Robert
