Mostly from a technical curiosity point of view I am exploring options. Any system that can power an igniter can be modified to drive a motor or latch. Has anyone gone this route?
Andrew
Troy
Looks excellent. Would you perhaps sell any of these units?
Way back when, Estes has a series of rockets powered by freon. The ejection was by spring power, and held in place by two "bladders" that were inflated by the freon in the engine.
Estes or Vashon? iirc Vashon had the cold power and Estes has always been BP or Composite motors. I however am not real familiar with Estes products prior to 1975.
Estes bought the Vashon line and sold it for a few years under the Cold Power line - they sold both the Valkyrie I and II rockets plus several models that had a cold power motor inside a standard paper body tube (these were convertable and would fly on either freon or you could put a regular BP motor in instead). Check out the 1973 catalog on Ninfinger for the entire line.
I did some ejections using compressed air.
Air was in a plastic soda bottle at 120 psi, valved using thick tape as a burst disc. An e-match heated the tape till it fails releasing the air. Parts were way more complicated than this description.
Plan was to replace the e-match with a hot wire but it didn't happen.
M
Estes bought the Vashon line and sold it for a few years under the Cold Power line - they sold both the Valkyrie I and II rockets plus several models that had a cold power motor inside a standard paper body tube (these were convertable and would fly on either freon or you could put a regular BP motor in instead). Check out the 1973 catalog on Ninfinger for the entire line.
Oooh, this gives me an idea. As you go up ambient pressure goes down, right? You can tune the pressure and seal disk strength so the bottle would release pressure at a specific altitude :=)
OK, I'm going away now.
Ari.
I created Chute Release in time to use it for my L2.
If I ever decide to step up to the L3, I'll develop an electronic separation product in time for that. I'd love to get rid of the soot and ejection damage on my rockets and parachutes. If you think about it, it's time we just bought engines that focused on the "up" part, and stopped futzing with them to set an estimated ejection delay.
congrats on the twins Troy, I had a couple of quite year rocketry wise after our twins were born...Hopefully early next year I'll produce a small production run. Well... I need something to justify the hobby lathe I'm in the process of purchasing It was suppose to happen this year, but moving house and twin babies killed that idea.
Troy
congrats on the twins Troy, I had a couple of quite year rocketry wise after our twins were born...
The V2 deployment BTW was brilliant. Pretty sure the nose got an extra 50 feet or so when ejected.
Very clever. Well done.My 100% pyroless deployment device that I've been flying since 2010
https://www.propulsionlabs.com.au/Pyroless_Release/
This is used in conduction with a larger latch mechanism of similar design to provide 100% pyroless dual deployment in my 90mm HPR rockets.
and the 100% pyroless separation system I developed for the 1:1 scale V2 rocket launched earlier on in the year:
[video=youtube;y7HT6eOhUOU]https://www.youtube.com/watch?v=y7HT6eOhUOU"]https://www.youtube.com/watch?v=y7HT6eOhUOU[/video]
Troy
Very clever. Well done.
Two questions.
1.) Did you explore the option of including the 8 or 16 g CO2 cylinders into your design to eliminate the need for a filling system?
2.) Did you consider using a gas piston ram to push off the NC versus pressurizing the airframe volume?
You mechanical release mechanism is simple and elegant. :clap::clap::clap::clap::clap::clap:
Bob
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