L3 Project Construction Tips

[Bruce R. Schaefer]

are you using only 2 charges and a match for each and then another mach to the same charges from the WRC or do you have a charge just for the WRC? I was under the impression you had 3 charges.

Four, primary has one each for the drogue and main, as does the redundant (WRC2). Nothing in parallel. If there’s something wrong with a charge (e-match), I thought it might be better to use a separate canister for each. Is that okay?

[James Russell]

So 2 drogue and 2 main and then 1 WRC apogee charge and 1 WRC charge for the main chute.

[Bruce R. Schaefer]

So 2 drogue and 2 main and then 1 WRC apogee charge and 1 WRC charge for the main chute.

Just 1 drogue and 1 main charge for each of the primary and redundant electronics, for a total of four charges. The two electronics have separate charges. The redundant ones will have that extra gram. And for the record, I will test each e-match for continuity before I use them. I’m wiring it up this week, and I can change it. Let me know.

[Conway StevensParticipant]

Bruce how many altimeters are you using for deployment. (NOT including the WRC) then how many e matches per each event from those altimeters? as well as How many charges per those events on those altimeters. (again not including the WRC) then does the WRC have its own match and charge for its events?

Is there just 1 altimeter for the primary and the only redundant you have is the WRC? Or is there another Redundant actual altimeter?

Exaample would be like what I did. I had a RRC2X and it had 1 match per event and one charge per event. Then I had an ARTS and it had 1 match per event and one charge per event. If I were to use a WRC on top of that I would have done even 1 more match per event and one last charge for just the WRC per event.

[Bruce R. Schaefer]

Exaample would be like what I did. I had a RRC2X and it had 1 match per event and one charge per event. Then I had an ARTS and it had 1 match per event and one charge per event. If I were to use a WRC on top of that I would have done even 1 more match per event and one last charge for just the WRC per event.

Only one accelerometer/altimeter (backsky) as the primary for ap and main; the WRC2 is the sole redundant system for ap and main. Each with one charge for each event. I can add another altimeter and parallel it with the primary charges. But is triple protection necessary? Wish my RRC2X hadn’t gone belly up; I can use my little miniAlt PerfectFlite, though I haven’t used that one yet. I’ll just have to see what James recommends. Thanks for your input, and keep it up.

[Conway StevensParticipant]

I may be wrong but judging by James comments above he may think you are doing something different.

>JamesR
>PostPosted: Thu Apr 19, 2007 7:36 am Post subject:
>are you using only 2 charges and a match for each and then another mach >to the same charges from the WRC or do you have a >charge just for the WRC? I was under the impression you had 3 charges.

Sounds like James believes or is expecting there to be 3 charges for each event. One fo 1 primary altimeter one for a secondary/back up altimeter and the WRC as a “Oh Crap button” just in case. I might be incorrect there but to me it sounds like what he is asking for. As he is the L3cc and TAP and I am just another guy going to witness and sign off I would recommend getting clarification from James and what he wants and is required.

[Bruce R. Schaefer]

Sounds like James believes or is expecting there to be 3 charges for each event. One fo 1 primary altimeter one for a secondary/back up altimeter and the WRC as a “Oh Crap button” just in case. I might be incorrect there but to me it sounds like what he is asking for. As he is the L3cc and TAP and I am just another guy going to witness and sign off I would recommend getting clarification from James and what he wants and is required.

That “Oh, Crap button” takes up a lot of space. Ha! I still have time to order and get another RRC2X and install it. I love that altimeter and am going to replace it anyway–should have sent it in before the warranty ran out. Then, I won’t use the WRC2. I’m waiting for some O-rings before I continue with it, and they should be in tomorrow. I’ll wait for James’ response.

[Bruce R. Schaefer]

Got an e-mail from James, and I can use the blacksky as the primary and WRC2 as the redundant. It was my mistake for the confusion. An early version of my documentation has the RRCX2 (still gonna buy another one when I can) as an option for the WRC2, because I didn’t know if I could afford the WRC2. A great rocket guy lent me his, Tim Thomas lent me his motor casing (75-6400), Art is painting my rocket, and, Conway, you offered your L3 chute. I managed to buy one of those. I didn’t want to fry yours. Fortunately, the ground testing didn’t singe my dummy. No one does this alone, and my responsibilty to pay forward and back has really grown on this project. I am grateful to all! As Joe said at the last launch, “I love this club!” You know, when I see everyone at the bottom of the hill at the North site, I feel like I’m coming home.

[Chris LaPanse]

Did you go with the rocket rage, like Conway has (I have a few too, though not in that size 8) )?

Those are great chutes…

[Bruce R. Schaefer]

Did you go with the rocket rage, like Conway has (I have a few too, though not in that size )?

Those are great chutes…

Oh, yeah! But wait until you see Justin’s RR130! The ones we used were RR70’s.

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