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Wow, those are some fast landings. Thank you guys. I do hear that sometimes there are lucky fluke landings however I am a little more confident about taking a chance with a strong rocket on good terrain.

I really like the idea of the L1 without a chute landing. And low power that happen to tumble nicely. My OpenRocket is much less forgiving. Nasty warning messages when my chutes deploy at high speed or for landings. It wants me to buy bigger parachutes.

I know there have been lots of discussion about how fast your rocket descent can be but I have found people don't go into enough detail on their rule of thumb. I would like to know more about how fast you can come down with specific details on ground conditions and construction design because I...

No, that does not follow logically. Anyway, I appreciate the input from those that contributed but I think this is where it can die off. I will ensure I use new batteries in the future (best suggestion). Thanks Andrew Sent from my iPad using Rocketry Forum

Sorry, I don’t get it. The top screws on. This part is outside of the body and doesn’t make a seal. There are lots of holes. A complete ring of them. I actually think its fairly obvious. Sent from my iPad using Rocketry Forum

No this has never flown before. There was adequate air Picture was from a few years ago, only to show the nose cone ebay. Can’t take a current picture as the nose cone didn’t survive. Older version had different electronics. Experiments. Sent from my iPad using Rocketry Forum

No data. Strat didn’t want to turn on. Noticed at least one SMD resister off so I think it was unhappy with the landing. Sent from my iPad using Rocketry Forum

I found an old photo of the nose cone. Top unscrews while still connected. Their is a generous gap. Didn’t take a photo with the electronics in but it was on a sled around the central spine. All was secure including the battery. Also, yes it was on when launched. Had to listen to the...

Not a high G flight so unlikely cell separation. I was using the speaker connection which is pretty good retention at low velocity. Nose cone was pretty banged up and I didn’t check if the wires were still connected at the time. Should have, lesson learned. I have seen other people use these...

Nothing special. I have a variety of ematches I use from fireworks. Matches are very reliable. No issues there. Sent from my iPad using Rocketry Forum

Hi I was launching a rocket on the weekend and can’t explain the failure. It was a perfectflight altimeter launched dual deployment in a mid sized rocket. G motor. Altimeter was in the nose cone with plenty of ventilation. Charge cap was used for the drouge. Cable cutter was used for the main...

Granted, I don't need the relays now. However, this technical point doesn't make sense. How could a relay on the igniter leads possibly cause an altimeter to reset? It reacts well to continuity loss and regaining. I will seek further clarification from Eggtimer regarding the NAR and tripoli...

I see the requirement for a switch on each ematch has changed. Thank goodness. This makes it much easier in that I don't need relays in the first place. Ok then. And yes, the quantum becomes the solution of choice. Thanks Andrew

Actually, the wifi switch (user manual pg 16) is rated 4-16v. It mentions 3.7v lipo as a substitute with reduced range. While I agree that shunting adds more complexity than its worth, I understand its a requirement for lv3 electronics. Not my choice. Similarly a mechanical switch is...

Two leads for igniters. One connects to relay the other to the strat. Wired in parallel. Just at opposite ends in the picture. Std 12v relays, mechanical. Small reaction time to close is not an issue. They are powered up at launch, not firing. They will be in contact by time of firing...

I have been experimenting with the wifi switch in preparation for lv3 electronics deployment. I have taken a long time away and just getting back into things and need some updated advice. Previously I was working on a 54mm Tomach but found the small size Avionics bay a huge challenge. One...

I wanted to add an additional thanks for posting. I was pointed to this thread for asking a similar question. I found the discussions very helpful, particularly including the details on atmospheric drag.

John, perfect. That helps a huge amount. Glad to know that others are thinking about it. Interesting that it led to such a passionate discussion but nice to know that we have passionate engineers in our midst willing to simplify a complex problem for us. My key word searching on the forum...

Well, it really is a physics question that applies to each type of rocket. It does not appear to be a significant issue in low power due to friction being a function of velocity. Crossfire, your point gets to the heart of the issue. When is friction fit sufficient, and when is it not? When...

Hi I have been thinking of the problems of booster stage separation. I know the simple solution is to put in nylon screws to prevent it and then ensure sufficient pressure to force separation at the right time. When are the screws required? I have been looking online regarding drag...