Activity

Here’s the root causeHere’s the short version: I’ve been playing with a GPS that transmits its locations on the MURS band around 150 Mhz. I inadvertantly had wires within the 5″ dia x 12″ long L3 avbay that were of…   Read more»

I only have two duel deploy.One 3″ and One 5.5″.Both use the RRC2X.Used Conway’s calculations on both. Both have worked perfect.My third duel will be launched at MHM 08. I feel 100% confidentin the Missile Works RRC2X, Missile Works Pet…   Read more»

Plus, Conway, didn’t you use a mini on your L3, if not for the certification flight, definitely right after? Ken, that’s not the issue. Hang in there…No, I didnt use a mini. Ive used RRC2x,2 differnt ARTS, and an RMCS,…   Read more»

Plus, Conway, didn’t you use a mini on your L3, if not for the certification flight, definitely right after? Ken, that’s not the issue. Hang in there…

Having said all that, what really troubles me is that both altimeters were in the exact same bay, under the exact same conditions yet only one of them fired prematurely – twice. This suggests rather strongly to me that, rather…   Read more»

Ken, I have two mini’s and plan to use one on my next “big” rocket and one for J’s-K’s. Just kinda hang in there. Mike’s av-bay environment was unique, and he will explain as soon as possible.JW has a good…   Read more»

Ok first to explain the formula I have used. The formulas like the one in Mark Canepa’s book have one issue as airframes increase in diameter the port also has a tendency to get exponentially larger then it should thus…   Read more»

Hi Mike,Since I’m also in the middle of my L3 I have been running these same calculations. What happened to you on Saturday concerns me, as I also have an RRCX mini. According to my calculations, I don’t see a…   Read more»

Here is the formula I currently useBay Volume = radius * radius * length * PiSingle Vent Diameter = 2 * SQRT ( volume * 0.0004908 / Pi )Single Vent Radius = Single Vent Diameter / 2Single Vent Area =…   Read more»

I know, guys, we’re just tap dancing here until Mike reveals his findings…if Mike’s calculations on MWC’s are correct, and I feel they are, 0.196 inches is 4.78 mm (0.196 * 25.4), close enough for (6) 5 mm holes.Here’s my…   Read more»

My questions on the ports and their size wasn’t referring to Mikes Failure. Just seemed when he posted how many and how large they were that he might have to much and could create an issue only under flight.Here is…   Read more»

A mathematician confidedThat a Mobius band is one-sided.And you’ll get quite a laughIf you cut it in half,For it stays in one piece when divided.

Hey Bruce, those of us who studied English have to stick together. I hear ya’. Incidentally, my wife gave me one of those t-shirts that says:ENGLISH MAJOR(you do the math)Now if someone needs a sonnet written about their project, Bruce…   Read more»

Definitely not the ports, and, JW, you’re right that certainly wouldn’t have set things off. That issue would only have an effect during flight. Mike will say what happened when he’s 100% positive why what happened did. That sentence from…   Read more»

To clarify, having too many or too few ports, too large or too small should NOT cause your altimeter(s) to fire when you power them up. If the ports are too small, that would not do it. If they were…   Read more»

So you have .588 in^2 as your area that you need in holes. So now you wanted 6 holes around the airframe. This would be .588 in^2 /6 or .098 in^2 for each hole. A = pi*r^2 so r =…   Read more»

So you have .588 in^2 as your area that you need in holes. So now you wanted 6 holes around the airframe. This would be .588 in^2 /6 or .098 in^2 for each hole. A = pi*r^2 so r =…   Read more»

Mike,6 x 5mm? What is your avionics bay specs? Length and Diameter?

5″ diameter by 12″ Long. Here’ s the MW Guidlines with my calculations in red (FYI, all this is on my web site):

I’ve used one static port on probably 95% of my rockets. I did use 3 on my L3, but I think that is the only time I did so. That was a very large ebay, and the requisite hole was…   Read more»

Forget all this rocket stuff… there’s one really important point… why do I look like Kenny in South Park in Mike’s picture?

Awesome!