Adrian

Well, my vacuum pump really sucks after all. In a good way. It turned out that one of its fittings was loose, so once I fixed that, it really pulled it down hard. It inverted the lid of the rubberm...

Chris, How did your Cirrus mass compare with the optimal mass for that motor?

We need to buy GLR's. Thoughts on my suggestion re: the upper ring? Looking at the picture, the supports appear to be 1" square steel tubes. If the base that they're welded to is beefy enough, I bet ...

Fun google tip: Type "25 inches of mercury in Pa" in Google search (or your Google toolbar) and it will tell you the answer. I use Google now for my calculator whenever I'm at a computer. BTW, 84.6...

Yeah, where did you get your pump? Santa brought me one for Christmas from Aircraft Spruce that I thought was going to suck out at least 80-90% of atmospheric pressure, but sadly it doesn't suck that ...

This looks like a great option to me, too. 7 feet, and it looks like it adjusts down to arbitrarily small diameters. Sweet.

If I remember correctly, the existing bicycle tower could probably be lengthened just by replacing the 6 pieces of conduit with longer ones. If we lengthened it to 5 or 6 feet could it still fit in t...

At the meeting there was strong interest from a number of people in the room. Besides being too small for really large rockets, the bicycle wheel tower is also pretty short. I'd sure love to see a ta...

His Cirrus Dart went about 11,950'. There was very little wind, he launched from a tower and it was plenty hot. Also note that he used an electronic timer for deployment; this rocket and motor comb...

Sorry Scott, somehow I missed this post earlier. I get the surface mount parts assembled at Advanced Assembly, thank goodness. If I had to do all the surface mount parts myself I'd have to charge way ...

Thanks, Warren. I've also been thinking about a dual deploy altimeter similar to what you're describing, but it's going to have to wait until I get done with the Sparrow and Hummingbird.

I've been shipping the Parrots out at a rate of about 3-5 per week, and I'm down to the last 6 that are ready to go out the door. 😯 It's looking like I may run out before Christmas, so I'm posting th...

African Greys are amazing. I'm sure you have some great stories.

Yeah, but first you'd have to train it 😉 Actually, Robert deHate (picoalt guy) says he's made one like that. I don't know the details, though.

This maybe a little off topic maybe not. I dont totaly have a clear picture of accelorometers. The fellow I was talking about earlier Used them to measure a flight from Boulder Airport and track Roll,...