Adrian

Since there is a roll-off in drag above mach, there is an advantage to being light enough to get "over the hump." Maybe that is both the core of RockSim's problem and the secret weapon to higher altit...

I think it would be good to avoid the hassle of deposits or rental fees. Normal motor case rules would apply. If you can't return it, then replace it. The replacement cost of the altimeter would be...

I'm almost done developing a new line of altimeters based on an ultra-accurate digital-output pressure transducer that is calibrated over temperature at the chip factory (as opposed to by me). One mo...

It's tempting, but in order to get the Raven altimeter done, I'll have to skip some launches like the upcoming Hartsel one to carve out more time for firmware development. Good luck on finding Synergy...

I have one you can use. It has a short section of 24mm airframe tube in it, some lead shot, and a section of kevlar cord glued in. The base of the cone is also sanded down so it's flush with a thin ...

The optimal mass varies a lot with the rocket drag. With a draggier rocket it helps to have more mass, and less mass for a lower-drag rocket. I left mine relatively light because there was so much va...

Darn. If it opened at 11:15 I would have been covered.

Hmm.... My rocket landed stayed within the larger high-altitude cylinder, so this could be very close, depending on when the window for Ed's flight was opened. Do you recall the time? Thanks.

Thanks Joe and Ed. I got the temperature corrected altitude from: Correcting for the fact that the ambient temperature was warmer than assumptions used in the standard atmosphere model, the peak alti...

Lots more data (cross-posted at Rocketry Planet) Here's more data from the new Featherweight Interface program:Altitude and temperature, for the whole flight: Velocity, accel, and altitude up through ...

I had my talk with Bob when I was just west of "L" on the Mike's map. Bob said that the Pawnee National grasslands don't go any farther North than the line at the bottom of L.

Another couple of fun facts: Right after burnout, the rocket was going 1440 mph (Just under Mach 2.0), and had 14 Gs of drag. The burn time for the I600 was just under 2.0 seconds, which is the same ...

Woo Hoo!😀 😯 😀 The two Parrot altimeters read 15960 and 15969 feet AGL at the instant of the apogee deployment charge, which was about 1.5 seconds early. After deployment, there are plenty of data p...

Violent Agreement has been found! I'm downloading the data now. Larry Haynes thoughtfully organized an aerial search, and today around mid-day we went up in his friend Steve's Cessna and headed for th...

My hybrid went 7500' on a Contrail L1428. It landed 300 yds from the launch. The hike I went on was for a 2" carbon bird built by Sean Serell. It launched on a CTI L990 and went an altitude that was...