Adrian

Wow, Art, that is one impressive bird, and very well documented. I'll be coming back to study this some more to learn how to do a big project right. I can't wait to see the film.

John, When I get home I will, though you would have to upgrade to Rocksim 8 to read it. Your responses on the heating are encouraging. I looked up cotronics, and they have an epoxy that looks good, w...

I'm almost afraid to ask, but how much does a K250 cost? I've still got quite a few rockets to build and fly before then, but someday I might like to go for the K record.

I just did a sim. Yeesh. Over 100 Gs for a full second, and a top speed of about 2300 mph, assuming the fins stay on. There would be 80 lbs of drag, of which 20 lbs would be on the fins, or about 6...

Yeah, I would be concerned about the fins getting too hot and the epoxy softening too much. I heated up Barack-it to get the motor out (thanks for the tip, Warren) and was surprised how much more fle...

Cool. I'd like to build a min-diameter carbon rocket around that sometime. 2000 mph would be a fun goal.

Yikes. Maybe if I heat it up that will help soften it. The fins are quite stiff and strong but I wouldn't know that I'm pushing too hard until it's too late. I'd like to re-fly this with G80s (or ma...

John, You're right, I had been pushing too close to the edge, and over the edge in a lot of cases. But this one was built with G80s and H motors in mind Here's the picture I sent in with the record f...

Adrian, congratulations on an awesome boost, and welcome to the TRA record club Smile How did the boost compare to your simulations? I saw the pics from the launch (posted on another forum) and it loo...

At the Tripoli Spring Fling today, Barack-it went to 7492 on an F10. The previous record was 6785. Tripoli record forms are filled out and I'll mail them in tomorrow. More pictures and graphs to ...

Are your cells bare, or do they have cell protection circuitry built in? If they have the protection circuits, you would need to watch out for the protection circuits cutting off the current and star...

The Parrot uses a single (3.8V) 70 mAhr cell that is semi-permanently affixed to the altimeter. The USB interface for the Parrot charges it whenever it's plugged in. The deployments require a separat...

I believe the software is done, but I'm still waiting to get a panel of Parrots back from my surface-mount assembler. Then I'll try to ship about a week after that.

I spent all of Saturday doing calibrations on a 250-G prototype version of the Parrot V2, tweaking the flight code to avoid numerical overflow with the higher-G sensor, rebuilding the av-bay, and doin...

If you're curious enough, do your own test and use a Parrot to measure the drag differences. Since you're measuring the drag force rather directly, the results won't get affected my motor impulse var...