Adrian

Do you actually get data back from the accelerameters? Yes, the axial and lateral accelerations are recorded 200 times per second, and the pressure, battery voltage, temperature, and sensor reference...

Scott, The Parrot has both a barometric sensor and an accelerometer. The barometric sensor, despite the issues you bring up, is going to be the most accurate, since it's not dependent on the flight ...

Warren, As far as I know, the only certification test performed by Tripoli was to review my published specs and make sure that I really was selling them as a commercial venture, and not just between f...

I'm happy to announce that the Featherweight Parrot altimeters are now certified by Tripoli for use for altitude competitions and record attempts! I just got the email from Tom Rouse last night. -Adri...

This is a great site, Warren, and I'm glad you're putting in so much effort to keep it up and improve it. And of course, we're never chatty... 🙄

Thanks, John. I was pleasantly surprised, --completely shocked, really-- when I saw that there, because ddmobley didn't tell me he was going to run the story. The quotes were pretty much taken from t...

A delayed Tim is better than no Tim. Light a fire and make some hot chocolate to enjoy the day! I should have listened to Dave2, also. You know it's going to be a bad day of rocketry when:You go to lo...

I'll be there tomorrow, and I'll bring some Parrots.

Scott, if all you need for your altimeter is apogee deploy, I can provide a Parrot altimeter and battery which can fit anywhere. And you would get cool 200 Hz 2-axis accel data for your flight as a ...

I'm planning a dual-deploy setup with a small avionics bay as the coupler between the booster section and the top (main chute) section. I was planning to attach the coupler section permanently to the...

With regards to the strange pressure effects on boost, where was/were your vent(s)? That could have a huge effect on the pressure readings... The vents were just ahead of the front edge of the motor, ...

Well, I still haven't heard back from Tom Rouse recently. Anyone have a suggestion?

Thanks for the launch log update, Warren. But another reason for not putting it down as a record is that I didn't safely recover the rocket, only the nosecone. 🙁 I actually printed out and brought ...

I filtered the accel data with a simple moving-window average before using it to calculate the Cd. I think you're right that the lighter rocket and lower altitude would help also. In the analysis I'm...

I put in the density calculation into my post-flight analysis, and got the following plot of Cd as a function of velocity: This is the same basic shape of the curve as predicted by Rocksim. Tonight ...