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That’s good to know. Thanks Warren. Can you get threaded closures for the Pro54, Pro75 and Pro98 hardware?

Do it all the time on rockets considerably heavier than you can get with a 4″ bird. The UprOar project (8″ O-powered) used a zipperless design with a 1/2″ U-bolt through the zipperless bulkhead.

I planned to use an eyebolt threaded to the motor closure as a back up, but I didn’t think having a single attachment point was appropriate for a large rocket.

I agree with John on this. ANY fabric webbing epoxied to the motor mount will eventually fail – usually sooner rather than later. At that point, the rocket becomes unflyable. I have a PML Io that I’ve been flying since…   Read more»

Epoxying Kevlar is NOT a good idea. It gets brittle, and it *will* break eventually.I always tie into the motor’s forward closure, and I go out of my way to design my rockets to allow for that.If that is not…   Read more»

Upon looking more closely, I discovered that the $8 per piece cost for the 3-axis gyro only applies when buying 100 reels of 5000 pieces, not 100 pieces. And at Sparkfun prices I think that would jack up the new…   Read more»

I was going to say, we need to put a Raven and Telemetrum in a dark box and give them some privacy… who knows what might happen.W

In an ideal world, what I’m looking for is sort of an enhanced Telemetrum with 3-axis accel, rate gyro, mag sensor, temp and humidity sensors and a 100K capable baro sensor – not to mention extended radio range to provide…   Read more»

I’m right with you Warren. If only the Telemetrum had an option to use xbee or other external radio w/serial i/o. You can get the range (40mi) in a 38mm tube using Digi’s XTend modem, with the right antennas of…   Read more»

In an ideal world, what I’m looking for is sort of an enhanced Telemetrum with 3-axis accel, rate gyro, mag sensor, temp and humidity sensors and a 100K capable baro sensor – not to mention extended radio range to provide…   Read more»

I talked to a buddy today who works at Sparkfun about it and it is possible to sub other parts with some trace mods. I haven’t gotten specific with him, just mentioned a requirement for 50G-100G in the Z axis…   Read more»

I agree, the relatively low G rating does limit it’s use somewhat. Although, the ADXL345 is a 3 axis accelerometer, unless I misread the datasheet. On the other hand, 16Gs is enough range for many HP flights. It would’ve covered…   Read more»

I saw this online this morning and have been thinking about it ever since. The $90 pricetag is a bit steep for me now, but I have 4 Arduino’s on the bench – 2 standard units, a Pro and a…   Read more»

I’ve seen and played with a venturi vacuum generator, but didn’t think it could pull as much vacuum as I wanted. I ended up buying a surplus vacuum pump from Aircraft Composites I think it was. Cost $130 or so…   Read more»

This is Warren’s specialty. No one does vacuum bagging better… Warren?

The surface mount stuff isn’t too bad IF you have a good binoc-scope, fine tweezers, very fine point Metcal, and good flux. I can do 0402 components pretty easily, but get too messy on fine pitch (<.5mm) packages, though!-KenI used…   Read more»

I got a hot-air rework tool a few months ago, and since then I haven’t used my soldering iron much. You can squeeze out some solder paste through a syringe, smear it over all the pads, and it will ball…   Read more»

The surface mount stuff isn’t too bad IF you have a good binoc-scope, fine tweezers, very fine point Metcal, and good flux. I can do 0402 components pretty easily, but get too messy on fine pitch (<.5mm) packages, though!-Ken

Very cool, Warren. Stiffest standards, as you know. I made telemetry transmitters in the late 60’s with a soldering gun, of all things, until my Dad bought me a soldering iron. Made quite a difference.