Activity

Honeywell sells ring-laser gyros and IMU’s based on them for not a huge amount of money – about $11,000.00 for a flight-worthy unit rated sufficient for rocketry.Warren

The biggest problem with solid-state gyros (the only kind we can afford as hobbyists) is that they are rate-gyros, not absolute position sensing gyros. They’ll tell you the rate of rotation, but drift is horrendous – like ended up 180…   Read more»

The biggest problem with solid-state gyros (the only kind we can afford as hobbyists) is that they are rate-gyros, not absolute position sensing gyros. They’ll tell you the rate of rotation, but drift is horrendous – like ended up 180…   Read more»

Inertial Navigation yes, thats what Dad said the old F-4 use to use. A lot more primative when he was in the Airforce then more recent ones like described before that the airlines used. Dad said it would get you…   Read more»

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, pitch, direction of travel…   Read more»

AdrianThis 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, pitch, direction of travel…   Read more»

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 voltage are recorded at 50 times per second. All the…   Read more»

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 path angle from weathercocking. Also, the accelerometers…   Read more»

Well I want dibs on a production unit Adrian. Any possibility of getting one within the week? I have some F and G motors that go out of cert on 12/31 and I need to make sure I take those…   Read more»

Adrian, that is wonderful news for you. I have a friend who had a TRA record disallowed because the altimeter used was “not on the list”. That would be an obvious downer.I hope to attempt a Tripoli record for the…   Read more»

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 path angle from weathercocking. Also, the accelerometers…   Read more»

Just wondering.Im assuming these altimeters are after AGL accuracy as opposed to MSL accuracy, with no adjustment for barometric pressure. The other day sitting at the table, the alt. told me 4700 ft. The Longmont AP runway is at 5050….   Read more»

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 friends. I offered to provide…   Read more»

What I’d like to know is the specifics of certification. Despite asking, I have no idea what tests are performed. Frankly, I don’t trust any altimeter to be accurate, precise or repeatable based on my experience. The Parrot has a…   Read more»

Cool

I’ll give it a try for sure. I use a 10oz glass aerosleeve sock with West Systems on all my cardboard or phenolic airframes any more just to improve durability. I’m anxious to see these tubes compared to mine. I’ll…   Read more»

Tim, I think the Dyna-Wind is a wonderful product that may be tougher than most expect. Knowing GLR, I’ll bet we could talk Kent into a second layer of glass for those “extreme” blasts, too.I *might* have a real test…   Read more»

After its said and done, If you dont lay the glass perfect (kinda like me) I dont think you can beat it. For 37.50 its done. (no mess) scotte

As I tell Alec, “getting into CSM is one thing. Getting OUT (with a degree) is another”. I wasn’t smart enough to get in, let alone get out.He’s doing just great, but he has a ways to go… We keep…   Read more»

Those women you do see in the hard engineering fields tend overwhelmingly to be Indian or Chinese these days – at least where I work. 3/4 of our female engineering staff are from mainland China and India – most of…   Read more»