Warren B. Musselman

Ed - I like the double centering ring approach for the booster retention u-bolts, but do you think it is stronger than just stacking a pair of rings together? Surface area of the glue joint would be t...

Those U-bolts are there purely for backup in case the eyebolt in the motor closure fails or unscrews itself. I use 1/4" quicklinks - 1 per U-bolt and I have a short loop of sewn kevlar set up in a loa...

Hmmm - don't know why I didn't reply to this when it first showed up. Glass - good all around use. Cheapest option. E-glass is standard, S-glass is lighter for a given strength. Kevlar - Impact resist...

There have been a few threads recently that got me to thinking that perhaps I should put together an article on my L3 project. This project was an all-composite build with a number of features that I ...

Look for a detailed article in the next 24 hours regarding my L3, vacuum-bagging and recovery systems in the Composite Construction forum. Warren

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

I'll stand by my statement - don't glue in webbing as your shock cord anchor - regardless of the material. In a 4" bird with a 54mm motor mount you can easily use a forged eyebolt and washer or a u-bo...

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 th...

I'm in Longmont most days, be glad to shoot the shit - no need for the beer or bourbon.

For another point to add, I have epoxied 1/4-20 eyebolts into Pro-38 ejection wells after removing the ejection charge. Rough up the inside of the plastic well with 80 grit sandpaper and they hold ver...

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 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...

Threaded forward closure in all cases. Alternative for motor cases without a threaded hole would be a bulkhead on a T-nut plus tape to prevent rear-ward loss of the motor case. CTI doesn't have that o...

I'm a firm believer in zipperless booster designs with a threaded rod going through the zipperless bulkhead to an eye-nut on MD projects. Problem comes when you're talking about single-use motors.

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 Mega - that I...