Bret Packard

I've never thought about doing zipperless with motor ejection, are you suggesting drilling holes in the bulkhead?

How are you guys anchoring your recovery system on your LD's? I figure I'll go with an epoxied eyebolt in the motor ejection well when I fly it DD, but I'd like to be able to fly it motor ejection as...

Thanks for the pic Tony. Warren, can you explain the "z-fold" a bit please? This is great information guys and I really appreciate it!

Great post James, and it hits on one of my biggest concerns for this L3 project, ejection charges. How do you figure out how to compensate for altitude? I've always ground tested my stuff, but how v...

Can anyone post a picture of a DC 30 or DC 40? I have a DC 20 but I'm not excited about modifying the antenna mount and it just takes up too dang much space in the stock configuration. It appears fr...

So the graph that it plots for you isn't accurate? I use this feature all the tim but I haven't built anything yet that I've flown enough to really test it's accuracy.

And these are the areas were I think the "how hard should you push it on a cert flight" comes into play. While pushing the envlope is certainly part of the fun in our hobby, how far can you push it r...

I find it interesting to read about what different people think is or is not a KISS design. For me, the way most of us overbuild, I think structural failure is really pretty rare . Most of the failu...

Thanks Bruce. That fin pattern tool is awesome. Anyone else with L3 words of wisdom to share? Kinda surprised there hasn't been more here, because sure as heck once I certify L3 I'm going to know EV...

Is there a resource or rule of thumb for deciding how many layers are needed on a composite airframe tube. I want to try rolling a 38mm carbon tube, 5.7oz cloth, and trying to keep it light. For thi...

If anyone has one they can bring to the meeting I would appreciate it. I just bought a new dc20 from ebay and I want to make sure it works properly. Thanks!

I have a buddy who is a civil engineer and it occured to me today that we submit our As-Built drawings to the governmental jurisdictions on mylar. So I grabbed partial roll of it from him to try out....

There is a fundraiser that I attend every year for the Wings Over the Rockies Air and Space museum. This is an organization that I support both personally and through my business because of the aweso...

I was going to hit Ft. Collins Plastics on the way up to the annual meeting. They only carry .010" mylar in stock. Will that work OK? Do I need to use a wax or release agent on the mylar?

I'm not sure what is worse, you suggesting that or the fact that I like the idea 😯