edward

Yes, there are. I generally use 1/2″ with 1/16 walls, and have gone up to 5/8 with 1/16″ walls.Edward

Since I’ve discovered the surgical tubing I’ve been using it exclusively. So easy to make the charges and they are in nice neat containers. For my 2 L3 attempts I’ve used them – worked great at 20k and 25k to…   Read more»

I’m pistons all the way. Never had one jam or fail. Just make sure you ground test!Edward

I’ll be attempting my L3 for the 3rd time. Same motor, slightly shorter rocket. It has gotten about 9″ shorter since my first attempt at MHM, then got shorter again in July. I think it is about 108″ long, 3…   Read more»

I’ll throw my hat in the ring…just brazed the fins to the fincan….next…packing 10 pounds of recovery gear into a 5 pound bag.

Yes! I tested them at 3 different KN values. I got an ‘a’ number of .305 and a ‘n’ number of .01 .I used potassium nitrate that I got from a co-op. These number were obtained with non-milled potassium nitrate….   Read more»

My stand has the motor pointing down as I test hybrids, but it isn’t hard to switch around. I used a piece of 1010 rail as the mount with a hinge system on a 1″ C aluminum channel to pipe…   Read more»

If you don’t want to invest the money I’ve got a stand I’ve let members in the club use. Records thrust and pressure at 10kHz. One stand is 6″ motor capable to 5000lbs thrust.Edward

I’ve used a lathe as an arbor press before to get a tube off of a mandrel. I set the chuck to hold the mandrel then backed it off ever so slightly. I then put a live center in the…   Read more»

If you join NCR (Northern Colorado Rocketry) it is an independent club and that membership allows you to fly at their events. They also require that if you fly high power you be a member of either NAR or Tripoli…   Read more»

I’ll be there….love Hartsel. Great place to fly. I’ll have a bunch of hybrids to fly both days.Edward

The Astro is a great unit. John Wilke told me to use one in my first L3 attempt and because I didn’t I ended up storing my rocket on the prairie and logging a 19 mile one day hike to…   Read more»

So for now I’ve got this:2 48″ parachutes1 72″ parachute.As for colors I’m going to start with the neon green and purple combination unless you want white in there.Edward

E-mail me atedward (AT) alphahybrids (DOT) comEdward

The workmanship is top notch. All pieces are cut with a hot knife to prevent fraying. The seams between panels are double roll hemmed to leave no raw edge exposed. Both the bottom and top edges are enclosed in 1/2″…   Read more»

The shroud lines are about 1.25 the diameter. When I was testing these to determine Cd I found no difference between 1.25 and nearly 3 times the diameter in the Cd values.They pack very well, I can get my 48″…   Read more»

Even using 4FFFF this method is the only way to go. Easy, efficient and reliable. I’ve used it over 25K and it works great. It also works under 1k //www.wimpyrockets.com/page16.htmlEdward

You should really try the surgical tubing method. It beats everything out there. Easy of setup, ease of use – no worry about compacting the powder, holding it in a container, making sure the e-match is in contact, worrying about…   Read more»

Adrian’s screw switches are great. I use them almost exclusively. As for the ejection charge I’d use a setup such as this//tinyurl.com/mq9amxEdward

AWESOME work! Love how blue the sky was….absolutely perfect. Now I just need you to convert to the dark side….(Canon).Edward