Search results

Thanks for the post! I hope you like the product - we've been flying them for a long time and they work great! Fly High!

Have you thought of making a Z-Pard type device? It is an aluminum piston that houses black powder in one end and then is connected between your e-bay and nosecone. Because you don't have to pressurized the entire bay a little bit of BP can generate quite the force. The downside is extra...

I use surgical tubing charges. Wells are just extra weight. Tape the tubes to the bulkhead and then pack with some dog barf and then nomex chute protector. I've used them exclusively. The BP is in contact with the e-match and won't move around. Edward

For something that large and not wanting to pressurize the entire thing I would use a Z-Pard. Basically a double sleeved aluminum piston powered by BP. You can try and locate the free article that was in Rockets magazine by Rick V. I've used a version that uses a two pieces of nested tubing...

I'd hope you could get more than 11K out of the K250... Back when someone was going for the I records with SRS equipment I remember them filling and dumping the tank a couple of times to chill the nitrous down and increase the dIsp. Hybrid records are a bit of a misnomer, because you really...

Thank you for that! I keep forgetting. I'll have to contact you soon about doing a Rocketry Nut/Harness Combination. Edward

Skyripper, RATTWorks, ProPolymers and Contrail in my opinion are the same level of complexity. All are U/C that you fill and then fire. Hypertek is another level of complexity. Edward

We are currently running a special on Rocketry Nut anchors. Just got back from machining another 250 of them. For the rest of January you can get 10 Rocketry Nuts for $60. We also have updated our Cable Cutters to include a Deluxe package that has 100 o-rings and 100 cable ties instead of the...

All, After looking through my past orders I am thinking of changing the basic 2-pack to include 100 o-rings and 100 cable ties. This is 80 more of each than currently. The price would go from $50 to $60. Any comments? I may just add it as an option, and people can still order the...

I can post the 3D models that I made the part from soon. The thing that appeals to me more about this guide is that two guides provide guide holes for 1,2,3,4,6 or 8 radially drilled holes on 38mm, 54mm, 64mm 75mm, 98mm 5.5", 6" and 7.5" airframes. Much more versatile than having a jig for...

I've decided to tackle this problem from another direction. For 2,4 or 8 holes I've come up with a piece of angle. It is 6-inches long and the legs are 4x4. 1-inch from one end are spaced holes for drilling perpendicular for various diameters. Both legs are the same. This way you can drill...

Everyone stopped and watched a K motor flight...

I had a price quote on this, but I'm still not convinced this is the best way to do this. It requires a specialized tool for each diameter. I could sell them for ~$40 each. That is a large investment for something like this. I'm really not sure if it is worth it - my minimum to get this...

Come to Colorado. Thin air :) One launch site with a 20K waiver is ~5,300 elevation and the other site which only has a 14,200' waiver sits at an elevation of 8,800'. Edward

Here is the link to where I have purchased my 3/8" cord. Great stuff. https://www.missileworks.com/store/#!/3-8-Tubular-Kevlar/p/24591357/category=5760496 Edward

WOW! That was fast! I made 100 rocketry nuts for the pre-order and I only have 2 left after I added them to my website. I'm going to make another 100 and we will see how long those last. Thank you for the support and fly high! Edward

I tested these 5 or 6 years ago with Doc @ Rocket Materials. Same design. We used 3/8 tubular kevlar cords to test and every time we tested we snapped the kevlar cord and the nut wasn't damaged. I've flown them on all my rockets up to 25-30 pounds and never have had issues. I don't know what...

Have you thought of using an EPDM liner? They work great and are easy to fabricate. Edward

Doh! I believe I fixed it - please let me know of it doesn't work. Edward

The Rocketry Nut is now available at our store: https://ptrocketry.blogspot.com/p/store_28.html Edward