Activity

I use a these – circle cutters in a drill press//www.amazon.com/General-Tools-55-Circle-Cutter/dp/B00004T7P1I’ve cut up to the limit of my circle cutter (8″) with no problems. I have one permanently set for ID cuts and one for OD cuts. I also have…   Read more»

I have a router, table and a cumpas set up. Have not used it forcentering rings. I still just cut them out with my Dremel Jig Sawand sand to fit.My Dad gave Me the Router and attachments So I would…   Read more»

Lots of great ways to make centering rings. The real question is what size are you thinking about. I have a plunge router and Jasper Circle jig that is great for larger rings – i.e larger than 4″. These things…   Read more»

Scott (or anyone else who is looking for a K350) -I have a spare K350 I’d part with if Jon is out of inventory – I won’t use mine until much later in the year….

ThanksNow I can get my Skuba snack.

303-817-5303Usually goes to answerin machine but he is good at getting back to you.

Motor ejection of the drogue can often do more harm than good… Altimeters like Adrian’s (and others) are so reliable that you don’t have to worry about motor ejection. If / when you use it, the darned motor always seems…   Read more»

8) Skip the drough chute. Too much trouble for to little gain. Pop it and just let her fall. Glass rockets are way tough. The main will do the work. IMHO

I’m still considering using the motor as a back up, but only for some engines.I am going to watch all the Little Dog DD launches closely.I am going to attempt one with a J-600. The time going up exceeds the…   Read more»

If you’re using altimeter apogee deployment, you don’t have to drill anything out; just leave the delay/smoke in place and just skip the step where you add the BP. If you want to eliminate the possible failure mode of a…   Read more»

Also, if you are not a member of NAR or TRA, at a NAR launch you are covered and as a participant but at a TRA launch if you are not a member of TRA you are not covered under…   Read more»

Don’t forget, there’s also TRA (Tripoli Rocketry Assn.) as another national organization.TRA vs. NAR is a choice you can make, based upon where you’d like to go in rocketry. NAR is excellent for competition, low and mid power, and supports…   Read more»

NCR is a local club, having its own membership fees. It is not required to join to fly but is a good idea to help support the club, and equipment. It is also not required to join NAR but joining…   Read more»

Hey, Adrian is NCR, whatta ya expect? I’m almost ready to order one myself. State-of-the art!

I always go on the long side for mach delay. I always set it to at least the length of the motor burn, plus a couple more seconds on a slow rocket. On a fast (near-mach) rocket, I’ll usually set…   Read more»

Thanks guys.I’m going to err on the side of caution from now on. I don’t think my delay was long enough on the VA flight and it deployed right at burnout. I’d have to go look at the alts again…   Read more»

I too use a mach delay, although I tend to compute the length based on the simulated time above mach plus about 4 seconds. I don’t think I’ve had one longer than 18 seconds, but I’m not sure. I use…   Read more»

I thought John was crazy when he suggested I use a 25 second mach delay for my L3. Turns out that it worked perfectly.As for shear pins, I generally use them on all my rockets – 2-56 is my standard….   Read more»

I agree with Edward. I use mach delays all the time, even on sub-mach flights. On a lot of my minimum diameter stuff that has high velocity I’ll set them to 25 seconds. The first time I did that, I…   Read more»

I set the Mach delay for rockets going better than 200 mph. I use the time the sim says until the rocket has decelerated to ~.5 Mach. This can be quite long sometimes. I do not trust Rocksim – I…   Read more»