Doug Gerrard

Sure Ron, but you can also go with just smaller diameter all thread. You could try 6-32 or even 4-40 for an electronics bay.Doug

IIRC the J1500 was a Kosdon East creation?

I got mine directly from Frank in CA several years ago.Doug

OK,OK, my apologies, the casing is only 29 inches long. Sorry, the memory isn’t what it use to be. Here is a couple of shots of it:The offer still stands, if anyone wants to build a EX motor for it,…   Read more»

Do you have nozzles / closures?Yes. It was designed for the all carbon rocket from Shadow Composites. I don’t know if James or anyone else could build the grains but you’re welcome to borrow it. It tests a rockets integrity…   Read more»

The case was for a J1500, 1500 Ns and a burn time of 1 second!Doug

I have a Kosden case over 39 inches long 8ODoug

I swear that was the guy who bit me last summer…..

Here’s a very short video. The flight took only 5 secs. You can increment it frame by frame and see what was happening.Its hard to tell from the video if its a stability problem or just the off axis thrust….   Read more»

What happened on Mike’s rocket? It looks like one or more motors is/are burning on the ground next to the pad. And is that I see Joe putting a rocket on a rod? What’s going on here….?Doug

Should a chute of this size be better off with a deployment bag?No. I’ve tried several different deployment bags and my recommendation is, don’t use them. I use piston’s and if I want to wrap the chute I use a…   Read more»

Since I don’t live in a vast Metropolis, I have to rely on mail order and I prefer The Composite Store http://www.cstsales.com/ Good people and fast service and delivery, even with Ground Shipping.Doug

I have flown a New Mexico Flag and Art flies his Colorado and US Flag’s so it shouldn’t be a problem. We typically fly ours about 12 to 15 feet off the ground but I think it would be cool…   Read more»

Joe,I like the idea of a group photo as long as the time is announced in advance. And Saturday afternoon is a good time. If the time and location are known in advanced, I would be happy to set up…   Read more»

I have a section of 4 inch OD and 3.75 inch ID clear tubing 12 inches long you can check out at MHM if you like.Doug

I believe it was started more as a means to roughly track what was being consumed on NCR’s launch sites and not really as a contestIt may have not have started as a contest, but it is a contest with…   Read more»

The AP bonfire has ALWAYS been an automatically computed result from the input of the flight cards. If it requires anything manual beyond entering the flight card data and occasionally updating the motor database, I’m afraid that contest is over….   Read more»

Not sure why we need to worry about the code if people just put the total weight of the propellant(s) on the flight card with the flight.Hell, just send it in after the launch. It doesn’t even have to be…   Read more»

Well Joe, I have to say I am once again disappointed with the Contests of NCR. The contest states:The club member who burns the most weight in Ammonium Perchlorate Composite Propellent according to the club launch logs from club sanctioned…   Read more»

AP Bonfire results are automatically tabulated from the launch logs and totalled from the motor database.The only logical way to do the AP bonfire is to have the fliers put down on their flight card what the motor’s total impulse…   Read more»

Well there’s no point in discussing this anymore with someone that is 100% convinced. But for the rest of you, remember those assumptions that are used to calculate the Center of Pressure? I looked them over last night and I…   Read more»