edward

From what I’ve seen and heard, it works quite well. I really like the idea. I’m going to get one for when I fly with T-C and NCR on commercial days. Relatively speaking, it takes quite a bit of venting…   Read more»

From Rocket Materials 4 x #4 screws has an average of 152 lbs before they sheared. I’m looking up nylon in one of my books and will have some math later.Edward

All of these Coefficients of friction are dry interfaces on aluminum.Aluminum – Static 1.05-1.35, Sliding 1.4Steel – Static .67 Slidng .47Carbon fiber epoxy – Sliding .23 to .68 (gets worse over time)Self-lubricating Plastic on T-Slot – Static .1.8-2.2 Sliding .16Self-lubricating…   Read more»

You’d think if it were as bad as CFC’s they’d ban them. They still sell it in up to 55 gallon barrels :)Edward

Have you ever tried Brakleen? The chlorinated stuff works *way* better. I’ve fired a motor, let it sit in the sun for 2 months, then cleaned it with that and it is as shiny as new.Edward

I buy my eyenuts from CD Fasteners in Fort Collins. I think when I bought some 3/8″ ones they were $6 apiece. I’m betting most of the time the harness fails before the eyenut.Edward

You can go tohttp://www.smalley.com/They have tables for the force it would take for the ring to fail.A quick lookup shows that a similar ring to the one on AMW cases the ring fails at 12930lbs with a safety factor of…   Read more»

Here is what I’m going to fly for MHM. It is a 2.56 rocket with a 26″ 54mm motor mount. It will be fed a diet of nitrous 🙂 I’m planning on flying SRS 38’s, 54’s and then Sunday as…   Read more»

There is a site that says it is the better way because of stability but I believe Doug G. says it is bunk (I can’t confirm/deny if it is, but I’ll go with Doug). It works for me mainly because…   Read more»

I always put the piston right against the charge. They travel just fine when you keep it clean. What airframe material is used. I also have my piston sitting in my rocket so that it looks like a drinking glass…   Read more»

The way on the bottom is actually the correct method. The other method results in an unstable piston.http://www.deltavrocketry.com/piston.htmEdward

Personally I wouldn’t put my electronics in a piston and still use it as a piston. Just the thought of shooting it out of the rocket and all the jostling doesn’t seem that great. Just my opinion. Also – are…   Read more»

So you have .588 in^2 as your area that you need in holes. So now you wanted 6 holes around the airframe. This would be .588 in^2 /6 or .098 in^2 for each hole. A = pi*r^2 so r =…   Read more»

Yes, I do – this weekend. What connector does the GSE have to a tank? I can bring a small 20lb tank that would be warm enough , just need to get the right connector to it.Edward

These hybrids are mainly aimed at the people who have invested in the Hypertek system and want another option to fly. The basic Hypertek setup was a tank that connected to a plastic disposable fuel grain. The Trojan setup you…   Read more»

I’d use a regular e-match to light the motor. If you look you’ll see the supplied igniter is just a resistor that needs 24v to heat up and get the motor going. Swap that out for an e-match and then…   Read more»

Bass Pro has some. Just have to ask at the desk.Edward

They aren’t going out of business – I talk to Nick and they are just trying to lighten the inventory a little.Edward

I use the surgical tubing method. I just wrap the wires around my eyenut and put the charge in the eye of the eyenut. That way it doesn’t move around a whole lot or get pushed to one side. Always…   Read more»

Yes, you can send the A2 up again. Paper or Plastic?Edward