edward

The club has some GSE – but lately I’ve been bringing my own hoses and valves because the solenoid works, but can be hit or miss.Edward

I’ll just throw my ideas out there – I hope to be more involved in the re-build if I have the time.I’ve talked to James but wondered if there was a way to do a pull pin ignition of the…   Read more»

Even though the fire ban is lifted – it is still very very dry out there. Dead grass just doesn’t green up.Edward

I was in the area this morning – about 8am. We had some good rain there last night. Was damp at 8am. By the time we left at 11am the roads were dry and you could hardly tell it rained…   Read more»

I never use swivels in my recovery gear. Your rocket is able to rotate free in the air and a swivel is another point of failure. Loctite and a lockwasher are all you should need.Edward

Going to a mix session is a great way to gain information, even if all you to is stand around. Group builds (like the Proton) are also a great opportunity.Edward

I tinker in the research world. I’ve done APCP but mainly concentrate on hybrids now. I’m in Fort Collins. As with James, e-mail is the best way to contact me.edwardcw AT gmail DOT comEdward

What are the weights of the components you are restraining? On my 2.5″ diameter L3 rocket I had to step it up to 6-32 shear pins to keep the nose from deploying when I separated the rocket. I’d start with…   Read more»

That one is a 96″ chute toroidal profile. Let D1’s L3 down nice and easy. I make about 10 a year for people – not a whole lot but keeps me busy.I actually have a 60″ you can try if…   Read more»

Sorry, I didn’t read the 20-25 fps. That’s screaming in! At 20 fps I get a 48″ parachute with a 17.5 pound recovery weight and recovering at the North Site – 5500′. A 60″ parachute gives you 16 fps and…   Read more»

What descent rate do you want? I generally go for a 10-12 fps because I like landing soft, especially on our prairie. I make a torodial chute that does very well for the size. On my L3 I used a…   Read more»

Mike,I have a 96″ toroidal chute that DaveH used on his L3. Less than 15fps if you want to use it.Edward

We got .31″ here in Fort Collins. Looking at a couple sites the North Site got about .03″.:(Edward

ALRECO has plenty of hockey pucks for forward closures. Graphite is hard to source locally. I get it from NAC Carbon.Edward

You don’t need DOA in your propellant. It just makes it mix better and you get a softer cure. Here is something I ran a while back:79% AP 200u1% Mg13% HTPB2% PAPI5% DOA1 drop silicone oil per 500 grams as…   Read more»

Yes, it is in an ammo can. You have to bring your own fittings to your motors. The club does not have nitrous.Edward

The 3 Dogs Rocketry Eye Nut Anchors are also a superb choice. I use those for my L3.http://www.rocketryplanet.com/content/view/3708/29/#axzz1oAUQIVfUEdward

CD Fasteners has 1/4″-20 eye nuts in stock. I’ve bought all of mine from them. They aren’t stainless but should be more than sufficient enough for rocketry use.Edward

If a pound of lead and steel are going the same speed, the energy is the same. The lead will just take up a smaller volume. I guess you could stay potential energy density is higher.Edward

Which hits harder – a pound of lead or a pound of steel?Edward