Doug Gerrard

constevens, do you do mail order? I’ve been using House of Kolor paints and just getting them on line.Doug

I don’t know Warren, we spend how many hundreds of dollars building and flying rockets? A couple of extra bucks to make the job easier sounds reasonable to me.Doug

Another material I have used besides cardboard is foam board. You can get it 20″ x 30″ in many arts and craft stores and sometimes as large as 30″ x 40″ in office supply stores. It is very rigid. I…   Read more»

What is the density of the foam

Expanding foam usually comes in 2 lbs/cubic ft to 16 lbs/cubic ft depending on what you buy.Doug

I like the booster seperation. Looks like it worked out well. I made several changes because of that and even a second test. That video you see is too “violent” and it blows them off “tail” first. Its suppose to…   Read more»

Looks like Freeze Frame is a go, probably… The rocket is finished and you can check out the paint job at http://www.rocketryphotography.com/rockets/RocketsFreezeframe.html if you like.I still have a few issues to work out but if everythng falls into place I…   Read more»

I know its not like to cool video you do but its a start…technically its not video.5 pounds each? And I was worried about my whole rocket aft end being 10 pounds! Your camera must be heavy enough to keep…   Read more»

Yes, but in slow motion they are staggered very slightly. It took 5 frames from first to last at 400 frames per second so about 12 msec but i’m not complaining. Hell, I’m happy if they come off period. I…   Read more»

OK it appears to be working on my site. I went home at lunch for a quick update. It is near the bottom of Freeze Frame page http://www.rocketryphotography.com/rockets/RocketsFreezeframe.html and once you click on the thumbnail it goes to the video….   Read more»

It’s going well, everything is on track. I tested the dropping the booster and video taped it but the link doesn’t seem to work. Once it gets repaired I’ll post it here. I nearly finished with the cowling for the…   Read more»

Warren,I personally like the idea of a projects page but I’m not in favor of the kind the LDRS pages are based on. Maybe just a page with a single photo and description.Doug

Wal-mart carries something like what you’re talking about. I think they called it a “sports camera” for mounting on the side of your helmet. A guy flew it strapped on to a 2.6″ G motor rocket and it lasted one…   Read more»

I really, really, want to finish Freeze Frame by October. The M1419 has been calling my name. Freeze Frame is still under construction as well as the web page but some photos can be found at http://www.rocketryphotography.com/rockets/RocketsFreezeframe.htmlIt is a 6″…   Read more»

BSchaefer.I have had OK success widening slots in fiberglass tubing by using a Diamond bit in a Dremel tube and “free-handing” the cut. However, it won’t be perfect. You can’t get the bits from Harbor Freight. I would be happy…   Read more»

If you, or anyone, is interested I’ll offer one of my cameras to go in your rocket. (They love a free ride…). If you want the high speed movie camera or stills, but I don’t do video or even DV….   Read more»

Sounds very nice Warren, but which camera are you going to use in your payload? Doug

I use this calculator, too. I’m using 6-32’s for my nose cone holding the main… the calculator goes only to 4-40’s, so I’m taking a shot for 6-32’s doubling what blasts (4) 4-40’s. Does that sound right?My experience with the…   Read more»

There is an excellent site at ROL http://info-central.org/recovery_powder.shtml that discusses black powder charges and how to calculate them. My gut instinct is that the 1.5 grams with the motor will be fine. For my 6″, 24″ chute compartment and using…   Read more»

Are you talking about for altitude or duration? Also, why limited it to those motors? I propose H Dual eggloft altitude by altimeter. Eggs must be returned unbroken but any combination of certified motors up to 320N-sec.I’m interested as long…   Read more»

I like the idea too but for Oktoberfest. What about launching a dozen eggs launched before 9:00? I figured losser has to fix breakfest.Doug