Activity

It’s George Jetson’s Dog!https://buy.garmin.com/shop/shop.do?cID=209&pID=8576Ken

ok, i’ll bite. can somebody please explain what the heck you guys are talking about? i can’t tell much, but it sounds like it’s a locator and it sounds like it’s a cool toy. i may want one … !

Not only a mis-identified rocket part, but cheaper than a Big Red Bee plus receiver, FAR cheaper than an ARTS or an RDAS or any of the other made-for-the-purpose rocketry GPS units. Likely to have at least 7-10 miles range…   Read more»

Another misidentified rocket part.A fantastic idea.

I ordered two of them Saturday after I got back from the launch. Too cool an idea.Warren

Mike, Ill call you in a week or two. Got to get the taxes out the door first. Then I hope to turn my attention to rockets. Maybe by then I can have every thing mounted and ready to test….   Read more»

I’d be happy to let you be on my unit. Let me know if you want to get together before hand so the Astro 220 handheld will “identify” Hair of the dog. We can test your installation at the same…   Read more»

I typically thread the outside but not the inside. Meaning that I thread the airframe, but not the nosecone or the e-bay. This holds the screws in, but provides no clamping force. The screws stay in, but no additional friction…   Read more»

I don’t believe in Taping the holes at all. I use nylon screws and drill them as such so they push in but very tightly. In some cases you need to use something to push them in with.. say a…   Read more»

One way to avoid the clamping force is to only thread one of the tubes. Preferably the one that holds the head of the nylon bolt after shearing so that it can be removed.For the non-threaded hole just drill it…   Read more»

Thanks to all who responded on and off line. I think I will go w/ 4 ea. #4 screws. I procured some heavy polystyrene rod, but got to worrying about how things may shrink at 40,000′ MSL (it is c-c-cold…   Read more»

Here’s a link with formulae//www.roymech.co.uk/Useful_Tables/Screws/Thread_Calcs.htmlhttp://www.rocketmaterials.org has the tested (single) shear strength of nylon screws at:#2-56 @21.36-24.64#/screw#4-40 @38.21-40.30#/screw#6-32 @60.46#/screwFrom recent experience: If you want to use nylon screws as shear pins DO NOT, IN ANY WAY, tighten the…[Read more]

That sounds just about right to me Edward. I think I was seeing 48# shear per screw if torqued to the point they very slightly stretch. 42# if loose.W

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

I’m using 4 x 4-40 nylon screws for shear pins on my 5″ L3 bird. Don’t know if that means anything, but number 6 screws are at least twice as shear resistent than 4-40.W

I could not see the pic but it is Carl’s, we looked for hours when he first lost it and that is the area we were looking in. We walked in a zig zag back and forth from the road…   Read more»

Well, it looks like it definitely belongs to Carl Battles, and arrangements are in the works to get it back to him. According to the launch logs, it flew on 11/09/2002. After 5 long years on the prairie, it will…   Read more»

Ken, I talked to Carl this morning, he confirmed that the rocket he lost had an Adept and the L&L transmitter aboard. If there is any dispute on this thing, I do know that L&L has excellent records of which…   Read more»

‘Tis not mine – most of “Poetic Justice” was returned to me by Joe Hinton and I don’t use Adept altimeters. It does indeed look like Carl’s – I remember the day he flew that.JW

I’m pretty sure that Carl is the only other one in the club besides me that uses the L&L transmitter. I remember years ago (maybe 2003?) that he launched that rocket and looked for it for weeks. I’m pretty sure…   Read more»