Activity

If you look at my work Jacket I still have it on that.

Glad you could relate! Still peeling it off my hands…

3 DAYS!

Well, I had always used a little bit of the GLR expanding Mega-Foam at a time, but not today… was doing two things at once… looked up from working on my av-bay only to see foam foaming out of my…   Read more»

That’s why I was doing two things at once, couldn’t waste the day.

Hey at least it was a warm day to be working outside. 😀

Glad you could relate! Still peeling it off my hands…

Thanks, Bruce. Made me smile as I related to the story.

Well, I had always used a little bit of the GLR expanding Mega-Foam at a time, but not today… was doing two things at once… looked up from working on my av-bay only to see foam foaming out of my…   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

hard to predict and depends on the foam, how carefully mixed, how much space to expand. Weigh the liquid before you mix it, mix and pour. You can figure the density by figuring the total weight divided by the volume.Warren

What is the density of the foam, or through your before and after measurements, how much weight did it add tothe rocket?

Sandable filler is probably 5 to 8 times the density of foam… I’m speaking of the Elmer’s or other sandable wood filler. I’m really having a hard time visualizing what the application is. You can send me a Rocksim file…   Read more»

Warren,Having never used expanding foam before, I imagined that maybe there was a brand out there that would be useful as lightweight filler for small rocket projects. Maybe it is not lightweight at all, I don’t know. I realize that…   Read more»

A 1/4″ gap would be something I would try to resolve with epoxy or sandable filler. Foam would be great in between the airframe and the motor mount tube as a filler. If you have a visible gap in the…   Read more»

I’m looking for the right expanding foam application for my “Estes size” rocket project that has some 1/4″ gaps. -Any suggestions?-Robby

Warren,Makes sense tho I was taught never to do so for other reasons. We actually got it to work pretty well as w/o the fill tube, you can draw thru it up pretty quickly–at least in a 60cc with the…   Read more»

If you’re going to do the syringe thing, don’t draw it back into the syringe, get the syringe all set, remove the plunger and then fill the barrel directly, reinsert the plunger and go. You really don’t have the time…   Read more»

Have to get me some of the ft collins foam as this particular project and one I’ll be starting soon for LDRS involved injecting foam into 8 cavities thru a syringe to make a conical transition section–very tricky to mix,…   Read more»

I’ve gotten much better at judging foam volumes… small amount take a lot longer to cure as the stuff is exothermic like epoxy. More in one place results in greater heat, greater bubbling, greater volume. Oh yeah, newspaper on the…   Read more»

I know I’m not as experienced as anyone on this topic, but I learned my lesson real quick. The first rocket I used foam on, I did so without really testing how it would react. I tried a little bit…   Read more»