Advice About Disposable Wadding Alternatives in LPRs

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beeblebrox

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Dog barf is biodegradable. It’s totally fine to use.
I know that, but it does fluff out and not make a good seal, and golf courses don't want that stuff coming down that's all...hence the piston. We use dog barf for all the kids rockets at MDRA no problem with that stuff being used...People used to use fiberglass insulation, that is not bio-degradable...
 

BigMacDaddy

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How do the bigger sheets of wadding from Estes compare to the normal stuff in the BP Motor packs? I bought a random over-priced lot of rockets and it came with a bunch of the wadding (picture below). Seems a bit thicker and sheets are definitely larger. I have been using a mix of dog barf and the little wadding sheets recently...

1652008719278.jpeg
 

lakeroadster

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How do the bigger sheets of wadding from Estes compare to the normal stuff in the BP Motor packs? I bought a random over-priced lot of rockets and it came with a bunch of the wadding (picture below). Seems a bit thicker and sheets are definitely larger. I have been using a mix of dog barf and the little wadding sheets recently...

View attachment 517609
Maybe do a test and see how flammable that is? Does it say what it's made out of?
 

rharshberger

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I've had good success with a layer cake approach on some larger rockets. Square of wadding, barf, wadding, barf, wadding...
I do a similar technique, a single sheet of Estes or Quest wadding formed into a cup shape then that is filled with dogbarf and the whole thing pushed into the airframe with a dowel. Many time the wadding sheet is easily recovered and reused.
 

Daddyisabar

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How do the bigger sheets of wadding from Estes compare to the normal stuff in the BP Motor packs? I bought a random over-priced lot of rockets and it came with a bunch of the wadding (picture below). Seems a bit thicker and sheets are definitely larger. I have been using a mix of dog barf and the little wadding sheets recently...

View attachment 517609
I have found the quality of Estes wadding has varied over time and suppliers. From the nice old stuff pictured above to some newer stuff that was horrible, TP like that would burn on the way down or on a test. Have not purchased the stuff in years. Dog barf, deco puffs and wilted lettuce rule. Real envy of the rich guys with their fancy pants nomex blankies, sophisticated baffles, piston CO2 ejection, or awesome helicopter recovery. :)

I do have a few sheets from my very first wadding pack back in '74 that I keep in my case for good luck and to appease the rocket gods.
 

bjphoenix

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I was cutting up a paper towel today to see how easily it could be made into a chute protector and it seemed like it would work pretty well. I always thought the weak point in these was at the 4 spots on the bottom where the slots end and there is no overlap. Originally I thought the thing to do would be to use 2 of the protectors stacked with one of them rotated 45 degrees so there would be double layers, but messing with one today I thought it would work pretty well just to lay one square of wadding on top of the chute protector before folding it. Now, how easy is it to make a piece of paper towel fire resistant? and is homemade treatment as effective as the wadding that you buy?
 

Jerry F.

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One of the guys in my area makes a homemade fire retardant of some sort, applies it to a piece of used denim...its capable of withstanding a sustained blast from a blow torch...so it should be possible to do something similar...
 

rharshberger

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One of the guys in my area makes a homemade fire retardant of some sort, applies it to a piece of used denim...its capable of withstanding a sustained blast from a blow torch...so it should be possible to do something similar...
Probably Borax and Boric acid (roach killer), dissolved in boiling water to get a high saturation solution, the denim is then soaked in the solution, then allowed to air dry. Its a really common, easy to make, and it works.
 

mh9162013

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Now, how easy is it to make a piece of paper towel fire resistant? and is homemade treatment as effective as the wadding that you buy?

From my research online, dissolving baking soda in water, then soaking a peice of paper towel in the solution and letting it air dry seems to work well as disposable wadding. But it's an ongoing cost and takes time to make. The only advantage I see it having over dog barf is that it's not as messy (to use). But it still poses the potential problem of being litter and is an ongoing cost. Whatever works for you, though.
 

Sooner Boomer

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One of the guys in my area makes a homemade fire retardant of some sort, applies it to a piece of used denim...its capable of withstanding a sustained blast from a blow torch...so it should be possible to do something similar...

 

prfesser

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View attachment 517383
I'm coo-coo for Decopuffs! Same thing as Quest wadding only in many colors. 300 sheets lasts long time for LPR. Bulk packs for use on parade floats.
This is an outstanding idea! I've never heard of this stuff but it must be a stouter tissue than boric acid/borax soaked toilet paper, since it's used to make floats. Neater to use than dog barf. Believe I'll go buy a few dozen packs for our prefecture.

Best -- Terry
 

Lee

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They dont last forever, most rockets however dont survive long enough for them to wear out. Just like a nomex a baffle is damaged a small amount every time the ejection charge goes off, eventually nomex's wear out/burn through, eventually baffles wear out too.
A coat of fire retardant paint should add some lifespan?
 

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Someone brought up the teflon tape pompoms but these aren't large enough for my usual BT60 diameter rockets. Then I had the idea that I could build a pompom out of treated crepe paper streamer material. I'm going to try it when I get more interest. I think I could build one and then trim it down until it fits just right.
 

Sooner Boomer

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Someone brought up the teflon tape pompoms but these aren't large enough for my usual BT60 diameter rockets. Then I had the idea that I could build a pompom out of treated crepe paper streamer material. I'm going to try it when I get more interest. I think I could build one and then trim it down until it fits just right.

If you build one from crepe paper, make it easily replacable. "flameproof" crepe paper will not continue burning (support combustion), but it *will* scorch if exposed to ejection charges.
 

bjphoenix

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Here is my first pompon. It has 2 launches on it in BT60 rockets and seemed to work well. This is 4 strips of streamer material, 12" long each. I stacked them, tied a piece of elastic around the middle, and then crumpled them to make them puff up more in the tube. I tied a loop in the elastic to attach to the shock cord. I typically use shock cords with swivels each end so when I prep the rocket I run the shock cord through the loop. I move the shock cords and this protector from rocket to rocket.
IMG_4837c.jpg
 

mh9162013

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Update:

I built a BT-50 rocket with a homemade baffle using the "three half-moon" design that's similar to what's sold by Apogee. I made it with a bamboo skewer, cardboard and JB weld. It worked perfectly in the one test I ran with it. I'll do more testing to confirm it's longevity. I put 1 piece of disposable wadding (Estes) right after the baffle to see what it would look like and it looked like this:

20220620_173645.jpg

So I'll be using this with a piece of reusable wadding, probably made out of denim.

Why denim? Well, I also tested 3x3 inch Dino Chutes reusable wadding in a different rocket, but after 3-4 launches (A type BP motors), it had a small hole. After 8 launches, it had 2 holes, one of them being large enough to render the reusable wadding almost useless. So if commercial reusable wadding will only last a handful of launches, I'll make my own (for free) that'll last about the same amount of time.

But what do I do for rockets that can't use baffles? Still working on that challenge.
 
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