Neil
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- May 10, 2011
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Well, I gone and done it again... I was playing with rsim... All my threads seem to start like that nowadays... So I thought it'd be kewl to call a rocket "Thunder Bird". So my first thought was: This has GOT to be a biggun'. it started out 7.5" with LOC tubing, but since I cant afford a nosecone from LOC, I would have to make the nosecone less than 40" cause thats as big as the late we want to get can hold... So it went down to 6"... I REALLY cant afford a PML fiberglass cone, but, I can make one on the lathe, so big whoop. But... Then I got thinking... I suggested a mongo sono-rocket before, and got slammed, but, this one would only be .5" bigger than the Nike Smoke and Emerald Star (cutting out the fins for that one soon...)... So... I was wondering... Since our local hardware store carries 6" sono tubes...
What goes into making a sono tube rocket? How do you prepare a sono-tube that size? The rocket in question would require 126" of tubing. 90" for the actual body tube, the rest for couplers. It would be chopped into two 45" sections, fincan and payload. I bet I could get my arm in there to get the wax layer off. How hard is it to peel off the waxed layer of paper? And once you do peel it off, how strong is it? Does it require glassing? It would have a central 54MM motor mount and a pair of 38MMs for an extra kick. I have gotten into the habit of adding outboards to all my new rsim designs (believe me, there are many. ), just cause I like em. Makes it a bit more complicated, but hey.
So, could you take me through (step by step) how you prepare a sono tube for rocketry purposes? i have wanted to make a sono-rocket for a while now, and seing as I cant afford PML 6" tubing in THIS lifetime... I would rather spend days getting a sono-tube ready then spend months saving up to buy a PML tube...
So this would be (somewhat) a "rocket on a budget". Sono-tube body, turned foam (then glassed) nose cone, all that stuff. I already have some 54MM and 38MM tubing, and I would use quarter inch ply for the fins... Or should I use 3/8" on a rocket this size? The rocket wouldent have a very big fin-span... Just 17" (thats about 5.5" semi-span). Could I get away with .25"?
This will be a winter project if I do it... Im going to finish the Emerald Star and Nike Smoke first, of course. Cant have 3 5-6" rockets going at once... thatd be pretty confusing...
Rsims ays itll be about 18# dry... Thats pretty scary (a single J350 wont lift it over 1K... I dont want to be playing around with dual deployment and 20 pound rockets at THAT altitude)... A K1275R will get about 4K... Put a pair of J350s in the ouboards, with the K1275R, and you get 7K... I guess I dont want it going THAT high, but hey. Maybe some Hs or Is in the outboards and a K550 in the middle... Anyways, its a bit early to be thinking about that. Ill worry about the rocket later... Right now I just want to know about sono tubes.
Thanx.
What goes into making a sono tube rocket? How do you prepare a sono-tube that size? The rocket in question would require 126" of tubing. 90" for the actual body tube, the rest for couplers. It would be chopped into two 45" sections, fincan and payload. I bet I could get my arm in there to get the wax layer off. How hard is it to peel off the waxed layer of paper? And once you do peel it off, how strong is it? Does it require glassing? It would have a central 54MM motor mount and a pair of 38MMs for an extra kick. I have gotten into the habit of adding outboards to all my new rsim designs (believe me, there are many. ), just cause I like em. Makes it a bit more complicated, but hey.
So, could you take me through (step by step) how you prepare a sono tube for rocketry purposes? i have wanted to make a sono-rocket for a while now, and seing as I cant afford PML 6" tubing in THIS lifetime... I would rather spend days getting a sono-tube ready then spend months saving up to buy a PML tube...
So this would be (somewhat) a "rocket on a budget". Sono-tube body, turned foam (then glassed) nose cone, all that stuff. I already have some 54MM and 38MM tubing, and I would use quarter inch ply for the fins... Or should I use 3/8" on a rocket this size? The rocket wouldent have a very big fin-span... Just 17" (thats about 5.5" semi-span). Could I get away with .25"?
This will be a winter project if I do it... Im going to finish the Emerald Star and Nike Smoke first, of course. Cant have 3 5-6" rockets going at once... thatd be pretty confusing...
Rsims ays itll be about 18# dry... Thats pretty scary (a single J350 wont lift it over 1K... I dont want to be playing around with dual deployment and 20 pound rockets at THAT altitude)... A K1275R will get about 4K... Put a pair of J350s in the ouboards, with the K1275R, and you get 7K... I guess I dont want it going THAT high, but hey. Maybe some Hs or Is in the outboards and a K550 in the middle... Anyways, its a bit early to be thinking about that. Ill worry about the rocket later... Right now I just want to know about sono tubes.
Thanx.