hows it going i live in new zealand and learnt rcandy motors from james yawn as well he is a very helpful man ive built his small motor and built a couple of bigger now to ive uploaded a couple from last year but well past that now gana try to get new cable for camera cause the biger one put out over 90 pound still going straight at 450meters jimmys a legend
true pouring inside a 6-inch is a pain, so i made segmented moulds. of course with core burn are(hole though out length) then stacked them inside tube.
nozzle = PVC end cover with 9mm hole filled with concrete with 7mm hole.
igniter= tel wire wound round 2 match heads inside the covered end..
result?
thrust=.9 kg,
Burntime=30secs....
heheheeh.
what do those hrdware clerks call that iron oxide based concrete dye?
So do you use pvc sch 40 for your rockets and if you do what size? 1/2"? I used sch "a" once on accident i cant believe i didnt think of it and i did a bp burn test and it cato on me. I was thinking about sch 80 but that might be overkill
so is this an end burner rocket or core burner ? sorry i got no idea about R candy rockets, I dont know if i need to make a drill into the hard candy inside the tube.
Rcandy is usually used in a core burning configuration. what you do is press a coring rod through the case while the propellant is still hot and pliable and keep twisting it unitl the propellant is cooled and hardened. I would n ot advise using a drill as it is possible that the friction from the drill bit could ignight the propellant.
use a drill, kno3/sucrose ignites at over 600C, you'll be hard pressed to generate that heat from drilling it, i do it regularly with no problems and also machine my propellant grains on a lathe at fairly high speeds.
U said 40 pvc pipe ? u mean 40mm OD right ? i got one but the tube is really wide i got nothing as a replacement for the rod to ram the propellant,. I used 20mm OD pvc pipe as a tube with 16mm ID, but that tube will melt everytime it burns..
no sch 40 is the thickness of the wall. It is the thick walled pvc pipe. Also this motor is burning sugar syrup propellant. Similar to recrystallized, not dry mixed.
R candy., I hate pouring hot fuel inside a narrow tube, and im also scare to touch the hot R-candy. i was trying to roll it by my hand so i can insert the propellant nicely into the tube. is there any better way to do ? and is that a end burner rocket or core burner ?
Generally, Rcandy requires a core burning configuration to burn fast enough to produce thrust. Really there is no way around handling it. When it is cooled slightly, but still pliable, then press it into the casing and then push your coring rod all the way through the propellant grain.
well, the steel nozzle is definitely more efficient but the problem is making one. bentonite clay nozzles has the advantage of being extremely easy to make as it only takes 30 seconds or so to make one. This piticular motor burned a single uninhibited propellant grain for an ISP of 112 puts it in the G range if I'm not mistaken.
Yes with low impulse propellants like rcandy, you can use copper as long as the burn time isn't too long. The best way to make one is to go to a machine shop and have them cnc one out of steel. What you can do though is make a bentonite clay nozzle but make it much thicker than you would normally, the carve out a funnel with a knife or a pair of scissors then finish it off and makei ti really smooth with a dremal tool. That's the easiest way to make a de-leval nozzle
yh,,, how thick was the pipe you used because i have got a .8mm pipe that i have formed into a nozzle but i am not sure if it is too wide. I am using a 1 1/4 inch pvc pipe. Do you think that is to wide? thatnks for you help!!
use sch 40 pvc pipe. It is the thick walled pipe. Use that and you'll be fine. I make motors out of it all the time. The tin walled pipe will not hold up to the pressure.
1 1/4 inch sch 40 pvc pipe and steal nozzle. The end caps are glued on and the grain wrapped in a paper liner to serve some protection from the heat. You don't have to use a liner but the heat will soften the pvc after firing and you can't reload the case.
hows it going i live in new zealand and learnt rcandy motors from james yawn as well he is a very helpful man ive built his small motor and built a couple of bigger now to ive uploaded a couple from last year but well past that now gana try to get new cable for camera cause the biger one put out over 90 pound still going straight at 450meters jimmys a legend
stokemorecones 1 year ago
i tried a 1.5 inch rocket build..
true pouring inside a 6-inch is a pain, so i made segmented moulds. of course with core burn are(hole though out length) then stacked them inside tube.
nozzle = PVC end cover with 9mm hole filled with concrete with 7mm hole.
igniter= tel wire wound round 2 match heads inside the covered end..
result?
thrust=.9 kg,
Burntime=30secs....
heheheeh.
what do those hrdware clerks call that iron oxide based concrete dye?
nakazatoGTR 3 years ago
man that is powerful - how did you make it
thepyrokid288 3 years ago
So do you use pvc sch 40 for your rockets and if you do what size? 1/2"? I used sch "a" once on accident i cant believe i didnt think of it and i did a bp burn test and it cato on me. I was thinking about sch 80 but that might be overkill
TheUnforgivn17 3 years ago
where did you get that nozzle i have been looking everywhere for one
trekridr42 3 years ago
so is this an end burner rocket or core burner ? sorry i got no idea about R candy rockets, I dont know if i need to make a drill into the hard candy inside the tube.
vess25 3 years ago
Rcandy is usually used in a core burning configuration. what you do is press a coring rod through the case while the propellant is still hot and pliable and keep twisting it unitl the propellant is cooled and hardened. I would n ot advise using a drill as it is possible that the friction from the drill bit could ignight the propellant.
airgunsniper 3 years ago
use a drill, kno3/sucrose ignites at over 600C, you'll be hard pressed to generate that heat from drilling it, i do it regularly with no problems and also machine my propellant grains on a lathe at fairly high speeds.
it's safe.
davef21370 3 years ago
Oh ya.. what do u mean sch 40 ? would you tell me what is the thickness in (mm) ?
vess25 3 years ago
The wall thickness varies with the diameter of the pipe. It is the thick walled high pressure pvc pipe.
airgunsniper 3 years ago
U said 40 pvc pipe ? u mean 40mm OD right ? i got one but the tube is really wide i got nothing as a replacement for the rod to ram the propellant,. I used 20mm OD pvc pipe as a tube with 16mm ID, but that tube will melt everytime it burns..
vess25 3 years ago
no sch 40 is the thickness of the wall. It is the thick walled pvc pipe. Also this motor is burning sugar syrup propellant. Similar to recrystallized, not dry mixed.
airgunsniper 3 years ago
R candy., I hate pouring hot fuel inside a narrow tube, and im also scare to touch the hot R-candy. i was trying to roll it by my hand so i can insert the propellant nicely into the tube. is there any better way to do ? and is that a end burner rocket or core burner ?
vess25 3 years ago
Generally, Rcandy requires a core burning configuration to burn fast enough to produce thrust. Really there is no way around handling it. When it is cooled slightly, but still pliable, then press it into the casing and then push your coring rod all the way through the propellant grain.
airgunsniper 3 years ago
this is from james yawn's site
deltakid99 3 years ago
kwl, what did you use for the nossle?
alphadeltaforce 4 years ago
the nozzle was a steel de-leval type nozzle. Most of the time though, I just use bentonite clay.
airgunsniper 4 years ago
what would you say is better, having the tube or clay? Also, what class would you say that motor was? thanks
alphadeltaforce 4 years ago
well, the steel nozzle is definitely more efficient but the problem is making one. bentonite clay nozzles has the advantage of being extremely easy to make as it only takes 30 seconds or so to make one. This piticular motor burned a single uninhibited propellant grain for an ISP of 112 puts it in the G range if I'm not mistaken.
airgunsniper 4 years ago
thanks, could you use something like copper. Its softer that steel? How did you actualy get it into the nozzle shape at the end?? Thanks again!!
alphadeltaforce 4 years ago
Yes with low impulse propellants like rcandy, you can use copper as long as the burn time isn't too long. The best way to make one is to go to a machine shop and have them cnc one out of steel. What you can do though is make a bentonite clay nozzle but make it much thicker than you would normally, the carve out a funnel with a knife or a pair of scissors then finish it off and makei ti really smooth with a dremal tool. That's the easiest way to make a de-leval nozzle
airgunsniper 4 years ago
yh,,, how thick was the pipe you used because i have got a .8mm pipe that i have formed into a nozzle but i am not sure if it is too wide. I am using a 1 1/4 inch pvc pipe. Do you think that is to wide? thatnks for you help!!
alphadeltaforce 4 years ago
use sch 40 pvc pipe. It is the thick walled pipe. Use that and you'll be fine. I make motors out of it all the time. The tin walled pipe will not hold up to the pressure.
airgunsniper 4 years ago
ok, for the nozzel i have a 8mm in diameter pipe, would that be to wide for a 1.5 inch motor pipe,,,
alphadeltaforce 4 years ago
ok, for the nozzel i have a 8mm in diameter pipe, would that be to wide for a 1.5 inch motor pipe,,,
alphadeltaforce 4 years ago
!Fantastic video!, informative blurb to .Keep up good work !!
fishcake1235 4 years ago
1 1/4 inch sch 40 pvc pipe and steal nozzle. The end caps are glued on and the grain wrapped in a paper liner to serve some protection from the heat. You don't have to use a liner but the heat will soften the pvc after firing and you can't reload the case.
airgunsniper 4 years ago