2 layers of peel ply makes the tube rounder. It's called peel ply. I get it from Aircraft spruce. I think it's listed as porous Teflon coated release film. The mandrel is an Aerotech 98/15360 motor case. I put 2 layers of 2 mil mylar over it before I started the layup.
Aluminum would be stronger as would carbon fiber. I'm trying to show that a hand layed fiberglass rocket is capable of some extreme flights and you don't need to vacuum bag or carbon fiber. Motor expansion is an issue when used as the 'coupler'. The 2 mil mylar seems to be about the right amount of 'space' to allow everyhting to work properly.
@@mehmetekindogan1551 The mylar does keep the layup from sticking to the 'pipe' (mandrel/rocket motor) but it also adds some space . Not all rocket motor of the same "dia" class are the exact same diameter. They very some. They all get a tad larger the hotter the 'day' is...so that extra space created by that layer or 2 of mylar... allows for the slight difference in motor diameters.
@@tfish38 Thank you very much. I previously used polyester (I believe it is almost the same as mylar) however had some problems removing the fiberglass from the tube. I could move it a little (10 centimeters) but since the fiberglass tube wrapped the inner spool too tightly, it was impossible to move it further (it did not stick, just was too tight to move). The spool I wrapped the fiberglass to was made out of cardboard and had a wall thickness of almost 2 centimeters (so no deformations), thus I was able to leave it in the trunk of a car and it shrank a little with heat. Thus I was able to remove it easily. My question is, is there another easier way for removing the fiberglass from the tube? The method I use renders the inner spool unusable after one coating.
@@vertex3243 I don't think it would work. It would probably tear trying to get the cellophane off...the layed up tube. You might try a small test layup. I'd also try waxed paper of..Mylar from potato chip bags.
You could use a roller to compress the wet layers instead of using the chip brush which will distort the fabric weave with strong dragging as you do in this video.
Sorry, new iPad. Still getting used to it. As I was saying: thank you for the fiberglass sing tutorial. Since watching it I've tried to find some Teflon coated peel ply, with little success. I've found some silicone coated peel ply. I'm wondering if you've tried it for glassing tubes and what your thought about it might be? Thanks!
You won't believe this but 10 years later I using your video as my learning tool for creating fiberglass tubes for a different industry.
2 layers of peel ply makes the tube rounder. It's called peel ply. I get it from Aircraft spruce. I think it's listed as porous Teflon coated release film. The mandrel is an Aerotech 98/15360 motor case. I put 2 layers of 2 mil mylar over it before I started the layup.
Thanks for this video. It is very helpful. I was trying to reinvent the wheel until I found it.
Aluminum would be stronger as would carbon fiber. I'm trying to show that a hand layed fiberglass rocket is capable of some extreme flights and you don't need to vacuum bag or carbon fiber. Motor expansion is an issue when used as the 'coupler'. The 2 mil mylar seems to be about the right amount of 'space' to allow everyhting to work properly.
Is the mylar there to prevent the fiberglass from sticking to the pipe or does it have another purpose?
@@mehmetekindogan1551 The mylar does keep the layup from sticking to the 'pipe' (mandrel/rocket motor) but it also adds some space . Not all rocket motor of the same "dia" class are the exact same diameter. They very some. They all get a tad larger the hotter the 'day' is...so that extra space created by that layer or 2 of mylar... allows for the slight difference in motor diameters.
@@tfish38 Thank you very much. I previously used polyester (I believe it is almost the same as mylar) however had some problems removing the fiberglass from the tube. I could move it a little (10 centimeters) but since the fiberglass tube wrapped the inner spool too tightly, it was impossible to move it further (it did not stick, just was too tight to move). The spool I wrapped the fiberglass to was made out of cardboard and had a wall thickness of almost 2 centimeters (so no deformations), thus I was able to leave it in the trunk of a car and it shrank a little with heat. Thus I was able to remove it easily. My question is, is there another easier way for removing the fiberglass from the tube? The method I use renders the inner spool unusable after one coating.
if you could answer this question it would be great. Mylar
is a bit expensive for me , so could i use a cellophane sheet instead?
@@vertex3243 I don't think it would work. It would probably tear trying to get the cellophane off...the layed up tube. You might try a small test layup. I'd also try waxed paper of..Mylar from potato chip bags.
You could use a roller to compress the wet layers instead of using the chip brush which will distort the fabric weave with strong dragging as you do in this video.
Thank you so much for the video. It is helpful for me since I am trying to make some FRP pipes.
Can you use this technique to make a 11" diameter tube?
Sorry, new iPad. Still getting used to it. As I was saying: thank you for the fiberglass sing tutorial. Since watching it I've tried to find some Teflon coated peel ply, with little success. I've found some silicone coated peel ply. I'm wondering if you've tried it for glassing tubes and what your thought about it might be? Thanks!
what was that last layer called ? Did you say 'steel ply'? What is it for? What sort of mylar do you use - how thick is it (in mm)?
peel ply. It helps having a nice surface finish when you removed it
where did you get a 98mm mandrel. I am trying to find a madrel that is 99 mm OD to work as a motor mount tube.
Thank you for the info. Very impresses with your rocket building videos!
tfish38, what fiberglass cloth material is the one in the video. Plain, Satin, 2x2 twill?
aircraftspruce..it's listed as porous teflon coated release film...
good vid and very informative but pretty long u may shorten it a little
Is that a beeper?
Thank you for theg
The finished rocket flight ruclips.net/video/Oi624glWhmw/видео.html