RC India

Hi Guys ,
Since I saw VC's para sailing I have been thinking  of  making a RC trike .

Any Idea where we can get  the parachute Rip stop material  in India ?

Sai

Good quality 'Rain Cover' for Ruck Sacs have them.Check them at local Adventure gear shop. You would also need Mylar lines as well :D

Why not a kite ? Should be available in most toy stores.

http://www.rcindia.org/electric-planes/daryl's-micro-glider/ (http://www.rcindia.org/electric-planes/daryl's-micro-glider/)

Car covers are made of "PARACHUTE" cloth.
Wouldn't trust my life on it, but it is suitable for making a RC Paramotor trike.
avijit

Avijit is right! even Umbrella have air/water proof fabric.
But exact 'Rip-stop' fabric is little more specialized.

I have also been looking for a "Rip Stop" Material. Sure umbrella material is bit better, if the umbrella is of a reputed brand. but ruck-sack covers tend to tear apart after seeing some sun(and water) they develop crack along the folding lines..same is true with car-covers (i dont think they r made of parachute material)
I have used para. mat. in office, but unfortunately though we have a lot of it can't bring it out! :-(
Anyone who has traveled to the north may have seen tents made of parachute material. it is very soft but thick. and just with the feel of it one can tell it can take all the weathering!!
i will try to see if we can get some.

hey everybody just go on road at night with a paper cutter and find a car covered with silver car cover :D and then use the paper cutter .........you will surely get the material you need.......

no need of getting so fancy - go to your local salwar kameez shop
and buy chunni material - choose one with a tight weave
cut it out and make a parasail - you don't even have to stitch it - use
fevicryl fabric glue.

paint the cutting line with a solution of quickfix and thinner before
applying scissors.

I have made a rc trike with a parasail  - will post photos if I can find it

can you also post he step wise procedure to make rc trike with parasail.....


thankyou


regds


Kartik

The orginal parachutes were made of silk (before advent of synthetic materials) and Bangalore was a major hub for supply of silk to all the Allied forces.
So why not revert to good old silk?

Wahh!! Another way to give another life to the old Silk Sari lying in your wive's closet!! haha!!

:giggle: :giggle:

Apparently you are not married ;)  When you do get married, just TRY cutting up ANY silk saree :giggle: :giggle:  Unless you have some kind of death wish or terminal disease !

Maybe he has a silk Kurta or Mundu which can be cut up

An article that I found in web

----------------------
The material used in the parachute plays a vital role in its functioning. The foremost property of the material which is chosen to make a parachute should be its resistance to wind. Only a windproof material can sustain the winds blowing at such high altitudes. Another important property is the density of the material. Density and time taken to complete the fall have a direct relationship, i.e. denser the material of the parachute, faster will be the speed at which the chute will come down. Rigidity of the material also plays an important role in determining the time taken to complete the fall. Rigidity directly affects the shape of the parachute, and shape in turn affects the stability. If the parachute is stable, it will descend slowly, but if it swings owing either to the shape or the movement of the parachutist, it will lose air and come down at a greater speed. The texture of the parachute fabric also affects the drag, but the impact is minimal.

The canopy of the parachute was initially made of canvas, and eventually replaced by silk. Silk, being thinner, lighter, stronger, fire resistant and easily foldable, proved to be a better material than canvas. In late 1930s and early 1940s, the United States was not able to import silk required to make parachutes, owing to ongoing World War. During this phase the innovators came up with an idea of replacing silk with nylon. This proved to be beneficial, as nylon had good elasticity, was resistant to mildew, and relatively less expensive.

Although nylon still remains to be the first choice for parachute canopies, more recently Terylene, a variety of polyester fabric, and Kevlar, a strong and heat resistant synthetic fiber, has also been used to make parachutes. The nylon fabric used in parachute is woven in a specialized manner, with extra thick thread, to create a pattern on small squares. The technique proves to be helpful when the canopy experiences small tears, as these small squares avoid the tears from spreading. Even the harness straps and the suspension lines are made of nylon. The ripcord, pulled to open the parachute, is made from stainless steel cable. Forged steel, coated with cadmium, is used to manufacture the metal connectors used to gather the suspension lines. This cadmium coat prevents the connectors from rusting.

The descent of the parachute largely depends on the parachute material, therefore it is important that the material chosen is windproof, light, flexible and has a fine texture. At the same time being inexpensive and abundantly available will also add to its benefits. The parachute canopy has come a long way from plain canvas material to Kevlar, a strong synthetic fiber. May be we will have even better parachute materials someday, but right now the stakes are on nylon, as it covers all the required necessities for a good parachute fabric.
------------------------

Not sure how this is  useful

"give another life to the old Silk Sari lying in your wive's closet"

Do this and get your life taken away. ;D

Only an unmarried person >:D will dare to give this suggestion. ;D :giggle:

Just shows the age of the article. Terylene was a trade name for a polyester fabric introduced by ICI in the late 50's !!

Always a good idea to quote the source of your research, that way readears can make thier own informed decsions   

hey guys i have just got some high grade balloon (stratosphere/ ionosphere one) material with me..
i plan to make some glider/ motor planes this weekend

Please can some on send me plans/drawings which i can print today and then transfer to the plastic and make ones??
ASAP.. please..

Even I suspect the article is too dated. More than the Canopy themselves, the lines are much more critical to the flying characteristic and create havoc if they stretch under load.

Almost all the 3-4 para gliders I have flown have 'Kevlar' lines protected with nylon mesh (like electric iron wire) and account for a large part of the cost of the glider (Rs 1.5L to 3 L). Kevlar (similar material of spider web) has a property even best steel don't have - they don't stretch. This keeps the aerodynamic structure of the canopy intact what was designed on the board, irrespective of the load (again under the specified limits)

MPP, did you get that balloon from local/Airport Weather station ?

LOL...  Sai this is a similar reply to the corrogated sign boards that were available from one of the roads you mentioned in one of your threads... about coro spads somewhere.. ;)  


On a serious note, I spoke to Eshwar from ENR models in Bangalore; enrmodel@yahoo.com
tel; 9198 860 303 88
He told me he is into it on a commercial scale and is producing micro planes with Para material wings to order for his customers..

1 - 3L pheewww thats huge!!


Yes it was something of that sort but not local.
BTW, if anyone wants to try it out i can give you sheets. it is very thin but strong!

Hi Mpp,
Are you talking about the parachute material being very thin??
Or is it a substitute freely available at a cheaper price....? Please expand..  :headscratch:
BTW,  In Old Delhi  Sadar Bazaar and  Azaad Market are the wholesale places for umbrellas, car covers, raincoats, camping tents etc. I am going to ask someone in Delhi to get info if one can get light weight umbrella fabric with a built in ripstop check.
That should do your job Sai....

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Well, like i had mentioned in my earlier post i had access to this material. Its not Parachute but Balloon material. It was meant to be launched as a balloon but the roll had some defects at the end, hence the whole roll was rejected. i got a sheet from this roll. its defect free but strict rules doesnt allow u the launch! as it is something i got as 'scrap' material from my office, its so to say free!! (someone did a 'personal favour' for me!) pity that such high quality, custom made material just lies around as 'plastic'!!
So if someone wants to try out some novel things, s/he is free to take it from me. only arrange for the shipping!!

Also, i inquired around and heard that there r some shops in Mumbai who import Parachute Material. Will check and let u know the details.

Btw, i wud like to know how many are really interested in buying this material?? cause this guy will like to sell large amount and not small sheets. i can bargain for price from him if ppl are willing to buy.

hi
  iam alex planing to build a paraglider iam in need of the cloth do u still have the material with u if yes please send me pm