regarding to the last post of discovery of the metal rods

http://www.rcindia.org/for-sale/snakes-throttle-linkage-and-landing-gear-strut/new/#new

there is yet a another discover done by me in the same industrial estate

its about the fiber glass cloth

found a shop who sells fiberglass cloth .

the varieties are:

1mm cloth ( also called as fiberglass paper)  :Rs:80/ sqft
2mm cloth ( woven fiberglass)   70/ sqft
3mm cloth ( woven fiberglass)   70/ sqft

can send if needed no packing charges shipping at actuals

can call me on 9738382454 if required  

Hi,
If any person is interested in glass cloth or paper. check with the person who deals in duct Airconditioning. this material is used in the duct of the AC units, which runs inside the false celings of offices.

Sandeep

This a very generous gesture Vishvesh. I'll might need some, will get back to on this.

@sandeepm: i even checked that he even had that quality. it very soft and has more quantity of silk than glass.
the ones which i have mentioned are in equal proportion i myself have used them. more over i plan to make a mold from thermocoal and give him for molding to get a fiberglass plane and even will do the same thing with the wing

the complete plane made of fiber glass is expected to cost around  :Rs:700-800 ( made at their workshop) without the accessories like the tank, wheel, and all....

will try to make a sport plane out of it and let u all know the whole plane will cost around  :Rs:2000 in form of ARF( all accessories included)

Thats sounds great.. I am interested in a pusher trainer.. can you make one

Hi all,
guys pardon me for my ignorance but after pondring over a couple of threads on 'fibreglass' across various threads, i hav figured out following things-
-its lot more stronger than balsa, so an airframe made out of fibreglass dosen't needs any reinforcements
-its structural strength is a couple of times more than balsa or reinforced foam
-can be easily moulded into shapes
-is economic (as mentioned by Mr. Vivesh)
but what am unable to understand is-
-what about its weight (heavier or lighter than balsa)
-what building techniques are used (can an airframe be fabricated at home using this or some fancy stuff like injection moulding or vaccum forming is needed)
Regards
-Bilal

Guys am asking this coz m planning to scratch build a VTOL platform (inspired by the 'avatar scorpion gunship' ) that is self stabalised and can carry a camera payload. I think instead of building the airfrane out of balsa or reinforced foam, it would be better to mould it out of fibreglass (if thats possible to do at home coz i can't find any moulding shop that work with fibreglass here in sultanpur). So any help from the experienced members is highly appreciated

Hi I wanted to know is it as flexible (1mm) as cloth n if u want to make shapes or mold it can I mold it n do u also hav the adhesive to mold it into shapes. 

@ drrajdeepbrar: it is very flexible just as a cloth..... i dont know how they mold it but i know that you can apply arildite and stick it on the frame. keep the layer of arildite as thin as possible by using some water and squeezing out the excess

@Bilal : the fiberglass if properly fabricated can be as light as a balsa plane or even lighter than that but you need to have the skill and know the techinique of fiberglassing. And i have no idea how injection molding is done heard some one does it there... will see and try to get some GF propellers moulded

PS: person has asked me to get a mould of the fuse or the wing and he will give me a fiberglass fuse made from the mold ( i would give him some more  :Rs:s and keep the weight low)

even heard some one does it there... will see and try to get some GF propellers molded

Thanx do u hav photo of the product just need to see th quality of texture.

sorry i dont have it now.... will post in 2 days time....!!! 

some pics of the cloth

Quote from: R/C vish on April 03, 2011, 05:38:22 PM
@ drrajdeepbrar: it is very flexible just as a cloth..... i dont know how they mold it but i know that you can apply arildite and stick it on the frame. keep the layer of arildite as thin as possible by using some water and squeezing out the excess

Can araldite be thinned by water? I do not think standard epoxy dissolves in water

Quote from: R/C vish on April 03, 2011, 05:38:22 PM
And i have no idea how injection molding is done heard some one does it there... will see and try to get some GF propellers moulded

To the best of my knowledge GF propellers are usually glass filled plastic. They are not pure fibreglass.

The other products you are considering are fine. But do realise that propellers will have to be thoroughly tested over some time. A thrown propeller blade could have very nasty repercusssions besides being dangerous.

Quote from: R/C vish on April 01, 2011, 03:42:17 PM
1mm cloth ( also called as fiberglass paper)  :Rs:80/ sqft
2mm cloth ( woven fiberglass)  70/ sqft
3mm cloth ( woven fiberglass)  70/ sqft

the rate seem rather high. it costs around $1:00 per metre square ie 10sq feet at hobbyking. and around $ 4:00 at tower per sq yard ie 9 sq feet.
Unless you meant sq metre and typed sq feet by mistake.
regards
Avijit

No, Araldite (epoxy) can not be thinned with water. Rapid epoxy can be thinned with meth, but it also makes it weaker 

I went to many f.g industry around in my town. The thing is that how a mold from thermocoal can bare the heat of epoxy used in f.g. .it cant be like that. They need mold of POP or  f.g it self. I am really intrested in making a f.g boat if any one has good ideas pl come up with it cz i have tried out with aradlite but didn't got nice result! Last option i thought is to make a wooden mold for f.g boat.
Regards,
Ghanshyam

There is something called MRF epoxy thinner which should be available in automobile paint shops. it is used as a thinner for epoxy paints and works with araldite.
I use it to thin the araldite before painting the entire bare woodwork in a glow powered model to fuel proof it.
it costed me  :Rs:180 for 1 lit or 500ml i forgot which size i bought
regards,
Avijit

Quote from: Ghanshyam on April 11, 2011, 09:02:04 PM
I went to many f.g industry around in my town. The thing is that how a mold from thermocoal can bare the heat of epoxy used in f.g. .it cant be like that. They need mold of POP or  f.g it self. I am really intrested in making a f.g boat if any one has good ideas pl come up with it cz i have tried out with aradlite but didn't got nice result! Last option i thought is to make a wooden mold for f.g boat.

Try some of the moulding material used in dentistry.
They use the stuff to make moulds of teeth.
something called Alginate- the cheap variety costs  :Rs:180-200 per 1/2 kg.
should be plenty.
Maybe a professional dentist- someone who knows a dentist could enlighten us further
Before you coat it with araldite/ FG epoxy, rub it with 4-5 layers of carnuba car wax. This helps in releasing the mould at the end.
just a suggestion - i haven't tried it yet. but when i need to replace or built a cowl this is what i will use.
regards,
Avijit

Alginate is impression material used to copy teeth. N separating media can be used insted of wax.

@ PankajC : the arildite cannot be thinner than water but i used it as a comparison..... it will be something like the liquid in "gulab-jamun"  ....

@ sushil_anand: i spoke to the manufacturer he said around some time back(4-5yrs) he had done a GF prop used in a CESSNA / zenair (they probably use wooden... we have some army aviation unit planes here ) gonna get one done first even if it costs more... (the mold is gonna be made from the original masterairscrew ) the prop will gonna be properly balanced and will be tried and tested...... will let know the results....


@ avijit17basu  : the cost os the same that he told me.... even got it confirmed.... i guess there is some prob in customs(LHS cost more or they don't stock)....  and there is no personal profit in the stated cost.....


PS: the mold is gonna be made from thermocoal and then covered with fiberglass.... then it will be given for molding.... the dentistry material is costly and u need a lot of high precession tools to do it....

U can copy the plane with alginate n then pour plaster of Paris into the algina n make a mold. Then u can mild the fiberglass on it and remove the plaster if Paris mold.  Make sure u use some separating media between the plaster of Paris n fiberglass

actually i am gonna build a mold directly from cutting out templates by using the plan of the model.....  and thanks a lot for the help.... can u tell which store i can look for the stuff u mentioned and what exactly it is.... and how it works....  

Plaster of Paris is like 12-20 rs per kg and dental stone is much harder n just a bit more expensive. U ll get it at any place that sells dental instruments. Plaster is white n dental stone is green. IN belgaum ill get it easily next to the dental college n just find a first year dental student he'll tell u how to use it or chk out you tube.