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HelicopterMain Discussion › DIY Fibreglass canopies?
11-24-2017 11:55 PM  21 days agoPost 41
JuanRodriguez

rrProfessor

The Villages, Florida

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You are so good at it that you need to start a business making fiberglass canopies ..... make them for $10 dollars like you say a few posts up and sell them unpainted for $20 ..... you’ll make a killing !!!

Please let us know when they become available ...

Been there, done that and old enough to know better.....

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11-26-2017 03:37 AM  20 days agoPost 42
icanfly

rrElite Veteran

ontario

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yes if it were so easy. If the mold cost a thou for canopy and boom then the first 100 nits will have ten extra bucks tagged on to include that cost, then a little drop of maybe that whole ten is figured into later sales. The cost of labor being the most at four times the material cost due to lay up, resin mixing and handling, sourcing, sanding and clean up are just some of the added cost factored into a final price. Then there's the "X" factor, the extra specialness of an original design, got to pay the artist for the originality too. Add the cost of a shop and hydro and tools and spread the margins out over 100 pulls from the molds, doesn't look so promising does it. Now factor in a small measly profit of 10% and the guy behind the fab'ing will be asking if it's worth it just to make a puny extra ten bucks per knock out.

I figure if I publish the 420 blackbird canopy and boom set it'll be $150 in white un-painted minimum maybe more, definitely double in cf.

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11-26-2017 09:39 PM  19 days agoPost 43
JuanRodriguez

rrProfessor

The Villages, Florida

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I see you’re back on that good weed again.....you should change your username to “ icansurebs”

Been there, done that and old enough to know better.....

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11-29-2017 02:29 PM  16 days agoPost 44
icanfly

rrElite Veteran

ontario

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you say the nicest things

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12-08-2017 08:16 PM  7 days agoPost 45
BilleFly

rrNovice

USA

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Making molds is a Blast , (for Me) ; I'd rather make stuff
in my work-shop, than stuff dollars down a strippers
uniform, and purchase way expensive beer, or watch TV !

I build molds from plaster .

Only cretin types of epoxy
will stick to wet plaster.

Bille

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12-10-2017 03:14 PM  5 days agoPost 46
icanfly

rrElite Veteran

ontario

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cretin types of epoxy will stick to wet plaster.
please explain

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12-11-2017 01:21 AM  5 days agoPost 47
AirWolfRC

rrProfessor

42½ N, 83½ W

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cretin types of epoxy will stick to wet plaster.
Definition of cretin. 1 often offensive : one afflicted with cretinism. 2 : a stupid, vulgar, or insensitive person : clod, lout.

You won't find me sticking to wet plaster

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12-11-2017 02:54 AM  5 days agoPost 48
EEngineer

rrProfessor

TX

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or watch TV !
What's that TV doing in your picture?

If you don't watch TV....

Logo 600SXs, 800XX, TDR IIs

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12-11-2017 02:56 AM  5 days agoPost 49
icanfly

rrElite Veteran

ontario

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cretin refers to those of Crete, part of what he refers to in epoxies is "chemical resistant epoxy" the t i n part I'm not so sure.

A scuffed and white glued or latex adhesive prepped epoxy can probably grip to a plaster backing enough for it to stick for a long time. You'd have to make up a test patch to see what works best. The 3 layers of fiberglass cloth is very cheap to do, polyester pulls wont stick to epoxy much at all, and making an aluminum trim plate on the two halves where they mate is simple. The metal is so the fg can be trimmed without pulling the part from the mold right away, just take a knife and zip off the excess flange before it's completely cured. Mdf would be the same but not last for a long time after many part pulls. Two halves go back together and seam lay'd in (that is if the part is made in two parts and not one complete without seams).

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12-11-2017 03:04 AM  5 days agoPost 50
EEngineer

rrProfessor

TX

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cretin refers to those of Crete
No, it doesn't!

Pick up a dictionary....

People of Crete are known as Cretans....

Logo 600SXs, 800XX, TDR IIs

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12-11-2017 07:32 AM  5 days agoPost 51
BilleFly

rrNovice

USA

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I misspell certain , and get a rash of crap ! Perhaps you
could tell me how to make uncured epoxy , stick to wet plaster ?

An epoxy faced plaster mold ; it can be made
in 1/2 the time as a conventional fiberglass lay-up mold,
and it can be near +- 0.005" in tolerances . And if Ya use
the correct materials ; the mold is good for 500-F.

Bille

@ EEngineer
My girlfriend was watching a TV show, while i worked on
my Heli.

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12-11-2017 12:25 PM  4 days agoPost 52
Heli_Splatter

rrElite Veteran

USA

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Thanks for posting info. I would certainly like to read and see more of your techniques.

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12-12-2017 01:19 AM  4 days agoPost 53
EEngineer

rrProfessor

TX

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My girlfriend was watching a TV show, while i worked on
my Heli.
Just razzing ya.....I use the TV as background "noise" myself....

BTW, I knew you misspelled "certain".....and I didn't correct you.

Logo 600SXs, 800XX, TDR IIs

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12-12-2017 10:39 PM  3 days agoPost 54
icanfly

rrElite Veteran

ontario

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same bs as always, like "Amen" instead of "Amun", same thing different people and times. That's how everything regarding knowledge we have today has gone, to later generations who thought they would improve on something not broken and in no need of "fixing".

Yes how do you get cured epoxy to stick to plaster? or is it "uncured" as you say? semi cured epoxy can stay tacky before it hardens completely, do tell.

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12-12-2017 10:42 PM  3 days agoPost 55
EEngineer

rrProfessor

TX

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same bs as always
You mean your BS?

That you don't know proper English?

And that is somebody else's fault?

Logo 600SXs, 800XX, TDR IIs

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12-15-2017 02:55 PM  18 hours agoPost 56
icanfly

rrElite Veteran

ontario

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so every rc heli flyer has to have a major doctorate diploma in english from Harvard or Oxford U's now heh, is that how you want it?

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12-15-2017 03:40 PM  17 hours agoPost 57
AirWolfRC

rrProfessor

42½ N, 83½ W

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No . . . but if you make a typo, realize that you earned a couple of knocks and your mother can't protect you.

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12-15-2017 11:32 PM  9 hours agoPost 58
BilleFly

rrNovice

USA

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AirWolfRC
No . . . but if you make a typo, realize that you earned a couple of knocks and your mother can't protect you.
YEA -- i had to, (try) to get good at that ; i Can't spell for squat.
That doesn't correlate, or infer that i'm stupid though ; as a lot of
people like to think, about guys that can't spell.

An example :
My Mom was born in Italy,and she spoke (7) languages, (could think)
in 5 of them ; she was absolutely brilliantine with linguistics
BUT
she couldn't open the lock on a cabinet door !! LOL

I can design, build, and use a prosthetic leg ; but can't
see words in my head , like my mother could. She would actually
look up and to the right, to read her black-board ; without
knowing a person like that , i can tell you what side of your
brain that you are was using , when you do that.

OK -- so which one of us was Stupid ; Mom or Me ?

ALL humans are better at some things, than they are at other
stuff and if it weren't that way, then Humanity would still be
stuck technologically speaking somewhere in the 11'th
century ; instead of our knowledge-pool doubling at a rate of
Every Year , like it IS now.

Look up functional fixedness ; it's one of the hardest flaws that
we humans need to overcome , for problem salving.

Now back on topic ; start here, and this might turn into a really
Good discussion :

http://www.ptm-w.com/technical-libr...20Procedure.pdf

Bille

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12-16-2017 12:06 AM  9 hours agoPost 59
Heli_Splatter

rrElite Veteran

USA

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I got trolled really hard for a spelling correction that I made in one of these forums. I don't bother anymore. There is a free browser add-on called Grammarly that flags spelling and many other writing problems.

If you care, you could get this help for free.

I am enjoying what you post on molding.

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HelicopterMain Discussion › DIY Fibreglass canopies?
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