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Old Oct 20, 2010, 07:52 PM
Lawn dart pilot/builder
Prime_8's Avatar
N.L. Canada
Joined Jun 2010
2,337 Posts
Discussion
Making small props for micros

Making small props for micros & pico .

I have been looking all over here and whole web on making props .

everything form large PVC pipe blade for windmills down to bent strip of tin on old free flight.

i know laminated wood is nice for scale and much exists .

but what would be good or I and a few others are after is reliable props and hub tricks . for 4mm motor range .. like a pico Z tail rotor up to mini storm launcher style .

i tested cutting a straw as if it was a PVC pipe style an it works but you have to laminate the blades for them to have any strength.

my next tests will be printing blade laminations out on paper and laminating them with WBPU , or epoxy .

all ideas welcome for pico to UM size .
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Old Oct 20, 2010, 08:29 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
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Here are a few pictures of how to make props and description from MPS(in French):
http://www.microplanesolution.com/mps_000003.htm
Homefly has the didel hubs prop connector, Didel PC03-10,prop connector, Didel PC02-7(they are discontinued by Didel so better grab what's left!).


http://www.homefly.com/products.asp?id=10&pg=2
Have a look at several of these for ideas:

http://www.aeronutz.flyer.co.uk/
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Old Oct 20, 2010, 09:30 PM
Lawn dart pilot/builder
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lol wow great links ,
i can read french . a bit .. lol

great ideas in there . easpecialy last link .
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Old Oct 20, 2010, 09:34 PM
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México D.F.
Joined Aug 2006
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here there are... but in spanish...

http://www.rcgroups.com/forums/showthread.php?t=918011

...............☼.......Leo
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Old Oct 20, 2010, 09:44 PM
"Unnecessary Necessity"
coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
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Before molding the carbon fiber on the bottle just drink the wine and it will translate easily
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Old Oct 20, 2010, 10:33 PM
Lawn dart pilot/builder
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N.L. Canada
Joined Jun 2010
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i was all about the wine .

i also like teh yogurt cups idea .

LOL
i my try to use the bottom of a soda can in a bit diff way .. using it as ajustable link between blade and hub for testing pitch .

also some materials are hard to come by without special orders. LOL

but great stuff so far.
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Old Oct 20, 2010, 10:46 PM
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San Diego, CA
Joined Oct 2005
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I used a styrofoam plate, cut the paddles out of the slightly bowled edge of the plate for some concave. Used .5mm CF rod and pushed it through a pinhole in a piece of wire insulation. glued the paddles to the rod pressed the wire insulation over the prop shaft. I've done this with a two and three blade configuration and they've been the lightest props I've built. with .5mm rod I went all the way up to a 2 inch diameter and it required gearing on a 4mm pager. On the three blade prop it was necessary to use a bit of CA glue on the hub to keep the blades from twisting and changing pitch.

I've also emulated the picoo-z style tail rotor using the same outline but scaling it up , then cutting the blade from a yogurt cup and twisting it to the propper pitch with a little heat The're a little heavier than the foam blades but they can be run direct drive at much higher rpm. Anything bigger than the picoo-z size blade and you need to go up to a larger motor or reduce the pitch.
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Old Oct 20, 2010, 11:08 PM
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i have about 20 aor so kits like this i did up for slider.

but just loose. so i should be ok for a few diff prop sizes ...
but i only have afew pico z style blades left . LOL
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Old Oct 21, 2010, 01:53 AM
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Melbourne, Australia
Joined May 2008
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Hey prime, somewhere I ran across a thread where someone was making props in a homemade vacuum former. Its a really good idea as you could use another prop as a mold to make a much lighter version. Granted theres a little trimming involved but think of the possibilities. Once you have the mold you want your in business. You could use slightly thicker or thinner material for weight and stiffness applications, anyway ill see if I can find the link..
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Old Oct 21, 2010, 02:22 AM
Lawn dart pilot/builder
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i saw one here too .

it was pretty cool but requires have the target props . so that's ok for my pico Z and air hogs blades .. and such i have .
could make em out of paper and PU.
then make molds of them . or carve a blade in hard wood , make a mold of it , then make mold(s) using multiples of that blade . LOL

well i still have to get home and try a few ideas out . LOL
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Old Oct 21, 2010, 09:57 AM
Storm Runner guy
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USA, OK, Muskogee
Joined Nov 2008
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Great thread Prime_8
Yep, i'm right at that point too, where for some projects, even the little heli rotors are heavy !
The paddle type seem the way and that method there Baratacus is very clear, thanks.
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Old Oct 21, 2010, 11:59 AM
Post Digger
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San Diego, CA
Joined Oct 2005
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on the two blade paddles if they share the same rod you're stuck with the pitch that you glue the paddles at. Upside is that they're cheap and easy to make. You can build 20 props with various diameters and pitch in about 10 minutes. with the three blade each blade had it's individual paddle so they could be twisted individually. This means balancing the pitch to be equal on all the paddles, but it also means you can adjust the pitch of the prop before you set it in the hub with cement. I liked the paddles on my scale aircraft that i wanted the prop wash to clear the fuse. I could put small paddles towards the end of the CF rod and throw a larger diameter prop but without the resistance of a full blade prop of the same diameter.
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Old Oct 21, 2010, 12:17 PM
Filin Sergey
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Ukraine-Mariupol micro-plane.com
Joined Mar 2009
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My prop http://micro-plane.com/index.php?opt...mid=13&lang=en
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Last edited by kulibin2; Oct 22, 2010 at 01:06 AM.
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Old Oct 21, 2010, 12:50 PM
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West of California Speedway, East of LaLa, North of Disneyland
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Quote:
Originally Posted by Prime_8 View Post
lol wow great links ,
i can read french . a bit .. lol

great ideas in there . easpecialy last link .
Quote:
Originally Posted by Nelo Tadeo View Post
here there are... but in spanish...

http://www.rcgroups.com/forums/showthread.php?t=918011

...............☼.......Leo
Don't forget that Google (search) has its Language Tools to translate from just about any language on earth to any other language.

Also, if you use Google Chrome as your browser, it will automatically ask you if you want a foreign website to be translated into English (or whatever language you selected as default when you installed it).
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Old Oct 21, 2010, 03:55 PM
Lawn dart pilot/builder
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N.L. Canada
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Quote:
Originally Posted by kulibin2 View Post
wow steps 12 & 13 could work for many materials.

very good way for light and strong blade forming .
and one can ajust pitch of prop by bore # on bit . LOL wicked ..

now i need magnet wire .. LOL actualy have soft baling wire should work teh same.
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